US2225012A - Portable device adapted for daylight projection - Google Patents

Description

Dec. 17, 1940. K K LU H 2,225,012

PORTABLE DEVICE ADAPTED FOR DAYLIGHT PROJECTION Filed Doc. 15, 1937 Patented Dec. 17, 1940 PORTABLE DEVICE ADAPTED FOR DAY- LIGHT PROJECTION Kamillo Kallusch, Prerov, Czechoslovakia, assignor to Optikotechna spolenost s r. 0., Prerov, Prerov, Czechoslovakia, a Czechoslovakian com- Deny Application December 15, 1937, Serial No. 180,038 In Czechoslovakia December 23, 1936 4 Claims. (Cl. 88-24) The present invention relates to a portable disposed plate 5, which may be conveniently device adapted for daylight projection, the said adapted to constitute a projection screen. device being particularly suitable for veterinary The plates 3 and 5 are stiffened exteriorly purposes, as, for example, in connection with thereof. by means of flat end rings 8 having cir- 5 trichinoscopes. cumferential rings 1 connected thereto. On the A portable device of the above-mentioned charrings 1, a black waxed linen screen l, for example, acter requires to be capable of being erected and is fixed, whereby a CflSing is formed w y dismounted both readily and expeditiously. serve as a dark room suitable for projection even Furthermore, it is required that the weight of in daylight.

10 the device shall be a minimum, whilst capable e p ates 3 and 'a e connected by ig d stif- 10 of being folded up compactly so as to occupy fening elements which, in conjunction with the relatively small space during transport. bases, i'orm the frame-work of the projection With these objects in view, the device accord- Chamber- The Said elements y consist o ing to the present invention comprises a hollow Struts which, in t p e o n, are

body having two bases, one or which is provided connected to the rings 1 by means 0! screws H. 15 with a projection screen and the other with an s d O C E Spring Ca es 01 other Su taopening for the passage of light rays, or for the ble connecting means y be e p oy dobservation of a projected picture or the like, The length 0f t e Struts III is less than the dit cover of t bQdy being rigidly fixed t t ameter of the circular plates 3 and 5, so that bases and so arranged that it is capable of being it is Possible to lay these between the ring! 7 20 folded up by laying the bases on top f one when the chamber is folded up after loosening m the screw or other connections. On account of In order that the said invention may be clearly the waxed linen Screen a being foldablev understood and readily carried into eilect, the P of the folded chamber is equal to same will now be described more fully by way proximately equal to that o! the interconnected 25 of example, with reference to the accompanyrmgs 1 durmg transportmg drawing, in which: The struts Ill may be replaced by links i3, 13',

Figure 1 is an elevation showing diagrammatias shown m figure or by mgglenke support cally adevice embodying the invention arranged mg r as usedm Photographic apparatus thus relatively to projecting apparatus, penmmng the ,foldmg up of the chamber 30 Figure 2 is a cross section of the device deeffected expeditiously In the embodiment shown in Figure 5, the

gi g g i l g g casing of the chamber, in which the projection we 5 u n sec 0 he screen is arranged, consists-of light metal rings vice taken at right angles to Figure 2,

I2 hi h i Figure 4 is a longitudinal section She a w c can engage w th one another in a telemodified constructional form of device, and 22:5 i f g g gga g g gg Figure 5 is a view similar to Figure 4 but tended poslflqn, slfioiwing a further modifledconstructional i'orm The body t formed is arranged on a t. 0 evice. able under frame I Referring first more particularly to Figures 1, permit, of ready trai is also collapsible to 2 and 3 of the drawing. l d n s the j It will be understood that the devices above me appar us sa trlchinoscope. which i described and illustrated are given only by way ranged on a suitab e lower frame. as Shown in of examples of embodiments of the invention 5 l l ur 1. The p ta e d vi e co di to the and that the individual details, particularly for is invention, Which is provided with a projection retaining d securing t um e t screen, comprises two bases 3 and 5, which are can be varied inmany ways without departing made of a li h m e i l. sfrom h t p yirom'the essence ofthe invention, wood, in order to facilitate transport. In the What lcleim is; examples illustrated, the bases 3 and ,5 form two circular plates, of which the plate 3 is provided with a suitable opening l for the passage 01 the projected light rays. The opening 4 is large an opaque screen supportedb on e of said lates enough to permit the o serv tion f a'p c ur on which the image is projected the other plate image or the like projected on to the oppositely having an b ti openlng t i a 11 m,-

particularly for medical and veterinary purposes comprising twosimilarly shaped end plates,

1. Portable apparatus for daylight projection 50' 3. Portable apparatus according to claim 1, in which members connect the end plates and said members have the form of bars which are attached rigidly but easily detachable to the periphery oi the end plates. 5

4. Portable apparatus according to claim 1, in which the housing comprises light metal, telescoped rings, and the outermost rings are rigidly connected with the end plates.

10 KAMILID KALLUSCH.

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