Browse Prior Art Database

Positioning Device

IP.com Disclosure Number: IPCOM000098846D
Original Publication Date: 1958-Jun-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Haug, RL: AUTHOR [+2]

Abstract

This apparatus is provided for moving an object such as a transducer to a selected position or track in response to a binary coded address signal. A drive pinion 1 reciprocates linearly through continuous cycles of operation, which cycles of operation include a series of binary coded displacements in a first direction followed by similar binary coded displacements in the opposite direction. A transducer supporting rack 2 is engaged with the pinion 1 on one side thereof, and an idler rack 3 is engaged with the pinion on the other side thereof. A selector pawl 4 is positioned between the two racks 2 and 3 and may be selectively moved to engage and hold one of the racks.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 88% of the total text.

Page 1 of 2

Positioning Device

This apparatus is provided for moving an object such as a transducer to a selected position or track in response to a binary coded address signal. A drive pinion 1 reciprocates linearly through continuous cycles of operation, which cycles of operation include a series of binary coded displacements in a first direction followed by similar binary coded displacements in the opposite direction. A transducer supporting rack 2 is engaged with the pinion 1 on one side thereof, and an idler rack 3 is engaged with the pinion on the other side thereof. A selector pawl 4 is positioned between the two racks 2 and 3 and may be selectively moved to engage and hold one of the racks. The rack not engaged by the selector pawls 4 will be translated by the movements of the drive pinion 1, and thus the desired positioning of the transducer may be accomplished by permitting the transducer rack 2 to move in accordance with the address information such that the total displacement of the transducer will equal the sums of the various desired displacements.

Since the drive pinion provides intermittent displacements in either direction, the transducer may move from one address position to the second address position without returning to a home position. This is accomplished by comparing, digit by digit, the binary numbers representative of the two address positions and by then moving the transducer head forwardly or backwardly in response to the positive or negative valu...