The invention relates to a safety switch assembly (100) having a switch installation (120) having at least one switching member (12) and at least one actuation installation (110) having at least one assigned actuator (13, 13, 13, 14), wherein a transmission installation (130) having at least one transmission member (135) which is coupleable or coupled to the switching member (12, 12a), on the one hand, and to the at least one actuator (13, 13, 13, 14), on the other hand is provided between the actuation installation (110) and the switch installation (120). In order to have available a safety switch assembly (100) in which a mechanical fault does not lead to a failure of that functionality that optionally permits the integration of a diagnostic function in order for the system in the case of a fault being detected to be able to be brought back to a safe state and that permits a transfer of mechanical as well as of electrical/electronic functions across the entire system, it is provided that the transmission installation (120) is provided with a plurality of separate transmission members (135) which in the actuation of the at least one actuator (13, 13, 13, 14) of the actuation installation (110) are drivable or driven in a synchronous and mutually independent manner, and that each of the transmission members (135) by way of a rotary movement is permitted to convert an actuation movement of the at least one actuator (13, 13, 13, 14) to a translatory movement of in each case one separate switching member (12, 12a) of the switch installation (120). (FIG. 4).

A work machine includes an engine, a hydraulic pump, a work apparatus driver to receive a pressurized fluid, a hydraulic circuit connecting the hydraulic pump with the work apparatus driver, a control valve in the hydraulic circuit, a relief valve connected to a first portion upstream of the control valve, a drain path connected to a second portion upstream of the first portion, an on-off valve to open and close the drain path, and a controller to control the on-off valve based on a state of the engine. The controller is configured or programmed to keep the on-off valve open after detecting an operation to start the engine until detecting a start of the engine and to close the on-off valve in response to detecting the start of the engine.

A work machine includes an engine, a hydraulic pump, a work apparatus driver to receive a pressurized fluid, a hydraulic circuit connecting the hydraulic pump with the work apparatus driver, a control valve in the hydraulic circuit, a relief valve connected to a first portion upstream of the control valve, a drain path connected to a second portion upstream of the first portion, an on-off valve to open and close the drain path, and a controller to control the on-off valve based on a state of the engine. The controller is configured or programmed to keep the on-off valve open after detecting an operation to start the engine until detecting a start of the engine and to close the on-off valve in response to detecting the start of the engine.

A safety switch (2) with a latching unit (12), by means of which an associated actuator (3) is held in a latched position. The latching unit (12) has an arrangement of latching jaws (14). Each latching jaw (14) is spring-mounted by means of a spring unit (15). The latching jaws (14) are concentrically arranged and each face one another with a first free end and delimit an insertion opening (A). The latching jaws (14) are held in latched position by the spring forces generated by the spring units (15). The latching jaws (14) can be displaced against the spring forces of the spring unit (15), which serves to enlarge the insertion opening (A).

A rotary switch device includes a terminal base to which a center portion contact and a fixed contact are fixed, a rotation operation member which is operable to rotate around the center portion contact with respect to the terminal base, a plate-like movable contact member which includes a contact protrusion part and a contact surface and which is held in the rotation operation member so as to short-circuit between the center portion contact and the fixed contact at a conductive rotation position, and a compression coil spring of a barrel type.

An equipment isolation switch assembly (200) for use in a remote isolation system (10) for isolating an equipment item (20,21) comprising an equipment isolation switch (400) movable between a first position (NORMAL) in which said equipment item (20,21) is energized by an energy source (30) and a second isolated position (ISOLATE) in which said equipment item (20,21) is isolated from said energy source (30) and an actuating device (500) co-operable with the equipment isolation switch (400) to move it between said first and second positions wherein said isolation switch assembly (200) includes at least one securing means (291,405) for securing said actuating device (500) in co-operation with said equipment isolation switch (400) whenever in operative state.

An equipment isolation switch assembly (200) for use in a remote isolation system (10) for isolating an equipment item (20,21) comprising an equipment isolation switch (400) movable between a first position (NORMAL) in which said equipment item (20,21) is energized by an energy source (30) and a second isolated position (ISOLATE) in which said equipment item (20,21) is isolated from said energy source (30) and an actuating device (500) co-operable with the equipment isolation switch (400) to move it between said first and second positions wherein said isolation switch assembly (200) includes at least one securing means (291,405) for securing said actuating device (500) in co-operation with said equipment isolation switch (400) whenever in operative state.

A starting key apparatus of a vehicle includes: a housing including a stopper protrusion at an inner wall of the housing; a starting key rotating part installed in an end of the housing and in which a starting key is inserted; an ignition switch installed at another end of the housing and configured to start an engine; and a connection shaft provided in the housing and configured to connect the starting key rotating part to the starting switch, wherein the connection shaft includes: a shaft body rotated based on a shaft; a blocking lever installed in a cut groove of the shaft body to be rotated based on a hinge shaft; and a spring configured to connect the shaft body to the blocking lever to provide an elastic force to the blocking lever.

A starting key apparatus of a vehicle includes: a housing including a stopper protrusion at an inner wall of the housing; a starting key rotating part installed in an end of the housing and in which a starting key is inserted; an ignition switch installed at another end of the housing and configured to start an engine; and a connection shaft provided in the housing and configured to connect the starting key rotating part to the starting switch, wherein the connection shaft includes: a shaft body rotated based on a shaft; a blocking lever installed in a cut groove of the shaft body to be rotated based on a hinge shaft; and a spring configured to connect the shaft body to the blocking lever to provide an elastic force to the blocking lever.

A device that is placed between the electrical power source and electrical equipment such that power going to the equipment can be controlled, regulated, and monitored. An individual may request access to use the electrical equipment by means of unique identification. The device is able to compare the user's request for authentication via a locally stored list (database) or remotely situated list. The device contains audio and visual indications of the current status of power going to the electrical device. An apparatus is used to prevent a user from disconnecting electrical equipment from the device and reconnecting it directly to the power source. A related method of use is also claimed.