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Browse Prior Art Database

Handle Breakaway System

IP.com Disclosure Number: IPCOM000090324D
Original Publication Date: 1969-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Black, DE: AUTHOR [+3]

Abstract

The protection device is for use in a production environment for a nonpowered card reader. In this environment, such a reader can be subjected to excessive operator initiated forces which can damage many elements in the reader. Actuator handle A is connected to driving pulley C through relatively stiff spring B. Handle A rotates on the same shaft as pulley C, however, it is connected to C only through spring B. This is preloaded to hold handle A against stop F attached to pulley C. When handle A is subjected to a high force or excessive velocity, the pretension force of spring B against stop F is exceeded. Spring B extends and handle A moves independently of pulley C. The energy stored in extended spring B provides the necessary motive force which is controlled by governor D. This drive system provides two advantages.

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Handle Breakaway System

The protection device is for use in a production environment for a nonpowered card reader. In this environment, such a reader can be subjected to excessive operator initiated forces which can damage many elements in the reader. Actuator handle A is connected to driving pulley C through relatively stiff spring B. Handle A rotates on the same shaft as pulley C, however, it is connected to C only through spring B. This is preloaded to hold handle A against stop F attached to pulley C. When handle A is subjected to a high force or excessive velocity, the pretension force of spring B against stop F is exceeded. Spring B extends and handle A moves independently of pulley C. The energy stored in extended spring B provides the necessary motive force which is controlled by governor D. This drive system provides two advantages. It prevents operator inflicted damage due to excessive force applied to the operating handle. It permits maximum card reading speed to be controlled by a protective governor regardless of the velocity imparted to handle A.

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