Pneumatic switch for patient call system having multiple-positio

Details Pneumatic switch for patient call system having multiple-positio Pneumatic switch for patient call system having multiple-positio

1996-06-14

1998-04-07

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Flow-responsive type

128681, 200 83Z, 200505, 340573, H01H 3524

Patent

active

057367027

ABSTRACT:
A pneumatically actuated switching device is disclosed for forming a momentary electrical signal circuit with a receptacle of a patient call system utilizing a conductive plunger which slides in response to a pulse of pressurized air delivered to an internal chamber through a housing connection which provides for optional assembly orientations. A spring is used to maintain separation between a conductive plunger and the electrical components when the pneumatic switching device is not activated by a patient.

REFERENCES:
patent: 3823285 (1974-07-01), Dwyer
patent: 4150264 (1979-04-01), Lieberman
patent: 5113048 (1992-05-01), Lafferty
patent: 5155309 (1992-10-01), Dwyer
patent: 5461207 (1995-10-01), Van Lear

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