Abstract: A safety arrangement for use with a piece of equipment. The safety arrangement includes a signal generating unit for generating an optical signal, an elongate element, and a signal detecting unit. The elongate element is disposed along, about, around or through the piece of equipment and is capable of transmitting an optical signal. The signal detecting unit detects an optical signal. The signal generating unit is connected to the signal detecting unit by the elongate element such that the signal detecting unit is in optical communication with the signal detecting unit. The signal detecting unit is arranged to detect a change in the optical signal transmitted by the elongate element as a consequence of movement of the elongate element and, upon detection of the change in the signal, the detecting unit is configured to effect a change in the operation of the piece of equipment.

Abstract: A safety switch that includes a body, a number of contacts, a movable plunger, a signal emitter, and a signal detector. The signal emitter and signal detector are positioned proximate the plunger and configured to assess the operability of the safety switch. The plunger is configured to selectively allow or prevent passage of a signal emitted from the signal emitter toward the signal detector depending on a position of the plunger. Control circuitry in connection with the signal detector is arranged to generate a control signal based on the detection of the emitted signal and configured to control operation of the safety switch independent of the relative position of the number of contacts.

Abstract: A safety switch that includes a housing, a first switch, and a second switch. The switch has a two part rod that is axially moveable within the housing. The parts of the rod are co-operable with respect to one another and independently operable to activate one of the first and second switches. A biasing element is arranged to bias the rod parts into contact with a cam arrangement and arranged to bias the rod parts out of engagement with one of the respective switches. The cam arrangement is configured such that rotation of the cam arrangement will move the rod parts thereby activating the switches to allow the safety switch to conduct electricity.

Abstract: There is provided a safety switch arranged to allow the control of power supplied to an apparatus, wherein the safety switch is provided with a biometric sensor module arranged to obtain biological information from a user of the safety switch, such that activation of the safety switch is controlled via the biological information obtained.

Abstract: There is provided a safety switch having a housing configured to receive a removable key, and a mechanism arranged to be operated when the key is moved from an engaged position to a partially disengaged position, the mechanism being arranged to cause a signal to pass to a separate apparatus, wherein the safety switch further comprises a lock which is controlled by the separate apparatus and is arranged to prevent the key from being fully disengaged from the safety switch until a signal has been received in response from the separate apparatus.

Abstract: A safety switch configured to determine whether a magnetically operated switch which forms part of the safety switch has been welded closed. The safety switch is configured to establish a first magnetic field in the vicinity of the magnetically operated switch. The magnetic field is arranged to move the magnetically operated switch from a first configuration to a second configuration. The safety switch monitors the state of the magnetically operated switch to determine if the magnetically operated switch has been moved by the first magnetic field, thereby determining if the magnetically operated switch has been welded closed.

Abstract: A locking switch assembly includes a cam, a plunger, and a locking mechanism. The cam is rotatably attached to a frame assembly and an end of the plunger is constructed to follow a contour of the cam. The plunger is movable between a plunger first position and a plunger second position. A pin is biased against the plunger and movable between a pin first position and a pin second position and locks the plunger in the plunger second position when the pin is in the pin second position. A breakable arm prevents movement of the plunger from the plunger second position to the plunger first position unless a force above a selected amount is applied to the cam when the plunger is in the plunger second position.

Abstract: A safety switch assembly includes a body constructed to be mounted in a support structure and generally enclose the operative structure of the safety switch. The safety switch assembly includes an actuator constructed to pass through one of the support structure or the base to operatively engage the operative structure of the safety switch to control the safety switches electrical orientation to communicate or terminate communication of electrical power to a device equipped with the safety switch.

Abstract: A safety switch includes a cable having a first end connected to a cable translator moveable between a disengaged position and an engaged position, the cable having a second end for connection to a remote lock and power supply switch.

Abstract: A safety switch for a safety circuit includes a moveable magnet located between a fixed contact and a fixed magnet. The safety switch includes a coil located adjacent the moveable magnet and arranged such that the coil pushes the moveable magnet towards the fixed contact so that the movable contact presses against the fixed contact when the coil is energised and so that the moveable contact moves away from the fixed contact when the coils are not energised.

Abstract: A locking switch assembly includes a cam, a plunger, and a locking mechanism. The cam is rotatably attached to a frame assembly and an end of the plunger is constructed to follow a contour of the cam. The plunger is movable between a plunger first position and a plunger second position. A pin is biased against the plunger and movable between a pin first position and a pin second position and locks the plunger in the plunger second position when the pin is in the pin second position. A breakable arm prevents movement of the plunger from the plunger second position to the plunger first position unless a force above a selected amount is applied to the cam when the plunger is in the plunger second position.

Abstract: A switch mechanism embodying the invention comprises a switch head assembly with at least one stationary contact and at least one movable contact carried by an axially movable contact carrier, a cam head assembly, a plunger assembly with a sealing element and a U-shaped yoke. The sealing element comprises a bellows seal having an outer peripheral rim that is trapped between the switch assembly housing and the tulip end of the cam head housing on assembly thereof. The bellows seal further comprises an inner annular part that is over molded onto the plunger body where and has a relieved portion comprising V-shaped troughs and ridges and undercutting in the form of annular grooves that open towards one another. The relieved portion provides a positive connection between the sealing element and the plunger and the tracking path for preventing liquid ingress is increased significantly.

Abstract: A switch mechanism embodying the invention comprises a switch head assembly with at least one stationary contact and at least one movable contact carried by an axially movable contact carrier, a cam head assembly, a plunger assembly with a sealing element and a U-shaped yoke. The sealing element comprises a bellows seal having an outer peripheral rim that is trapped between the switch assembly housing and the tulip end of the cam head housing on assembly thereof. The bellows seal further comprises an inner annular part that is over molded onto the plunger body where and has a relieved portion comprising V-shaped troughs and ridges and undercutting in the form of annular grooves that open towards one another. The relieved portion provides a positive connection between the sealing element and the plunger and the tracking path for preventing liquid ingress is increased significantly.