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US 4,228,484 AGranted
LED flasher for battery cell-powered lamp
OwnerMalcolm D. Johnstoneinventor
Life of this patent
Estimating the term…
Abstract
An LED flasher circuit is attached to a battery-cell-powered lamp and connected to the battery power source to provide a finding aid for the battery lamp in the dark.
Claims7
In a lamp powered by self-contained electric cells and having an auxiliary light source to aid in finding the lamp in the dark, the combination in said auxiliary light source comprising:
- (a) a flasher circuit contained within said lamp;
- (b) means automatically connecting said flasher circuit directly to said self-contained electric cells upon installation of said cells;
- and
- (c) a light-emitting diode mounted in a visible location at the outer body of said lamp and connected directly to said flasher circuit, the flasher circuit being selected with components to provide a flashing rate to said light-emitting diode of at least 1 Hertz with an average current drain from said electric cells of less than 1.0 milliamperes.
1 more element
A flashlight comprising:
- (a) a body having a first end and a second end;
- (b) an endcap which attaches to the body at the first end;
- (c) a head which attaches to the body at the second end;
- (d) a module containing an LED flasher circuit attached to an inside of the endcap wherein a substantial portion of an LED is visible;
- (e) a first conductor running from a switch for a lamp to a portion of the body proximate the first end;
- (f) a second conductor attached to the module, connected to the LED flasher circuit, adapted to be connected to a cathode of a cell, and having a portion which automatically connects to the first conductor when the endcap is attached to the body;
- (g) a third conductor running substantially from the first end to the second end of the body;
- (h) a fourth conductor located in the endcap, connected to the LED flasher circuit, and having a portion which automatically connects to the third conductor when the endcap is attached to the body;
- and
- (i) connection means to automatically connect the fourth conductor with a conducting member which is connected to an anode terminal of the lamp.
7 more elements
Dependencies are inferred from the claim text.