Attitude director indicator

Description

FIG. 1 is a front elevational view of an attitude director indicator showing our new design;

FIG. 2 is a typical side elevational view thereof, the broken-line showing of the instrument housing being environmental and forming no part of the claimed design.

The drawing is lined to indicate contrasting colors. The rear of the indicator not shown, is substantially plain and unornamented.

Referenced Cited
U.S. Patent Documents
D170183 August 1953 Collins
D179443 December 1956 Dayton
D180812 August 1957 Schwieghofer
D190763 June 1961 Varner
D190968 July 1961 Andres
D205791 September 1966 Harding
D256678 September 2, 1980 Schmidt
2821695 January 1958 Strock
3525159 August 1970 Mills
3967236 June 29, 1976 Dietrich
4326189 April 20, 1982 Crane
Foreign Patent Documents
1094398 December 1954 FRX
1335741 July 1963 FRX
580671 August 1954 ITX
Patent History
Patent number: D274226
Type: Grant
Filed: Jan 27, 1982
Date of Patent: Jun 12, 1984
Assignee: Rockwell International Corporation (El Segundo, CA)
Inventors: Donald F. Schmidt (Cedar Rapids, IA), Siegfried Knemeyer, deceased (late of Yellow Springs, OH)
Primary Examiner: Nelson C. Holtje
Attorneys: Terry M. Blackwood, George A. Montanye, H. Fredrick Hamann
Application Number: 6/343,071
Classifications