Registers – Coded record sensors – Particular sensor structure
Patent
1975-04-09
1976-03-02
Miller, Jr., George H.
Registers
Coded record sensors
Particular sensor structure
58125C, 58126E, 235133R, G04B 2708, G04B 1902
Patent
active
039409210
ABSTRACT:
In a rotating drum type of digital clock, the minute drum is fixed to the drum shaft. A drive disc is carried on the shaft, freely rotatable thereon, adjacent to the minute drum. Sandwiched between them is a detent ring which is keyed to the drive disc, but which has limited axial freedom with respect to both the disc and the drum, being pressed toward the web of the drum by a spring. Convex detent bosses extending axially from the ring can engage with any of a plurality of recesses in the web of the minute drum. The drive disc is advanced each minute by the normal actuating mechanism, and drives the minute drum through the detent ring. A setting knob is engageable with the shaft, permitting rotation of the latter, and hence of the minute drum, for setting purposes. In setting, the bosses are forced out of the recesses, the ring retracting axially, so that the drum can be rotated with respect to the ring. As a setting is completed, the bosses will drop again into recesses, thus indexing the drum to provide proper full-figure display of the numerals on its periphery.
REFERENCES:
patent: 2959914 (1960-11-01), Harada
patent: 3690063 (1972-09-01), Strachan
patent: 3721086 (1973-03-01), Flumm
Arbuckle F. M.
Bair D. R.
Bunker Ramo Corporation
Miller Jr. George H.
Weldon U.
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