Calibrator for two wire transmitters

- Rosemount Inc.
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Description

FIG. 1 is a top and left front perspective view of a calibrator for two wire transmitters showing our new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a front elevational view thereof.

Referenced Cited
U.S. Patent Documents
D249475 September 19, 1978 Turner
D256896 September 16, 1980 Kuramoto
2875403 February 1959 Gilbert
3622877 November 1971 MacDavid
3701016 October 1972 Bennett
Other references
  • North American Bulletin, 80.10-8/79-"Tech-Mate" Digital Calibrator. Radio-Electronics-6/60, p. 100-Transfer Standard Calibrator.
Patent History
Patent number: D268173
Type: Grant
Filed: Oct 6, 1980
Date of Patent: Mar 8, 1983
Assignee: Rosemount Inc. (Eden Prairie, MN)
Inventors: Robert A. Guetschow (Minnetonka, MN), Daniel J. Durdin (Richfield, MN)
Primary Examiner: Nelson C. Holtje
Law Firm: Kinney, Lange, Braddock, Westman and Fairbairn
Application Number: 6/194,608
Classifications
Current U.S. Class: Provided With Handle, Or Hand-held (D10/78)
International Classification: D1004;