Electrical appliance programming

Patent · Mon Dec 15 23:00:00 EST 1986

OSTI ID:6861017

Mahon, J J

This patent describes a control system for a microwave oven comprising: (a) a timing means operable upon connection to a source of power to rotate at a substantially constant rate; (b) magnetron means operable, upon connection to a source of power, to effect microwave radiation for cooking; (c) first switch means series connected with the magnetron means and operative upon actuation to connect the magnetron means to power circuit means; (d) second switch means series connected with the timer means and operative for connecting the timer means and the first switch means to the power source; (e) main rotary cam means including; (i) timing cam means and first cam follower means operative to affect actuation of the second switch means; (ii) defrost cam means and second cam follower means operative to effect actuation of the first switch means. The defrost cam means operative upon advancement to effect sequentially varying periods of actuation of the first switch means; (iii) advance means connected to the timing means and operative to advance the defrost and timing cam means at a preselected one of at least two rates. The timing cam track is operative to maintain the second switch means closed for a given time interval and the defrost cam means is operative to effect cycling of the first switch means at predetermined subintervals of the given time interval. The timing cam means and defrost cam means are advanced together at one of the preselected rates.

• Assignee: Eaton Corp., Cleveland, OH
• Patent Number(s): US 4629845
• OSTI ID: 6861017
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
42 ENGINEERING
420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)
APPLIANCES
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
DEFROSTING
ELECTRIC APPLIANCES
ELECTRICAL EQUIPMENT
ELECTRON TUBES
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
FOOD PROCESSING
MAGNETRONS
MICROWAVE EQUIPMENT
MICROWAVE OVENS
MICROWAVE TUBES
MOTION
OVENS
PROCESSING
PROGRAMMING
ROTATION
SWITCHES
TIMING CIRCUITS