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US 4,831,504 AGranted
Holder with semiconductor lighting device
AssigneeJunichi Nishizawa
InventorsJunichi Nishizawa, Yoshikatsu Tamaoki
Life of this patent
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Abstract
An illuminated tool or key, in which a light source is detachably secured to a surface of the tool or key. Additionally, the emitted light can be modulated to perform an additional keying function when received by the lock. A three-color light emitter is preferable.
Claims4
An illuminated key, comprising:
- a key having a working portion at a first end thereof;
- lighting means for projecting light in a first direction, said lighting means comprising a light emitting diode;
- at least one switch of a momentary contact type;
- signal generating means for impressing a predetermined coded pulse modulated signal on light emitted from said light emitting diode in response to actuation of said switch;
- attaching means for detachably attaching said lighting means to said key on a surface thereof extending from said first end to a second end opposite said first end, wherein attachment of said lighting means to said key directs said first direction of said lighting means towards said first end;
- a power source;
- and
- means for housing said lighting means and said power source.
5 more elements
Dependencies are inferred from the claim text.