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Motorized Coupling for Typehead Rotate Selection

IP.com Disclosure Number: IPCOM000048223D
Original Publication Date: 1981-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Brown, CG: AUTHOR

Abstract

A print carrier such as that found in the IBM SELECTRIC typewriter or in other similar moving print carrier typewriters, the rotate system may be replaced with a rotate selection motor 10 which, in turn, may be connected to the lower ball socket of the rocker selection system. Lower ball socket 12 acts to transmit any rotary force received to the typehead 14. Upon modification of the carrier, it is desirable to maintain the weight of the rocker portion of the print module 16 at a minimum. The rocker carries the lower ball socket and other support for the type element 14 and pivotally mounted on rocker pivot shaft 18 to impact typehead 14 onto the platen 20.

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Motorized Coupling for Typehead Rotate Selection

A print carrier such as that found in the IBM SELECTRIC typewriter or in other similar moving print carrier typewriters, the rotate system may be replaced with a rotate selection motor 10 which, in turn, may be connected to the lower ball socket of the rocker selection system. Lower ball socket 12 acts to transmit any rotary force received to the typehead 14. Upon modification of the carrier, it is desirable to maintain the weight of the rocker portion of the print module 16 at a minimum. The rocker carries the lower ball socket and other support for the type element 14 and pivotally mounted on rocker pivot shaft 18 to impact typehead 14 onto the platen 20.

It is necessary, in order to insure proper rotate selection of the typehead 14, to maintain driving engagement between the lower ball socket 12 and the rotate selection motor 10. This is accomplished by a pinion gear 22 and lower ball socket gear 24 being meshed together. To insure that the mesh remains during rotation of the rocker about its pivot shaft 18 carrying with it gear 24, lower ball socket 12 and typehead 14, the center line of pivot shaft 18 should be placed such that the intersection of the outer circumference of the gear teeth on pinion gear 22 and the upper surface of gear 24 defines the center line of the rocker pivot 18.

In an alternate embodiment (Fig. 2), this particular placement insures that there is a positive engagement between pinion gear...