US1751432A

US1751432A - Focusing flashlight

Info

Publication number: US1751432A
Application number: US207919A
Authority: US
Inventors: Lee G Voorhees
Original assignee: Nat Carbon Co Inc
Current assignee: National Carbon Co Inc
Priority date: 1927-07-23
Filing date: 1927-07-23
Publication date: 1930-03-18
Anticipated expiration: 1947-03-18

Description

Patented Mar.-18,.1930

PATENT OFFICE LEE G. VOOBHEES, OF LONG ISLAND CITY,

NEW YORK, ASSIGNOB TO NATIONAL GABBON COMPANY, ING., .A. COBPORATION OF NEW YORK rocusmc masanena Application filed July 23, 192?. Serial No. 207,99.

This invention relates to electric hand lamps of the type having a bulb, and a battery within a singlecasing, an more particularly to the method of mounting the bulb and reflector within the casing, and to the method of securing relative movement between them.

Focusing hand lamps in which the bulb and reflector may be moved relatively to one another are well known and may be divided into two Glasses: the first, including those in which the bulb is moved relatively to a fixed reflector and; the second, including'those in which the reflector is moved relatvely to a fixed bulb. The diflerence between the han lamps of the two classes is chiefly in the method of securing the result.

In hand lamps of the first class, the bulb is usually carried by a socket that slides in a sleeve attached to the apex of the reflector. The hearing between the socket and the 'sleeve is usually so short, and the clearance between them so great, that the lamp may tip sidewise until its filament is farther from the focal point of the reflector than it might be in a non-focusing hand lamp.

In hand lamps of the second class, the bulb is usually carried by a socket attached to a diaphragm which in turn is secured to the fitting that screws over the end of the casing. As the bulb moves through a clearance opening in the apex of the reflector there is consequently no direct connection between the bulb and the reflector to insure their correct alignment. Therefore, in this class of hand lamp also, the focusing movement may be incapable of bringing the bulb filament into coincidence with the focal point of the reflector.

The direction of the focusing movement is usually along the axis of the reflector and to be effective the reflector and the bulb must be in axial alignment. In some instances such is not the case, as' has been already pointed out, consequently, the axial misalignment defe'ats the purpose of the focusing adjustment in most hand lamps.

Therefore, one of the objects of this invena reflector,

d the reflector of a hand lamp and, at the same casing, and the reflector is carried by a head 7 tion is to-provide a means of securing axial focusing adjustment between the bulb and time, to hold them in axial alignment. How this and other objects and aims of the invention are accomplished will be readily understood from the following description when taken in connection with the illustration which shows a sectional view of a hand lamp embodyinths invention. In the awing 13 designates the usual cylindrical casing which ma be. either of insulating material, such as ber, or of conductive material, such as brass or iron. Withn d the casing 13 is the usual battery 15 composed 35 of two or more dry cells placed end to end and connected in series by being held in' contact with each other by the conductive battery supporting spring-18 seated within the end cap 17 which is threaded to the casing 13 in the usual manner. Resting against the top of the casing 13 is a disk 7 which is preferably of insulating material, such as fiber, and is approximately the same outer diameter as' the casing. casing 13 and the disk 7 is a collar 4 which s' secured to the casing 13 by the rivets 5. The g upper edge of the -collar 4: is turned inward forming the flange 4' which rests against the disk 7 thereby securing it to the casng 13.

Upon the upper side of the disk 7 is the lamp socket 19 having a cylindrical portion 19' threaded both inside and outside and a flangelike portion 19" which is attached to the disk 7 by the rivets 8. Within the lamp socket 19 is the usual lamp bulb 11. Passing through the central portion of the disk 7 is the rivet or eyelet 6 which connects the central terminal of the bulb 11 to the central terminal of the battery 15. go Threaded upon the outside of the socket 19 is a bushing 3 which is secured in an opening 12' in the apex of the reflector 12 but is insu- 'lated therefrom by the insulation 2. In some cases the bushing 3 and the insulation 2 may be eliminated by turnng the edge of the reflector opening 12' downward and threading it to fit the outside of the lamp socket19.

