8 results about "Chalk line" patented technology

A multi-angle variable cross-section pipe section outer wall datum line assignment method comprises the steps that a vertical pipe section is supported through a supporting tool, the pipe section and the supporting tool are fixed through a chain type tensioner, the chain type tensioner is rotated, the vertical pipe section is pulled to rotate on a support bearing, the vertical pipe section is stopped when rotating to a 90-degree datum point and a 270-degree datum point are in a horizontal state, and the vertical pipe section is fixed to the supporting tool. 90-degree datum lines and 270-degree datum lines are surveyed through the datum points by utilizing the total station, then another two datum lines are surveyed through the total station, and an operator can adjust the pitch angle of the eyepiece, observe different positions, needing to be scribed, of the pipe wall of the pipe section and adjust the definition of the eyepiece under the conditions that the eyepiece passes through the eyepiece and the vertical shaft is locked. And guiding a lineation person to draw points at a position coinciding with a vertical standard wire in the eyepiece, and drawing 0-degree and 180-degree position lines at different positions by points at different positions in a chalk line popping manner. The scribing method for the pipe with the multi-angle section in the inner diameter has the advantages that the used scribing process is simple, the scribing precision is high, and an operator does not need to move an instrument many times.

The utility model relates to the technical field of English teaching appliances, and discloses a blackboard scriber for English teaching, which comprises a blackboard body, a support frame is arranged on the left side of the front side of the blackboard body, the outer wall of the support frame is sleeved with a limiting block in a sliding manner, iron bars are fixedly embedded on two sides of the support frame, and the limiting block is arranged on the right side of the blackboard body. The device comprises a supporting frame, an iron bar, a limiting block, a sliding block, a limiting frame and a sliding groove are fixedly installed on the supporting frame, magnetic sheets are fixedly embedded in the two sides of the inner wall of the limiting block, the outer walls of the magnetic sheets are magnetically connected to one side of the iron bar, and a lineation fixing plate is fixedly installed on the right side of the limiting block. The supporting frame, the iron bar, the limiting block, the magnetic sheets, the lineation fixing plate, an installation barrel, chalk, the sliding block, the limiting frame and the sliding groove are matched; a teacher can conveniently adjust the height of the chalks during scribing, and the four chalks can be driven to horizontally move on the blackboard at the same time, so that four auxiliary lines for English writing are quickly scribed on the blackboard by using the four chalks, and the scribing efficiency is improved and the teaching time is prolonged by adopting the mode.

A fastener includes a body that defines an opening at one end of the body. The opening is defined by a first edge of the body, a second edge of the body, and a third edge of the body. The opening is configured to receive a chalk line. The fastener also includes a pin extending from the body, and a spacer at an end of the body opposite the opening. The spacer extends in the direction opposite the pin. A clip is at a distal end of the spacer from the body. The clip includes a pair of teeth.

A weighted chalk line device may include a main body. A plurality of angular markings may be arranged on a top side of the main body at angularly-spaced-apart intervals about a central point, and may provide a visible indication of a respective plurality of angular positions about the central point. A bottom side of the main body may stably rest on a flat surface, and a first end of the string may be secured to the main body. The weight of the weighted chalk line device may maintain the first end of the string in a fixed position relative to the flat surface. The string may extend from the main body in taut condition and radially outward from the central point, and may be aligned with a selected angular marking providing a visible indication of the angular position of the string about the central point.

1. Name of the product in this design: Powder Thread Box (Convenient Version). 2. Application of this design: This design is used for the chalk line box of a woodworking marking and chalking tool. 3. The key design features of this product are the combination of shape and pattern. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application discloses a kind of caterpillar type lime powder line marking construction equipment and its construction method, comprising: shell, caterpillar walking unit being arranged in the lower part of shell, lime powder storage unit is placed in the left side of shell, lime powder discharge unit is arranged in the bottom of lime powder storage unit, electronic control system unit is arranged in the right side of shell, positioner is arranged in construction site path planning node;By setting caterpillar walking part, the uneven road terrain can be well adapted in the equipment walking process, and the stable operation of the equipment is effectively realized;In addition, by setting lime powder discharge unit in the bottom of lime powder storage unit, the technical problem that lime powder agglomeration is stuck in leakage hole is solved to some extent by using vibration reciprocating mechanism, in addition, the application is based on wireless positioning driving and automatic advancing line marking execution mechanism, which greatly improves the convenience of line marking construction process, effectively solves the technical problem that line marking construction efficiency is low due to the length of measuring scale or the limitation of construction environment in on-site construction.

In the construction of a building at least part of the information about the fabrication of the building, including what construction elements are to be used in the building and their location for carrying out said construction, is input in a computer software program to generate a plurality of marking information; said marking information is printed on a tape or strap, e.g. using a CNC printing machinery and the printed tape or strap is affixed or connected to a corresponding construction component to be used in said building. The markings may include the position of at least one of: beginning and / or end of a construction element; a cutting location for the cutting of a construction element; an anchor holder; nails or bolts for positioning string lines; plumbing drains; pipes; window assemblies; door headers; studs, posts and cripple studs; joists or rafters; chalk lines; plywood sheating.

A chalk-line layout anchoring device is provided. The device is comprised of a portable and stable tool for single-user layout operations in construction environments, comprising a planar weighted base for resisting chalk line tension, and equipped with a mounting structure for optional fastening. The base features a non-slip bottom surface for adherence to various substrates, a handle with an ergonomically designed grip area for repositioning, and multiple receiving points along its side configured to secure chalk line hooks at common framing intervals marked with visible alphanumeric indicators. Additional components may include a tape measure retention structure facilitating accurate solo measurements and alignment aids such as bubble levels or laser modules to support precision in layout orientation.