Abstract: A pump is provided including a housing and a plurality of diaphragm assemblies radially disposed within the housing, each diaphragm assembly of the plurality of diaphragm assemblies including a diaphragm. A drive element is configured to be eccentrically coupled to a rotating shaft motor to actuate the diaphragm for each of the plurality of diaphragm assemblies to draw fluid into or expel fluid from the diaphragm assembly. The drive element includes a first member and a plurality of second members, each second member of the plurality of second members being movably secured to the first member and disposed between the first member and the diaphragm of each of the plurality of diaphragm assemblies. During actuation of each diaphragm of the plurality of diaphragm assemblies, the corresponding first member and second member provide a continuously rigid radial coupling with the diaphragm.

Abstract: A pump is provided including a housing and a plurality of diaphragm assemblies radially disposed within the housing, each diaphragm assembly of the plurality of diaphragm assemblies including a diaphragm. A drive element is configured to be eccentrically coupled to a rotating shaft motor to actuate the diaphragm for each of the plurality of diaphragm assemblies to draw fluid into or expel fluid from the diaphragm assembly. The drive element includes a first member and a plurality of second members, each second member of the plurality of second members being movably secured to the first member and disposed between the first member and the diaphragm of each of the plurality of diaphragm assemblies. During actuation of each diaphragm of the plurality of diaphragm assemblies, the corresponding first member and second member provide a continuously rigid radial coupling with the diaphragm.

Abstract: An extended fire-extinguishing discharge system discharges a fire-extinguishing material at a predetermined mass flow rate. The extended discharge system includes an extended discharge container filled with a fire-extinguishing material, at least one discharge nozzle connected with the extended discharge container for discharging the fire-extinguishing material into a protected space, and a variable pressure controller interconnected between the container and the discharge nozzle. The fire extinguishing material flows through the variable pressure controller which produces a regulated pressure as a function of the inlet pressure to the variable pressure controller. By varying the regulated pressure, the extended discharge system of the present invention is able to maintain a mass flow rate within a predetermined optimum range at any temperature of the fire-extinguishing material.

Abstract: A valve for controlling release of a pressurized fluid comprising a housing having a fluid chamber with an inlet and an outlet port. A piston within the housing is slidably movable between a sealed closed position and an open position. A collapsed support structure, when in a rigid condition retains the piston in the closed position. When the support means is in a collapsed condition, fluid pressure will cause the piston to slide to the open position of the valve. This support structure includes a pair of elongated supports oriented in one of a dead-center locked condition when the piston is sealed, and in an off-center collapsed condition allowing the piston to move to its open position.

Abstract: An air sampling and alarm control system for detecting the presence of a toxic contaminant in the atmosphere and for providing an audible alarm when insufficient gas flow is present in the system to adequately test for the presence of the contaminant. The alarm control is provided by a pressure switch which is electrically connected in circuit with an audible alarm and pneumatically connected in circuit with the gas flow line connecting the sampling pump to the sampling detector.

Abstract: The fluid sampler of the present invention comprises a single-acting pump assembly having a housing, an inlet port and an outlet port, a valve unit including a single inlet valve and a single outlet valve, a control diaphragm mounted in the housing to form a pumping chamber in communication with said inlet valve and said outlet valve, a reciprocative piston for reciprocating said control diaphragm, a motor for driving said piston with said piston being located in a substantially enclosed cavity separated from said pumping chamber by said control diaphragm and a damping assembly integrated in said pump housing for providing a highly damped fluid flow through said pump.

Abstract: A soap film gas flowmeter comprising a hollow flow tube having opposite open ends through which a soap bubble is propelled with one open end extending into a first closed chamber housing the soap solution and the opposite open end extending into a second chamber. Inlet gas is fed into the first chamber, passed through the flowtube and discharged from the second chamber. A manually movable piston like member is provided for generating a soap bubble at the bottom open end of the flowtube. The flowtube has an opening in it for providing an open passageway for inlet gas to pass through the flowtube when the bottom open end of the flowtube is covered by the soap solution.

Abstract: Apparatus for indicating at a visually accessible location remote from an object whether the temperature of that object is then at or has at some time exceeded a certain predetermined temperature including a sensor assembly adapted to be fastened to the object, an indicator assembly located in the visually accessible location and a transmission member connecting the sensor and indicator assemblies. The sensor assembly includes in the preferred embodiment a pair of members releasably secured to each other by a fusible material whose fusion temperature is approximately that of the predetermined temperature to be indicated. The indicator assembly includes a plunger slidably disposed within a housing normally hidden from view and biased towards an exposed position.