Browse Prior Art Database

Code Reading Mechanical Scanning Gun

IP.com Disclosure Number: IPCOM000097372D
Original Publication Date: 1962-Oct-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Grabowski, WL: AUTHOR [+2]

Abstract

Scanning of a visual code by a hand held lens-photocell arrangement can produce an unacceptable signal output. This is due to misalignment of the scanning mechanism with respect to the code and variations in scanning velocity and illumination.

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Code Reading Mechanical Scanning Gun

Scanning of a visual code by a hand held lens-photocell arrangement can produce an unacceptable signal output. This is due to misalignment of the scanning mechanism with respect to the code and variations in scanning velocity and illumination.

A lens-photocell arrangement is mounted on scanning arm 1 which is pivoted about shaft 2. Application of pressure to trigger 3 causes linkage 4 to pivot about shaft 5 and to contact cam ledge 6. Continued pressure on 3 causes 4 acting upon 6 to cause 1 to swing to its leftmost scanning position. As 4 moves forward, it is caused by surface 7 to steadily move away from contact with 6. At some point, 4 is disengaged from 6 and 1 is caused to fly back to its rightmost position by action of spring 8 which is compressed as 1 is moved to its leftmost position. When 3 is released, spring 9 causes 4 to move back into position to engage 6 upon application of pressure to 3.

A light source is imaged, by means of a lens mounted under 1, onto the area of the code being scanned to provide uniform illumination.

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