Sequential switching device
AssigneesBilly R. Rayburn, Paul T. Mu, Alfred F. Hayes
InventorBilly R. Rayburn
Life of this patent
Estimating the term…
Abstract
A latching circuit is inserted between the door switch of a dryer or any other unattended device and the operating components thereof. Thus when the door switch is opened the circuit is unlatched and a subsequent closure of the door will not resume operation of the device. To allow for such resumption a push-to-close switch is included across the latching circuit whereby a sequence of closing the door switch followed by manual depression of the push-to-close switch will restart the device.
Claims1
In an automated appliance including a door for receiving articles, a source of electrical power, a door switch connected between said source of electrical power and adapted to be articulated to a closed state when said door is closed, and operating means operatively connected to said door switch, the improvement comprising:
- a first normally open switch connected in circuit between said door switch and said operating means;
- a second normally open switch connected in circuit with said door switch;
- coil means connected in circuit with said second normally open switch for pulling in said first and second normally open switch upon receiving electrical excitation from said source of electrical power, said second normally open switch and said coil being disposed in a parallel circuit with said first normally open switch and said operating means;
- and
- a third normally open switch formed as a push-to-close palm button adapted for manual articulation and connected in parallel with said second normally open switch for providing a parallel path between said door switch and said coil means.
Dependencies are inferred from the claim text.