157results about "Straightedges" patented technology

The utility model relates to the technical field of math teaching aids, and discloses a multifunctional math teaching aid ruler, which comprises a ruler, a groove arranged on the ruler and a moving structure arranged in the groove in a sliding manner, the ruler is provided with scale marks which are oppositely arranged, the moving structure comprises a moving plate positioned in the groove, and the moving plate is arranged in the groove. Sliding blocks are fixedly connected to the two sides of the movable plate, sliding grooves matched with the sliding blocks are formed in the two sides of the groove in the ruler, limiting structures used for fixing the positions of the sliding blocks in the sliding grooves are arranged on the ruler, a positioning cavity matched with chalk is formed in the movable plate, a through groove is formed in one side of the positioning cavity in the movable plate, and the through groove is communicated with the through groove. A clamping block used for fixing the chalk in the positioning cavity is arranged in the through groove in a sliding mode, a rubber sleeve is arranged at one end of the ruler, and a centering needle capable of penetrating through the ruler is arranged in an inner cavity of the rubber sleeve. Compared with the prior art, the teaching aid has the advantages that circles and circles with certain diameters can be drawn conveniently, and teaching aids do not need to be used alternately.

[Problem] To provide a tool configured to allow for easy installation of equipment on a wall surface by directly providing four holes on the wall without requiring a horizontal member on the wall surface when installing the equipment on the wall surface. [Solution] The present invention pertains to an installation positioning tool for mounting equipment onto a wall surface. The tool comprises a weft frame, and first and second warp frames. The weft frame has a rail configured to be able to slidably guide the first warp frame from one end to the other end of the weft frame and fix the same, and is configured to be able to fix the second warp frame to the other end. The first and second warp frames each have, in upper and lower parts thereof, perforations for marking the wall surface at the same positions.

The utility model provides a measuring scale for architectural design, which solves the problem that the accuracy is low when the conventional measuring scale is used for drawing parallel lines and marking point positions, and comprises a main scale and an auxiliary scale, short edges at two ends of the main ruler are in sliding connection with short edges at two ends of the auxiliary ruler, and the sliding direction of the main ruler is parallel to the short edges of the main ruler; one long edge and one short edge of the main ruler are provided with edge scale marks, and the other long edge of the main ruler is overlapped with the auxiliary ruler up and down; a sliding groove is formed in the main ruler in the length direction of the long side, and at least one positioning pointer is connected to the sliding groove in a sliding mode. The measuring tool is widely applied to the technical field of measuring tools.

The utility model provides a folding ruler plate, which relates to the technical field of folding ruler plates and comprises a folding ruler body. The folding ruler body is provided with a major arc angle measuring plate, a vertically-through round-corner square hole is formed in the rear portion of the middle of the major arc angle measuring plate, angle measuring lines are arranged on the periphery of the top end face of the major arc angle measuring plate, and a vertically-through fixing screw hole is formed in the left side of the round-corner square hole of the major arc angle measuring plate. The left side of the fixing screw hole of the major arc angle measuring plate is provided with a locking screw hole penetrating up and down, the top of the interior of the fixing screw hole of the major arc angle measuring plate is provided with an included angle fixing button in the vertical direction, the included angle fixing button is conveniently installed on the major arc angle measuring plate through threads, and the included angle fixing button is conveniently engaged and descended through threads to abut against the rotating measuring scale plate to achieve angle fixing. The problems that an included angle formed by a folding ruler plate needs to be pressed and fixed by a hand, displacement is easily generated during line drawing, and fixing measures are inconvenient to add on the folding ruler plate to fix the included angle formed by the folding ruler plate are solved.

A birdsmouth jig includes a base having an inside edge, a square having a first leg with a first outside edge and a second leg with a second outside edge meeting at and defining a corner, wherein the square is mounted to the base for sliding movement along the base.

A combination square is provided with a square head that includes a pair of bores extending through a blade receiving slot, a pair of pins, each pin having an eccentric outermost surface and being engaged in a corresponding one of the bores, and a ruled blade that is releasably engaged in the slot such that the relative angle between the head and the blade can be adjusted by rotating one or both of the pins about the axis of the corresponding bore.

The utility model relates to the technical field of measuring scales, and particularly discloses a multifunctional measuring scale, which comprises a measuring scale; the disc mechanism is arranged at the top end of the measuring scale; the abutting block is arranged on the outer side wall of the top end of the disc mechanism, a graduated scale is arranged on the outer side wall of the disc mechanism, a #-shaped grid ruler is arranged on the surface of the top end of the measuring scale, a coordinate ladder ruler is arranged on the surface of the top end of the measuring scale, and a trapezoidal ruler is arranged at the top end of the disc mechanism; according to the utility model, through the arrangement of the mounting groove, the abutting block and the calibrated scale, the design of the #-shaped ruler, the coordinate ladder ruler and the trapezoidal ruler enables the measuring scale to have multiple measuring functions, and meanwhile, the dense value ruler can be detached outside the measuring scale, so that the dense value ruler can be inserted and fixed in the abutting block; by means of the design, accurate auxiliary aiming during drawing and measuring is achieved, and the functionality of the measuring scale is remarkably improved.