Devices, systems and methods for hanging one or more objects, such as frames, on a surface. A marking device for marking a surface for hanging one or more objects. The marking device can have a main body portion having first and second arms pivotably attached thereto. The first and second arms, as well as the main body, can each have a marker to mark a target surface. The marking device can optionally have a level indicator and the first and second arms can have markers which can slide along a ruled measure for convenient positioning of marks on the target surface. Optionally, the markers can have biased, retractable, or sheathed marker pins.

Devices, systems and methods for hanging one or more objects, such as frames, on a surface. A marking device for marking a surface for hanging one or more objects. The marking device can have a main body portion having first and second arms pivotably attached thereto. The first and second arms, as well as the main body, can each have a marker to mark a target surface. The marking device can optionally have a level indicator and the first and second arms can have markers which can slide along a ruled measure for convenient positioning of marks on the target surface. Optionally, the markers can have biased, retractable, or sheathed marker pins.

A method for applying a position marking for a working position to a substrate, for example a wall, a ceiling, a floor or the like, at a marking position assigned to it, comprising: a. unsystematically or systematically moving a portable marking system over a marking area of the substrate; b. determining at least one position of the marking system; c. marking at the determined position of the marking system, provided that the determined position coincides with the marking position or at least coincides with the marking position to a predefined or predefinable degree of accuracy. The invention also relates to a marking system.

The present invention relates to a rechargeable hydraulic punching machine for a cable tray, in which a battery, a grip, a motor, a hydraulic cylinder, a punch, and a die are sequentially disposed along a straight line, a C-shaped head coupled to the head of the hydraulic cylinder is disposed, the punch and the die are disposed at both open ends of the C-shaped head, respectively, punch guards are disposed on a portion of the head spaced apart from both sides of the punch, the battery is configured to be charged and detachably attached, the motor transfers power to the hydraulic cylinder by using the power of the battery, and the hydraulic cylinder punches assembly holes of a cable tray by pushing the punch in the direction of the die by using hydraulic power based on the power of the motor.

The present invention discloses a center line planning device, comprising a fixed support, a movable support, said movable support connected to said fixed support in a movable form, the head end of the first connecting rod hinged on the fixed support, the head end of the second connecting rod hinged on the movable support, the tail end of the first connecting rod and the tail end of the second connecting rod hinged together, the length of the first connecting rod equal to the length of the second connecting rod; the hinge position between the tail end of the first connecting rod and the tail end of the second connecting rod provided with a marking tool. The present invention utilizes the principle of coincident median and altitude in an isosceles triangle to design said center line planning device that facilitates workers to identify and confirm the center lines of axial parts, such as square tubes and round tubes, so as to pave the way for further processing of the raw materials.

The present invention discloses a center line planning device, comprising a fixed support, a movable support, said movable support connected to said fixed support in a movable form, the head end of the first connecting rod hinged on the fixed support, the head end of the second connecting rod hinged on the movable support, the tail end of the first connecting rod and the tail end of the second connecting rod hinged together, the length of the first connecting rod equal to the length of the second connecting rod; the hinge position between the tail end of the first connecting rod and the tail end of the second connecting rod provided with a marking tool. The present invention utilizes the principle of coincident median and altitude in an isosceles triangle to design said center line planning device that facilitates workers to identify and confirm the center lines of axial parts, such as square tubes and round tubes, so as to pave the way for further processing of the raw materials.

A construction laser includes a base. The base includes a flat bottom surface that can be disposed on a work surface. There is a laser projector secured to the base. The laser projector includes a laser generator. The laser projector projects a laser beam onto the work surface when the flat bottom surface is disposed on the work surface. The construction laser also includes a pin. The pin secured to the base and being pivotable about an axis relative to the base.

A construction laser includes a base. The base includes a flat bottom surface that can be disposed on a work surface. There is a laser projector secured to the base. The laser projector includes a laser generator. The laser projector projects a laser beam onto the work surface when the flat bottom surface is disposed on the work surface. The construction laser also includes a pin. The pin secured to the base and being pivotable about an axis relative to the base.

Method and device for marking a workpiece surface (2A) of a metal workpiece (2), in which a welding torch (3) comprising a welding wire electrode (4) is guided along the workpiece surface (2A) to be marked and meanwhile a wire end (4A) of the welding wire electrode (4) is moved towards and away from the work-piece surface (2A) to be marked, wherein an electric voltage (U) present at the welding wire electrode (4) and/or an electric current (I) flowing through the welding wire electrode (4) bring about electric sparks, which bring about material removal and/or material alteration at the workpiece surface (2A) of the metal workpiece (2) to mark the workpiece surface (2A).

A layout tool for scribing an arc includes an arm, a variable location pivot point arrangement on the arm, and a plurality of mark openings spaced from the pivot point arrangement. A position fixing member, such as a nail, is engaged with the pivot point arrangement to fix the position of the tool on a workpiece at a pivot point defined by the position fixing member. A marking instrument is engaged within one of the mark openings, and the tool is pivoted on the workpiece about the pivot point to make an arcuate mark on the workpiece at a radius defined by the location of the position fixing member relative to the mark opening within which the marking instrument is engaged. The tool may be a square, which is configured with two arms that extend away from each other at a predetermined angle.