Browse Prior Art Database

Railroad Car Surveillance

IP.com Disclosure Number: IPCOM000098041D
Original Publication Date: 1961-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Lang, WW: AUTHOR [+2]

Abstract

The identity of railroad car 1 is determined by flux patterns of an array 2 of magnets that have high and low permeability characteristics as they pass receiver 3. High permeability magnets 4 are arranged with low permeability magnets 5 according to a code. The magnets represent binary ones so the array 2 represents 0101101010.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Railroad Car Surveillance

The identity of railroad car 1 is determined by flux patterns of an array 2 of magnets that have high and low permeability characteristics as they pass receiver 3. High permeability magnets 4 are arranged with low permeability magnets 5 according to a code. The magnets represent binary ones so the array 2 represents 0101101010.

Receiver 3 consists of iron core 6 with primary winding 7, that is driven by A.
C. source 8, and two secondary windings 9 and 10. Windings 9 and 10 are wound series opposing. The number of turns on windings 9 and 10 is selected so that the output potential across terminals 11 and 12 is zero, when receiver 3 is isolated from other magnetic materials.

Receiver 3 has a small air gap 13 in portion A and a large air gap 14 in portion B. Passage of any high permeability magnet in proximity to longer gap 14 (dashed outline 15) results in increased flux density in portion B of receiver 3, and the development of an A.

C. voltage at out put terminals 11 and 12. This voltage is subsequently rectified and detected. Ones and zeros are distinguished by the influence or lack of influence of their corresponding elements on the reluctance of the receiver's magnetic circuit.

1

Page 2 of 2

2

[This page contains 3 pictures or other non-text objects]