Mechanical hour and minute display device

Horology: time measuring systems or devices – Chronological – With mechanical or electromechanical driven display

Reexamination Certificate

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C368S221000, C368S233000

Reexamination Certificate

active

07075860

ABSTRACT:
This hour and minute display device comprises four disks, two for displaying, respectively, the tens and units of hours, two for displaying, respectively, the tens and units of minutes, each disk being fixedly connected to a toothed wheel linked to a jumper, said toothed wheels, fixedly connected to the two disks for displaying, respectively, the units of hours and of minutes, being linked to respective yoke mechanisms pressed by elastic members against respective instantaneous-jump cam elements, and further comprises, between said cam elements and the toothed wheels fixedly connected, respectively, to said tens of minutes and of hours disks, mechanisms for connecting these latter toothed wheels to said respective instantaneous-jump cam elements with each change of tens.

REFERENCES:
patent: 359227 (1887-03-01), Pallweber
patent: 2130873 (1938-09-01), Bourquin
patent: 2636339 (1953-04-01), Holzner
patent: 2645896 (1953-07-01), Uhlig et al.
patent: 2734338 (1956-02-01), Uhlig et al.
patent: 3673787 (1972-07-01), Kovacevic
patent: 3712048 (1973-01-01), Bachmann
patent: 3854280 (1974-12-01), Wuthrich
patent: 3930359 (1976-01-01), Flumm et al.
patent: 3982388 (1976-09-01), Guyot et al.
patent: 5581520 (1996-12-01), Ogden
patent: 546332 (1932-03-01), None
patent: 2257935 (1975-08-01), None

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