Browse Prior Art Database

Photo Binary Logical or Component

IP.com Disclosure Number: IPCOM000098849D
Original Publication Date: 1958-Jun-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Litz, FA: AUTHOR [+2]

Abstract

The disclosed device is a conveniently packed photo binary logical or component and includes a center post 10, made of suitable insulating material such as pyrex, which is affixed to a tube base 11. The post 10 is coated with a photoconductive material and several spaced conductive rings 12 are mounted on the post in ohmic contact with the photoconductive surface. The outside rings 12a and 12c may connect to one base terminal 13a, the center ring 12b being connected to the terminal 13b. Several neon lamps 14 are mounted around the post 10, one lead of each neon connecting to a common base terminal 13c and the other leads thereof connecting to other corresponding terminals 13 which provide the input terminals to the or circuit.

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Photo Binary Logical or Component

The disclosed device is a conveniently packed photo binary logical or component and includes a center post 10, made of suitable insulating material such as pyrex, which is affixed to a tube base 11. The post 10 is coated with a photoconductive material and several spaced conductive rings 12 are mounted on the post in ohmic contact with the photoconductive surface. The outside rings 12a and 12c may connect to one base terminal 13a, the center ring 12b being connected to the terminal 13b. Several neon lamps 14 are mounted around the post 10, one lead of each neon connecting to a common base terminal 13c and the other leads thereof connecting to other corresponding terminals 13 which provide the input terminals to the or circuit. The assembly may be enclosed in an opaque shield 15 to isolate the operating elements from ambient light. Thus, when any one or more of the neons 14 are ignited by connecting an input voltage to one or more of the input terminals the impedance between terminals 13a and 13b is materially reduced for providing the logical or function. To improve the photo response time, by maintaining the photoconductive material in an active state, a spot of radioactive luminescent compound 16 may be disposed within the shield, as shown in the drawing.

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