Combined photoelectric and contact digital tachometer

Description

FIG. 1 is a front, right side and bottom perspective view of a combined photoelectric and contact digital tachometer showing my new design;

FIG. 2 is a right side elevational view;

FIG. 3 is a left side elevational view;

FIG. 4 is a bottom plan view;

FIG. 5 is a top plan view;

FIG. 6 is a front elevational view; and

FIG. 7 is a rear elevational view thereof.

Referenced Cited
U.S. Patent Documents
D304306 October 31, 1989 Kagayama
4000465 December 28, 1976 Sugiyama
Other references
  • Cole-Parmer Instrument Co., Digital Tachometer, .COPYRGT.1984, front cover. Shimpo, Shimpo Tachometers & Counters, .COPYRGT.1985, front cover.
Patent History
Patent number: D317417
Type: Grant
Filed: Aug 18, 1988
Date of Patent: Jun 11, 1991
Inventor: Dong-Chang Lin (Taipei, Taiwan)
Primary Examiner: Nelson C. Holtje
Assistant Examiner: Antoine D. Davis
Attorneys: Morton J. Rosenberg, David I. Klein
Application Number: 7/233,609
Classifications