Photo-optical snap-on paper path sensor

Details Photo-optical snap-on paper path sensor Photo-optical snap-on paper path sensor

1982-04-21

1984-06-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Housings

250223R, H01J 502

Patent

active

044544197

ABSTRACT:
A snap-on unitary, one piece photo-optical item position sensor fabricated as a clothes-pin-like plastic member from a material which is substantially transparent to infra-red radiation obviating lenses. The sensor member is bifurcated at one end to form two parallel leg portions the outboard end of each one of which carries one element of the photo-optical sensing apparatus. The opposite end of the sensor member is rectangularly shaped and slotted on opposite parallel sides forming a polarized receptacle for a mating polarized plug as well as a handle for griping. Compression of the handle portion contacts the slotted end slightly while opening or spreading the two parallel leg portions enabling the sensor to be snapped over an orthogonally disposed item guide or track. Oppositely disposed parallel members on the lower portion of the track automatically position the sensor over the track. A notch in the lower track permits the optical sensing apparatus to be axially aligned perpendicular to the item guide/track.

REFERENCES:
patent: 3906240 (1975-09-01), Jeffree

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