US2662968A - Flashlight lamp - Google Patents

Description

1953 P. SARABER 2,662,968

FLASHLIGHT LAMP Filed March 7, 1951 IN VENTOR lguires a relatively appreciable time. more, the conveyance ,of the two separate components, i. e. the :flash gun and the reflector, is

Patented Dec. 15, 1953 UNITED '?S TATES ENT 2,662,958

FLASHLIGHT LAMP eter S rabe qs ar, German Application March 7, 1951 SBIiQIINOJZlQZGI Claims -priority,appli cation1Germany:May2,-:1950

3 Claims. a

J! The invention refers to a flashlight-photography flash gun with folding reflector, especially already known, in which the-reflectorconsists of a ,numberof separate parts. In such case,.ho wever, the reflector when folded, cannot remain attached .to the flash gun. The preparation ,for

use of these known flash guns consequently re- Furtherexceedingly inconvenient.

Contrary to these known flashguns with reflectors, the reflector in accordance with the present invention consists of such thin, elastic foil, e. g. sheet steeLor sheet bronze, that it is easily rolled .up and ,after ,unrolling automatically assumes its original form. This new rollup reflector can be made-in one piece and remain firmly-attached to-its flash gun even in its rolled condition.

The reflector is rolled up by drawing or alternatively pressing it down into the flash gun casing in such manner that when rolled up the reflector is housed inside the said casing.

The flash gun casing is suitably provided in one side with a slope acting as a guide in rolling up the reflector.

In accordance with a specific form of arrangement the withdrawal of the reflector into the flash gun casing is effected by means of an operating button or the like, connected with the reflector and movable in a guide slot in the casing.

The advantages of the flash gun in accordance with the invention are essentially the very simple and consequently cheap construction, the instant readiness for use and the small dimensions of the reflector in the rolled-up state.

An additional advantageous feature according to the invention is that the displacement of the operating button in the guide slot of the flash gun casing not only serves to roll up or unroll the reflector but also enables the concavity of the reflector, i. e. its radius of curvature, to be adjustably varied.

The principle of the invention is applicable both to flash gun lamps of the type known by the trade-mark Vaku-Blitz and to flash gun lamps r of high-tension type, as well as to lamps working with flashlight powder.

The drawing represents an example of an arrangement according to the principle of the invention and shows further advantageous and novel ;features thereof. The drawin .Shows a flashlight-photography flash gun of the Valiu- Blitz type.

Figure 1 is a front view of the flashlightphotog-raphy gflash gun. comprising my invention shown fully assembled ready {for use;

.Fig. .2 is a side viewof the flashlight-photography flash gun shown in ,Fig. ,1

Fig.3 is a view (similar to Fig. 2, but showing the reflector partially retracted preparatory to afolding operation;

Fig. 4-. is a front view of the flashlight photography flash gun shown in Fig. 3 and ShOW-illgr'thfi partially retracted reflector;

Fig. 5 is averticalsectionalview through the fully-folded flashlight photography flash gun with certain parts shown in elevation;

Fig. 6 is ,a rear view of the flashlight-photog- 'raphy flash gun showing the reflector fully 9-4! of Fig. 5 showing the reflector fully nested in the casing; and

Fig. 10 is a perspective view showing the 00- action between the angularly disposed edges of the lamp casing and the angularly disposed edges of the reflector for facilitating the rolling and unrolling of the reflector with respect to the lamp casing as the reflector is moved longitudinally with respect to the lamp casing.

The flash gun consists of a barrel I with a lamp holder 2 receiving a lamp 3 of the Vaku- Blitz type, a base 4, an outer casing 6 and a reflector 8. One or more dry cells 5 can be accommodated in the usual manner in the barrel The casing 5 surrounds the barrel I in such manner that an annular air gap 1 is left between the barrel and the casing 6.

The reflector, which may be of other form than here shown, consists of a thin foil 8 of suitably resilient material, e. g., sheet steel or sheet bronze. The reflector 8 is provided with an operating button 9 movable in a longitudinally disposed guide slot is in the casing in such manner that by moving the button 3 the reflector 8 can be drawn down into the air gap 1. By suitably forming the slope of edges l2 of the casing 6 on opposite sides of a central recess 15, the reflector 8 is caused to roll up on itself when the edges l5 thereof are drawn down by the action of the button 9 against the edges I 2 of the casing which serve as lineally extending cams for guiding the reflector. The opposite sides of the upper peripheral edges of casing 6 are cut-away in a recess l5 and are angularly inclined downwardly from positions spaced substantially more than 180 to a substantially V-shaped terminus rounded at the bottom of recess [5 in the top of the front of the casing facing forward in the direction of the light rays reflected by the reflector 8. The upper part [3 of the casing 6 and the lower part II of the reflector 8 are suitably so shaped that the curvature of the reflector 8 in its highest position is only slight. The guide slot I is located in the rear of the casing extending from the upper part [3 of the casing to substantially the bottom of the casing. That is to say, the slot H] is located in part of the Wall section of maximum length. The edges [5 of the lower part ll of the reflector 8 are formed on an angle a with respect to the slope of edges !2 which is slightly obtuse, so that edges l2 and i6 coact to effect the rolling and unrolling of the reflector 8 as button 9 is moved. The concavity or curvature of the reflector 8 can be adjusted at will by drawing down the operating button 9 more or less into the guide slot l0. By this means, curvatures of different radii can be obtained on the reflector 8, according to the conditions of exposure. The rectangular slot 1 M in the base 4 serves for the attachment of the flash gun on a holder.

I claim:

1. A flashlight-photography flash gun comprising a cylindrical barrel adapted to house current-storing and supplying means, a lamp holder at one end of said barrel adapted to support and hold a lamp externally of the latter, a cylindrical outer casing surrounding said barrel and spaced therefrom around the longitudinal external wall periphery thereof, said outer casing being partly cut-away at its end adjacent the lamp holder to provide a tapered guideway having opposite edges inclined to the longitudinal axis of the casing from positions spaced substantially more than to a terminus in the front of the casing and said casing having a longitudinal slot in a part of its wall section of maximum length, a reflector of elastic metal foil housed in the space between the barrel and the outer casing, with its central longitudinal axis immediately adjacent said slot, said reflector having upwardly inclined opposite edges coacting with the inclined edges of said guideway, and a stud secured to said reflector on the longitudinal axis of the latter and protruding through said slot to the exterior of the outer casing for moving the reflector longitudinally from its housing to a position adjacent the lamp holder, and vice versa, said, upwardly inclined edges of said reflector and the downwardly inclined edges of said guide- Way coacting through a camming action to control the unrolling and rolling-up of said reflector.

2. A flashlight-photography flash gun as set forth in claim 1, in which the downwardly inclined edges of said tapered guideway and the upwardly inclined opposite edges of said reflector are related to each other by angles that are slightly obtuse.

3. A flashlight-photography flash gun as set forth in claim 1 in which the edges of the recess constituting the tapered guideway in the front of said casing intersect in a substantially V- shaped terminus.

PETER SARABER.

References Cited in the file of this patent UNITED STATES PATENTS Number

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