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Publication numberUS1397705 A
Publication typeGrant
Publication dateNov 22, 1921
Filing dateJan 17, 1918
Priority dateJan 17, 1918
Publication numberUS 1397705 A, US 1397705A, US-A-1397705, US1397705 A, US1397705A
InventorsFrancis M Rosenfeld, Louis E Shaw
Original AssigneeDiamond Electric Specialties C
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Portable electric lamp
US 1397705 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)


Patented Nov. 22, 1921..

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Specification of Letters Patent.

Application filed January 17, 1918. Serial No. 212,325.

To all whom it may concern:

Be it known that we, LoUIs E. SHAW, a citizen of the United States, and a resident of East Oran e, Essex county, New Jersey, and FRANCIS ROSENFELD, a citizen of the United States, and a resident of the city, county, and State of New York, have invented an Improvement in Portable Electric amps, of which the following is a specificalOI'l.

Our invention relates to portable electric lamps of the type commonly known as flashlights and has for its object to produce a lamp particularly adapted to certain requirements and peculiar conditions of use, such as are met with in the use of such lamps in the Army, although it will be understood that many features of our invention are in connection with lamps for other than Army uses; In a lamp intended for use in field service, a number of special features are desirable; for instance, the lamp should be provided with contacts to produce intermittent or'relatively constant illumination at will, so that it may be used for signaling or continuous op eration. The lamp should be arranged so as to be readily attachable to the belt or to the clothing of the user, so as to leave the hands free, and when thus attached, should be arranged to project the light in front of the user. .VVhen attached to the clothing, the contact device'should be-in an easily accessible position, particularly if the lamp is to be used for signaling. In order to facilitate shipping and produce as littlebulk as possible, the lamp should be collapsible or fold' able, and to reduce the weight to be carried. by the user, it should be of a construction which will permit it"tobe made of materials having as little weight as practicable, device, such as a strap, capable of adjustment to various positions, should also be attached to the lamp.

The lamp of our invention attains the foregoing result and others, as will be apparent from the following specification.

In the drawings, which illustrate an operative form of our device, and which are not intended to illustrate the only form wh1ch it may take, we have shown:

In Figure 1,a front view of our-improved lamp,

In Fig. 2, a sectional view thereof on the line 2-2;


- thereof and another In Fig. 3, a top view of our improved portable lamp;

Patented Nov.22, 1921.

In Fig. 4, a sectional view takenon the line of Fig. 1; and

In Flg. 5, a sectional view taken on the 11116. 55 of Fig. 3.

In general, our improved portable electric lamp conslsts of a switch supporting member 1, which maybe of insulating material, or maybe of metal properly insulated and a container 2, adapted to contain a battery 3, said container being made of a flexible material, preferably a woven cloth and being attached to the switch supporting member by means of a cord 4 or other suitable means. 1ts lower end, as illustrated inFig. 2 and may be also closed by means 'of the stra 5 and buckle 6, or by any other suitab e fastening, thus holding the battery 3 in engagement with the loweredge of the switch suppplrtmg member 1. V

' en the battery-is removed from the container 2, the container may be folded about the switch supporting member 1 and an extremely compact construction for shipping thus produced. Strap 5 is preferab Container 2 is arranged to open at attached to the lower portion of the container 2, by means of a snap fastener 7 and to the switch supporting member 1 by means of a button 8. It thusforms a loop, WlllCh may' be brought around the wearers belt and is provided'w-ith a plurality of buttonholes 9, so that its position may be adJuSted upon the belt, or thestrap may be buttoned over one of the buttons upon the wearers The switch supporting member 1 consists of a shell 10, preferably of insulating ma- A terial, having formed in it shoulders 11, to

engage the upper edge' of the battery 3. Battery 3 .is of the ordinary typle, havlng one contact 12 extending from t e in a line parallel to the longitudinal axis contact 13' extending across the upper edge of the battery. Contact 12 ma be engaged by means of the connector s own at the upper right-hand corner of Fig. 5, consisting of a coiled spring 14, between the convolutions of which the contact 12 enters. A sufiiclent pressure is thus produced by the spr ng and the necessity for the exact positioning for the contact 12 is avoided, since it may enter battery between any two of the convolutions of the spring-1 4 that happen to be in a correct position. Spring 14 is supported by means of a plate having dependmg arms 15 and .16 and a horizontal portion 17 which may be held at the switch supporting member by means of screw 18. A prolongation of the horizontal portion 17 extendsunder the switch operating button 19, so that it may be depressed to bring the contact 20, formed on the horizontal portion 17 into contact with one pole 21 of the'lamp 22, through the reflector 23. The reflector 23 is preferably held in place by means of a screw-threaded collar 24,.

as shown in Figs. 2-and 5, with the battery contact 13, which extends across the top edge of the battery 3. Connector 28.1nay be secured to the switch supporting member 1 by means of the screw 29, or in any other suit- 1 able manner.

tained. It will be observed that the push In order to provide for intermittent or continuous illumination at will, the push button 19 is provided with a locking mechanism, which comprises a vertical slot 30 in the push button 19, said slot having enlargements 31 and 32 at the opposite ends thereof. Traversing the push button is a locking member, which may consist of sleeves 33 and 34 mounted upon the rod 35, which may be attached to the sleeves in any suitable man ner. A friction spring 36 is inserted in the recess 37 before the locking member is ut into place and serves to holdthe locking member against accidental displacement.

