Abstract: An elevator guide rail block assembly configured for use with an elevator car or counterweight guide rail is provided. The elevator guide rail block assembly includes a framework and a plurality of cams supported for rotation by the framework and positioned between spaced apart support elements. The spaced apart support elements are connected together by a retention element. An actuator element is configured to actuate rotation of the plurality of rotatable cams. A clamp structure is attached to the framework and is spaced apart from the plurality of rotatable cams. In a rotated orientation, each of the plurality of rotatable cams engage a face of an elevator or counterweight guide rail and the clamp structure engages an opposing face of the elevator or counterweight guide rail to form a clamping action configured to secure the elevator guide rail block assembly to the elevator car or counterweight guide rail.

Abstract: The present disclosure provides a cable coupling assembly for releasably coupling a first cable subassembly and a second cable assembly. The second cable subassembly includes a coupler affixed to a core of the second cable subassembly. The coupler is configured to engage a first slug of the first cable assembly in a capture socket of the coupler, wherein the coupler is slidably received within a casing connected to the first cable subassembly. The coupler can be affixed to the core of the second cable subassembly to preclude longitudinal translation or rotation relative to the second core.

Abstract: The present invention provides a knife with a replaceable blade which is spring-biased in the retracted position. The knife is designed such that the blade can only be extended by exerting a downward force and by turning the handle with respect to an inner housing. The handle has a tab affixed to the inside wall of the handle. The inner housing has an angled slot in its wall adapted to receive the tab. When the blade is fully retracted, the tab rests on the shoulder at the top of the inner housing. A straight downward pressure on the handle causes the tab to engage the shoulder and will not allow the blade to extend. When the handle is rotated, the tab enters the slot and the blade is forced downward. As this occurs, the blade extends through a slot at the bottom of a blade cover. When the blade is removed from the object to be cut, the spring forces the handle to move with respect to the inner housing and causes the blade to retract within the blade cover.

Abstract: The present invention provides a knife with a replaceable blade which is spring-biased in the retracted position. The knife is designed such that the blade can only be extended by exerting a downward force and by turning the handle with respect to an inner housing. The handle has a tab affixed to the inside wall of the handle. The inner housing has an angled slot in its wall adapted to receive the tab. When the blade is fully retracted, the tab rests on the shoulder at the top of the inner housing. A straight downward pressure on the handle causes the tab to engage the shoulder and will not allow the blade to extend. When the handle is rotated, the tab enters the slot and the blade is forced downward. As this occurs, the blade extends through a slot at the bottom of a blade cover. When the blade is removed from the object to be cut, the spring forces the handle to move with respect to the inner housing and causes the blade to retract within the blade cover.