The cover glass 10 and the reflector 12 are secured to the upper end of the head 20 by. the

Fitting closely around both the 75 bezel 9 in the usual manner. At the bottom of the head 20 is a cylindrical projection 20' surrounding and slidably mounted on the collar 4 thereby supporting the head 20 upon the 'casing 13 but permitting rotary and' axial movement between the head 20 and the collar 4: which forms a part of the casing 13. Thus the reflector assembly comprisin the reflector 12; bushing 3, cover glass 10, ezel 9, and head 20', is adjustably mounted upon the lamp soeket 19 and movably mounted 'upon the casing 13. A switch 16 mounted i of both the bulb 11 and the casing 13; As the reflector assembly is threaded directly to the lamp soeket relative radial movement between the bulb and reflector cannot occur, and as the reflector assembly is supported upon the cas ing relative tilting between the bulb and rebulb and reflector are held in axial alignment throughout the range of the foousing movement. v

I claim: r

1. In an electrie hand lamp, the combination of a casing having a battery thei-ein; a disk resting upon one end of said casing; 'a flanged collar securing said disk to said casing; a threaded lamp soeket Secured to said disk; a refieotor having an aperture threaded upon said lamp soeket; a head fitting movably mounted upon said collar; a cover glass over the open end of said refleotor; a bezel securing said cover glass and said reflector to said head fitting; a lanp in said lamp soeket; a conductive rivet in said disk con- 'necting one terminalof said lanp to one terminal of said battery; and means completing the circuit from the other terminal of said lamp to the other terminal ofsaid battery.

2. In an electric hand lamp, the combination of` a casng; a disk attached to one end thereof; a lamp soeket mounted upon said disk; a reflector threaded upon said lamp soeket; a head fitting rigidly Secured to said -reflector and movably mounted upon said easig; a lamp in said soeket; a battery within said casing; and means completing the eirouit through said lamp and said battery.

3. In an electric hand lamp, the combination of a casing; a disk mounted upon one end thereof; a lamp soeket mounted upon said disk; a refiector threaded upon said lamp socket;-and a head fitting rigidiy secured to said refiector and movably mounted upon said casing.

4. In an electric hand lamp, the combination of a casing; a disk resting upon one end thereof; a', Collar securing said disk to said casing; a lamp soeket mounted upon said disk; a reflector threaded upon said lanp soeket; and a head fitting rigidly secured to said reflector and movably mounted upon said collar.

5. In an electric hand lamp, the combination of a casng; a disk 'esting upon one end thereof; a collar mounted upon said casing and having an inturned fiange securing said disk to said casng a lamp soeket mounted 'tery.

6. In an electric hand lamp, the combination of a casing; a disk mounted upon one end thereof; a lamp soeket mounted upon said disk; 'a b'ushing adjustably mounted upon said lamp soeket; a reflector rigidly secu'ed to said bushing; and a head rigidly attached tosaid refiector and movably mounted upon said casing. flector s eflectvely prevented. Thus'- the 7. In an electric hand lamp, the combination of a casing; adisk mounted upon one end thereof; a lamp soeket mounted upon said disk; a bushing adjustably mounted upon said lamp soeket; a reflector rigidly Secured to said bushing but insulated therefrorn; a head rigidly attached to said reflector and .movably mounted upon said casing; a lamp in said soeket; a battery in sa'idcasing; and means completing the circuit through said battery and said lamp.

8. In an electric hand lamp, the combination of a casing; a lamp 'soeket rigidly mounted upon one end thereof; 'a lainp bulb in said lanp soeket; a refiector assenbl y co'mprising a head, cover glass, bezel, and reflector threaded upon said lamp soeket and movably mounted upon said casingj a battery within said casing; and means completing the circuit through said lamp and said battery.

In testimony whereof, I afliX my signature LEE Gr. VOORHEES.