Abstract: A hazard alert device, which can be battery powered or hard wired, is configured to provide a hazard alert when a gate along an edge of an elevated surface is in the open position. Upon detecting the gate is in the open position, the device produces an audible and visual alert. When the gate, disposed within a portion of the barrier, is opened to allow the movement of people and/or materials to or from the elevated surface, the device includes a snooze mode enabling the audible alarm to be silenced for a period of time. If the gate is inadvertently left in the open position, the audible alert serves as a reminder to close the gate. This device may include first and second sensors with dual channels (output signals) and dual cross-checking processors that continually compare outputs from the sensor channels to identify any defect in the sensor or wiring.

Abstract: A method, and a system of using the method, of controlling a motor having a rated capacity. The method includes determining the motor has been started, determining a plurality of operating parameters of the motor after the motor has started, determining a threshold from a portion of the operating parameters, comparing one of the determined operating parameters with the threshold, and operating the motor at a level corresponding to below the rated capacity when one of the determined operating parameters is greater than the threshold. When an electric motor having a control system according to the present invention lifts a load, drives a machine, or starts other motions, the control system automatically adjusts to a power level that corresponds to the load. In this way, the motor will not be allowed to exert any power or force to the load in excess of what is necessary.

Abstract: A method, and a system of using the method, of controlling a motor having a rated capacity. The method includes determining the motor has been started, determining a plurality of operating parameters of the motor after the motor has started, determining a threshold from a portion of the operating parameters, comparing one of the determined operating parameters with the threshold, and operating the motor at a level corresponding to below the rated capacity when one of the determined operating parameters is greater than the threshold. When an electric motor having a control system according to the present invention lifts a load, drives a machine, or starts other motions, the control system automatically adjusts to a power level that corresponds to the load. In this way, the motor will not be allowed to exert any power or force to the load in excess of what is necessary.

Abstract: A vertical reciprocating conveyor includes a frame and a carrier movable up and down with respect to the frame to elevate and lower articles supported by the carrier. The conveyor also includes a prime mover and at least one sprocket rotating in response to operation of the prime mover. At least one flexible support member extends across the carrier from one side to an opposite side, and engages the at least one sprocket such that the at least one flexible support member is collected and let out in response to the direction of rotation of the sprocket to raise and lower the carrier with respect to the frame. The conveyor also includes brakes on the opposite sides of the carrier. The brakes are biased to engage the frame to prevent the carrier from free falling.

Abstract: Panels of a security paneling system are secured to a support member with a plurality of security fastening assemblies consisting of a security fastener and a security washer. The security fastener includes a shank connected to a slotless head including a peripheral edge portion having a special shape. The security fastener is rotatable for installation and removal with a special driving tool including a driver head which has a cavity with an internal shape corresponding to the shape of the peripheral edge portion of the security fastener head and is adapted to fit over and drivingly engage the peripheral edge portion. The security washer includes a central aperture through which the shank of the security fastener extends and a recess concentric with the aperture for receiving the head of the security fastener.

Abstract: A support for tamper proof securing a light fixture including a housing having a peripheral mounting flange on a ceiling panel including a fixture receiving opening having spaced apart side and end margins surrounding the fixture receiving opening and having inner and outer surfaces. The support has a hanger bracket which bridges the opening at a location between the end margins. Each of a pair of spaced apart jacks adjustably mounted on the hanger bracket has an abutment which is movable into a backstop position relative to the outer surface of the respective fixture receiving opening side margin. A suspension device on the hanger bracket is connectable with the light fixture housing, after the fixture housing has been inserted through the opening, for moving the fixture into a finally installed position wherein the side margins are clamped between the mounting flange of the fixture and the abutments on the jacks.

Abstract: The suspended security ceiling system includes a plurality of elongated ceiling panels having a planar web section and rail portions extending along the opposite side edges of the web section, a pair of channel-shaped wall mounts mounted on the opposed walls of a room, such as a prison or jail cell, and having an upper laterally extending flange and a lower laterally extending flange on which one end of a ceiling panel rests. The ceiling panels are held in place by channel-shaped retainer clips which are arranged to snap in between the upper and lower flanges of the wall supports at locations between the ceiling panel rails and have a lower leg which bears against the surface of the web sections of the ceiling panels to clamp them against the lower flanges of the wall supports. For larger rooms requiring ceiling panels end to end, generally inverted T-shaped intermediate supports suspended from ceiling joists or other overhead support and extending parallel to the wall supports are used.