POWER SUPPLY CONTROL CIRCUIT FOR 120 VOLT COMBINATION WASHER AND DRYER

• US 3,824,813 A
• Filed: 02/26/1973
• Issued: 07/23/1974
• Est. Priority Date: 02/26/1973
• Status: Expired due to Term

• Current Assignee: Ted C. Davis
• Original Assignee: Ted C. Davis
• Inventors: Davis, Ted C.
• Primary Examiner(s): Hornsby, Harvey C.
• Assistant Examiner(s): Coe, Philip R.
• Application Number:
  US05/335,581
• Time in Patent Office: 512 Days
• Field of Search: 68/12R,19,19.2,20
• US Class Current: 68/12.15
• CPC Class Codes: D06F 2103/38 Time, e.g. duration
• CPC Class Codes: D06F 2103/46 of the motor driving the drum
• CPC Class Codes: D06F 2105/00 Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
• CPC Class Codes: D06F 2105/28 Electric heating
• CPC Class Codes: D06F 2105/46 Drum speed; Actuation of motors, e.g. starting or interrupting
• CPC Class Codes: D06F 23/02 and rotating or oscillating about a horizontal axis
• CPC Class Codes: D06F 25/00 Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air control of washing or of washing and drying D06F33/00, D06F34/00; domestic laundry dryers D06F58/00
• CPC Class Codes: D06F 29/00 Combinations of a washing machine with other separate apparatus in a common frame or the like, e.g. with rinsing apparatus
• CPC Class Codes: D06F 29/005 the other separate apparatus being a drying appliance
• CPC Class Codes: D06F 33/68 of the sequence of washing and drying operations
• CPC Class Codes: D06F 34/06 Timing arrangements
• CPC Class Codes: D06F 34/08 Control circuits or arrangements thereof
• CPC Class Codes: D06F 34/10 Power supply arrangements, e.g. stand-by circuits

Abstract

This invention relates to a control circuit for a combination clothes washer and dryer adapted to operate on a 120 volt, 15 ampere, electrical supply. The control circuit includes a heat lockout relay energizeable to disconnect the dryer heater and dryer timer motor when the washer motor is in operation, thereby to limit the electrical current required by washer and/or dryer to the 15 ampere supply available. The circuit permits clothes tumbling to continue with unheated room air during washer motor operation.

Claims

1. In a combination clothes washer and dryer wherein said washer includes a tub adapted to contain clothes to be washed, an agitator adapted for agitating clothes in said tub for washing said clothes, a washer motor for driving said agitator and a washer timer including a washer motor switch connected to one side of said washer motor for selectively operating said washer motor and wherein said dryer includes a tumbling drum adapted to contain clothes after said washing, a blower for blowing a stream of air through said tumbling drum, a dryer motor for driving said tumbling drum and blower to tumble said clothes in said air stream, a heater in heat exchange relation with the air stream for drying said clothes in a stream of heated air, and a dryer timer including a dryer motor switch connected to one side of said dryer motor for selectively operAting said dryer motor and a heater switch connected to one side of said heater for selectively operating said heater and a dryer timer motor for opening and closing said dryer timer switches through a predetermined time cycle, the invention comprising a power supply control circuit adapted to energize said combination washer and dryer from a 15 ampere domestic power supply without exceeding the fused limits thereof, said circuit including first power supply means connecting one side of said power supply to the timer switches for said washer motor, dryer motor and heater, said washer motor switch being in parallel with said dryer motor switch and said heater switch, said dryer timer motor being connected to said first power supply means through said dryer motor timer switch, and second power supply means connecting the other side of said power supply to the other side of said washer motor, dryer motor, dryer timer motor and heater, said second power supply means including a relay switch in series with said dryer timer motor and said heater, and actuating means in series with said washer motor switch for opening said relay switch whenever said washer motor switch is closed, whereby to prevent the operation of said heater and said dryer timer motor whenever said washer motor is conditioned for operation, said dryer motor remaining in condition for operation through said dryer motor switch irrespective of said relay switch whereby to tumble said clothes in a stream of unheated air whenever said washer motor is conditioned for operation.