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Document Number
US Patent 5243194
Issued Date
September 7, 1993
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Abstract
Disclosed is an improved indicator, which includes a scale plate having a pointer rotatably mounted thereon; an ultraviolet light source for illuminating said scale plate; and indicia arranged on the scale plate for indicating a specific value in cooperation with the pointer, each of the indicia including first and second parts, and in which the second part includes fluorescent brightener ink or paint therein so as to be illuminated when the ultraviolet light source is turned on. When the ultraviolet light source is turned on, particularly at night, the second parts of the indicia will become visible so that the visibility of the indicia is changed from the daylight condition in which the light source is turned off. Namely, an interesting design change of the indicia of the indicator can be obtained.
Drawing
Indicator - US Patent 5243194 Drawing
Drawing from US Patent 5243194
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Number of Claims:
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Owner
[*] Notice:The portion of the term of this patent subsequent to July 14, 2009 has been disclaimed.
Published
September 7, 1993
Application Number
07/774,616
Filed
October 10, 1991
US Classification
250/461.1   116/286 250/463.1
Int'l Classification
G01D   13/28   (20060101)   G01D   13/00   (20060101)  
Attorney/Law Firm
Parent Case
This application is a continuation of application Ser. No. 07/541,205, filed Jun. 22, 1990, now U.S. Pat. No. 5,130,548, which is a continuation of application Ser. No. 07/304,598, filed Feb. 1, 1989, now abandoned.
Priority Data
Feb 03, 1988 [JP] 63-12512[U] Feb 18, 1988 [JP] 63-19231[U]
USPTO Field of Search
368/226   250/461.1   250/463.1   116/286   116/287   116/288   116/DIG.36   362/29   362/30   40/543   40/542  
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Description
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