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Thyratron Light Shutter with Automatic Latching Action

IP.com Disclosure Number: IPCOM000094842D
Original Publication Date: 1965-Jun-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Nassimbene, EG: AUTHOR

Abstract

This latchable light shutter utilizes an elongated flexible strip 10 coated on one side with a metallic material 11. Strip 10 is attached at one end to fixed, metallic member 12. The remainder of strip 10 is permanently curved away from member 12. By closing switch 13, voltages of opposite polarities are applied to member 12 and coating 11. This causes strip 10 to be attracted to member 12. Thus, member 10 folds itself upon the surface of member 12. That is, the point of initial contact between them moves away from the point of attachment until flexible member 10 assumes the down position shown by dotted lines 14. 10 acts as a light shutter allowing light to pass when it is attracted to the fixed member 12.

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Thyratron Light Shutter with Automatic Latching Action

This latchable light shutter utilizes an elongated flexible strip 10 coated on one side with a metallic material 11. Strip 10 is attached at one end to fixed, metallic member 12. The remainder of strip 10 is permanently curved away from member 12. By closing switch 13, voltages of opposite polarities are applied to member 12 and coating 11. This causes strip 10 to be attracted to member 12. Thus, member 10 folds itself upon the surface of member 12. That is, the point of initial contact between them moves away from the point of attachment until flexible member 10 assumes the down position shown by dotted lines 14. 10 acts as a light shutter allowing light to pass when it is attracted to the fixed member
12. Strip 10 blocks the light path when the voltage is released and the curvature of strip 10 acts as a spring bringing it into the up position.

Coating 11 is extended around the free end of strip 10. Contact 18 is located under the end of strip 10. Contact 18 is connected by switch 19 to a voltage potential 20. The latter is equal to that applied to coating 11 by switch 13. Thus, as strip 10 is attracted to member 12, coating 11 touches contact 18. This continues to apply a voltage to coating 11 even though the original signal 13 is turned off. Thus, a latching action is realized.

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