Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1996-11-05
1998-04-28
Tolin, Gerald P.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
200835, 4034091, H01H 3538
Patent
active
057447713
ABSTRACT:
A pressure switch has a housing with an interior bore extending from one end to the other. A rod slidable within the bore and operated by external fluid pressure extends between a piston at one end of the housing and a mechanically operated electrical switch at the other end of the housing. A spring is disposed about the rod between a first stop on the rod and a second stop on the housing. The spring provides resistance against movement of the rod under external pressure. The resistance of the spring to movement is adjusted by a sleeve engaging the spring, with the sleeve threaded into the bore of the housing for movement longitudinally within the housing. A split ring wedged between two other rings resists movement of the rod to longitudinal movement.
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Camrose Electric Controls Ltd., Edmonton, Alberta, Canada, Parts RS73 Pressure Controls, 1 page, 1993.
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Barber Industries Ltd., Edmonton, Canada, Pressure Sensing Types, Switch Arrangement Types, 2 pages, date of publication not known but precedes filing date of application.
Argus Machine Co. Ltd.
Lambert Anthony R.
Tolin Gerald P.
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