US2544388A

US2544388A - Photographic flash gun

Info

Publication number: US2544388A
Application number: US775946A
Authority: US
Inventors: Lang Theodore
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-09-24
Filing date: 1947-09-24
Publication date: 1951-03-06
Anticipated expiration: 1968-03-06

Description

March 6, 1951 T. LANG 2,544,388

PHOTUGRAPHIC FLASH GUN Filed Sept. 24, 1947 2 Sheets-Shem l INVENTOR. Tkeockre L ng BY M! March 6, 1951 T. LANG PHOTOGRAPHIC FLASH GUN 2 Sheets-Shae; 2

Filed Sept. 24, 1947 INVENTOR.

Patented Mar. 6, 1951 u'mv'r so, or F o e 2,544,388. PHG-TOGRAPHIG WASH g I Theodore Lang; Flushing, n. Y. Kpplic'atibn septei'nber 24.1' 9rm1s'eriaiiqo. Where which is engaged by: the lamp: bulbiasa th'esame is inserted into the socket and; whereinvthe top part has projection-s5 whiclrneed togbe extended downwardly into the battery cas'ingupon making theoonnectionor the top: part therewith and wherein theton part has aswitclr for th'ebulb. 1 v

Another: object: of the. present invention to provide aniarra-ngementifor using the centerrof the: reflector to: as a means: for connecting the reflector to; thesocket, the socket lreing or simple construction and-easily assembled. upon the reflector:

Qther objects of the: presentainvention: are: to-

provide. reflector construotionsa ior' flash gun's which are. of simple construction, easy to attach to. the flash gun socket inexpensive ta manufacture and efiieie-nt inoperation;

According to thei'nventiom theaflash gun has the usual battery case in which batteries are stored and the: top of the 'guni I a cap havinga horizontally extending part with: asocketopening at one end and a switch at the opposite end adapted to be depressed to ignite the flash birl-b. Within 'this top part is a plunger: adapted to beengag'ed the lamp bulb when placed in position. The reflectors are. pro. vided withvadaptor having threads. which engage with the threads'bf the socket ofthetop part.

Internally of the socket threads are longitudi'nalh} extending contact: terminals which. extend outwardly through thesocliets fromari'ng formation containing. the plunger contact; The lamp bulb: will beinserted: intothe reflector and into the socket andagainst the contact projections lying therewithinand will depress the contact plunger centrally to establish the connection of the bulb with tlie pluh-ger. The may also lee-provided with the usual shutteropcrating device for the camera.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawing forming a material part of this disclosure:

Fig. l is a perspective view of the completely assembled flash gun embodying the ieatures oi the present invention.

dee with (chem-(1.3.);-

2 I Fig. '2" is an en-Iarged s'i'd'e: elevat'i'ohal view of the flash gun with the reflector and bulb removed therefrom-and looking upon the side race of the 913 part;

Fig. 3 i'sa rragmemary front elevational View of the? ashguniwi th the reflector removed.

Fig; 4 is a longitudinal cross sectional. view taken on line I-J-o'f Fig.- 3. r

5 is a. transverse vertical cross; sectional View taken airline 5-5 "of Fig; 42.

Fig. 6 a horizontal cross sectional view taken on line or Fig. 3';-

Fig. T is-an eievationakview of one form oneflector Fig. 8 'is an enlarged crossssecti'onal view taken on Iine"8 -*-8 tif F-fg; 7 Fig. 9* isv an 'el'evational v iew of another form "or reflector.

Fig. 1a is a crosssectional view taken on RT -I 0 ofFig. Fig. 11 is an elevational view of still another "th t'o'ii df theibattery casing Z'Iythere i'S C'Qltnected a top part-M extending:transverselyaeross Qtlie'top em t bf'th'e battery casing 2t andser'uing i-r's a support-for arefiector 25- and a flash bulb 26. This top part 24 has 'a-cover member: 21 adaptedtobe'fittedi' overf the top of the battery casing and secured thereto by iastening screws 282 A. battery terminal 25* will: extend. upwardly "through an'opening'inthe toptpart M (Fig. e); tor

receivingawireconneetions ll which is connected directly to: a; switchfelement 32: fixed to; the rear endoti the top part -24iand;operated by a-switch buttomu whiehmasrbe depressediito close the electric current to the flash bulb 2B.

