Resettable counting mechanism

Details Resettable counting mechanism Resettable counting mechanism

1975-04-14

1976-06-15

Jackmon, Edith Simmons

Registers

Zero-setting devices

Separate shaft

235 1C, 235 92C, 235131FD, G06C 1542, G06C 2502

Patent

active

039639037

ABSTRACT:
A low cost resettable counting mechanism comprising an electromagnetic indexing mechanism and a counter stepped by the indexing mechanism having three-piece higher order number wheels with respective unitary molded plastic reset and drive pawl members for connecting the number wheels for counting and resetting purposes. A detent arm integrally formed with the number wheel shaft engages a recess in the counter viewing crystal to hold the countershaft against rotation during counting and the counter shaft is manually rotatable for resetting the higher order number wheels. A clapper and plastic verge of the indexing mechanism interfit to retain them in assembled relationship.

REFERENCES:
patent: 1311173 (1919-07-01), Mann
patent: 2331884 (1943-10-01), Bliss
patent: 2444570 (1948-07-01), Lawrence et al.
patent: 2494955 (1950-01-01), Mayer et al.
patent: 2636680 (1953-04-01), Summers
patent: 3471085 (1969-10-01), Soupenne
patent: 3576974 (1969-09-01), Knox

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