Electricity: circuit makers and breakers – Special application – Actuated concurrently with operation or use of art device
Patent
1994-02-15
1996-12-10
Scott, J. R.
Electricity: circuit makers and breakers
Special application
Actuated concurrently with operation or use of art device
137560, H01H 906
Patent
active
055833276
ABSTRACT:
The apparatus, which controls the operation and speed of an electrical blower motor and the operation of a vacuum operated recirculation control device, comprises a vacuum switch combined with an electrical switch having a rotary shaft and fixed and movable contacts whereby rotation of the shaft controls the operation and speed of the blower motor. The shaft is pushable rearwardly and is spring-biased forwardly for operating the vacuum switch whereby vacuum is selectively supplied to the recirculation control device for switching between outside air and recirculation of air. A push-push latching mechanism is provided for alternately latching the vacuum switch in one position and releasing the vacuum switch for return movement to its other position.
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patent: 4517422 (1985-05-01), Black, III et al.
patent: 4679588 (1987-07-01), Raab et al.
patent: 4716264 (1987-12-01), Toulouse
patent: 4994635 (1991-02-01), Cummings et al.
patent: 5420387 (1995-05-01), Cummings
Indak Manufacturing Corp.
Scott J. R.
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