Abstract: An overload relay trip mechanism includes a housing, a reset button, a leaf spring, a test button, a coil spring, and an actuator. The reset button can be actuated from a normal position to a reset position to cause the leaf spring to transition from a first position to a second position, which causes a reset actuator-engaging element to move the actuator from a tripped position to a closed position. The test button can be actuated from a normal position to a test-stop position to cause a first test actuator-engaging element to move a moveable contact from an electrically connected position to an electrically disconnected position. The test button can further be moved from the test-stop position to the test-trip position to cause a second test actuator-engaging element to move the actuator from the closed position to the tripped position.

Abstract: An overload relay trip mechanism includes a housing, a reset button, a leaf spring, a test button, a coil spring, and an actuator. The reset button can be actuated from a normal position to a reset position to cause the leaf spring to transition from a first position to a second position, which causes a reset actuator-engaging element to move the actuator from a tripped position to a closed position. The test button can be actuated from a normal position to a test-stop position to cause a first test actuator-engaging element to move a moveable contact from an electrically connected position to an electrically disconnected position. The test button can further be moved from the test-stop position to the test-trip position to cause a second test actuator-engaging element to move the actuator from the closed position to the tripped position.

Abstract: A bi-directional torque-limiting interface for rotary operating devices is shown and described. The interface includes a first section receiving torque from a source, a second section delivering the received torque to a rotary operating device and a coupler operably connecting the first and second sections. The coupler is preloaded to a predetermined value and maintains a particular angular relationship between the first and second sections under normal operating conditions.

Abstract: A bi-directional torque-limiting interface for rotary operating devices is shown and described. The interface includes a first section receiving torque from a source, a second section delivering the received torque to a rotary operating device and a coupler operably connecting the first and second sections. The coupler is preloaded to a predetermined value and maintains a particular angular relationship between the first and second sections under normal operating conditions.

Abstract: An indexing ring providing automatic continuity between metallic parts of an operator interface device and a support panel in which the operator interface device is mounted. Continuity between the operator interface device and support panel is automatically provided by a continuity rib integrally formed from the indexing feature of an indexing ring. The indexing ring is installed between the operator interface device and the support panel to ensure the relative position of the operator interface device with the support panel. As the indexing feature of the indexing ring is slidably received within the indexing features of the support panel and operator interface device a generally sharp distal edge of the continuity rib will cut through any corrosion protection, such as paint, which might be covering the support panel. Thus, a metal-to-metal connection providing electrical continuity is automatically established and maintained between the operator interface device, indexing ring and the support panel.

Abstract: An optical switch operating mechanism including a housing cooperatively preventing dust and light from easily reaching an optical switch supported within the housing. The housing includes integrally formed spaced apart slots for receiving the optical switch and an associated integrally formed tubular shaft for slidably receiving a switch operator, a portion of which extends outside the housing. The tubular shaft is positioned between the spaced apart slots such that the longitudinal axes of the shaft and it's associated pair of slots and are perpendicular to one another. A light passage, also integrally formed with the pair of slots and associated shaft, passes through the shaft connecting the associated pair of slots such that light from the optical switch emitter can be received by the optical switch receiver when a window in the switch operator is aligned with the light passage.

Abstract: A manually actuatable integrated pilot light/contact/communications module connecting to an associated output device also having a communications module by means of a common communications link. The integrated pilot light/contact/communications module has at least one electrical contact, a logic circuit, a communications circuit, a communications terminal and pilot light activation circuit mounted on a printed circuit board. A bulb base for a pilot light is mounted on the module enclosure and electrically connected to the printed circuit board. The printed circuit board provides communication between the electrical contact and the logic circuit, between the logic circuit and the communications circuit, between the communications circuit and the communications terminal, between the communications circuit and the pilot light activation circuit, and between the pilot light activation circuit and the pilot light. The printed circuit board is enclosed within the module housing.

Abstract: A manually actuatable integrated contact module connecting to an output access module by means of a common communications link. The integrated contact module has an electrical contact, a logic circuit, a communications circuit and a communications terminal mounted on a common printed circuit board. The printed circuit board provides communication between the electrical contact and the logic circuit, between the logic circuit and the communications circuit, and between the communications circuit and the communications terminal. The printed circuit board is enclosed within a protective housing. A contact operator is slidably mounted with respect to the printed circuit board such that it is partially enclosed within the housing and movable between a first position and a second position.

Abstract: The cable receptacle of the present invention allows for substantially unimpeded insertion of a fiber optic cable and the selective impeding of the withdrawal of the fiber optic cable through retention structure. The retention structure is provided by cooperation among a cover, a housing, a gripper, a pivot support arm and a channel. The cover includes a fiber opening through which the fiber optic cable extends and a gripping adjustment opening allowing access to a positioning portion of the gripper. A housing is attached to the cover and may include either a portion of the channel, or the pivot support arm or both. To the extent that the housing does not provide, or only partially provides, the channel or pivot support arm then the cover makes up the lack. A gripper having a tooth end and a distal end to either side of the pivot point, includes a resilient spring to bias the gripper to the end into engagement with the fiber optic cable. The pivot support arm pivotally supports the gripper for rotation.

Abstract: The rotational optical switch of the present invention includes a switch enclosure, a light conductor, an optical shutter, a torsion spring biasing the shutter towards a bistable state, and a shutter actuator. The switch enclosure generally encloses the remaining components. The light conductor is received in the switch enclosure and extends between the enclosure and a transceiver, which provides a signal reflective of the state of the optical shutter. The optical shutter is pivotally mounted within the switch enclosure and is bistable between a reflective state which reflects light into the light conductor, and a nonreflective state which does not reflect light into the light conductor. The shutter pivots on arms to either end of a support cylinder which have knife edges. The shutter actuator is pivotally connected to the optical shutter by the torsion spring to cause the optical shutter to snap between the bistable states. The optical shutter has two reflectors in opposite reflective states.

Abstract: A pressure responsive switch apparatus comprising a housing including a wall defining a passageway having an end adapted to communicate with a source of fluid under pressure, a switch supported by the housing, an actuator which is movably supported by the housing and which includes an end extending into the passageway, an actuator for actuating the switch in response to movement of the actuator, and a cup-shaped member detached from the actuator and located within the passageway and between the actuator and the end of the passageway for sealingly engaging the wall and moving the actuator away from the end of the passageway in response to pressure from the fluid source.

Abstract: The disclosure depicts a novel pushbutton switch mechanism having a pair of pushbutton switches with electrical contacts and an interlock mechanism between the switches. The interlock mechanism comprises; a shoulder on each of the pushbutton switches, an interlock plunger for contacting the shoulders of the pushbutton switches, and a return spring in contact with the interlock plunger for retaining the plunger in a predetermined position. A plunger support and a plunger guide in the pushbutton switch mechanism for defining an area in which the interlock plunger is contained. When one of the pushbutton switches is depressed, the interlock plunger contacts the shoulder of the other pushbutton switch thereby preventing the other pushbutton switch from being depressed simultaneously.