Shutter, optical sensor system using the same and shutter...

Details Shutter, optical sensor system using the same and shutter... Shutter, optical sensor system using the same and shutter...

2005-03-22

2005-03-22

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S227220, C250S229000, C084S724000, C084S744000

Reexamination Certificate

active

06870151

ABSTRACT:
A shutter holder has a frame-like base portion and a tie plate inwardly projecting from a side portion of the base portion in a cantilever fashion, and the tie plate has a rectangular cross section smaller in thickness and/or width, i.e., second moment of inertia than the cross section of the base plate at the boundary; even if a staple is deeply driven into a moving object such as a wooden key, the tie plate is widely deflected so as to absorb the deformation of the wooden key, and permits a shutter plate to keep itself perpendicular to the lower surface of the wooden key.

REFERENCES:
patent: 6407321 (2002-06-01), Tamaki et al.
patent: 6713751 (2004-03-01), Muramatsu et al.
patent: 6815603 (2004-11-01), Kato et al.
patent: 20030025071 (2003-02-01), Kato et al.
patent: 3-154097 (1991-07-01), None

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