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:
Dec. 30, 1997
Filed:
Mar. 11, 1996
Akihiko Isaka, Nagano, JP;
Sankyo Seiki Mfg. Co., Ltd., Nagano, JP;
Abstract
A music box comprises a drive shaft for winding a spring, a drum which rotates with transmitted rotation of the drive shaft when a spring is released, a vibrating plate with reeds for playing music when struck by pins on the drum, speed governing device having a speed increasing gear train which transmits the rotation of the drive shaft and a worm shaft which is positioned in the final step of the speed increasing gear train and on which a rotor is fixed, a frame for rotatably supporting the drive shaft and one end of the worm shaft and on which the drum, the vibrating plate and the speed governing device are arranged and a housing unit which rotatably supports the drive shaft and has a spring enclosure for enclosing a spring and a support unit which is formed at an end of the spring enclosure and supports the other end of the worm shaft. The support unit comprises a bearing unit which rotatably supports the other end of the worm shaft at a center thereof, an outer frame formed to enclose the bearing unit and a slit being formed between the bearing unit and the outer frame.