639 results about "Short arms" patented technology

An apparatus and method for performing optical coherence domain reflectometry. The apparatus preferably includes a single output light source to illuminate a sample with a probe beam and to provide a reference beam. The reference beam is routed into a long arm of an interferometer by a polarizing beamsplitter. A reflected beam is collected from the sample. A 90.degree. double pass polarization rotation element located between the light source and the sample renders the polarizations of the probe beam and reflected beam orthogonal. The polarizing beamsplitter routes the reflected beam into a short arm of the interferometer. The interferometer combines the reference beam and the reflected beam such that coherent interference occurs between the beams. The apparatus ensures that all of the reflected beam contributes to the interference, resulting in a high signal to noise ratio.

A padlock that can be unlocked by the owner of the padlock by dialing an unlocking number or by authorized security personals with a general key. The padlock mainly contains a lock body, a shackle, a private locking means and a general locking means. The lock body has a first chamber and a second chamber therein. The lock body has a receptacle thereon and a hole communicable to the first chamber. The shackle has a longer arm and shorter arm. The longer arm is slidably received in the first chamber through the hole of the lock body. The longer arm has a stop at an end thereof and the shorter arm is engagable with the receptacle of the block. The private locking means is formed in the first chamber. The private locking means contains a frame and mechanism. The frame has a sliding space therein. The frame has a first opening on top thereof for receiving the end and the stop of the longer arm in the sliding space. The mechanism is used for controlling movements of the frame. The frame is movable between the mechanism and the hole of the lock body. The general locking means is installed in the second chamber for controlling movements of the end and the stop of sad longer arm.

A slider is provided on a rear door so as to be able to freely reciprocated, and the slider is connected to a vehicle body through a control arm and a driven arm. A linear cam groove and a curved cam groove continuous to the linear cam groove are formed in a guide plate fixed to the rear door. A control arm that controls an operation of the rear door includes a proximal portion rotatably attached to the slider and a pair of arm portions continuous to the proximal portion. The longer arm portion is attached to the vehicle body whereas the shorter arm portion is guided by the cam grooves. A projection amount of the rear door can be thereby set larger than a curve amount of the curved cam groove. In addition, a width of the guide plate can be thereby reduced. Therefore, the guide plate can be attached not to the vehicle body but to the rear door.

A fastener clip includes a base plate and a pair of laterally offset arms extending from the base plate. The fastener clip is operative for insertion into a hole (slot) defined in a first engagement structure, such as a vehicle chassis. At least four wings extend from the arms. Each wing includes at least one engagement portion including a depressed portion formed on each wing, wherein each depressed portion is operative to engage a portion of the hole. According to one embodiment, each arm is coupled to at least one wing at a distal end of each arm (i.e., a long arm), so that each wing extends inwardly towards the base plate. According to an alternative embodiment, each arm (i.e., a short arm) is coupled to the at least one wing, so that each wing extends outwardly away from the base plate.

The invention discloses a cement telegraph pole erecting cart comprising a frame, a telegraph pole lifting device and a telegraph pole support device. The telegraph pole lifting device and the telegraph pole support device are arranged on the frame, the front end of the frame is provided with a shaft bush, a connecting rod is arranged on the frame, and one end of the connecting rod is connected with a first snap ring. The telegraph pole support device comprises groove steel and sliding rails on the upper surface of the groove steel, the groove steel is provided with a slide groove, and a pin shaft is penetratingly arranged on the groove steel and provided with a wheel. The end of the slide rails is provided with a second snap ring used for restraining a cement telegraph pole. The telegraph pole lifting device comprises a lifting oil cylinder, a central shaft and a connecting lever on the frame, the connecting lever is movably connected on the central shaft and comprises a short arm and a long arm, the short arm is movably connected with a cylinder rod of the lifting oil cylinder, and the long arm is connected with the pin shaft. The central shaft is connected with the shaft bush through a support rod. The telegraph pole lifting device comprises the connecting lever and the lifting oil cylinder, lifting is realized by the lever principle, operation is quite convenient and time and labor saving, and operation efficiency is greatly improved.

