Electricity: circuit makers and breakers – Retarded – Clock train
Patent
1974-09-09
1976-12-28
Scott, James R.
Electricity: circuit makers and breakers
Retarded
Clock train
200 36, 58 19A, 58 23D, H01H 4310
Patent
active
040003841
ABSTRACT:
A rotary switch for a timepiece in which a rotatable setting plate made of non-conductive material has fixed thereon a plurality of upstanding projections of equal axial height on a major surface thereof resiliently supporting coaxially thereon on the tips of the projections an electrically conductive contact gear driven rotationally by an hour gear of a timepiece. The setting plate carries an electrically conductive contact plate thereon that has upstanding angularly spaced contacts of lesser axial height than the upstanding projections. These contacts are angularly spaced from each other differently than the angular spacing of the upstanding projections and are disposed among and alternately with the upstanding projections. The contact gear is biased toward the projections by a resilient spring so that it travels substantially in parallelism with the setting plate and when a first set of through openings are in registry with the corresponding upstanding projections the projections will penetrate these openings and the contact gear will be moved axially so that it then seats on the upstanding contacts and rides thereon making electrical connection therewith. The contact gear has a second set of through openings that come into registry with the upstanding contacts and these will then penetrate these second openings and the electrical connection will then be broken. The upstanding projections have ramp surfaces engaged by a corresponding opening of the first set of openings so that the travelling contact gear travels up the ramps and is again seated on the tips of the upstanding projections for repeating the making and breaking of the electrical connection. Means are provided for setting the setting plate in any desired angular position relative to the contact gear. The upstanding projections are resiliently joined to the setting plate and each have a rear extension that rides resiliently on a fixed base plate.
REFERENCES:
patent: 3028456 (1962-04-01), Smith
patent: 3596013 (1971-07-01), Pihl
patent: 3643421 (1972-02-01), Herr et al.
Adams Bruce L.
Burns Robert E.
Kabushiki Kaisha Seikosha
Lobato Emmanuel J.
Scott James R.
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