ELECTROMECHANICAL INTERLOCK FOR LAUNDRY APPARATUS
First Claim
1. Door interlock for a clothes washing machine having an access door to The washing apparatus and suitable circuitry including a timer for controlling the operation thereof, said interlock comprising:
- a manually actuatable switch;
a timer-actuated switch;
movable means for normally locking said door when said door is in a closed position;
solenoid means connected to said locking means for moving said locking means to an unlocking position when said solenoid is actuated; and
, a fluid pressure switch serially connected to said solenoid with said manually actuable switch and said timer-actuated switch and moved from an open to a closed position in response to the level of the washing fluid within said machine being at least below said access door.
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Abstract
Interlock for the door of a clothes washing machine or the like. The interlock is characterized by the provision of a solenoid-actuated door lock, which solenoid is operatively connected to a source of electrical power by means of a condition responsive structure and also by a manually operable switch. Energization of the solenoid serves to unlatch the door lock to thereby provide a '"'"''"'"''"'"''"'"'fail-safe'"'"''"'"''"'"''"'"' device, which can only be opened when the machine is not operating and by actuation of the manual operable switch.
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Citations
2 Claims
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1. Door interlock for a clothes washing machine having an access door to The washing apparatus and suitable circuitry including a timer for controlling the operation thereof, said interlock comprising:
- a manually actuatable switch;
a timer-actuated switch;
movable means for normally locking said door when said door is in a closed position;
solenoid means connected to said locking means for moving said locking means to an unlocking position when said solenoid is actuated; and
, a fluid pressure switch serially connected to said solenoid with said manually actuable switch and said timer-actuated switch and moved from an open to a closed position in response to the level of the washing fluid within said machine being at least below said access door.
- a manually actuatable switch;
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2. The door interlock of claim 1 wherein said fluid pressure switch is open whenever said washing machine contains washing fluid.
Specification
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- Resources
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Current AssigneeJohn D. Hughes
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Original AssigneeJohn D. Hughes
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InventorsHughes, John D.
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Primary Examiner(s)Price, William I.
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Application NumberUS04/807,712Time in Patent Office897 DaysField of Search68/12,139 134/57DL,58DL 4/292US Class Current68/12.26CPC Class CodesD06F 37/42 Safety arrangements, e.g. f...
