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Type Bar Velocity Transducer

IP.com Disclosure Number: IPCOM000098620D
Original Publication Date: 1959-Jun-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Simpson, HW: AUTHOR

Abstract

By measuring the velocity of type bars in a typewriter, it can be determined if any adjustment is needed to obtain the best printing of the different characters.

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Type Bar Velocity Transducer

By measuring the velocity of type bars in a typewriter, it can be determined if any adjustment is needed to obtain the best printing of the different characters.

A device for conveniently measuring the velocity comprises an arcuate member 1 of magnetic material having a wire coiled about it. The inner end of the member 1 is fixed to a ring 2 made of non-magnetic material and rotatably supported within a slotted ring 3 of magnetic material. The ring 3 is attached by screws to the comb 4 in place of the usual type bar guide. Fixed to the inner end of the member 1 is a permanent magnet 5 having sliding contact with the ring 3. The type bar 6 is pivotally supported between its ends by the comb 4 and forms part of the magnetic path for flux produced by the magnet. As the type bar moves along the member 1, a voltage is induced in the wire turns proportional to the bar speed. The member 1 is positionable adjacent any type bar by simply rotating the ring 2.

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