Abstract: A power line carrier controlled lighting system connected to an AC power line.

Abstract: Intake or exhaust reed valves of a compressor or vacuum pump have T-shaped flappers which are received in similarly T-shaped pockets so as to be substantially flush with the valve plate. A dirt trap groove is formed in each pocket adjacent to the hinge line of the flapper, a corner relief groove surrounds lands which support the flappers in their associated pockets above the groove, and the extending-part of each pocket widens in the direction away from the cross-part of the pocket. The mating T-shapes of a flapper in a pocket restrain the flapper in the pocket without interfering with the opening and closing motion of the flapper.

Abstract: A spray shield for temporarily covering an open face of a fixture, particularly a canister light fixture. The spray shield is conveniently outlined on and removable from a panel of cardboard shelf packaging of the canister light. The spray shield provides a disk-shaped portion surrounded by radially extending tabs which can be bent off from to the disk-shaped portion to form a resilient shallow pan which is grippingly held within an inside surface of the canister light. The spray shield as a flat panel can be easily removed from a panel of the packaging which provides a weakened line around an outer circumference of the spray shield.

Abstract: A housing for a tubular lamp having a generally rectangular configuration with parallel side walls and end walls forming a box with an open top and bottom. The side walls provide a channel at a bottom end and an inwardly directed flange at a top end along their length. A V-shaped reflector having straight segments with horizontally turned end portions is resiliently inserted against each side wall where one of the horizontally turned end portions presses against the inwardly directed top flange and the opposite end portion of the reflector fits into the channel. The invention provides for quick assembly and change-out of reflectors depending on conditions.

Abstract: A valve plate assembly is provided with a valve restraint for maintaining a valve within a recessed portion of the valve plate. The valve restraint further includes an irregular surface which contacts the surface of the valve when the assembly is in use, for example, in a compressor. The irregular surface may include through-holes at least partially through the surface which contacts the valve or may be a textured surface which contacts the valve during use. The valve plate includes a recessed portion having guides for receiving notched sections in the sidewalls of the valve and valve restraint.

Abstract: An adjustable lighting fixture has a power transfer means interposed between a lamp holder and the point of mounting. The power transfer means has an input shaft, which may be offset from the point of mounting, such as a fixture mounting pole, or in line therewith, and an output shaft which rotates in response to the rotation of the input shaft about its own axis. When the axis of power input is in line with the point of mounting, a physical rotation of the power transfer means will cause the rotation of the lamp holder about an axis extending through the point of mounting. When the axis of power input is offset from the point of mounting, an orbital input about the axis of the power input, or in other words an orbiting of the power input shaft about the axis extending through the point of mounting, will cause rotation of the lamp holder about said axis extending through the point of mounting.

Abstract: A latch assembly for use with a panic exit device, particularly a top latch having a U-shape which engages a stem portion of a T-shaped receiving lug mounted overhead to a top member of the door frame. The U-shaped top latch is pivotably mounted to the active stile of the door. The latch assembly causes the U-shaped latch to pivot upward to capture the stationary T-shaped receiving lug, or pivot downwardly to disengage from the T-shaped receiving lug. The latch member is in sliding and abutting engagement with two latch plates which slide in one direction to retain the latch member in a downward orientation to hold the latch in an open position, and slide in an opposite direction to allow the latch member to pivot upwardly upon engaging pressure by the strike. A wedge is caused to slide into blocking engagement with the latch when it is in the closed position.

Abstract: A device for closing swinging doors of the type utilizing a rotating member to compress a spring during door opening to store energy in the spring to effect a closing of the door is provided with a driving connection to a d.c motor/generator effective to cause rotation of the motor during a closing movement of the door. The motor/generator acts as a generator during the closing with the generated electrical energy fed back to the motor/generator to retard rotation of the rotor, providing a brake on the closing movement of the door. The feedback circuitry includes a switch disabling or diminishing the braking during the final degrees of closing movement as well as a variable setting device allowing control of braking force.

Abstract: A power line carrier controlled lighting system connected to an AC power line.

Abstract: A valve plate assembly includes a flapper valve and restraint in recessed intake and outlet ports of a valve plate. The recessed ports have guides located therein corresponding to notched sections of the flapper valve and the restraint such that a foolproof method of assembly can be achieved. In addition, a screw clearance in the top of the piston is not required since the recessed portion allows for the screw to be at or below the surface of the valve plate.

Abstract: A one-piece piston assembly including a hollow frusto-conical piston is secured to a crankshaft ring via a hollow joint or waist member. Preferably the joint or waist member is frusto-conically shaped as well.

Abstract: A device for controlling swinging doors utilizing an externally powered motor to compress a spring during door opening to store energy in the spring. The motor is not used to open the door, but only to compress the spring, thereby utilizing a minimum amount of electrical energy and allowing for a very easy opening of the door. The motor acts as a generator during the closing of the door with generated electrical energy fed back to the motor to retard rotation of the rotor, providing a brake on the closing movement of the door. The feedback circuitry includes a switch for varying the braking during the final degrees of closing movement as well as a variable setting device allowing control of braking force.