An inexpensive, endo-tracheal intubation device suitable for single patient use by emergency health care workers, which comprises a stylet having a tube which is scored in such a way that it can be bent using a wire encased in the tube. The wire is attached to both the stylet's end distal from a stylet-holder and to the short arm of a bell crank pivotally mounted in the holder. Grasping the stylet holder in one hand, the operator can move the bell crank's trigger arm with his finger(s), thereby causing the stylet to bend in a controlled manner. In use, a conventional airway tube is mounted on the stylet holder so as to encase the portion of the stylet which protrudes outwardly therefrom. A light on the stylet's tip allows visualization of the patient's vocal cords. After the user gently pushes the airway tube/stylet combination between them, the stylet is then removed for ventilation.

The present invention provides a vehicle carrying device for a stereo garage, belongs to the technical field of load-carrying machinery, and relates to a vehicle access device for a stereo garage. Clamping, fixing and longitudinal and transverse movement of vehicles when the vehicles are accessed in the stereo garage can be effectively achieved. The vehicle carrying device comprises a bottom self-moving mechanism and wheel clamping mechanisms; two ends of a under frame are respectively provided with a pair of travelling wheels with power; two tracks are laid at two sides of the concave bottom of the under frame; two sets of wheel clamping mechanisms are disposed on the concave of the under frame; two sets of symmetrically arranged wheel clamping mechanisms are disposed on chassis of the wheel clamping mechanisms; tow sides of each chassis are provided with clamping motors with output shafts downward; driving chain wheels disposed below each chassis are fixed to output shafts of the clamping motors and are linked to driven chain wheels through chains; a roller is fixed to short arms at an inner side of a clamping arm through shafts at two ends; one end of a clamping connecting rod joint is hinged to the central section of the outside of each clamping arm; and cantilevers at two sides of each chassis are provided with travelling wheels coaxial with the driven chain wheels. The vehicle carrying device is mainly sued in a stereo parking garage.

A connector of upper contact type for an FPC comprising a cover housing constituted of synthetic resin alone. The housing includes first contacts and second contacts alternately arranged in parallel on a line. Each of the first contacts has an elastic arm coming into contact with an upper contact point of FPC when the cover housing is closed. On the other hand, each of the second contacts has a tuning-fork-shaped contact constituted of a pair of a short arm and a long arm, the short arm coming into contact with the upper contact point of the FPC so that the tuning-fork-shaped contact may exert a coupled force on the FPC when the cover housing is closed. With such a configuration, this connector reduces deformation of the cover housing while eliminating use of any reinforcing metal member in the cover housing.

The invention relates to the technical field of coal mine mining, in particular to a non-coal-pillar auto-roadway-forming mining method suitable for thick-seam fully mechanized top coal caving. The method includes the following steps that reinforcing and supporting are carried out on a roof and two walls of a roadway; roof cutting explosion is carried out to form a pre-cracking seam; a temporary supporting device in the roadway and a gangue blocking device are erected along a retained entry; coal caving is not performed within a preset distance to the working face end close to the entry retaining side; after the roadway is stabilized, the temporary supporting device in the roadway is removed, a goaf is closed, and the entry retaining is completed. The roof cutting explosion better facilitates collapsing of the rock stratum in the goaf, the stoping space can be well filled after the rock stratum in the seam is collapsed, a short arm beam structure is formed in the lateral direction of the entry-retaining roof, a long suspended roof formed in the goaf is avoided, and the surrounding rock stress of the gob-side entry is improved; coal caving is not performed within a certain range ofthe working face end of the entry retaining side, the filling effect of the empty area of the entry retaining side is further guaranteed, rotary sinking of basic top block bodies is effectively limited, and the influence on the entry retaining stability is greatly reduced.

The invention discloses a device for opening and closing a back door of a rubbish bin, which belongs to the technical field of rubbish storage and transportation devices. The device for opening and closing the back door of the rubbish bin comprises a carriage, wherein the back end of the carriage is provided with a back door frame; the back door is arranged in and matched with the back door frame; the matching face with the back door on the back door frame is provided with a gasket; the upper part of the back door is rotatably connected with the carriage through a connecting hinge pin; both sides of the upper part of the back door is provided with a straight groove backwards and downwards; the connecting hinge pin is inserted into the straight groove; both sides of the carriage are hinged with a two-way hydraulic oil cylinder respectively; the extension end of a piston rod of the two-way hydraulic oil cylinder is hinged with the end part of a long arm of an L-shaped locking arm; a short arm of the locking arm is inserted between a closing limited hinge pin and an opening limited hinge pin arranged on the back door; and the middle part of the locking arm is hinged with the back door frame. The two-way hydraulic oil cylinder can drive the locking arm to rotate to open or close the back door; and the back door has flexible opening and closing, capability of remote control, reliable use and good sealing performance without leakage in the process of transportation, and can be used for treating urban rubbish.

