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Sumner Simpson received US Patent No. 1,578,929 on March 30, 1926, filed June 4, 1921.
The patent's description opens (from the scanned text):
The invention relates generally to prpcesses of producing clutch facings, with-more particular reference to'the various typesi-of Itis well knowntliat there are two highly important qualities which, on account; of the natu-reof the work they are called upon to perform, should he possessed by clutch facingsin general, first, 2 they should have a uniformly high" coeflicient of friction, and second, they should be exceedingly tough inorder to withstand the excessive wearing strains of use. ticularly in the case of automobile clutches, the replacing of'the clutch rings is a laborious and expensive ...
- Author
- Sumner Simpson
- Published by
- US Patent Office
- Series
- US Patent No. 1,578,929
- Date
- March 30, 1926
- Library no.
- ACL Doc 22047 · asbestosclaims.law/library/22047
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 3 pages · 339 KB
Where it was listed
- Asbestos, May 1926, in its patents department (the year's issues)
Cite this document
Sumner Simpson. “Clutch Facing, and Process of Making Same (US Patent 1,578,929, 1926).” March 30, 1926. US Patent No. 1,578,929. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22047. https://asbestosclaims.law/library/22047.
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