The opposite end of the top part 24 is enlarged as indicated at 34 and has internal threads 35 for receiving external threads 36 of a reflector. InWa-rdly of these internal threads 35 are projections 31 carried on a ring formation 38 which surrounds a plunger device 39 having a plunger element 4| therein. These projections 31 serve to receive the inner end of the flash bulb 26 as the same is extended into the socket to'depress the plunger element 4|. The plunger device 39 is connected by a wire connection 42 with the receive a central sleeve 49 which is locked in I place on the sleeve 41 by a collar threaded onthe sleeve 49. The threads 36 are provided upon the sleeve 49. The sleeve 41 may be fixed to the rear face of the reflector casing byrivets'52.

upon the same being inserted into the socket opening, wire connections extending between the plunger device and the switch and batteries lying within the battery casing, a reflector having a threaded portion, said socket opening having internal threads adapted to receive the threaded portion of the reflector, said reflector comprising a casing and an element extending centrally therethrough and having the external threads thereon, said element further including a portion for receiving the flash bulb to retain the same, said portion being in the form of a Referring now to Figs. 9 ,and l0, the re isshown a simplified thread formation on the reflector. A single sleeve 53 is used and its flange-fen gages with the inner face of the reflector and can be retainedthereagainst-bya solder connection. v

Referring now toFigs. 11, 12 and 13, there is shown still another form of the invention in which a sleeve 56 is provided with an internal angularly extending socket portion 5!v adapted to receive the lamp bulb. This socket portion has an opening 58 in the bottom through which the plunger 4| ,of the top part will extend for engagement with the contact terminal on the :bulb. The projections 31 will enter recesses 59 of the sleeve 56. The sleeve 56 has a flange 6i and this flange is fastened to the casing of the reflector by rivets 62. '1

Plug receiving sockets 64 are provided in the battery casing for the connection thereto of an electrically operated shutter tripping device arranged to trip the shutter at the-instant of -maximum intensity of'the flash lamp carriedon the top part 24 and fired by depressing button 33' of the switch 32.

It is to be understood that these reflectors have no cut-out portion, :which increases the light reflection considerably as compared to the standard reflectors with cut-outs.

While I have illustratedan'd described the claim as new, and desire to secure by United States Letters Patent I is:

l. A flash gun comprising a battery casing "adapted to house the batteries, a top part extending transversely across the upper end of the battery casing "and. having a cover member adapted to fit over the battery casing,;saidtop part having a switch at one end and a 'socket opening at the other end, a plunger within the top part adapted to be engaged by a flash bulb sleeve lying concentric with the threaded portion and having an opening in its bottom end through which the plunger may extend for engagement with the lamp bulb. 2, A flash gun comprising a battery casing adaptedto house'the batteries, a top part extending transversely across the upper end of the battery casing and having a cover member adapted to flt'ov'er the battery casing, said top part having a switch at one endand a socket opening at the other end, a plunger within the .top part adapted to be engaged by a flash bulb -upon the same being inserted into the socket opening, wire connections extending between the plunger device and the switch and batteries lying within the battery casing, a reflector having a threaded portion, said socket opening having internal threads adapted to receive the threaded portion of the reflector, said reflector comprisinga casing and an element extending centrally therethrough and having the external threads .thereon, said element further including a portionv for receiving the flash bulb to retain the same,'said portion being in the form of a sleeve lying concentric with the threaded portion and having an opening in itsbottom end through which the plunger may extend for engagement with-the lamp bulb, said socket opening on the top part having terminal projections extending longitudinally of the opening and radially spaced therefrom, said threaded .portion of the reflector element extending into the base between the contact terminals and the internal threads, of (the socket opening of. the top part; ,r' THEODORE LANG.

, A REFERENCES CITED Thefollowing references are of record" in the file of this patent: i

' UNITED STATES PATENTS France May 18, 1934