73 results about "Glass disc" patented technology

The invention discloses a detection angle adjusting device for automatic detection equipment and a transparent glass rotary table. The detection angle adjusting device comprises a mounting base body, a linear driving assembly, a rotary driving assembly, a snapshot assembly and a light source assembly. The linear driving assembly is fixed to the installation base body, the rotary driving assembly is connected with the linear driving assembly, the snapshot assembly is installed at the output end of the linear driving assembly, and the light source assembly is arranged corresponding to a shooting area. The transparent glass rotary table comprises a transparent glass disc, a belt driving wheel, a magnetic coupler, a servo motor and a supplementary light source and works cooperatively with the angle adjusting device. The snapshot assembly is driven by the linear driving assembly to vertically move, the angle of the snapshot assembly is driven by the rotary driving assembly to turn over, and all-directional shooting of the rubber ring can be completed without an upender in cooperation with rotation of the transparent glass rotary table and light supplement of the supplementary light source; the method has the characteristics of complete detection coverage, high efficiency, low cost, high precision and strong stability, and is suitable for the full-automatic detection scene of invisible cracking of the rubber ring.

The utility model relates to a pattern disc module and a moving head lamp with the same. The pattern disc module comprises a first mounting plate, a water wave glass disc, a pattern disc and a plurality of driving assemblies, a light-transmitting through hole is formed in the first mounting plate; the water wave glass disc and the pattern disc are sequentially arranged above the mounting plate from bottom to top; a plurality of pattern pieces are mounted on the pattern disc, and the pattern pieces are sequentially arranged in the circumferential direction of the pattern disc and are different from one another; the multiple driving assemblies are used for driving the water wave glass disc, the pattern disc and the pattern piece to rotate correspondingly, so that the water wave glass disc, the pattern disc and the pattern piece can rotate to the position over the light-transmitting through hole. According to the scheme, the light and shadow effect of patterns can be enriched, the dynamic sense of light and shadow is greatly improved, better visual perception is given to audiences, the structure is simple, practicability is high, and the effect is outstanding.

The utility model discloses a low-light CCD (Charge Coupled Device) camera which comprises a shell, a rainproof cover is arranged on the shell and is in sliding connection with the shell, a connecting piece is fixedly arranged at the bottom of the shell, a lens assembly is arranged in the shell and comprises a circuit board, a camera and an infrared lamp, light-transmitting glass is arranged in front of the lens assembly, and the light-transmitting glass comprises a first glass wafer. The first glass wafer is connected with the shell through a clamping groove, a second glass wafer is arranged on the side surface of the first glass wafer, the second glass wafer is fixedly connected with the first glass wafer, a light shielding ring sleeves the outer side of the second glass wafer, and the other end of the light shielding ring sleeves the outer side of the camera; the utility model has the advantages of shielding internal stray light, good anti-seismic effect and the like.

The utility model discloses a large-size product optical inspection device, which comprises a glass disc and two groups of inspection mechanisms arranged along the circumferential direction of the glass disc, each inspection mechanism comprises a slide rail, a cross arm, a rectangular frame, a plurality of cameras, a strip-shaped light source and a surface light source, the cross arm is slidably arranged on the slide rail through a first slide seat, and the rectangular frame is arranged on the cross arm. The rectangular frame is arranged on the sliding rail in a sliding mode through a second sliding seat, the area light source is arranged on the sliding rail in a sliding mode through a third sliding seat, the rectangular frame and the area light source are located on the two sides of the glass plate respectively, the cameras are arranged on a cross arm, and the bottom of each side edge of the rectangular frame is provided with a strip-shaped light source. According to the utility model, the front and back surface inspection of various large-size products can be met, only two inspection stations are needed, the overall size of the equipment can be ensured not to be too large, the inspection efficiency is ensured, the space is saved, and the products can be prevented from deviating or being thrown out due to too large centrifugal force.

