US1394101A - Electric handlamp - Google Patents

Description

B. A. LITTLE.

ELECTRIC HANDLAMP.

APPLICATION FILED SEPT. 8. 1919. 1,394,101, Patented 0011. 18, 1921.

Inventor HQ; fm

UNITED STATES PATENT OFFICE.

BERT AUSTIN LITTLE, OF TULSA, OKLAHOMA, ASSIGNOR OF ON E-HALF TO J'. W. DODGE, OF TULSA, OKLAHOMA.

ELECTRIC HAN DLAMIP.

Application led September 8, 1919. Serial No.

T 0 @all 'whom it may concern:

Be it known that I, BERT AUSTIN LITTLE, a citizen of the United States, residing at Tulsa, in the county of Tulsa and State of Oklahoma, have invented certain new and useful Improvements in Electrical Handlamps, of which the fdllowing is a specification.

My invention relates to electric hand lamps of the tubular type, having the lamp at the end, the controlling switch on the side, and the battery within the tube.

It is the object of my invention to provide two lamps, one' at each end of the tube, a single battery lwithin the tube, and a single switch conveniently arranged for controlling the current to each lamp. It is the further object of my invention to provide the parts, improvements and combinations hereinafter set forth.

My invention consists of certain mechanical arrangements and improvements in the construction of such devices whereby the object sought is attained, as hereinafterset forth and claimed.

In the drawings accompanying and forming part of this specification and in the description of the drawings, I have shown my invention in its preferred form and what I deem to be the best mode of applying the principles thereof; and it is to lbe understood that, Within the scope ofthe appended claims, I contemplate changes in form, proportions and materials, the transposition of parts and the substitution 'of equivalent members, without departing from the spirit of my invention. j

Figure 1 is a longitudinal sectional elevation, approximately on a plane indicated by the line 1 1, Fig. 2, of a hand lamp made in accordance with the principles of my invention, parts of the dry cells and inner tube being broken away. Fig. 2 is a view of the left-hand end, the near cap and lamp being removed. Fig. 3 is a view of the right-hand end, the near cap and lamp being removed. Fig. 4 is a cross sectional elevation on a plane indicated by the line 4 4, Fig. 1, the battery and inner tube being removed. Fig. 5 is a side elevation of the middle portion of the tube showing in particular the switch. Fig. 6 is a longitudinal sectional elevation, on a plane indicated by the line 6-6, Fig. 4, o-f the tube Specification of Letters Patent.

with the parts permanently attached thereto, the middle portion being broken away.

'Similar reference characters indicate similar parts throughout the .several views. The tube 7 forming the handle and casing is of fiber or other suitable insulating material, and is provided at each end with a metal screw-threaded rim 8 and 9. About Patented oet. 18, 1921.

midway between the ends a metal bracket 10 is fastened to the side of the tube by means of rivets l1, 11, and forms a way for the contact spring 12 which bears with tension between said bracket and the side of the tube.- A pin 13 is secured to the spring and extends through the longitudinal slot 14 in the bracket and is provided with an operating button or thumb-piece 15 whereby it may be pushed back and forth in the way to bring the contact spring into contact with the contactrivets 18 and 19- respectively. The contact spring is shown in the drawings in neutral position, in contact with neither rivet. Two thin metal straps 16 and 17 connect the rivets 18 and 19 with the metal rims 8 and 9, respectively, they being soldered or otherwise secured thereto.

A cap is provided for each end of the tube having screw-threaded engagement there-l with. Thel one is comprised of the rim 24, lens 23, reflector 22 and lamp 20. The other comprises the rims 27, lens 26, reflector 25 and lamp 21. While these are of different types so far as refiectors and lenses are concerned, it will be understood that any type may be used on either end.

Adjacent to one end of the tube is a partition or stop 28 'extending transversely of the tube and here shown as made of insulating material, such as hard fiber. Secured to the side facing the shorter end of the tube, by means of rivets 33, 33, is a metal plate 29 formed with a centrally located bent-over Contact spring 32 and with out-turned ends 30, 30 whereby the partition is firmly secured in position, by means of rivets 31, 31 passing through the walls of the tube. These parts are so arranged with relation to the a'djacent cap that when said cap is screwed onto the end of the tube, the end contact of the lamp makes a compressing contact with said contact spring 32, as indicated in Fig. 1.

