Browse Prior Art Database

Actuator for Perforated Media Reader

IP.com Disclosure Number: IPCOM000091048D
Original Publication Date: 1969-Sep-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Brearley, FW: AUTHOR [+6]

Abstract

This perforated media reader employs slideable actuators, one per column, which are translated across the media and deposited on the media whenever a perforation in the column is encountered. The actuators when deposited actuate switches which are scanned to determine the data content of the media.

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Actuator for Perforated Media Reader

This perforated media reader employs slideable actuators, one per column, which are translated across the media and deposited on the media whenever a perforation in the column is encountered. The actuators when deposited actuate switches which are scanned to determine the data content of the media.

In certain adverse environmental applications, such as foundries, machines shops, etc. the media is subjected to contamination which increases the friction between the slideable actuator and the media. The friction causes increased wear on the plastic actuators. To extend the life of the actuators, steel inserts are employed to reduce wear, however, with a resultant increase in friction which causes the actuators to jam and damage the media when translated across it.

A two-fold solution to the problem is used. The drive mechanism for the actuators is modified so as to substantially reduce the component tending to rotate the actuator during translation. However, once the actuator nose enters an aperture in the medium, the drive mechanism provides the necessary rotational force for causing the actuator to rotate and disengage from the drive mechanism. In addition, the actuators are provided with a force limiter or braking mechanism which cooperates with the back plate to counter the self-energizing rotational force due to the friction between the nose of the actuator and the medium. The braking or limiting action is not effective once...