The utility model relates to the technical field of jewelry detection and sorting, in particular to an intelligent jewelry bare stone detection and sorting machine which comprises a workbench, a driving motor is installed on the top of the workbench, a material guiding glass plate is installed on the top of the driving motor, a material discharging hole is formed in the top of the material guiding glass plate, and a material discharging opening is formed in the top of the material discharging glass plate. The top of the workbench is provided with a blanking sleeve, the bottom of the blanking sleeve is provided with a discharge port, the top of the workbench is provided with a detection assembly, the detection assembly is used for photographing and detecting jewelry bare stones on a guide glass plate, the top of the workbench is provided with a classification assembly, and the classification assembly is used for classifying the jewelry bare stones on the guide glass plate. And the classification assembly is used for classifying and screening the detected gem and jewelry bare stones. Jewelry bare stones can be conveyed and rotated through the material guiding glass disc, the jewelry bare stones can be conveniently detected by the detection assembly, continuous work can be achieved, the influence of human fatigue is avoided, the selection efficiency is greatly improved, and the jewelry bare stones can be detected and screened through the detection assembly and the classification assembly.

The invention relates to the technical field of metal connecting pieces, and particularly discloses metal connecting piece production quality detection equipment which comprises a first machine base and a second machine base, a pedestal is fixedly connected to one side of the interior of the first machine base, and automatic cleaning of a camera lens and the surface of a glass disc is synchronously achieved through cooperative operation of an air blowing mechanism and a wiping mechanism; in the cleaning process, high-pressure air generated by the air pump is distributed through the straight air guide pipe and the three-way pipe and then is accurately sprayed to the surfaces of the camera lens and the glass disc from the first air blowing head and the second air blowing head, attached metal chippings and floating ash are rapidly blown away, meanwhile, a banister brush of the wiping mechanism is driven by the power assembly to do reciprocating motion, and the cleaning effect is achieved. According to the technical scheme, stubborn chippings left after air blowing are gently wiped, double cleaning ensures that the lens is clear and the surface of the glass disc is flat, manual regular cleaning is not needed, the maintenance difficulty is lowered, the labor cost is saved, and the problems that the lens is fuzzy and the detection datum plane precision is reduced due to chipping accumulation are solved.

The utility model belongs to the technical field of insulator detection devices, and particularly relates to a visual steel foot glass disc concentricity detection mechanism. The steel foot detection device comprises a detection base, and a steel foot placing hole groove is arranged in the detection base. In the use process, steel of a glass insulator is placed in the steel foot placement hole groove, the bottom of a glass plate of the glass insulator is aligned through the glass plate alignment installation supporting bottom piece, it is ensured that the glass plate is in a horizontal state, inclination is avoided, the steel foot is fixed through the automatic fixing steering piece, and the glass plate is fixed through the automatic fixing steering piece. The multi-directional inner and outer circle concentricity measuring assembly is moved towards one end close to the glass disc until the multi-directional inner and outer circle concentricity measuring assembly is in contact with the inner circle and the outer circle of the glass disc, the automatic fixed steering part drives the steel foot to rotate, and the multi-directional inner and outer circle concentricity measuring assembly can simultaneously perform synchronous concentricity detection on the inner circle and the outer circle of the glass insulator without multiple times of detection. And meanwhile, the device can adapt to glass insulators of various specifications, and is relatively high in practicability.

The application discloses a method for analyzing silicon nitride manganese alloy by glass melting X-ray fluorescence spectrum, and comprises the following steps: step one, mixing a sample and an oxidizing agent and placing them in the middle of a platinum yellow crucible with a flux on the bottom; step two, placing the sample in an electric heating automatic melting furnace to prepare a to-be-detected glass disc by borate melting; step three, completely melting, automatically casting, cooling the sample disc, demolding and obtaining a glass disc for X fluorescence analysis; and step four, optimizing analysis parameters, establishing a working curve, performing sample analysis and obtaining the content of measured elements. The application relates to the technical field of metallurgical chemical analysis and detection, and particularly relates to a method for analyzing silicon nitride manganese alloy by glass melting X-ray fluorescence spectrum.

The utility model discloses an AOI appearance detection device for an inductor, which belongs to the technical field of inductor appearance detection, and comprises a workbench and a turntable arranged at the top of the workbench and connected with the output end of an external rotating motor, the rotating motor drives the turntable to rotate clockwise, a transparent glass plate is arranged on the outer edge of the turntable, and the transparent glass plate is provided with a plurality of grooves. According to the inductor appearance detection device, the rotating disc is driven by an external rotating motor to rotate clockwise, so that an inductor product at the top of the transparent glass disc passes through the appearance detection mechanism; the front face, the inner side face, the outer side face, the back face, the back face and the front face of an inductor product are sequentially subjected to appearance detection through the front face detection mechanism, the inner side face detection mechanism, the outer side face detection mechanism, the back face detection mechanism and the front face detection mechanism. And the inductor products are sorted and collected.

