Abstract: The present invention is applicable to the technical field of decoration tools and provides a chisel. The chisel comprises a housing; a first guide device arranged in the housing; and a cam mechanism disposed in the housing, wherein the cam mechanism comprises a first end cam and a second end cam which are fixedly connected together and have cam end faces opposite to each other, a connecting device connected with a power device is arranged on one side, opposite to the cam end face, of the first end cam, and the second end cam is a hollow cam; a hollow portion capable of passing through the second end cam, wherein the hollow portion is in contact with and matches the cam end faces of the two end cams, to drive a driven member for movement of a chisel body.

Abstract: The present invention discloses an electric chisel capable of being matched with a domestic electric drill to be used. The electric chisel comprises an electric drill, a casing, a push rod and chisel head mechanism and a groove cam mechanism. The top of the casing is provided with an oil hole, and a rubber plug is arranged on the oil hole to be used for preventing dust; the two ends of the groove cam mechanism are provided with a first bearing and a second bearing respectively, and a first groove and a second groove are formed below the first bearing and the second bearing respectively and positioned in the inner wall of the casing. The groove cam mechanism is provided with a groove, and the push rod and chisel head mechanism is connected with the groove cam mechanism and performs reciprocating motion up and down in the groove of the groove cam mechanism.

Abstract: A rotating beacon system and a method for synchronizing multiple rotating beacons. The rotating beacon system includes two or more rotating beacons and a feedback based control system adapted to sense an angular position of each of the two or more rotating beacons and generate two or more digitally controlled currents, each of the two or more digitally controlled currents conducted to an associated rotating beacon, the two or more digitally controlled currents driving and controlling the angular speed of each of the two or more rotating beacons to regulate a pre-selected phase relationship between multiple beacons.

Abstract: A rotating beacon system and a method for synchronizing multiple rotating beacons. The rotating beacon system includes two or more rotating beacons and a feedback based control system adapted to sense an angular position of each of the two or more rotating beacons and generate two or more digitally controlled currents, each of the two or more digitally controlled currents conducted to an associated rotating beacon, the two or more digitally controlled currents driving and controlling the angular speed of each of the two or more rotating beacons to regulate a pre-selected phase relationship between multiple beacons.

Abstract: A ladder safety support for use with an existing ladder is disclosed. The support includes an attachment assembly for removable connection to the lower end of the ladder and one of two interchangeable foot assemblies for supporting the ladder on a surface. The first foot assembly provides a surface-penetrating stake having a lower tapered section and presenting a pointed tip and a threaded portion for removably attaching the stake to the assembly. The second foot assembly is similarly removable and provides a surface-engaging pad.