The present disclosure relates to a screw-retaining device (1) comprising a connecting element (2) which in turn comprises a first end part (3), a second end part (4) and an intermediate part (5) that connects the end parts (3, 4). The first end part (3) comprises an at least mainly circumferentially running part (6) that at least partly encompasses a retaining aperture (7) that is arranged to engage the threads (9) of a screw (100), and the second end part (4) is attached to an object (8). The screw-retaining device (1) further comprises a washer part (20) with a first and second washer portion (21, 22), having a corresponding first and second washer aperture (23, 24). The washer portions (20, 22) are connected and spaced apart by a gap (26), and the washer apertures (23, 24) admit passage of a screw stem (19). The first end part (3) is arranged to be positioned in the gap (26) before a screw (100) that is intended to be retained is mounted to the screw-retaining device (1) via the retaining aperture (7) and the washer apertures (23, 24). The present disclosure also relates to a screw-retaining kit.

A saw blade for a sawing machine for cutting micro trenches for receiving at least one duct or cable. The saw blade includes coding elements such as holes, depressions or protrusions. The holes, depressions or protrusions form at least one code symbol representing a unique identity (ID) for the saw blade.

A device for cutting a workpiece along a cutting line between a first end point and a second end point including a saw head, comprising an advancing mechanism with a guide carriage and with an advancing motor. The saw head is arranged on the guide carriage movable along an advancing direction, including a sensor system with a sensor element for monitoring the saw head, the advancing mechanism or the work process, including a control unit with a control element to control the saw head, the advancing mechanism and the sensor system as well as an evaluation element to evaluate a measured quantity detected by the sensor system, including an operating device to operate the saw head and the advancing mechanism, and including a display. On the basis of the measured quantity, the control unit calculates the momentary work result which is shown on the display.

A method to control a power tool (1), especially a handheld core drilling machine, includes a drive (10) to drive a tool (30) and a control unit (40) for when a workpiece (W) is being processed. The method encompasses the following method steps: setting the rotational speed of the drive at a first value; measuring a first power consumption value for the drive; setting a threshold value for the power consumption of the drive; and increasing the rotational speed of the drive to a second value if the power consumption of the drive (10) exceeds the threshold value due to an increase in the drive load. The power tool includes a drive (10) to drive a tool (3) and a control unit (40) to control at least the rotational speed of the drive.

A laser assisted tile cutting device consists of a base section, cutting unit, a laser beam emitting unit, a pair of guide rails, a sliding mechanism, a first mounting pad, and a second mounting pad. The first mounting pad and the second mounting pad, which are aligned parallel to each other, are perpendicularly mounted onto the base section. The pair of guide rails extend from the first mounting pad to the second mounting pad. The cutting unit is slidably positioned along the pair of guide rails via the sliding mechanism. The laser beam emitting unit generates a guided path for the cutting unit to follow. By following the guided path, accurate linear cuts and angular cuts can be obtained.

A communicator in one aspect of the present disclosure includes a connector, a communication circuit, and a communication controller. The connector is electrically coupled to an electric working machine. The communication circuit performs wireless communication. The communication controller cyclically transmits operational information without specifying a recipient via the communication circuit in response to an operating mode of the communication controller being set to an operation-transmission mode. The operational information indicates an operating state of the electric working machine.

A communicator in one aspect of the present disclosure includes a connector, a communication circuit, and a communication controller. The connector is electrically coupled to an electric working machine. The communication circuit performs wireless communication. The communication controller cyclically transmits operational information without specifying a recipient via the communication circuit in response to an operating mode of the communication controller being set to an operation-transmission mode. The operational information indicates an operating state of the electric working machine.

A method for placing at least one duct/communication cable below a road surface in an area. The area comprises a first layer and a second layer, the first layer being a road layer, such as asphalt or concrete, and the second layer being a bearing layer for the first layer and being located below the first layer. The method comprising the steps of cutting a micro trench in the area through the first layer into the second layer, placing at least one duct/communication cable in the micro trench so that that duct/communication cable is placed below the first layer, and filling the micro trench so as to restore the road surface.

Disclosed is a machine for forming saw cuts into sidewalk concrete slabs, the machine comprising a frame, rubber tracks attached to the underside of the frame to self-propel the machine in a travel direction along a sidewalk during use, and a cutting assembly mounted to the frame. The cutting assembly comprises a saw for forming saw cuts, a linear actuator for moving the saw at a depth into the sidewalk, and a screw drive motor to move the saw to form the saw cut in a direction perpendicular to the travel direction. While road repair machinery has the luxury of more space, machines for sidewalks are smaller and tighter. The machine in accordance with the teachings of this invention uses a newly designed cutting assembly to keep the size of the machine useable for sawcuts in sidewalks.

A spectacle lens processing device includes a drilling tool and a processor. The processor acquires a position of a hole formed in a lens and a pantoscopic angle. The pantoscopic angle is an angle in a vertical plane between a visual axis of a user and an optical axis of the lens when the user wears spectacles in which the lens after processing is mounted and faces forward. The processor determines, based on the acquired pantoscopic angle, a relative angle between the drilling tool and the lens when the hole is formed in the lens in the position of the hole.