US1835176A - Spotlight projecting machine - Google Patents

Description

A. J. OBERG ETAL SPOTLIGHT PROJECTING MACHINE Filed Feb. 29, 1928 ATTORNEY.

Patented Dec. 8, 1931 v[narran STATE-s PATENroFFICE l.ANTON J'. OBERG ANDVROBERT It. STGEFEN, OF LOS ANGELES, CALIFORNIA SPOTLIGHT BROJ'ECTING MACHNE Appneanon med retruary 29, 192e.l seria; No. 258,065.

. This invention relates to spotlights par.- ticularly useful, for theatrical purposes and the general object of the invention is to proj vide an improved spotlight projecting machine for producing spotlights of different designs in various colors, which machine may be readily and accurately adjusted to focus the light, and l taken apart. I Y A more particular object is to provide a spotlight machine "with improved Ventilating means to prevent overheating'thereof'.v

' Aiurtheriobject is to provide a spotlight machine of the character stated which will be simpleV in constructionand highly efficient` in operation. A

The invention is illustrated in the annexed drawings which form a part of this4 speci* fication and 4in which: Figure 1 is a perspective View of my snot* light machine with the casing' partly broken away to show the mechanism of the machine. .Figure 2 is a fragmentary crosssection of the casing as seen where Vbroken away in the right hand portion ofFigure 1.

Figure 3`is a fragmentary rear viewof the reflector and its adjusting means.

Corresponding-'parts are Vdesignated by the same reference characters in all the Vfigures. Our invention includes 'generally a casing 1, a slide holder 2, a reflector 3, a projecting light 4, a magnifying lens 5, a multicolored transparent wheel 6, `a blower 7, and a motor8. A. i The casing 1 ismade in two sections, a lower section 9 and an upper section 10, the upper section being'longitudinally slidably mounted ,on the lower section by means of' slide. jointsll on the side upper and lower edges ofv said lower Vand upper sections. The joints 11 are formed by bending the upper side edges of the lower section) first outwardly at 12, then upwardly at 13, thenl inwardly at' 14, and then downwardly Vat 15,

and by bending the lower side edges ofV the upper section 1() first outwardly at 16 andV then upwardly at 17. Thebent portion 12 of lower section 9 forms a shoulder upon which slidably rests the lower edge portion 16 of may be readily assembled orr upper section 10, while the portions 15 and 17 intcrengage to hold the upper section 1() in sliding relation on the lower section (see Figure 2). The upper edge of the forward end of the lower section 9 of' the casing is formed with an external flange 18 while the lower '55.`V

edge of the forward end of the upper section 10 is formedwith an inturned flange 19 which engages the undei` side of the flange 18 when the upper section is retracted on the lower f section. A lens 2() is provided in the front 3 end wall of the upper section 10 of the casing 9.

In the frontend of the lower casing section 9 is secured a frame 21 formed with a base v 22 and a .pair of upstanding vertical members .5 23 and 24. A bar 25 which may be'square in cross section is secured at its forward end to the frame member 24 while the rear end of said bar extends into a sleeve 26, in the rear end of which sleeve is secured a screw block 27 with which a screw 28 engages which screw extends through and is journaled in the rear end wall of' the lower casing member 9there being a pair of washers 29 and 3() secured on said screw which washers engage the inner and outer sides of said rear end wall. A thumb wheel 30is secured on the rear outer end of the screw 28 for turning thesame. The screw 28 and sleeve 26 support the rear end of the bar 25. On the 8 outer end of the screw block 27 is secured a bearing plate 31 formedlwith a plurality of bearings 32, 33, 24 and 25, through which extend adjusting rods 36, 37, 38 and 39 respectively for the slide holder 2, reflector 3, light u 4 and magnifying lens 5.

