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Browse Prior Art Database

Bidirectional Lead Screw Control

IP.com Disclosure Number: IPCOM000078600D
Original Publication Date: 1973-Feb-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 70K

Publishing Venue

IBM

Related People

Shuman, RB: AUTHOR

Abstract

Lead screw 10 can be yieldably driven either clockwise or counterclockwise by mechanism, not shown. Pawl 11 engages ratchet 12 to arrest lead screw rotation under the control of electromagnet 13. De-energization of electromagnet 13 allows pawl 11 to move upwardly into the space between teeth of ratchet 12 by spring 14. Plates 15, 16 and rubber cushion 17 sandwiched therebetween are held by bolts 18 on mounting bracket 19. Impact between the teeth of ratchet 12 and pawl 11 is delivered to cushion 17 by the rotation of either plate 15 or plate 16 to the broken line positions shown, depending upon the rotational direction of lead screw 10.

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Bidirectional Lead Screw Control

Lead screw 10 can be yieldably driven either clockwise or counterclockwise by mechanism, not shown. Pawl 11 engages ratchet 12 to arrest lead screw rotation under the control of electromagnet 13. De-energization of electromagnet 13 allows pawl 11 to move upwardly into the space between teeth of ratchet 12 by spring 14. Plates 15, 16 and rubber cushion 17 sandwiched therebetween are held by bolts 18 on mounting bracket 19. Impact between the teeth of ratchet 12 and pawl 11 is delivered to cushion 17 by the rotation of either plate 15 or plate 16 to the broken line positions shown, depending upon the rotational direction of lead screw 10.

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