Abstract: A battery operated hand-held dispenser which operates efficiently at lower power levels than prior art devices. The dispenser as included therein has spray, foam or stream, dispensing capabilities coupled with pump mechanisms, vent mechanisms and positive closures.

Abstract: An improved closed-end manometer which overcomes the problems associated with prior U-tube manometer devices. The invention comprises a small bore tube which is transparent or translucent at least along the measuring portion and which may be of tapered or cylindrical bore, a permanent closure at one end of the tube, a relatively small indicating slug formed of a suitable liquid, a measuring scale to note the position of the liquid slug, and a measured quantity of a selected gas between the closure and the nearest end of the liquid slug. The open end of the tube is connected to the vessel or system whose pressure is to be measured or monitored. One feature of the present invention is its ability to provide quantitative pressure indications over a wide range of pressures, or the invention may be calibrated to provide increased sensitivity over a relatively short measuring range. Another feature of the invention is its ability to provide accurate pressure measurements regardless of the instrument's orientation.

Abstract: In a space shuttle, payloads are individually temperature controlled by means of a liquid control loop in heat exchange relationship with both the payload and a radiator or shuttle cold plate. The liquid pump is driven at a variable speed to control the heat transferred between the load and the radiator or cold plate, and the motor may be reversed to by-pass the radiator through check valves. The radiator includes heat pipes seated in elongated, high thermal conductivity extrusions and retained therein by elongated springs. The motor is a brushless DC motor isolated from the pump by a magnetic clutch and thermal isolator. The motor is driven by a digital circuit which provides a single pulse to each set of windings during each energizing time frame. The width of that pulse is modulated to provide for speed control. Pulse width modulation is by means of a one-shot, the pulse duration of which is controlled by a speed control signal.