Patent
Photovoltaic clock and time piece for such a clock
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TLDR
A solar timepiece comprises a drive unit including a commercially available battery clock mechanism mounted to the back of a support plate for the solar cells as mentioned in this paper, which is angularly adjustable about the axis of the hands arbors so that the longitudinal extent of solar cells can be made to coincide with the decoratively adapted orientation of light passage areas in the dial face.Abstract:
A solar timepiece comprises a drive unit including a commercially available battery clock mechanism mounted to the back of a support plate for the solar cells. The clock mechanism includes hands arbors which pass through an opening in the support plate. The support plate is angularly adjustable about the axis of the hands arbors so that the longitudinal extent of the solar cells can be made to coincide with the decoratively adapted orientation of light passage areas in the dial face located directly in front of it.read more
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Patent
Electronic time-piece
TL;DR: In this article, the accumulator and photovoltaic cells are mounted on an annular part surrounding the movement of an electronic movement and the dial plate is equipped with cutouts.
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Patent
Watchdial structure incorporating electrical devices
TL;DR: The space required for electrical connections in small wrist watches incorporating electrical devices such as photo-electric elements or display elements is substantially reduced by the use of stressed metal members making firm contact with each other rather than conventional wiring and solder as discussed by the authors.