The invention discloses a boom device of a concrete pump truck, comprising multi-section booms which are mutually hinged. Any one boom rotates relative to adjacent booms under the action of a drive part. The boom device also comprises at least a short arm (1) which is hinged at the tail end of the last boom by a first hinged shaft (2). A first power part is installed between the short arm (1) and the last boom. The short arm (1) rotates around the first hinged shaft (2) relative to the last boom under the action of the first power part, so that when folded, the short arm (1) is arranged below the last boom, and the included angle formed by the axis of the short arm (1) and the vertical plane is not more than 45 degrees. Therefore, the height and the length of the folded boom device are effectively reduced. The invention also discloses a concrete pump truck utilizing the boom device.

The invention relates to a broadband online measurement sensor for DC extra-high voltage corona current, which comprises an isolation electrode unit, a signal processing unit and a system power supply unit, wherein the isolation electrode unit comprises an insulated isolation sleeve, a hollow tubular long arm low-voltage electrode and a hollow tubular short arm high-voltage electrode, wherein two ends of the insulated isolation sleeve are respectively in security isolation connection with the high-voltage electrode and the low-voltage electrode in a special way; the signal processing unit consists of a sampling resistor module, a signal acquisition module, a signal conversion module and a signal transmission module; the system power supply unit comprises a storage battery pack and a charging module; and the signal processing unit and the system power supply unit are arranged in the isolation electrode unit, so that the high-accuracy integral measurement sensor can be formed. The broadband online measurement sensor solves the problems of shielding disturbance of a strong electric field between an acquired signal and an acquisition channel as well as surrounding stray capacitance, and realizes the broadband domain online measurement and the multi-point network online measurement of the DC extra-high voltage corona current.

A universal substrate holder of the invention for treating wafer substrates in liquids is provided with a shaft and a rod slidingly inserted into the central opening of the shaft. The end of the shaft that protrudes into the bowl supports a base platform for the substrate, while the end of the rod that protrudes into the bowl has radial arms that rigidly support an annular plate with pins that can pass through the opening of the base platform so that they can support the substrate above the surface of the platform. The annular plate supports clamping jaws made in the form of two-arm levers with shorter arms and longer arms. The longer arms are heavier and therefore in the stationary state of the holder keep the jaws turned into an open position. When the shaft begins to rotate, the jaws are turned under the effect of centrifugal forces into positions of clamping the substrate with the shorter arms. When the rod is pulled down, the ends of the longer arms come into contact with the base platform and are turned into the clamping position. The substrate holder of the invention allows clamping and releasing of the substrate in positions of the substrate above the platform and in a position of the substrate on the base substrate, when the backside of the substrate is inaccessible to the process liquid.

The invention relates to a novel Mars rover which is mainly used to solve the problem that after the wheel surface is damaged, there is no way to repair and adjust an opening angle mechanism to make the Mars rover complete a series of movements. According to the novel Mars rover, wheels and master arm suspensions are symmetrically distributed on both sides of a vehicle main body, and each wheel isformed by an axle, a base and wheel pieces. The wheel pieces are spliced one by one and made of spaceflight rubber. If some wheel pieces are abraded, the damaged wheel pieces can be dismantled in a splicing mode and replaced with new ones. Each master arm suspension is composed of a main rocker arm and an auxiliary rocker arm on the two sides and a differential mechanism. The main rocker arm andthe auxiliary rocker arm are hinged to each other, a clutch is added at the position of a hinged point, the main rocker arm is formed by a main rocker arm long arm and a main rocker arm short arm, andan opening angle adjusting mechanism is arranged between the main rocker arm long arm and the main rocker arm short arm. When a clutch does not work or in a locked state, the folding and unfolding, wriggle and wheel lifting movements of the Mars rover are controlled by adjusting the opening angle mechanism. The novel Mars rover is used for scientific detection on the surface of Mars.

