Personal indicator with light emission multiplying microprism array
First Claim
1. A personal safety device comprising:
- L.E.D. means for providing light, a power source for providing electrical power and coupled with the L.E.D. means, switch means for connecting the power source with the L.E.D. means;
a case enclosing the L.E.D. means and power source, the case including a plastic overcap overlying the L.E.D. means; and
a plastic sheet having a transparent microprism array and positioned between said overcap and the L.E.D. means with the microprism array facing the overcap, wherein the microprism array provides multiplication of light emitted by the L.E.D. means by displaying at the overcap a plurality of spaced concentrations of the light emitted by the L.E.D. means.
1 Assignment
0 Petitions
Accused Products
Abstract
A safety device in the form of a compact, battery-operated, personal signalling system for providing light signals for personnel monitoring and detection purposes while operating under hazardous conditions. The device includes a light source that can emit either visible light or non-visible infrared light as periodic flashes. A light emission multiplier is provided between the light source and a protective, overlying panel to increase the visibility of the emitted light. The light emission multiplier is in the form of a thin sheet of vinyl plastic that includes a plurality of pyramidal microprisms on an outwardly facing surface. The microprisms operate to multiply the number of light emission points, thereby increasing the visibility of the safety device.
105 Citations
42 Claims
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1. A personal safety device comprising:
- L.E.D. means for providing light, a power source for providing electrical power and coupled with the L.E.D. means, switch means for connecting the power source with the L.E.D. means;
a case enclosing the L.E.D. means and power source, the case including a plastic overcap overlying the L.E.D. means; and
a plastic sheet having a transparent microprism array and positioned between said overcap and the L.E.D. means with the microprism array facing the overcap, wherein the microprism array provides multiplication of light emitted by the L.E.D. means by displaying at the overcap a plurality of spaced concentrations of the light emitted by the L.E.D. means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
- L.E.D. means for providing light, a power source for providing electrical power and coupled with the L.E.D. means, switch means for connecting the power source with the L.E.D. means;
Specification