Electronic slide ruler calculator

Details Electronic slide ruler calculator Electronic slide ruler calculator

1977-02-25

1978-06-13

Smith, Jerry

Boots, shoes, and leggings

33125R, 364561, 364709, G06F 738, G06F 300

Patent

active

040952738

ABSTRACT:
An elongated ruler member has a plurality of spaced electrically conductive contacts thereon. A slidably mounted distance marker on the ruler member has electrically conductive contacts thereon. A calculator circuit electrically connected to the contacts on the ruler member indicates the exact position of the distance marker when such marker is manually moved in position so that the contacts of the marker make electrical contact with contacts of the ruler member directly thereunder.

REFERENCES:
patent: 3777126 (1973-12-01), Hoff
patent: 3955073 (1976-05-01), Carew et al.
patent: 4007364 (1977-02-01), Ojima et al.

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