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Electrostrictive Positioning Device

IP.com Disclosure Number: IPCOM000098681D
Original Publication Date: 1959-Oct-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 86K

Publishing Venue

IBM

Related People

Critchlow, AJ: AUTHOR

Abstract

This is a device for selectively positioning a movable element. One adaptation is to a printer consisting of a movable rack 2 carrying characters 3 which are selectively positioned at a printing station 5 by means of periodically movable members 6. The members 6 are selectively engaged with teeth of the rack 2 by means of electrostrictive elements 8 carried by the members 6. An element 8 is actuated by applying a voltage across that element by means of a switch 10 and a power source 12. The members 6 are driven through rods 14 which are periodically actuated by cam surfaces 16 carried on a rotatable shaft 18.

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Electrostrictive Positioning Device

This is a device for selectively positioning a movable element. One adaptation is to a printer consisting of a movable rack 2 carrying characters 3 which are selectively positioned at a printing station 5 by means of periodically movable members 6. The members 6 are selectively engaged with teeth of the rack 2 by means of electrostrictive elements 8 carried by the members 6. An element 8 is actuated by applying a voltage across that element by means of a switch 10 and a power source 12. The members 6 are driven through rods 14 which are periodically actuated by cam surfaces 16 carried on a rotatable shaft
18.

When a voltage is impressed across an electrostrictive element 8, that element is deformed to engage a tooth of the rack 2 and to mechanically couple the rack to the member 6 by which the rack is carried along with the member 6 when it is next actuated by a cam surface 16 through the rods.

As illustrated, the device utilizes four members 6 which operate sequentially when driven by four pairs of cams 16 and, in various combinations, additively impart the necessary increments of movement to the rack 2. A member 6 and cam 16 could be provided for each desired increment of movement.

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