The invention discloses a polarization-independent phase encoding quantum key distribution system and method. A sending end comprises a pulse laser, an intensity modulator, an optical fiber isolator,a phase encoding unit and an electrically adjustable attenuator which are connected in sequence. A receiving end comprises an optical fiber circulator, a phase decoding unit, a first single photon detector and a second single photon detector. The phase decoding unit is composed of an unequal-arm Mch (Zehnder) interferometer and a Sagnac ring. Compared with the prior art, polarization changes of along arm and a short arm of an MZ interferometer can be automatically compensated, and polarization consistency of two paths of pulses passing through the long arm and the short arm is ensured so thatchannel polarization disturbance resistance is realized. The requirement on the voltage amplitude of the phase modulator is low. Due to the introduction of the Sagnac ring, two polarization components of one optical pulse respectively pass through the phase modulator from opposite directions, equivalently, the whole optical pulse is only subjected to phase modulation once, so that insertion lossis small, working rate of the system is not limited by the structure and can reach more than GHz, and key productivity is greatly improved.

The invention provides a micro force measuring device, belongs to the technical field of micro force value calibration and measurement testing, and aims to solve the problems that the structure is complex, the action line of the force cannot be fixed easily, and the cost is high in the prior art. The micro force measuring device comprises an unequal arm balance, a force value replication device, a micro-displacement measuring device and a computer control system, wherein a tray is arranged at a long arm end part of the unequal arm balance; an edge cutter structure is arranged at a short arm end part; the edge cutter structure is connected with the micro-displacement measuring device through the force value replication device; the output end of the micro-displacement measuring device is connected with an insulating rod through a connecting sleeve; and the insulating rod is connected with a threaded hole in an upper end cover of an inner electrode of the force value replication device. According to the micro force measuring device, the force value replication device is used for replicating a micro force value, relative micro displacement of the inner electrode is measured through an improved digital display micrometer, the force value change is changed into the precision capacitance gradient change of an electricity quantity relative to the displacement, balance is formed through a lever structure and a standard weight dead weight force, the structure is simple, and the cost is lower.

The invention relates to an L-beam piezoresistance type micro-accelerometer and a production method thereof, the micro-accelerometer comprises a supporting main framework body, an elastic beam, a weight block, cover plates and so on, which is characterized in that the elastic beam is shaped like L, a long arm of the L-shaped elastic beam is connected with a side frame of the supporting main framework body, the weight block is suspended in the middle of a supporting side frame body by the support of the L-shaped elastic beam, a short arm of the L-shaped elastic beam is connected with the top angle of the upper surface of the weight block; the upper and the lower surfaces of the supporting main framework body are bonded with the cover plates; the root part and the top end of the long arm of the L-shaped beam are respectively provided with a piezoresistor, and the two piezoresistors with the same resistance on the L-shaped beam constitute a bridge with the unilateral strain of a Wheatstone bridge. The micro-electron mechanical processing technology is adopted as the key production technology. The L-beam piezoresistance type micro-accelerometer can solve the problem that the existing piezoresistance type micro-accelerometer can not simultaneously meet the requirements of high sensitivity, small volume, low cost, small cross-interference and easy processing.

A network camera holder includes an L-shaped holder provided along its central line an L-shaped slot; the holder comprised of a longer arm and a shorter arm; the longer arm having a concaved surface and the longer arm having a flushed surface; a retainer and a flange being respectively disposed on the inner side of the front end of the shorter arm and the longer arm; a screw hole being disposed on the lower end of the camera; a bolt passing through the L-shaped slot and locked in the screw hole; by loosening up the bolt to allow the camera to slide within the L-shaped slot to a proper location before being tightened up; when the camera being secured to the shorter arm, the camera being hooked to an upper edge of a monitor by the retainer while the flange from the longer arm holding against the back of a monitor; and when the camera being secured to the longer arm, the camera being placed on a desktop by the flushed surface of the longer arm.

The invention relates to a turnover device of large components, which is composed of at least two sets of side by side turnover mechanism. The turnover mechanism is composed of an L-shaped bearing revolving body with short arms and long arms; the long arms are provided with revolving hinge and the bearing revolving body is articulated with a fixed hinged bearing via the revolving hinge; the long arms are also articulated with a piston rod of a lift cylinder; the other end of the lift cylinder is articulated with a hydraulic hinged bearing and the lift cylinder is connected with a hydraulic control device via pipelines. Compared with the prior art the invention has the advantages of being easy in operation, safe and reliable, low in equipment cost and convenient maintenance, which can realize the turnover of large components without damage.