Abstract: A control valve assembly incorporates direct metal-to-metal engagement between a casing of a temperature-responsive valve actuator and a piston guide to promote ease and accuracy of calibration. In addition, a substantially frictionless override feature is incorporated in the assembly to effect pressure relief and to accommodate thermal excursion of the valve actuator beyond the travel required to effect the desired valve movement.

Abstract: Pressurized control signal apparatus is disclosed, which being supplied with air from a source of variable pressure, is operative to produce a control signal essentially independent of variations in the supply pressure. In one aspect of the invention, the control signal is amplified in volume of flow; in another, it is generated in response to temperature. The apparatus is specifically adapted to effect regulation of air flow in a variable air volume (VAV) temperature conditioning system in response to temperature in a conditioned zone, wherein the supply air for the apparatus is derived from a temperature conditioned air distribution duct of the VAV system.

Abstract: This shower head serves to replace existing shower heads, and when the water becomes too hot for safety, it is so designed, that it will stop the hot water flow from striking the bather. It consists primarily of a fixed thermostat, which, when expanded, will cause a disc attached to a piston to be, by water pressure, urged against an opening, to cut off the water flow on the bather, and the hot water is then shut off at its source by the bather. The head further includes a lower passageway leading to a depressible relief valve, for releasing the hot water from the thermostat area, so as to enable the thermostat to reset.

Abstract: The apparatus for making ice blocks comprises a hollow body containing projecting parts faced downwards. Referigerating fluid and heating fluid are circulated separately through this body. A tray is around the projecting parts in its uppermost position. This tray is supported by a mechanism between an uppermost and a lowermost position and a water supply line comprising a cock opens into said tray. When ice has formed on the projecting parts, an electric circuit is closed and the cock opens for some time. Thus the tray falls. In the lowermost position water flows away out of the tray and therefore the tray rises up to its uppermost position.

Abstract: For obtaining a noiseless or substantially noiseless process of a flow passing through a throttle or damper device, the flow is given a speed increase with increasing acceleration in the direction of flow. Further, at least a substantial part of the dynamic component of the energy state of the flow is quenched within or immediately after the device by means of a counter-directed flow having a similar dynamic component. The invention also concerns a throttle or damper device for such a noiseless or substantially noiseless process of a flow.

Abstract: The stove combustion chamber is lined with a layer of refractory material. Above this a baffle extends at an angle upwardly from the rear wall of the stove part way toward its front wall. Three tubular heat exchangers open at their forward ends on a grill on the front of the stove, and extend rearwardly over the combustion chamber and baffle to a duct mounted on the rear of the stove. The refractory material and baffle help retain heat in the stove to keep the heat exchange tubes warm, and a blower, which is connected to the duct and is controlled by a thermostat, blows warm air from inside the tubes outwardly through the grill into the room containing the stove.

Abstract: A thermostat valve of the type actuated by a wax cylinder incorporating a needle piston, wherein the diameter of said needle is reduced at least at a portion thereof which is received in a bore of the wax cylinder.

Abstract: A heating system using heat derived from solar collectors to operate a reciprocating piston heat engine which provides operating power to drive a heat pump, and with additional capability to operate as a heat pump with electric motor drive, and with separate inlet valves for heat engine and heat pump operation.