Timing device for accumulating a telephone long distance call ch

Details Timing device for accumulating a telephone long distance call ch Timing device for accumulating a telephone long distance call ch

1977-04-05

1979-03-27

Witkowski, Stanley J.

58152T, 58 23R, 58 395, 58 57, 58 74, G04B 4706, G04C 2306, G07C 100

Patent

active

041458737

ABSTRACT:
A timing device for accumulating a telephone long distance call charge. It is basically a modified stopwatch, and must be used in conjunction with a push-button calculator incorporating the "automatic constant" function. The stopwatch has been altered so that a specially-designed piece of plastic or metal, replacing the second hand, forces a pin through the bottom of the casing, once per revoluton (i.e. once a minute). This pin depresses the "automatic constant" key, thereby adding the pre-programmed cost of the call for that minute to a running sub-total. A spring brings the pin back to its original position, and the cycle is repeated, unless stopped.

REFERENCES:
patent: 2629781 (1953-02-01), Feinstein
patent: 3018613 (1962-01-01), Jaccard

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