Illuminable push button switching unit

Details Illuminable push button switching unit Illuminable push button switching unit

1996-03-22

1997-08-12

Dority, Carroll B.

Illumination

Illuminated scale or dial

Telephone dial

362 84, 362 88, 200314, H04M 122

Patent

active

056558260

ABSTRACT:
An improved push button switching unit is proposed of which the indicia on the key top is recognizable even in a dark place. Namely, a phosphorescent layer emitting phosphorescence even in a dark place is formed on the upper surface of the key top to provide recognizability of the indicia and further the switching unit is provided with a light sensor means and a light source which is lighted when the ambient lightness is low as detected by the sensor means. When the switching unit is used continuously in a dark place, the light source repeats cycles of a lighting period, in which the phosphorescent layer accumulates the energy of light, and a dark period, in which the phosphorescent layer emits phosphorescence by means of the accumulated energy, so that the power consumption for lighting the light source can be saved.

REFERENCES:
patent: 4710597 (1987-12-01), Loheac
patent: 5073843 (1991-12-01), Magee

Affiliated with

Also associated with

Rating

Illuminable push button switching unit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Illuminable push button switching unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Illuminable push button switching unit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-155801