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Publication numberUS1823762 A
Publication typeGrant
Publication dateSep 15, 1931
Filing dateMay 31, 1930
Priority dateNov 27, 1929
Publication numberUS 1823762 A, US 1823762A, US-A-1823762, US1823762 A, US1823762A
InventorsRathmann Paul
Original AssigneeFirm Elektrotechnische Fabrik
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric reflector lamp
US 1823762 A
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Description  (OCR text may contain errors)

P. RATHMANN ELECTRIC REFLECTOR LAMP sept.. 15, 1931.

Filed May 31. 1930 Ww@ TMW WM/(QW 'sleeve 11.

Pacented Sept. 15, 1931 PATENT Tol-Fics :PAUL RATEMANN,

OF BODENBACH, CZECHOSLOVAKIA, ASSIGtNOR` TO FIRM ELEK- TROTECHNISCHE FABRIK SCHMIDT @a C0., GESELLSCHAFT H. B. H., 0F IBODIENBACIBII CZECHOSLOVAKIA ELECTRIC REFLECTOR LAMP Application led Hay 31, 1930,

The present invention relates to electric incandescent lamps fitted with reflectors in which the lamp bulb is adjustable along the axis of the reflector, and its object is to facilitate adjustment of the lamp bulb without lateral displacement relatively toz the reflector, and also to facilitate exchange of the lamp bulb and examination of the lamp contacts.

These objects are attained b mounting the lamp socket to slide in t e refiector sleeve, and making a known pin and inclined slot connection between the reflector sleeve and the lamp socket, so that by turning a hand lever attached to the socket, the latter is moved axially in relation to the reflector.

To secure a constant and reliable electrical contact with the battery holder two contact springs are provided which extend to both a battery pole and the centre pole of the lamp. On moving the battery holder the said contact springs slide upon two contact strips which areiixed to the inner surtace of the casing andare connected to the switch device. The battery holder which is preferably of box form and is guided in the casing, provides a convenient place for sockets for spare lamps.

The accompanying drawings show a construction according to the invention, where Fig. 1 is a view of the interior of a lamp casing with the battery holder removed and its guide omitted,

Fig. 2 is an axial section of a lamp,

Fig. 3 is a view of its battery holder seen from that side where the incandescent lamp and the spare lamps are arranged.

vWith reference to the drawings the reflector 10 has a sleeve 11 as usual, in which is an inclined slot 12. In the reflector sleeve fits the socket body 16 which is attached to the box form battery holder 18. Mounted on the socket 16 is a pin (not shown) engaging in the guide slot 12 in the reflector The battery holder 18 has an arm 14 secured to it projecting laterally out of the lamp casing 15. The lamp 17 is screwed into the socket body 16 in the usual manner. The box form battery holder 18 Serial No. 458,613, and in Czechoslovakia November 27, 1929.

is open on the side remote from the lamp 17, so. that the battery 19 may be put from this slde therein. i

The slot 12 passes on its one end intok an axial groove 12 through which a pin on the lamp socket 16 may be introduced. spring 20 secured to the lid 21 of the caslng tends to move the battery 19 and box 18 and the socket body 16 towards the reflector.

Mounted on the battery box 18 are two sockets 22, 23 for spare lamps.

The spindle of the switch lever 24 carries a swltch contact spring 25 by which the lamp may be connected as desired either tobattery contacts or to an external supply from a d namo connected with the terminal 26.

ecured to the outer surface of the boxform battery holder 18 are two contact sprlngs 31, 32 which always bear against two contact stri s 33, 34 insulated from each other, and xed to the inner surface of the casing. The contact strips 33, 34 are rigidly connected with the switch device, while the contact spring 31 extends to the lamp contact 29, and contact spring 32 is connected to a battery terminal.

The electrical connection between both the terminal 26 vand the conductor leading from the dynamo and the incandescent lamp is effected partly by the lamp easing to which a lamp pole is electrically connected through the intermediary of the battery box, and partly by a contact spring 30, which is insulated from the casing and extends to the switch.

After opening the lid 21 a battery 19 may be put into the battery box with its short terminal strip either to left or right as desired, and the lamp is then ready. The lamp may be focussed by turning the arm 14 the outer end of which is made of insulated material or insulated from the casing and so moving and also turning the battery holder 18 and the battery'in the casing 15.

