Control of self-test feature for appliances or electronic equipm

Details Control of self-test feature for appliances or electronic equipm Control of self-test feature for appliances or electronic equipm

1976-12-10

1979-06-19

Smith, Jerry

Registers

Systems controlled by data bearing records

Time analysis

3403094, 364900, G06F 1104

Patent

active

041584325

ABSTRACT:
A microwave oven is disclosed as a typical appliance controlled by a microprocessor device. The oven has an LED digital display, a number of indicator LED's, and a capacitive touch keyboard, along with circuits for controlling a magnetron, a broiler unit, and a blower. A "self-test" feature causes the system to sequence through test routines whereby all LED's are lighted in a set order, each digit of the display counts up from 0 through 9, keyboard inputs entered are displayed as a code, and the magnetron and broiler are turned on. The test is initiated by control switches separate from the keyboard so that the keyboard can be bypassed.

REFERENCES:
patent: 3829842 (1974-08-01), Langdon et al.
patent: 3855461 (1974-12-01), Stockwell
patent: 3866171 (1975-02-01), Loshbough
patent: 4011428 (1977-03-01), Fosnough et al.
patent: 4028536 (1977-06-01), Woodward
patent: 4034194 (1977-07-01), Thomas et al.
C. J. Duggan, Jr., "Microprogrammed Diagnostics for I/O Attachments" IBM Tech. Disc. Bull., vol. 15 No. 7 12-1972, pp. 2073-2075.

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