Abstract:
A discharge valve for each of a plurality of manifold connected containers for fire extinguishing fluid, the discharge valve including a main valve pressure seated by fluid in the container to which it is attached and openable by pressure in the valve outlet from the manifold. This action is achieved by use of a double faced two diameter piston integral with the main valve member. A combination filling and pilot valve is included so that each container may be separately filled while connected to the manifold. The pilot valve may be actuated to discharge one container to provide manifold pressure for discharge of the remaining cylinders.
Abstract:
A dead bolt latch for a door has a cam action for extending the bolt, the cam having the form of a pivoted arm and rotated by the tail piece of lock device. The pivot axis is near one edge of a lock case extension and engages a cam opening in an actuating slide at the opposite side of the case extension. The actuating slide is attached to a latch bolt and shifts the latch bolt between extended and retracted positions when the cam is rotated.
Abstract:
A jig especially adapted for use by a locksmith or other such skilled person in the assembly of a laminated padlock in a small shop or similar location where locks are ordinarily sold or serviced by hand. The jig comprises a base member provided with a plurality of upright pins defining an opening corresponding to the outer contour of the body laminations forming the padlock housing. The jig provided for stacking and aligning the laminations within the opening provided by the pins enables the other parts of the padlock to be fitted within the housing as it is being formed. Upon completion of the assembly of the padlock parts on the jig a clamping arm on the jig provides for pressing and holding the laminations of the padlock housing together such that the assembly of parts can be properly anchored by riveting in operating relationship.
Abstract:
An alarm has a housing attachable to a door and provided with a spring-operated actuator restrained by a striker that is either attached to doorway structure or so attached to the housing as to move relative thereto out of its actuator-restraining position as the door is opened. The alarm includes an operating member movable by the actuator when driven by its spring into an operative position only from a set position as the door is opened, in which operative position it closes an electric circuit to an audible signal. The operating member is wholly within the housing in its circuit-closing position and the housing has a plurality of identical, manually rotatable buttons exposed on its cover to a selected one of which an arm is connected that is operable to reset the operating member thereby to open the circuit.
Abstract:
A series of sheet metal plates are formed into laminations and openings are provided in them so that when they are stacked together the openings form a chamber of such size and configuration that it snugly accommodates the housing of a keyactuated mechanism. The cylinder plug has a keyway formed in it of such cross-sectional shape that it can receive keys of a number of different kinds. Appropriate pin tumblers are matched to a selected key and the mechanism then assembled in the padlock made up of the laminations, with the laminations set in a convenient jig and riveted together by hand.
Abstract:
In a device such as a microwave oven, a pair of interlock switches are placed in series with the power supply to the energy generator, these switches being interlocked with the oven door which seals the microwave compartment such that when the door is opened, both switches which are in series with each other will also open to cut off the supply of power. Each of the switches has a detection circuit connected thereacross so that in the event that such switch should fail and not open when the door opens, a switch mechanism will be actuated so as to actuate circuit breaking means to interrupt the supply of power to the energy generator.
Abstract:
A dry-type sprinkler for use in fire protection systems wherein fluid passage through the sprinkler is closed by a valve at the intake end until released by a heat responsive mechanism, characterized by a floating inner tube assembly which automatically compensates for dimensional changes in length of the inner tube with respect to the outer tube when subjected to ordinary thermal effects, and by which loads are isolated within the sprinkler head assembly which includes the heat responsive mechanism, and no loads are transmitted through the inner or outer tubes which might affect the sealing function of the valve.