32results about How to "Elevation is accurate" patented technology

A gun sight base which is designed to allow the user to quickly adjust the elevation of the attached gun sight as a means to affect the trajectory of a projectile discharged from the host firearm. Provided is a removable, pre-calibrated adjustment cam which is in operational contact with the attached gun sight. A distance indicator is visible to the user to allow for rapid elevation adjustments without the need for tools.

An intersection adapted for engagement with a toy racetrack to provide an combination jump and overcrossing intersection for vehicles traversing the racetrack. The device features first and second supports engageable with inline pairs of track thereby forming two pathways across a jump formed by a gap in the middle of the device. The first support is in a translatable engagement with the second support between a first position where vehicles crossing the gap at the same time would collide and a second position forming a second path where vehicles jumping the gap are on different trajectories.

A laser alignment device for a drill rig having an elongate drill rod, the laser alignment device including a head unit having at least a pair of laser emitting devices mounted independently to one another thereon, each of the laser devices movable in one plane only and oriented in substantially opposite directions to one another, an attachment means to attach the head unit to a drill rig and a length adjustable assembly to adjust the separation distance between the head unit and the drill rod, wherein the alignment device is used to align at least the azimuth of the drill rod relative to survey marks.

An antenna assembly including a support and antenna tiles disposed in the support. The antenna tiles form an external surface corresponding substantially in shape to lateral faces of a frustum. The frustum includes a central axis with the antenna tiles disposed around the central axis of the frustum and sloping away therefrom. Each antenna tile includes opposite ends, with one end narrower than the other end. A planar array of antenna elements is disposed on each antenna tile in which the antenna elements of each array are configured to operate as a phased array. A control system connects to the planar arrays of antenna elements in which the control system is configured to selectively activate and deactivate each of the planar arrays.

In an image scanning apparatus, documents on a document tray are transferred one by one, and an upper surface height of the documents is lowered to turn off a height detection sensor. Different kinds of control modes are performed according to a document scanning mode. In an image-quality-priority scanning mode, a transfer unit suspends transfer of the document, the document tray is elevated until the upper surface height reaches a target height that is higher by a predetermined distance after the height detection sensor is turned on, and the transfer unit resumes the transfer of the document. In a speed-priority scanning mode, while the transfer of the document is continued by the transfer unit, the document tray is elevated until the document tray reaches the target height.

The invention discloses a cantilever pouring system of a long-span railway reinforced concrete arch bridge. The system is characterized in that the embedded structure comprises a main arch abutment foundation (1), an approach bridge abutment (2) and a side pier foundation (3), and the large-temporary engineering structure comprises a back cable anchor spindle (4), a support (6) and a buckling tower (15); The buckle cable structure comprises a temporary buckle cable (11) and a back cable (12). The auxiliary tower crane assembly comprises a first tower crane (5) and a second tower crane (17), wherein the auxiliary tower crane assembly relays reinforcement cages (9) of each segment to be in place, thereby effectively solving the technical problem of constructing a long-span railway concrete arch bridge under the site condition that temporary supports cannot be installed. A long-span railway reinforce concrete arch bridge cantilever pouring construction method is also provide, which greatly increases construction efficiency compared with that traditional construction method and saves cable and part of ground anchor cost. The invention also provides a large-span railway reinforced concrete arch bridge cantilever pouring construction method.

The invention comprises a plurality of steel framing members that are permanently or semi-permanently affixed to one another to create an integral frame that does not have to be completely recreated to perform successive home movements on different sized homes and has sufficient structural integrity and dynamic load support systems to transport a house without causing cracking and breakage of brittle finishes. Multi-tire transportation assemblies support the frame on its bottom side. An integral system of hydraulic jacks that have bending moment capability are affixed to the integral frame to allow the integral frame to be elevated and lowered while remaining stable so that the multi-tire transportation assemblies can either be spun or removed, the integral frame can be leveled, or the integral frame can be elevated and lowered to the required elevation of a foundation or the dock of the manufacturing facility that produces standard size houses.

