US1421399A

US1421399A - Office

Info

Publication number: US1421399A
Authority: US
Publication date: 1922-07-04
Anticipated expiration: 1939-07-04

Description

c. F. BuRGEsS. BATTERY HAND LAMP. APPLICATON FILED MAY 14| 1920.

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cHAnLns F. Buitenss, or MADISON, wisconsin, Assrenon r.ro Buaenss BATTERY COlVlil-Jf-LNY,V F MADISON, WISCONSIN, A CORPORATION 0F WISCONSIN.

BATTERY 'HAND LAMP.

Specification of Letters Patent.

Patented July 4, 1922.

Application filed May 14, 1920. Serial No. 381,245.

To all whom t may concern: A f i Be it known that I, CHARLES F. BURGnss,

i a citizenl of the United States, residing at Madison, in the county of Dane, State of Wisconsin, have invented certain new and useful Improvements in Battery f Hand Lamps; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use theV same.

Battery hand; lamps as ordinarily constructed throw a rather concentrated beam of light of relatively small diameter. For some purposes,vas for work at a desk, or around machinery, a more diffused light is desirable.

It is one ofthe objects of the present invention to provide a battery hand'lamp so constructedl thatit easily can be converted for use in delivering diffused light, `or the usual concentrated beam, as occasion re quires.` To this end the reflectorr for the lamp is of special construction and is removable with the lens and lens-supporting ring to leave an operative battery lamp-adapted like the ordinary candle for distributing light'in substantially all directions. l

It is a -further object of the present invention'to so mount the lamp and its associated parts that theyare readily accessible for adjustment or renewal.V

It is a further object of the present invention to provide a resilient mounting-jef the lamp, preferablyfin the form of a yielding support for the lamp socket, whereby shocks and blows from the battery against the inl ner and fragi'leterminal of the lamp are in dle to which a lens-supporting ring can be addd if a concentrated beam of light is desire 5 i Fig. 2 is a sectional elevation through a complete hand lamp ;V and Fig. 3 is a view of the front end of the hand lamp with the enlarged head and its lens and reflector removed.

ln the particular embodiment illustrated in the drawings, the dry cells 1 and 2, of which any suitable number may be provided, are arranged end to end in series relation within a paper tube 3. The naked bottom of the lowermost dry cell is electrically connected through a helical spring 4 with a metal bottom cap `5 screw-threaded to the lower end of the tube 6 which forms the casing of the hand lamp. This tube 6 may be of metal orv of fiber, in accordance with the usual practice. At the front end of tube 6 is a metal collar 7 preferably attached permanently to the tube, as by rivets 8.

This collar 7 may have lits `front edge turned f inward to form a retaining flange 9.

At the front end of the casing so formed, and ypreferably 3 attached Athereto permanently, as by screw-threading intocollar 7 before the latter is rivetedto tube 6, is an insulating disc 10. This is preferably made of soft rubber or equivalent yielding land insulating material. Through a central opening in this insulating disc protrudes a lamp 11 with its inner terminal 12 in contact with and therefore inelectrical connection with a terminal 13 of the battery of dry cells. The lamp is provided with a socket 14 in which it is suitably`v secured, as by screw threads. Mounted inthe insulation and contacting with socket 14 is a pin or screw 15, serving as a conductor with which a sliding finger 16 may make connection in usual manner when the lamp is to be lighted. A sliding push button 17 suitably mounted on the casing serves as a means for controlling movement of the contact finger 16. Other forms of switch mechanism can of course be used in completing the connection from the bottom terminal of the battery through spring 4; and cap 5 to lamp socket 1li.

The structure above described is a completely operative battery candle for giving diffused light in practically all directions,

and the lighting of the lamp by the battery current is under full control of the switch mechanism and its actuating button 1T.

In addition to the structure above described, there may be and preferably is provided a detachable head, one embodiment of which is illustrated in Fig. 2. The head there shown comprises a` threaded portion 18 engaging with threads on collar 7, a flaring portion 19, and a cylindrical portion 20, on a shoulder 21 of which is seated the flange of a reflector 22. A lens 23 is seated on the reflector flange and the front edge of the sheet metal head is spun over at 24 to permanently grip the lens and hold it and the reflector permanently in position.

