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Permissive Reversible Escapement

IP.com Disclosure Number: IPCOM000098095D
Original Publication Date: 1960-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 76K

Publishing Venue

IBM

Related People

Lisinski, JE: AUTHOR [+2]

Abstract

In tape feeds it is often desirable to reverse the direction of the tape driving member. In this escapement the drive is provided through a belt 10 and fluid type clutch 11 to a shaft 12. The clutch comprises a housing 14 formed with an oil cavity 15 containing blades 16. The housing has bearings for the shaft 12 and is provided with a V notch for belt 10. Secured to shaft 12 is a rotor 17 having blades 18 that are complementary to blades 16. Escapement wheels 20 and 21 are secured to shaft 12 with their teeth in complementary relation, i.e., a tooth on one longitudinally opposite a space on the other.

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Permissive Reversible Escapement

In tape feeds it is often desirable to reverse the direction of the tape driving member. In this escapement the drive is provided through a belt 10 and fluid type clutch 11 to a shaft 12. The clutch comprises a housing 14 formed with an oil cavity 15 containing blades 16. The housing has bearings for the shaft 12 and is provided with a V notch for belt 10. Secured to shaft 12 is a rotor 17 having blades 18 that are complementary to blades 16. Escapement wheels 20 and 21 are secured to shaft 12 with their teeth in complementary relation, i.e., a tooth on one longitudinally opposite a space on the other.

Also secured to the shaft 12 is a sprocket wheel 22 for a tape drive. Mounted in a bracket 23 is a pair of pawls 24 and 25 that are connected to bell cranks 26 and 27 pivotally mounted on a stub shaft 28. The bell cranks are rocked in a counterclockwise direction against the bias of leaf springs 30 by a plunger 31. The plunger is formed with a notch 32 that cooperates with a head 33 on a second plunger 34 formed with a shoulder 35 carrying a guide comb 36 for an interposer 37.

The interposer is pivoted on armature 38 which extends from 40 between two magnets 41 and 42. The plunger 34 is reciprocated by a two-lobe cam 43. With magnet 41 operated, the interposer 37 is inserted between plungers 31 and 34 and a high spot on cam 43 rocks bell cranks 26 and 27. Pawl 25 is withdrawn from wheel 21 permitting shaft 12 to rotate until pawl 24...