When the parts are in the position shown in Fig. 4, the push-button 19 may be moved downwardly against the spring provided by the horizontal portion of contact '17 and intermittent illuminationmay thus be obbutton 19, being at the top of the lamp, is in a convenient position to be operated by the thumb when the belt'or clothing of the user, and it is thus peculiarly well adapted for signaling.

If. when the parts are in the position shown in Fig. {the locking member be moved to the left, the sleeve 33 will enter the enlarged opening -32 and lock the button against movement, thus preventing accidental light ing of the lam If continuous illumination is desired, thehutton 19 is depressed and the lockinglmember is then moved to the left, to

The I the lamp is supported uponthe position shown in Fig. 4 until sleeve 33 enters the enlarged aperture 31. The button will then be locked in the depressed position and continuous illumination may thus be obtained. It is desirable to provide the recess 38, in order that the locking member may be substantially flush with the opposite faces of the switch supporting member-to prevent accidental movement thereof, or its catching upon the clothing of the wearer, etc.

While we have only shown one form of our I mounted upon the rigid member and adapted to engage one terminal of the battery and comprising a spiral spring, between the convolutions of which said battery terminal is adapted to be inserted.

'2. A portable electric lamp, comprising a hollow, rigid member, a lamp supported in .oneside thereof, a contact member located within the rigid member and adapted to connect the lamp to a source of current, a depressible contact operating'member, projecting through the top of the rigid member and locking means for said member com prising a longitudinal slot in said depressible member, with an enlarged recess at each end, a plurality of sleeves mounted on a slidable detent and adapted to engage said enlarged recesses to control said depressible member, the upper recessf'to retain said memher in depressed position and make contact, and the lower recess to retain said member in raised position and break contact, and Ia'friction spring engaging one of the sleeves of said locking member to hold it in place.

3. A portable electric lamp, comprising a rigid member, having a recess, a battery connecting strip bridging said recess and extending into. it, a lamp mounted at the side of the member and projecting through one of its side walls into contact with said connecting strip, a battery connector, comrising a spiral spring, between the convoutions of which one pole of the battery is comprising a I,

adapted to be engaged, located within the recess, a spring contact connected to said connector,and a depressible contact pro ecting through the top of the rigid memberand abutting against the spring contact and adapted to moveit into'contact with one pole of the lamp.

4. In a portable electric lamp,

a battery, having one pole in the form of a flat projecting strip and a connector in'the 'form of a, splral spring, adapted to engage said trip between its convolutions.

i the switch carrying member.

, 5. In a portable electric lamp, a battery, having its poles in the form of flat projecting strips, one of said strips being substantially in the direction of the longitudinal axis of the battery and the other being at an angle thereto, a switch carrying member, a connector, comprising a spiral spring, between the convolutions of which the strip in the direction of the longitudinal axis is adapted to be engaged, mounted upon said switch carrying member, and a second connector also mounted thereon, comprising a metallic member, mounted transversely of 6. A portable electric lamp comprising a casing, a lamp supported in one side thereof, a battery and a contact within the casing, a contact operating plunger extending through a wall of the casing said plunger having alongitudinal slot and transverse recesses communicating with said slot, and a slidable detent extending through said slot and en- 7. A portable electric lamp comprising a I casing having opposed peripheral recesses, alamp supported by the casing, a battery and a contact within the casing, a contact operating plunger extending through a wall of the casing, said plunger havinga longitudinal slot and transverse recesses communicating with said slot, and a slidable detent extending through said slot and having both its end projecting into the peripheral recesses and exposed for manual operation, and means on the detent to engage the transverse recesses in theplunger.

In testimony whereof, we have signed our names to this specification this 9th day of January, 1918.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2482287 *Oct 11, 1945Sep 20, 1949Justrite Manufacturing CoHeadlight lantern
US4774638 *Mar 10, 1987Sep 27, 1988Caires Richard TPortable hand-held consumer device
US4868724 *Feb 28, 1989Sep 19, 19893 W Industry Inc.Electric torch with flexible casing
US5463539 *Dec 10, 1993Oct 31, 1995Lumatec Industries, Inc.Miniature pocket flashlight with lens module and outer flexible sheath
U.S. Classification362/189, 362/200, 340/321, 362/191
International ClassificationF21L4/00
Cooperative ClassificationF21L15/06, F21L4/00
European ClassificationF21L15/06, F21L4/00