The invention relates to a high-fidelity joint simulation method for a micro-hemisphere structure forming process, which comprises the following steps: establishing a temperature simulation three-dimensional model based on a nozzle of a flame blast burner used in the micro-hemisphere structure forming process, and simulating a temperature field generated by the flame blast burner based on the temperature simulation three-dimensional model to obtain a temperature field simulation result; the method comprises the following steps: establishing a fluid field simulation three-dimensional model for a forming mold and a glass wafer used in a micro-hemisphere structure forming process, and defining a first relational expression that the material viscosity of the glass wafer changes along with the temperature; and importing a temperature field simulation result into a simulation environment of the fluid field simulation three-dimensional model, simulating deformation of the glass wafer under the driving of a heat source and negative pressure based on the first relational expression and a dynamic grid method, and outputting a joint simulation result of the micro-hemisphere structure forming process. According to the scheme, the deformation condition of the micro-hemispherical resonance structure when the structure size and the process parameters change can be effectively and accurately simulated, and a reference basis is provided for structure optimization design and process adjustment and optimization.

Disclosed is a glass laminate structure of flexible glass and a method for manufacturing the same. The glass laminate structure includes a carrier substrate having a certain width and length and a first thickness; a laminate glass laminated on the carrier substrate and having a plurality of glass discs having a second thickness smaller than the first thickness; a high-viscosity adhesive line arranged at the peripheral portion of the carrier substrate and each glass disc to adhere the carrier substrate and the glass disc laminated adjacent to each other, and having a pair of concave-convex lines spaced apart in a first direction and extending in a second direction and a pair of linear lines spaced apart in the second direction and extending in the first direction; and a low-viscosity adhesive film arranged in a planar shape to cover a unit area of the carrier substrate and each glass disc defined by the concave-convex lines and the linear lines to adhere the carrier substrate and the glass disc laminated adjacent to each other. By preventing backflow of bubbles of the adhesive film, the effective unit area can be increased.

The present application relates to a kind of micro hemispherical structure forming process high fidelity combined simulation method, comprising: the nozzle of the flame torch used in micro hemispherical structure forming process is based on temperature simulation three-dimensional model is established, and temperature field generated by flame torch is simulated based on temperature simulation three-dimensional model, and temperature field simulation result is obtained;The forming mold and glass disc used in micro hemispherical structure forming process are based on fluid field simulation three-dimensional model is established, and the first relational expression that the material viscosity of glass disc changes with temperature is defined;Temperature field simulation result is imported to the simulation environment of fluid field simulation three-dimensional model, and the deformation of glass disc is simulated under the driving of heat source and negative pressure based on the first relational expression and dynamic mesh method, and the combined simulation result of micro hemispherical structure forming process is output.This scheme can effectively and accurately simulate the deformation of micro hemispherical resonant structure when structural size and process parameter change, and provide reference for structure optimization design and process adjustment optimization.

The utility model relates to a brush wheel cleaning device, which belongs to the field of visual glass sorting machines and comprises an adjusting mechanism. The rotating mechanism is arranged on the adjusting mechanism; the cleaning assembly is arranged on the rotating mechanism, comprises a connecting sleeve and is arranged on the rotating mechanism; the two mounting holes are symmetrically formed in the outer side of the connecting sleeve; and the two limiting pieces are respectively arranged on the inner sides of the two mounting holes. According to the visual glass sorting machine, the rotating mechanism and the cleaning assembly are arranged, so that the visual glass sorting machine is not influenced by dirt and scratches on the disc surface, the qualified rate of detection is improved, meanwhile, the service life of a glass disc is prolonged, and under the action of the adjusting mechanism, the position of the brush wheel can be adjusted, so that the cleaning effect of the brush wheel on the glass disc is improved; and meanwhile, under the action of the limiting piece, the brush wheel can be replaced more conveniently, so that the sorting efficiency of the visual glass sorting machine is improved.

