Electrical counter having plural unit value registers

Details Electrical counter having plural unit value registers Electrical counter having plural unit value registers

1990-10-22

1992-02-18

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Systems

Identifying or correcting improper counter operation

377 26, 377 15, 36494492, H03K 2140

Patent

active

050900331

ABSTRACT:
An autoclave or other equipment has a counter provided by an EEPROM for counting the number of times the autoclave has been used. The EEPROM has a first set of ten registers which contain the unit value of the count together with a fault code associated with the last use of the autoclave. Two further registers contain the hundreds and tens, and the ten thousands and thousands value of the count. The tens value in one of the further registers is used to determine in which of the registers of the first set the units value is stored, so that each of the registers in the first set is only written into ten times for every hundred counts, thereby extending the life of the EEPROM. Another register in the EEPROM contains information about the nature of the autoclave.

REFERENCES:
patent: 4223379 (1980-09-01), Simcoe
patent: 4663770 (1987-05-01), Murray et al.
patent: 4757522 (1988-07-01), Kieselstein
patent: 4807264 (1989-02-01), Bauer
patent: 4947410 (1990-08-01), Lippmann et al.
patent: 4993051 (1991-02-01), Feldbrugge

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