Secured on the other side of the partition i end to the end of the tube where it terminates in a loop t dicate 41, the tube being here slightly cut away and the ad'acent rim being also cut away, as inat to avoidcontact between said strap or the conical spring hereinafter mentioned and said rim. A loop 42 formed of the end of the wire forming a conical coil spring 43 passes through the loop 41, making a hinged connection of said conical spring' with said stra and secured centrally of the tube to said conical sprin is a contact'plate 44. By means of this hinged connection, the conical spring mayY be swung away from the tube opening to permit the insertion thereinto of the inner tube and dry cells about to be described.

The straps heretofore described are, las

stated, thin, are laid closely against the inv ner side of the wall of the tube, leaving substantially the entire tube free for the re- 4 ception of the battery.

The battery is made up, as shownin the drawings, of three dry cells 47, 47, 47, eachhaving a metal end and casing formingone pole thereof and a metal nipple 48 at -the other end forming the other pole, so that by alining them end to end under pressure suilicient to make the contact they are properly connected in series. They are inclosed in a straw-board tube46 and the whole inserted intol the main tube, ni ple end first,

A -the nipple of the first dry ce l making con-A tact with the contact plate 34, as shown in Fig. 1. With the inner tube and dry cells in place, the conical spring is swung into-position with its base bearing against the end plate of the last dry cell, and then the lamp cap is screwed onto the end of the tube, the

end contact` of the lamp therein making contact Iwith the Contact plate 44, the stress of the conicalspring serving not only to lmake firm contact between the contact plate 44 and the lamp, but also between'the'contact plate 34 and the adjacent contact nipple, and serving also to lhold the dry' cells firmly in.. place. .A n The construction herein shown serves to provide twolamps in the place where one has heretofore, been'provided. without materially addin to the weight of the :hand lamp, `and ad ing but little to the ex'pense of manufacture. The invention is adapted to a wide variety ofuses; for instance, two

different types of caps may be used; or the.

. shifting the switch to the right to bring the spring into contact with the rivet 19, the current will pass through the lamp 21, the circuit then comprising the parts 19, 17, 9, 27, 25, lamp 21, 44, 43, battery, 34, 36, 11, 10, 12, 19. On shifting the switch to the left to make contact with the rivet 18`the current will pass through the lamp 20, the circuit then comprising the parts 18, 16, 24, 22, lamp 20, 32, 29, 30, 40, 43, battery v34, 36,' 11, 10, l2, 18.

Although I prefer to make the tubeof insulating material, it will be understood that it may be'made of other material by providing suitable insulation for the several conductors,

Having thus described my invention, what I claim is:

1. In a device of the kind described, the combination of-a tubular casing adapted for the reception of a battery, a stop adjacent to one end having-a contact piece adapted to contactwith one pole of a battery, a conical coil spring' hinged thereto at the other end and adapted to make contact between theother pole of the battery and an adjacent lamp, a lamp at each 'end of said tube, a contact spring adapted tomake contact with the other amp, a conductor connecting said conical spring and said contact spring, a three-point switch on the side o'f the tube, conductors connecting two points of said switch with the lamps respectively, and a conductor connecting the first-named contact plate with the common'pointl of said switch.

2. In a device of the kind described, the combination of a tubular casing adapted for the reception of a battery, a stop therein adjacent to one end, a conical coil spring hinged thereto at the other end, a lamp secured to said tubular casing at said other end, a battery within said casing between said stop and said coil spring, and suitable electrical connectors and a switch between said battery and said lamp; said conical coil spring forming part of said line of connectors for forming'contact with the lamp and being adaptedto be swung on its hinge out of the way to permit the insertion and withdrawal of said battery.

`In testimonywhereof I have afiixed my signature.

- BERT AUSTIN LITTLE.

Images