Viscoelastic coagulation monitoring systems having two glass discs mounted on flexible plastic arms for receiving a sample of blood therebetween, and an analyzer configured to measure a coagulation response of the sample of blood to determine whether the sample of blood indicates a hypercoagulable state in a HS patient are provided. The system may cause movement of a first glass disc relative to a second glass disc at a sufficient speed to cause coagulation of the sample of blood, and the analyzer may measure various parameters of the coagulation response including, e.g., Clotting Time (CT), Clot Formation Time (CFT), Alpha Angle (a-angle), Maximum Clot Firmness (MCF), Amplitude at 10 and 20 minutes (A10, A20, respectively), Lysis Index at 30 and 45 minutes (LI30 and LI45, respectively), indicative of a hypercoagulable state in a HS patient.

1. The name of this design product: Ceiling lamp (used glass disc). 2. Application of this design product: for indoor lighting. 3. The key point of the design of this product lies in the shape of the product. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1. 5. The top surface of the design product is difficult to see or cannot be seen during use, so the top view is omitted.

A method for producing a structured glass disk is provided that includes the steps of: providing a glass disk having a thickness of at most 400 μm; directing and focusing a laser beam onto the glass disk such that the laser beam produces an elongated focus within the glass disk with an intensity sufficient to produce damage within the glass disk along the elongated focus; moving the laser beam and the glass disk relative to one another to insert damage zones along a ring-shaped path so that a workpiece is defined in the glass disk with the ring-shaped path encompassing the workpiece and with the workpiece remaining connected to the glass disc; exposing the glass disk to an etchant so that the etchant intrudes into the damage zones; and chemically toughening the glass disk with the workpiece.

1. Name of the product in this design: Single-glass-disc optical sorting machine. 2. Application of this design: The visual sorting machine is an automated sorting device based on machine vision technology, which can inspect and sort products. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key features: the front view.

The utility model discloses epitaxial equipment and a slide glass disc of the epitaxial equipment, the top of the slide glass disc comprises a slide glass platform, a support ring clamping groove and a peripheral wall from inside to outside in sequence, the support ring clamping groove is clamped between the slide glass platform and the peripheral wall, the height of the slide glass platform is higher than that of the peripheral wall, and the support ring clamping groove is clamped between the slide glass platform and the peripheral wall. At least three arc-shaped air guide grooves are formed in the bottom of the slide glass disc, and the arc-shaped air guide grooves are rotationally symmetrical around the rotating central axis of the slide glass disc. The top of the slide glass disc is provided with the slide glass platform, the supporting ring clamping groove and the peripheral wall, the supporting ring clamping groove is formed between the slide glass platform and the peripheral wall, so that a clamping ring can be conveniently fixed in the supporting ring clamping groove, the mounting is convenient, and meanwhile, the bottom of the slide glass disc is provided with at least three arc-shaped air guide grooves; the arc-shaped air guide grooves are rotationally symmetrical around the rotating central axis of the slide glass disc, so that the rotating capability of the slide glass disc is effectively enhanced, and the adaptability of the slide glass disc is also improved.

The utility model discloses a high-speed glass disc type visual inspection device, which is characterized in that a feeding track is arranged obliquely above a glass disc, a mounting mechanism is arranged on the left side of the bottom surface of the feeding track, a driving mechanism is arranged on the front surface of the mounting mechanism, a component in a driving end is started, and then a component in a mounting end is driven to adjust, so that the glass disc type visual inspection device is realized. The guide end sleeved on the mounting end is driven to adjust along with the adjustment of a component in the mounting end, so that the height of the distance between the guide end and the glass plate is adjusted, and then the adjusting end drives the component in the connecting end to adjust, so that the connecting end and the right side of the top surface of the glass plate are always in a contact state; a structure used for adjusting the distance and the height between the glass plate and the feeding track is additionally arranged, it is guaranteed that the height between a conveyed part and the glass plate is matched, the service life of the glass plate is prolonged, and the safety of the part in the conveying process is improved.

