Lighting device control using variable inductor

(19)

(11)

EP 2 894 946 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	28.10.2015 Bulletin 2015/44

(43)	Date of publication A2:
	15.07.2015 Bulletin 2015/29

(21)	Application number: 15150536.9

(22)	Date of filing: 08.01.2015

(51)

International Patent Classification (IPC):

H05B 33/08^(2006.01)
F21V 23/04^(2006.01)
H01H 13/64^(2006.01)

H02J 9/00^(2006.01)
G06F 3/046^(2006.01)
H05B 37/02^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

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Priority:

10.01.2014 US 201461926233 P
13.01.2014 US 201461926785 P
19.12.2014 US 201414578201

(71)	Applicant: SureFire, LLC
	Fountain Valley, CA 92708 (US)

(72)	Inventors:
	Hunt, William A. Fountain Valley, CA California 92708 (US) Nguyen, Loc Fountain Valley, CA California 92708 (US) Burayez, Ammar Fountain Valley, CA California 92708 (US) MAatthews, John W. Fountain Valley, CA California 92708 (US)

(74)	Representative: Freeman, Jacqueline Carol
	WP Thompson 55 Drury Lane London WC2B 5SQ London WC2B 5SQ (GB)

(54)	Lighting device control using variable inductor

(57) Various techniques are provided for implementing a variable control for a lighting device, such as a flashlight, that uses a variable inductor. The lighting device may include a tail cap, a battery terminal, and a variable inductor mounted in the tail cap and electrically connected in series with the battery terminal. The lighting device may also include a user operable switch configured to selectively bypass the variable inductor. The variable inductor may include, for example, a magnetic coil comprising a wire coil and a core. The variable inductor may also include a ring comprised of ferrous material and having a substantially elliptical inner circumfery and surrounding the magnetic coil, wherein the ring is adapted to be rotated relative to the magnetic coil in response to user actuation of a rotatable user control.

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