vTheslide/holder 2 is formed with a sup` porting member 40 and a sleeve 41 which slides on the sleeve 26,V whereby the slide member is slidably mounted on the sleeve 26. On the sleeve 41 is formed a lug 42 through which extends the inner threaded end 43 of the adjusting rod'36, said threadedend being in threaded engagement with said lug. The slide holder 2 exten ds transversely of the upper section V10V of the casing 1 and is formed with plates 44 at its ends which cover atall times openings 45 in the side walls fof said upper section, allowing for a short adjusting or focusing movement of the slide holder lon- Yea gitudinally of the casing without escapement of any light from the casing through said openings. rlhc rear end of the rod 36 extends through the rear end wall of the lower section 9 of the casing l and a knob 46 is secured on the rear end of said rod. A pair of washers ll7 and 48 are secured on the rod 36 in engagement with opposite sides of the plate 3l so that when the rod is turned one way or the other the engagement of the screw end t3 of said rod causes the slide holder 2 to be adj usted forwardly or backwardly. The slide holder is provided with the usual light openings 2m and 2?) in its rear and front walls respectively through which openings light is projected by the light la The reflector 3 is mounted on an arm 50 formed with a sleeve 5l which is slidably mounted on the sleeve 26, the refiector being formed at its rear with a stud 52 which projects through a vertical slot 58 in the arm 50 and is threaded to receive a nut 54, there being a washer 55 fitted on the stud against the rea-r face of the arm against which washer the nut 5d binds for adjustably securing the reflector on the arm for vertical adjustment. ri lug 55 projects rearwardly from the upier edge of the reflector, through which lug a screw 56 extends which screw engages the upper end of the arm 50, there being a shoulder 57 and a collar 58 on said screw engaging the upper and lower sides respectively of the lug` whereby, upon turning the screw 56 the reflector is adjusted vertically either upwardly or downwardly. The inner end of the rod is threaded at 59 for engaging the arm 50 whereby said arm and the reflector 3 may be adjusted longitudinally of the casing l or towards or away -from the light fl and slide 2. Washers 6() and 6l are secured on the rod 37 adjacent opposite sides ofthe plate Si for holding the rod against longitudinal. movement so that its screw may adjust the arm 50 and reflector 3. A thumb wheel 62 is secured on the outer rear end of the rod 37 for turning the same.

The base 62E is secured on a sleeve 6ft slidably mounted on the sleeve 26 and a lug 65 depends from the sleeve 6st which lug `is engaged by the threaded end 66 of the rod 3S. A pair of washers 67 and 66 are secured on the rod 38 adjacent opposite sides respectively ofthe plate 3l so that upon turning the rod the threaded end 66 engaging the lng 65 will cause the sleeve 64e and light s@ to be adjusted longitudinallyV of the casing l or toward A thumb wheel 69 is secured on the outer rear end of the rod 38 for turning the same.

The magnifying lens 5 is mounted on a sleeve 70 which is slidably mounted on the sleeve 26 and is formed with a lug 7l which is in threaded engagement with the threaded end 72 of rod Collars 7 3 are secured on the rod 39 in engagement with the plate 3l to hold the rod against longitudinal movement but to allow the rod to turn so that its threaded end 72 engaging lug 7l will adjust the sleeve 70 and lens 5 longitudinally toward or away from the slide 2 and color wheel 6. A thumb wheel 74 is secured on the outer rear end of the rod 39 for turning the rod.

The coloil wheel 6 is divided into a plurality of sectors 75 of different colors. The wheel is secured on a shaft 76 which is journaled in bearings 77 and 7 8 on the upper ends of members 23 and 24E respectively of frame 21. A worm wheel 79 is secured on the color wheel shaft 76 in mesh with a worm 80 on the upper end of a vertical shaft 8l journaled in hearings 82 and S3 on the frame member 24. A worm wheel 84 is secured on the lower end of shaft 8l in mesh with a worm 85 on the shaft S6 of motor 8.

The inlet 87 of the blower 7 extends from the atmosphere through the bottom wall of the lower section of the casing l and the upper section 10 of the casing is constructed with a ventilator 8S in the top thereof so that air drawn into the casing through said inlet after circulating through the casing may escape through saidV ventilator.

The operation of my invention is as follows: rlhe slide holder 2 reflector 3, light 4, and lens 5 being properly adjusted, a slide 90 of figured or lettered glass is introduced from one side of the casing through an opening 45 into the slide holder 2. The light 4 being lighted and the motor 8 put in operation, air is circulated by the blower 7 through the cas ing and the color wheel 6 rotated by the motor through the medium of motor shaft 86, worm 85, worm gear shaft 8l, worm 80, worm gear 79 and shaft 76. The design of the slide 9() is projected by the light of light 4., reflected by reflector' 3 through the openings 2a and 2?) of the slide holder 2 through the magnifying lens 5, color wheel 6 and lens 20 and the rotation of the wheel 6 bringing the different colored sectors 75 thereof successively across the projected light produces a novel varigated spotlight projected through the lens 20.

le claim as our invention A spotlight projecting machine comprising a front lense, a condenser lense spaced rearwardly of said front lense, a translucent color element positioned between said lens, said element having differently colored areas progressively movable across the field of vision, an image-forming translucent member spaced rearwardly of said condensing lense, and a source of light located rearwardly of said member to project light therethrough.

In testimony whereof we afiix our signatures.

ANTON J. OBERG. ROBERT R. STOEFEN.

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