The invention relates to a simple device for assembling a pressure steel pipe stiffening ring. An upright and a supporting panel are welded together; the supporting panel and a rail fixed frame are connected into a whole in a welding manner; rails are fixed on the supporting panel by the rail fixed frame; one ends of lateral pull plates are sleeved on the rails; the other ends of the lateral pull plates are pressed against the inner wall of a steel pipe body in the working process; sleeves and the supporting panel are connected into a whole in a welding manner; springs are placed in the sleeves to take a supporting effect on the rails; and jacks are placed on the rails and are not connected with the rails. The device is simple to install and is convenient to use; assembling quality of the steel pipe stiffening ring and quality of the surface of the pipe wall are effectively controlled; auxiliary workload of steel pipe manufacturing is greatly reduced; production efficiency is improved; cost is reduced; the simple device is easy to disassemble; elevation and flatness are accurate to control; and the simple device can be repeatedly used.

The invention discloses a construction method for a test pile with ultra-buried depth in a rock stratum, and belongs to the field of test pile construction. The technical problems that holes in a complex rock stratum are difficult to form, the underwater concrete ultra-pouring elevation cannot be accurately controlled, the static load detection operation conditions of the bottom of an ultra-deep foundation pit are limited, and the bearing detection is influenced by the control friction resistance for a cast-in-place pile are solved. According to the technical scheme, the method comprises the following steps that S1, construction preparation is carried out; S2, advanced drilling exploration is carried out, and a rock surface BIM model is established; S3, a protective cylinder is positionedand buried, and manufacturing and placing of double sleeves of the test pile are carried out; S4, a drilling machine is in place, and the centering and perpendicularity adjustment of a drill rod are carried out; S5, soil layer drilling, wall protection and rock stratum multi-stage step type drilling are carried out; S6, the perpendicularity of the drill rod is monitored by utilizing an internal and external double-control method; S7, a steel reinforcement cage is manufactured and an anti-floating structure is installed according to the step 2, the steel reinforcement cage is hoisted and placed, and an ultra-pouring monitoring probe is installed; S8, a guide pipe is placed, and secondary hole cleaning is carried out by adopting a gas lift reverse circulation method; and S9, underwater concrete pouring and ultra-pouring height monitoring are carried out.

The invention belongs to the technical field of bridge engineering, and particularly relates to a convenient height-adjusting intelligent monitoring support which comprises a support body, a support upper steel plate arranged at the top and a support lower steel plate arranged at the bottom. The adjusting piece is located below the support body; the adjusting part comprises an upper adjusting steel plate and a lower adjusting steel plate which are arranged at intervals up and down, and a wedge-shaped part positioned between the upper adjusting steel plate and the lower adjusting steel plate; the wedge-shaped piece comprises two wedge-shaped adjusting blocks which are symmetrically arranged, an adjusting pull rod and a locking nut; the intelligent monitoring piece comprises a force measuring device, a data acquisition instrument and a computer terminal. According to the bridge height adjusting support, the problems existing in an existing bridge height adjusting support are solved, a plurality of components such as the support body, the adjusting piece and the intelligent monitoring piece are designed, and the multiple components are matched with one another, so that the height of a bridge can be conveniently adjusted, and the bridge can be remotely monitored in real time on line.

A plastering slide track device for surface finishing when pouring a concrete bottom plate in a hole consists of steel pipe slide track, an angle steel support, screw stems, nuts and bottom plate top reinforcements. The steel pipe slide track is placed on the angle steel support, the lower end of the angle steel support is welded with the screw stems, the nuts are welded on the bottom plate top reinforcements, and the screw stems are screwed into the nuts. After the plastering slide track device is fixedly mounted on a concrete bottom plate to be poured, pouring elevation and surface evenness of the concrete bottom plate can be conveniently and accurately controlled by means of adjusting the heights of the screw stems, and an operator utilizes the device to primarily level out the surface of the concrete bottom plate. Before concrete is set initially, surface finishing and artificial pressure polishing of the concrete bottom plate are finished via a compacting machine. The plastering slide track device is simple in installation, convenient in use, easy in detachment and accurate in elevation and evenness control, and can be reused.