Browse Prior Art Database

Digital Thermal Microactivator

IP.com Disclosure Number: IPCOM000098618D
Original Publication Date: 1959-Jun-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Apgar, DH: AUTHOR [+2]

Abstract

A servo system containing an auxiliary positioning control for providing extremely accurate movement of the element to be controlled consists of an input 12 furnishing pulses to a counter 10 of a magnitude and phase indicative of the movement desired in the controlled element.

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Digital Thermal Microactivator

A servo system containing an auxiliary positioning control for providing extremely accurate movement of the element to be controlled consists of an input 12 furnishing pulses to a counter 10 of a magnitude and phase indicative of the movement desired in the controlled element.

Through a converter 13 counter 10 operates a motor 16 which, by means of a pulley 30 and a stationary wire 31, moves carriages 26 and 35 to a position determined by the count in the counter. 10.. A sensing apparatus 53 generates pulses on a feedback loop 54 and 55 and pulse generator 56 returns the counter 10 to a zero indication to stop the movement of the carriages 26 and 35. A thermal element 41 holds the spring 40 in compression so as the thermal element expands, the spring 40 moves the carriage 35 away from carriage 26. The thermal element 41, when it contracts, compresses the spring 40 still further and moves the carriage 35 toward the carriage 26. When the binary counter 10 reaches zero and passes therethrough, the sign stage 11 effects the control 20 to reduce the current flow through thermal element 41. This allows a pulse through direction pulse generator 56 to move the binary counter through zero in the opposite direction, which, in turn, causes the sign stage 11 to change and allow the control 20 to increase the current flow through thermal element 41.

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