Rotatable raster scan display

Details Rotatable raster scan display Rotatable raster scan display

1979-06-29

1981-05-12

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

315364, 358254, 340720, 340727, G08B 536

Patent

active

042675553

ABSTRACT:
Apparatus for rotating a cathode ray tube (CRT) which is operated as a graphic display through 90 degrees such that different size pages of data may be displayed while minimizing the control circuitry required. The display deflection yoke is fixedly attached to a support frame for the display. The CRT is rotatably mounted within the yoke and held by annular thrust bearing which allows the CRT to be rotated 90 degrees. A switch is actuated by the rotation of the CRT to select between sets of control resistors to control the raster scan of the CRT in accordance with its orientation.

REFERENCES:
patent: 2404030 (1946-07-01), Browne
patent: 2428928 (1947-10-01), Cain
patent: 2468714 (1949-04-01), Leverene
patent: 3676850 (1972-07-01), Goldman et al.
patent: 4167757 (1979-09-01), Kono et al.
Klein; Cathode-Ray Tube Rotating Apparatus; IBM Tech. Discl. Bul.; vol. 18, No. 11, Apr. 1976, p. 3548.

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