Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1978-07-26
1980-02-12
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
B24B 2118
Patent
active
041876458
ABSTRACT:
An improved tracking system for belt-type abrading machines, particularly wide belt machines which employ a drive roll together with a belt tensioning and tracking roll. As is conventional, the tensioning and tracking roll is mounted upon a rocker arm providing for pivotal motion of the roll about its axis, and with the pivot axis of the rocker arm being located generally midway between the lateral ends of the roll. The system employs a primary and a secondary tracking driver, with the primary tracking driver being a conventional system responsive to the belt position sensor, and with the secondary tracking driver being responsive, on a time delay basis, to the drive motion activity of the primary tracking driver. The primary tracking driver is ordinarily a fluid actuated piston member which responds to signals from the belt position sensor, with the secondary tracking driver being a gear motor which drives a worm gear for adjustably repositioning the rocker arm supporting the tensioning and tracking roll. The arrangement accommodates both belt wear and belt stretch, and extends the lifetime of endless abrasive belts.
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Adolphson K. Bradford
Haugen Orrin M.
Nikolai Thomas J.
Timesavers, Inc.
Whitehead Harold D.
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