Chart drive

Description

FIG. 1 is a bottom, front, and right side perspective view of a chart drive showing my new design, the dotted or broken line showing of a typical chart is for illustrative purpose only and forms no part of the claimed design;

FIG. 2 is a front elevational view;

FIG. 3 is a left side elevational view;

FIG. 4 is a right side elevational view;

FIG. 5 is a top plan view;

FIG. 6 is a bottom plan view; and

FIG. 7 is a rear elevational view thereof.

Referenced Cited
U.S. Patent Documents
2670794 February 1954 Gallagher
2932701 April 1960 Horstmann
3064261 November 1962 Maeder
3205502 September 1965 Chatelain et al.
3422695 June 1966 Wilson et al.
4760219 July 26, 1988 Daniell et al.
4866224 September 12, 1989 Malone
Other references
  • Brochure--"Model 98 Multi-speed Battery operated Chart Drive". Brochure--"Model 99 Battery operated Chart Drive". General Catalog--Mercury Instruments, Inc. General Catalog--870-R. Catalog 99-2 (4 pgs.) "Model 99 Battery operated Chart Drive". Sonceboz--(2 pg. brochure) "Type 720 Test"--Quartz Controlled Battery operated Chart Drive with Programmer. Reynold Equipment Company--Quartz Chart Drive.
Patent History
Patent number: D316976
Type: Grant
Filed: Oct 5, 1988
Date of Patent: May 21, 1991
Assignee: Mercury Instruments, Inc. (Cincinnati, OH)
Inventors: Thomas R. Comerford (Cincinnati, OH), Hubert F. Yeary (Newtown, OH)
Primary Examiner: Nelson C. Holtje
Assistant Examiner: Antoine D. Davis
Law Firm: Wood, Herron & Evans
Application Number: 7/253,750