Clock movement

Details Clock movement Clock movement

1995-09-12

1996-10-15

Miska, Vit W.

Horology: time measuring systems or devices

Display trains

368 47, 368187, G04B 1902, G04C 1102, G04C 900

Patent

active

055661408

ABSTRACT:
A clock movement includes a circuit board, first and second motors, a minute wheel connected to the first motor by a first gear train and an hour wheel connected to the second motor by a second gear train. The first and second gear trains preferably extend in a first direction, and the first and second motors are respectively disposed on opposite sides of the first and second gear trains and extend in a second direction transverse to the first direction. A first detection device detects when the minute hand is in a predetermined reference position and a second detection device detects when the hour wheel is in a predetermined reference position. The first detection device includes a minute detection sensor mounted on the circuit board and having a first light-emitting device and a first light-receiving device. The second detection device includes an hour detection sensor mounted on the circuit board and having a second light-emitting device and a second light-receiving device. The clock movement has a simple construction and is easy to manufacture, is suited to mass-production and can be manufactured at low cost.

REFERENCES:
patent: 4645357 (1987-02-01), Allgaier et al.
patent: 5231612 (1993-07-01), Allgaier et al.

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