Registers – Calculators – Input-output calculator to indicator – printer – etc.
Patent
1976-04-09
1977-08-23
Cook, Daryl W.
Registers
Calculators
Input-output calculator to indicator, printer, etc.
200 46, G06K 704, H01H 4308
Patent
active
040442306
ABSTRACT:
In a perforated tape reader, the tape is sensed by detecting elements rotatable on one end of rocker arms. The other end of the rocker arms is provided with a fork. A flat spring urges on the upper arm of the fork and a conductive resilient element is engaged between the arms of the fork. When the detecting elements sense a perforation on the tape, the conductive element abuts against a fixed electric contact in a intermediate position between the arms of the fork; when the detecting elements sense no perforation the lower arm of the fork lifts the conductive element in order to open the electric contact.
Since the space between the arms of the fork is greater than the thickness of the conduction element, but less than the shifting of the fork, any small amplitude movements of the rocker arms in not transmitted to the conductive element.
REFERENCES:
patent: 3304410 (1967-02-01), Blodgett
patent: 3683156 (1972-08-01), King et al.
Cook Daryl W.
Ing. C. Olivetti & C. S.p.A.
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