Keyboard musical instrument for exactly producing tones and...

Details Keyboard musical instrument for exactly producing tones and... Keyboard musical instrument for exactly producing tones and...

2005-09-06

2005-09-06

Fletcher, Marlon T. (Department: 2837)

Music

Instruments

Automatic

C084S020000, C084S626000, C084S658000, C084S724000, C084S744000

Reexamination Certificate

active

06940005

ABSTRACT:
A hammer sensor includes a photo-filter plate movable together with a hammer assembly and having a base plate fixed to the hammer shank and an arc pattern formed on the base plate and different in transparency from the base plate, a photo radiating element radiating a light beam toward the arc pattern and a photo detecting element disposed on the optical path of the light beam for converting the amount of transmitted light to an electric signal, wherein the photo-filter plate converts the rotational angle of the hammer assembly to the amount of light incident on the photo detecting element, and makes the photo radiating element and the photo detecting element stationary so that a suitable photo-shield case prevents the photo elements from environmental light.

REFERENCES:
patent: 5237123 (1993-08-01), Miller
patent: 5612502 (1997-03-01), Ura
patent: 5824930 (1998-10-01), Ura et al.
patent: 5880393 (1999-03-01), Kaneko et al.
patent: 5909028 (1999-06-01), Yamamoto
patent: 6297437 (2001-10-01), Ura et al.
patent: 6359207 (2002-03-01), Oba et al.
patent: 6380472 (2002-04-01), Sugiyama et al.
patent: 6384305 (2002-05-01), Lee
patent: 6403872 (2002-06-01), Muramatsu et al.
patent: 6515213 (2003-02-01), Muramatsu et al.
patent: 6713751 (2004-03-01), Muramatsu et al.
patent: 2002/0194986 (2002-12-01), Kato et al.
patent: 1159636 (1997-09-01), None
patent: 06-138870 (1994-05-01), None
patent: 06-149233 (1994-05-01), None
patent: 8-101687 (1996-04-01), None

Affiliated with

Also associated with

Rating

Keyboard musical instrument for exactly producing tones and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Keyboard musical instrument for exactly producing tones and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Keyboard musical instrument for exactly producing tones and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3413961