Rotary data base with air bearing
AssigneeThe Singer Company
InventorHoward I. Jarmy
Life of this patent
Estimating the term…
Abstract
A document containing analog data is vacuum retained on a transparent rotating drum. A data illumination head and a light responsive reading head are mounted on a carriage which moves parallel to the axis of rotation. The heads transversely scan the existing analog data as the drum rotates generating a digital new data base. The carriage is supported on air bearings that constrain movement in pitch, yaw and roll, and is driven by a precision lead screw. The sample rate of the read head is controlled by a step accumulator in response to a shaft encoder which monitors the drum rotation.
Claims21
A system for reading an original data base and new data base, comprising:
- an annular member adapted to retain the original data base;
- means for rotatably supporting the annular member;
- rotary drive for turning the annular member on the bearing means about an axis of rotation;
- scanning member for illuminating and reading the original data base;
- traverse drive for establishing relative traverse motion between the members parallel to the axis of rotation by moving at least one of the members;
- guide means for retaining the members in parallel relationship during the traverse motion;
- drive controller for coordinating the rotary drive and traverse drive to scan the desired area of the original data base and establish the desired format of the new data base;
- and
- air bearing means for spacing the traversely movable member from the guide means during the traverse motion for reducing the friction and vibration coupling therebetween.
Dependencies are inferred from the claim text.