The utility model discloses plastic part detection equipment with a Type-D interface, and the plastic part detection equipment comprises vibrators, a visual test bottom, a vibrator product discharge channel, a transparent glass disc, a CCD test module, a probe, an air blowing and discharging part, a storage mechanism and a rotary motor, and the two vibrators convey products to the inner ring and the outer ring of the transparent glass disc through the product discharge channel at the same time for testing; and the tested products are conveyed to the defective product storage mechanism and the non-defective product storage mechanism for classified output. According to the invention, the defects of missing detection of a manual detection mode and confusion of different types of plastic part products are overcome, the stable detection effect of the plastic part of the Type-D interface is ensured, the detection efficiency is improved, the yield of a production line is further improved, the production operation cost can be reduced, and the goal of lean production is achieved. Under the condition that the detection quality is guaranteed, the labor cost is reduced, the operation time is short, and the operation efficiency is greatly improved.

The utility model belongs to the field of medical apparatus and instruments, disclose a kind of quadriceps tendon minimally invasive tendon harvesting device in knee ligament reconstruction surgery, including stem body;Any end of stem body is detachably connected with tendon harvesting head;Channel for arthroscope insertion is opened in stem body inside, channel is coaxially placed with stem body, channel penetrates both ends of stem body;Transparent glass disc is equipped in stem body inside, glass disc is coaxially placed with stem body, and glass disc is located in one end of stem body close to tendon harvesting head, the projection of channel along its axial direction is located in the inside of glass disc peripheral wall, and the connection position and external shape structure of tendon harvesting head make the axis extension direction of channel keep open visible space;Medical staff can operate by single hand holding stem body and arthroscope, and can ensure arthroscope and stem body synchronous movement in operation process, effectively solve the problem that existing technology exists when holding tendon harvesting instrument and arthroscope with two hands, operation is complicated and difficult to move synchronously, easy to cause arthroscope vision unstable.

This invention belongs to the technical field of quartz glass discs, and particularly relates to a chamfering device and method for quartz glass discs; comprising: a base plate; two support plates, respectively disposed on the left and right sides of the base plate; brackets disposed on the front and rear sides of the top of the support plates; a first motor disposed between the two brackets on the same side; a placement plate disposed on the output shaft of the first motor; a chamfering assembly disposed on one of the support plates for chamfering the quartz glass disc; a polishing assembly disposed on the other support plate for polishing the chamfered quartz glass; and an auxiliary assembly disposed on the support plates for assisting the chamfering assembly and the polishing assembly in moving closer to or further away from the quartz glass disc, facilitating chamfering and polishing of quartz glass discs of different sizes. This invention provides a chamfering device and method for quartz glass discs that can polish chamfered discs, is convenient to use, and saves time.

The utility model discloses a glass plate cleaning device and visual flaw detection equipment, and belongs to the technical field of visual flaw detection. The glass plate cleaning device comprises a top cleaning assembly, a connecting rod assembly and a bottom cleaning assembly; the lifting unit is used for driving the first sweeping piece to lift and sweep the upper surface of the rotating glass rotating disc when the first sweeping piece abuts against the upper surface of the glass rotating disc; the bottom cleaning assembly comprises a second sweeping piece, the second sweeping piece is connected with the lifting unit through a connecting rod assembly, and the lifting unit is further used for driving the second sweeping piece to ascend through the connecting rod assembly to abut against and sweep the lower surface of the glass rotating disc when driving the first sweeping piece to descend. When the first cleaning piece is driven to ascend, the second cleaning piece is driven to descend to be far away from the lower surface of the glass turntable through the connecting rod assembly. The glass turntable can be cleaned through the top cleaning assembly and the bottom cleaning assembly, so that the glass turntable is kept clean, and the accuracy of shooting detection analysis is ensured.

The utility model relates to the technical field of gear sorting, in particular to a glass plate structure for gear sorting, which comprises a cabinet body, a sorting glass plate and a visual inspection camera. An output shaft of the gear motor is connected with a rotating column through a coupler, the top of the rotating column is connected with a glass sorting disc through a connecting disc, automatic discharging frames are installed on the two sides of the top of the cabinet body through bolts, and a first pushing electric cylinder is installed on one side of each automatic discharging frame and located at the upper end of the glass sorting disc through an L-shaped installing plate. A second material pushing electric cylinder is mounted on one side of the first material pushing electric cylinder through an L-shaped mounting plate, and a visual detection camera is mounted at one end of the automatic discharging frame through a camera mounting frame. The gear sorting adopts a glass disc structure, so that automatic rotary feeding is facilitated, the automatic gear sorting efficiency is greatly improved, the operation is convenient, the automation degree is high, time and labor are saved, and the effect is remarkable.

