ERNEST L WEIL
Optometry in Winchester, MA
License number
Massachusetts 568
Type
Dispensing Optician
Address
Address
Winchester, MA 01890
Professional information
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Automatic Punch
Automatic Punch
US Patent:
4210048, Jul 1, 1980
Filed:
Sep 25, 1978
Appl. No.:
5/945232
Inventors:
Edmond U. Cohler - Lexington MA
Ernest L. Weil - Winchester MA
Ernest L. Weil - Winchester MA
International Classification:
B26D 716
US Classification:
83572
Abstract:
An automatic punch for paper or the like includes a plurality of punch heads that are driven as cam followers into a punching position by a cam shaft mounted for rotation about an axis transverse to the movement of the heads. Energy for the punching action is stored in a rapidly rotating flywheel. The energy is quickly transmitted to the cam shaft through a fast-acting single-turn wrap spring clutch mounted co-axially with the cam shaft and the flywheel. The clutch is simply activated by a mechanical escapement which provides positive engagement and release of the clutch in a single turn of the cam shaft. A small, inexpensive electric motor brings the flywheel to speed through a simple pulley and belt drive. The motor also provides the torque to bring the flywheel back to speed after each punch.