Abstract: A paperless recorder for recording pressure and alarm condition data from a fire controller for a fire pump control system. The fire pump is connected a pipe network which has a pressure sensor for sensing pipe pressure. The recorder is connected to the pressure sensor and checks for pressure changes. When a pressure change is detected, it is stored in an electronic memory. Pressure readings are also periodically stored in the electronic memory. The recorder may also monitor alarm voltages and alarm contacts which may also be stored in the electronic memory. The stored data may be transmitted to a computer via modem or port connection for further analysis.

Abstract: A manually operable clamp for removing the sprocket feed margin strips from continuous computer print-out paper when the strips are removably attached along perforated tear lines. In the preferred form, the jaws of the clamp are integrally connected by a live hinge and have elongated rectangular mating clamping surfaces which are provided by U-shaped channel portions of the jaws. The clamping surface of one jaw has a plurality of pin-receiving openings therein while a plurality of pins project from the other clamping surface. The size and spacing of the sprocket tooth receiving openings in the margin strips. The inner side of the U-shaped channel portion of the jaw having the clamping surface with pin-receiving openings serves as a fence against which the elongated edges of margin strip abut when the openings in the margin strips are in alignment with the pin-receiving openings.

Abstract: A three phase saturating reactor is constructed of thin E and I shaped laminations that are interleaved to minimize the effects of air gaps. The laminations include apertures that are in alignment and four identical frame members are secured thereto by means of insulated bolts that pass through the apertures in the core and corresponding holes in the frame members. The taps of the electrical phase coils that encircle the legs of the core are of heavy conductors that are self-supporting. The saturating reactor design is such that the core is driven into saturation at a small percentage of the rated current of the reactor to rapidly develop a back EMF when in a motor starting circuit.