The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 15, 1996
Filed:
Sep. 12, 1995
Shigeru Kohata, Tokyo, JP;
Hiroyuki Hashizume, Tokyo, JP;
Seiko Clock Inc., , JP;
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.