Electricity: circuit makers and breakers – Multiple circuit control – Pivoted contact
Patent
1989-06-30
1991-03-19
Tolin, Gerald P.
Electricity: circuit makers and breakers
Multiple circuit control
Pivoted contact
73723, 200 83P, 2003021, H01H 3534
Patent
active
050013173
ABSTRACT:
A pneumatic switch unit includes a switch housing. A conductive contact spring is mounted between diametric supports, one being adjustable. The spring has a central actuator arm and an offset contact arm interconnected to an encircling frame. A two piece switch actuator has clamp members clamped to the actuator arm. Separate end closure members secured to the switch housing ends. The closure member may clamp a diaphragm against the housing, with the diaphragm engaging the actuator. The closure member may have a mechanical actuating member or a simple closure plate engaging the actuator. The two switch housings may be mounted to the opposite sides of a single pressure chamber with end diaphragms closing the opposed ends of the switch housing. The pressure actuates both switch units to establish a sequence switch unit. The spring has a rectangular frame with a central opening having an actuating arm therein. The opposite spring ends are mounted in supports one of which is adjustable. A contact arm is secured to one end and projects parallel to the side. The opposite spring corner includes a notch to control the snap action. An alternate spring has an annular ring with a chordal actuator arm and a chordal contact arm. The spring is mounted on a line perpendicular to the two arms.
REFERENCES:
patent: 3436502 (1969-04-01), Egli
patent: 3535480 (1970-10-01), Bahniuk
patent: 3862387 (1975-01-01), Phillips et al.
patent: 4081638 (1978-03-01), Rice
patent: 4267413 (1981-05-01), Reis
patent: 4330695 (1982-05-01), Poling
patent: 4456801 (1984-06-01), Lauritson
Atkinson Louis D.
Smith Terence T.
Atkinson Louis D.
Tolin Gerald P.
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