The invention discloses an alloy resistor six-face optical detection machine which comprises a machine table, a feeding mechanism, a six-face optical detection mechanism, a transferring mechanism and a sorting mechanism, and the feeding mechanism, the six-face optical detection mechanism, the transferring mechanism and the sorting mechanism are installed at the top end of the machine table and arranged around the transferring mechanism. The feeding mechanism comprises a vibration disc and a feeding channel used for resistor feeding. And the transfer mechanism drives the glass disc to transfer the resistor through a speed reducer by a driving motor. The six-face optical detection mechanism is composed of a bottom face optical detection unit, a top face optical detection unit, a front face optical detection unit, a back face optical detection unit, a left side optical detection unit and a right side optical detection unit, all the units adopt structures such as cameras matched with supports and prisms, and resistor six-face detection is achieved through the optical reflection principle. The sorting mechanism is divided into a qualified product sorting unit and an unqualified product sorting unit. The detector can comprehensively, quickly and accurately detect six surfaces of the alloy resistor, improves the detection efficiency and accuracy, is compact and reasonable in layout, and reduces the equipment cost and maintenance difficulty.

The invention relates to the technical field of magnetic core detection, and discloses glass turntable six-surface appearance detection equipment for a magnetic core, the glass turntable six-surface appearance detection equipment comprises a feeding machine, a detection machine and a material receiving and plate arranging machine, the feeding machine is arranged on the front side of the material receiving and plate arranging machine, the detection machine is arranged on the right sides of the feeding machine and the material receiving and plate arranging machine, and an objective table is fixedly connected in the detection machine; through cooperative use of the grading mechanism and the material receiving and tray placing machine, fine grading of magnetic core products of different sizes and different models is achieved, grading is directly conducted on the glass rotating disc, then the magnetic core products are received on different material carrying plates through the material receiving and tray placing machine, grading is conducted firstly, then conveying is conducted, and the efficiency is high. Compared with the traditional process of firstly guiding from the glass disc to the conveyor and then grading, the automatic glass turntable has the advantages that the connection points are fewer, the failure rate is lower, the automatic cleaning of the glass turntable body is realized through the cooperative use of the six-surface observation mechanism and the circulating scraping mechanism, the influence of dust on the detection result is avoided, and the detection accuracy is improved.

The utility model provides a marine rotary window structure which comprises a main frame, a rotary glass optic disc, a motor, a motor mounting seat sleeve, a fastening bolt and a window glass limiting frame, a connecting beam rod is arranged at the top end of the motor mounting seat sleeve and is in bolted connection with the main frame, and a threaded shaft is mounted on an output shaft of the motor and is in bolted connection with the motor mounting seat sleeve. The threaded shaft is connected with a center hole of the rotary glass optic disc, the fastening bolt penetrates through the center hole of the rotary glass optic disc and is connected with a threaded groove of the threaded shaft, an optic disc notch is formed in the front end of the main frame, and the rotary glass optic disc is located in the optic disc notch and can rotate along the main frame. According to the utility model, the output shaft of the motor is provided with the threaded shaft, the threaded shaft is connected with the central hole of the rotary glass optic disc, and the fastening bolt passes through the central hole of the rotary glass optic disc and is connected with the threaded groove of the threaded shaft, so that the installation of the rotary glass optic disc has a good fastening effect, and the connection firmness is improved.

The invention relates to a full-automatic grinding unit and a grinding method for an MT insertion core, and belongs to the technical field of optical fiber patch cord grinding. The grinding machine comprises a plurality of grinding machines arranged side by side, grinding stations and cleaning stations are arranged in the grinding machines, grinding devices and cleaning devices are installed on the grinding stations and the cleaning stations correspondingly, and the grinding machines comprise transferring devices used for moving grinding discs between the adjacent stations. The grinding machine is structurally characterized in that the grinding machine further comprises a glass disc replacing device used for replacing glass discs on the grinding device and the containing frame, the glass disc replacing device comprises a jacking air cylinder, a rotating motor, a clamping rotary arm and a glass disc clamping assembly, and the rotating motor is installed on the jacking air cylinder; the middle of the clamping rotary arm is installed on the rotary motor, and the two ends of the clamping rotary arm are each provided with a glass disc clamping assembly.