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Browse Prior Art Database

Document Level Detector and Counter

IP.com Disclosure Number: IPCOM000097596D
Original Publication Date: 1961-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Schenk, CH: AUTHOR [+2]

Abstract

The document level detector and counter comprises two crystal pickup cartridges A and B. When a manual start switch 1 is closed, a hopper deck clutch relay 2 is energized to raise the hopper deck until the top document on the deck deflects the probe of cartridge A. This gives an output voltage which through an amplifier 3 and driver 4 drops relay 2 to stop the rise. As documents are fed from the deck, the probe of cartridge B deflects an amount corresponding to the thickness of each document, resulting in a voltage output from cartridge B via amplifier 5 to counter 6.

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Document Level Detector and Counter

The document level detector and counter comprises two crystal pickup cartridges A and B. When a manual start switch 1 is closed, a hopper deck clutch relay 2 is energized to raise the hopper deck until the top document on the deck deflects the probe of cartridge A. This gives an output voltage which through an amplifier 3 and driver 4 drops relay 2 to stop the rise. As documents are fed from the deck, the probe of cartridge B deflects an amount corresponding to the thickness of each document, resulting in a voltage output from cartridge B via amplifier 5 to counter 6.

After a certain number of documents is fed, counter 6 through a driver 7 energizes relay 2 to raise the deck until it is stopped by operation of cartridge A. A differential voltage detector 8 operates through a driver 9 if there is no voltage output (no document fed) or if there is a double voltage output (two documents fed) to energize a relay 10 to stop the drive motor and hence the machine. Detector 8 is ineffective to cause such stoppage so long as documents are fed singly.

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