In case the lamp be fed from a dynamo only, the battery holder and the battery may be dispensed secured directly to the lamp socket 16.

with and the hand lever may be i Alternatively the lamp socket 16 may be a headed bolt and a nut slidably mounted in rotatably connected with the battery holder the slot in the casing through which the 18, so that on actuating the hand lever 14, hand lever passes. l secured in this case likewise tothe lamp In testimony whereof I ax my signature.

5 casing, the battery holder and the battery PAUL RATHMANN. 7 are not turned, but only move axially, While the lamp socket is turned and simultaneously moved axially. If the box is to remain at the same time stationary, the lamp socket is m made freely movable axially relatively to it, a constant electrical connection between the lamp pole 29 and the contact strip 31 being necessary to maintain.

In order that the incandescent lamp may 35 readily be brought into or out of the focus Y 8 ofthe reflector as desired, a bolt 35 having a head 36 and a nut 37 is movably set in the slot in the casing through which the hand lever 14 passes. On loosening the nut 37 v the bolt 35 may be moved into any desired 5,-,

position and secured there by tightening the nut. In this Way the position of the hand lever 14 which brings the filament of the lamp into exact focus of the reflector may be established once for all so that there is no u need to find it by trial and error on each occasion of use.

Having now particularly described and a ascertained the nature of my said invention andin what manner the same is to be per- 5 formed, I declare that What I claim is l. An electric reflector lamp comprising a reflector having a sleeve, a casing for the, said reflector, a slot in said casing, an incanc descible lamp adjustable along the axis of 100 the said reflector, and means for adjusting the lamp along the axis of the said reflector,

the said means comprising a lamp socket slidably mounted in the said reflector sleeve,

a pin and inclined slot connection between 1.3.5 the reflector sleeve and the lamp socket, a

hand lever secured to the lamp socket and adapted upon actuation to move the lamp socket axially in relation to the reflector sleeve, the said hand lever projecting exte- 11.0 riorly of the casing, and an adjustable abut ment for the said hand lever slidably mounted in the slot in the casing through which the hand lever passes.A A,

2. An electric reiector lamp comprising a reflector having a sleeve, a casing for the said reflector, a slot in said casing, an incandescible lamp adjustable along the axis of the 55 reflector, and means for adjusting the lamp 120 along. the axis of the. reflector, the said means comprising a lamp socket slidably mounted in the said reflector sleeve, a'pin and inclined slot between the reector sleeve and the lamp e* socket, a hand lever secured to the lamp 125 socket and adapted upon actuation to move l the lamp socket axially in relation to the reflector sleeve, the said lever projecting exteriorly from the easing, and an adjustable abutment for the said lever, and comprising

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2570507 *Oct 19, 1949Oct 9, 1951Gianni AndreoliEpiscopic projector
US4286311 *Dec 11, 1978Aug 25, 1981Anthony MaglicaFlashlight
US4527223 *May 18, 1984Jul 2, 1985Mag Instrument, Inc.Flashlight
US5590951 *Dec 21, 1994Jan 7, 1997Laser Products Ltd.Switch-less flashlights
US5629105 *Nov 24, 1992May 13, 1997Laser Products CorporationFlashlights and other battery-powered apparatus for holding and energizing transducers
US5642932 *Dec 22, 1994Jul 1, 1997Laser Products CorporationCombat-oriented flashlight
US6905223Aug 10, 2001Jun 14, 2005Mag Instrument, Inc.Flashlight
US7001041Dec 10, 2001Feb 21, 2006Mag Instrument, Inc.Flashlight
US7410272Dec 1, 2006Aug 12, 2008Mag Instrument, Inc.Lighting device
US8147090Sep 15, 2008Apr 3, 2012Mag Instrument, Inc.Flashlight
US8197083Aug 11, 2008Jun 12, 2012Mag Instrument, Inc.Lighting device
US8696174Feb 12, 2009Apr 15, 2014Matvey B. ShpizelFlashlight with improved optical density
US8770784Apr 24, 2012Jul 8, 2014Mag Instrument, Inc.Lighting device
USRE40027 *Nov 24, 1992Jan 22, 2008Surefire, LlcFlashlights and other battery-powered apparatus for holding and energizing transducers
USRE40171Feb 27, 2003Mar 25, 2008Mag Instrument, Inc.Tubular barrel-shaped flashlight having rotatable switching assembly and focusing and defocusing capability
Classifications
U.S. Classification362/188
International ClassificationF21V13/00, F21L4/00, F21Y101/00
Cooperative ClassificationF21V19/02, F21V19/047, F21V14/025
European ClassificationF21V19/04S, F21V19/02, F21V14/02L