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Browse Prior Art Database

Magnetic Clutch Escapement

IP.com Disclosure Number: IPCOM000098425D
Original Publication Date: 1960-Oct-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Pittwood, DG: AUTHOR

Abstract

By utilizing an eccentric shaft to impart oscillatory motion to a conventional magnetic clutch this escapement mechanism features high speed, near harmonic output motion, reversal of output motion within one revolution of the input shaft and simple inexpensive design.

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Magnetic Clutch Escapement

By utilizing an eccentric shaft to impart oscillatory motion to a conventional magnetic clutch this escapement mechanism features high speed, near harmonic output motion, reversal of output motion within one revolution of the input shaft and simple inexpensive design.

An eccentric 10 on input shaft 11 acts in a forked rocker member 12 secured to a magnetic clutch 14 to rock the drive plate 15 to which it is secured. Plate 15 rocks back and forth a distance (in degrees of rotation) equal to the increment of intermittent motion desired at the output shaft 16. By means of a disk 17 secured to the input shaft 11 the operation of the magnetic clutch is timed by a photo diode 18 actuated by a lamp 19 through slots or holes in the disk.

This timing arrangement controls the energization of the magnetic clutch. The latter is thus enabled to couple its driving and driven members 15 and 20 when the rocker 12 is in one extremity of movement and release its members when the rocker is at the opposite extremity of movement. Thus, the output shaft 16 is rotated during 1/2 of the input shaft rotation but remains stationary during the other half of the input shaft rotation.

A spring loaded detent arm 21 and star wheel 22 are employed to retain registration of the output shaft when it is not being driven. The drive plate 15 of the clutch is mounted free running on the output shaft while the driven member 20 of the clutch is keyed to it.

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