The center of reflector 22 has an opening larger than the bulb of lamp 11, so that the head may be unscrewed and removed from the casing without disturbing` the operative relation between the battery and the lamp. Ihe lamp socket 14 may have its upper edge flared outwardly to serve as a small reflecting surface, but the socket has a diameter smaller than that of the opening in the reflector so that an air gap intervenes at all times to insulate the reflector' from the socket.

lith the arrangement above described, the usual concentrate-d beam of light is thrown by the hand lamp when the switch is closed at screw 15, and if a diffused light is desired, the flaring head 'is removed to convert the hand lamp into the battery candie shown in Fig. 1. This adjustment may be made even when the lamp is burning and without disturbing in any way the normal operative relation between the battery and the incandescent lamp. If but a slight alteration in the beam of light is desired, this may be effected by partially unscrewing the head, for by so doing, the reflector shifts with respect to the lamp, changing the focal distance, with resultant change in the character of the beam delivered by the hand lamp.

The facility with which the hand lamp can be taken apart and put together is of great convenience to the user, and particularly to a salesman demonstrating the device to a. prospective purchaser, for the reflector and the lens, are always held in proper operative relation to the enlarged head and do not get scattered around. rllso, in putting the parts together' there is no danger of getting the reflector in crooked and then crushing it out of shape or spoiling the lamp or its socket as the parts are screwed together, this being a difficulty commonly experienced with battery hand lamps now on the market. The bright surface of reflector 22 need not be touched by the lingers, and so keeps bright even though it itnay have a delicate and highly polished ace.

Other objects and advantages of the construction described will be apparent to those skilled in the art, and changes in` details of the several parts are contemplated within the scope of the invention as defined by the appended claims.

In a. companion application, Serial No. 371,599, filed April G, 1920, the support for the lamp socket may be of rigid material and detachable from the casing. Many features herein disclosed are claimed therein, broadly.

I claim 1. In a battery hand lamp, the combination of a casing, a battery of dry cells therein, a lamp connected with one. terminal of said battery, a socket in which said lamp is threaded, a yielding disc of insulation supporting said socket, a reflector insulated from said socket and removable therefrom, and means for establishing electrical connection from the other terminal of said battory to said socket.

2. In a battery hand lamp, the combination of a battery, a lamp in operative relation thereto, a casing for said battery, a soft rubber disc closing the end of said casing and in which said lamp is mounted, and a reflector for said lamp removable therefrom without disturbing the operative relation of said lamp to said battery, substantially as described.

3. In a battery hand lamp, the combination of a battery, a casing therefor, a lamp. connected with said battery, a socket for said lamp, a yielding disc of insulation clos- 10o ing the end of said casing and supporting said socket, a reflector insulated from said socket and Inova-ble away from said lamp and socket, said reflector having a central opening through which the lamp bulb will pass, means for adjustably supporting said reflector in operative relation to said lamp, and means for completing the battery circuit through said lamp.

4. In a battery hand lamp, the combination of a casing having a threaded metal end, a battery therein, a lamp in operative relation to said battery, a socket for said lamp, an insulating disc threaded to the metal end of said casing, said disc being yielding in character to cushion any impact of the battery on said lamp, a reflector insulated from said socket, and means for moving said reflector with respect to the said socket when the distribution of light from said lamp is to be altered.

5. In a battery hand lamp, a casing, a battery therein, a lamp contacting with one terminal of said battery, a socket for said lamp, a yielding disk of insulation supporting said socket in said casing and cushioning any impact of the battery on the lamp and a reflector insulated from said socket and removable therefrom, substantially as described.

6. In a battery hand lamp, a casing, a battery therein, a lamp connected With one terminal of said battery, a socket for said lamp, a yielding disk of insulation permanently secured to said easing and supporting said socket, and a reflector insulated from said socket and removable therefrom, substantially as described.

7. In a battery hand lamp, the combination of a metal casing having a threaded front end, a battery therein, a lamp conneeted with said battery, a socket for said lamp, an insulating disc threaded to the front end of said casing and supporting said socket therefrom, a reflector for said lamp having a central opening through which the bulb of said lamp Will pa, and means for moving said reflector While maintaining operative relation between said battery and said lamp.

In testimony whereof I aiix my si ature.

, CHARLES F. BR ESS.