US2076240A - Spot and floodlight projector apparatus - Google Patents

Description

April 6, 1937. ,1 LEVY 1 2,076,240 sPo'ir AND FLOODL IGHT PROJECTOR APPARATUS Filed 001:. 25; 1934 2 Sheets-Sheet l @6.1. 1 14 Z4 12 J '70? I I wmppll.

Q ATTORNEY April 6, 1937. V LEVY 2,076,240

" SPOT ANDFJVLYJOODLIGHT PROJCTOR APPARATUS Filed Oct. 25, 1934. 2 Sheets-Sheet 2 A'ITORNEY Patented Apr. 6 1937 PATENT; OFFICE SPOT AND FLOODLIGHT PROJECTOR I APPARATUS Joseph Levy,

tury Lighting Equipment, Inc.,

New York, N. Yb, assignor to Gen- New York, N. 1.,

a corporation of New York Application October 25, 1934,: Serial No. 749,877

3 Claims.

The invention relates to light projectors and more particularly is directed to spot and floodlight apparatus such as used for indoor or outdoor illumination in stage, display and photography lighting, and for other like purposes requiring either long or short range adjustments.

Among the objects of the invention is to generally improve spot and flood-light projecting apparatus of the character described whereby the constru tion thereof comprising few and simple parts, which shall be readily assembled, which shall be easily manipulated and'adjusted, which shall be relatively cheap to manufacture, and

which apparatus shall be practical and eflicient to a high degree in use. I

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the constructions hereinafter described and of which the scope of application will be indicated in the following claims.

In the accompanying drawings, in which is shown various possible illustrative embodiments of this invention:

Fig. l is 'a side elevational view of a spot and flood-light apparatus embodying the invention,

partly broken away to show the interior construction; a

Figs. 2 and *3 are rear and front end views, respectively, of the improved apparatus shown. in Fig. 1;

Figs. 4, 5, 6 and 7 are cross sectional views taken on lines 4-4, 5-5, 6-6 and 1-1, respectively, in Fig. 1;

Fig. 8 is a cross sectional view showing a modifled form of adjustable framing shutter construction; and

Fig. 9 is a sectional viewtaken on lines 9- -il in Fig. 8.

Referring in detail to the drawings, I0 indicates generally an incandescent-lamp type, spot and flood light apparatus embodying the invention, constructed and arranged for long or short range work and adapted'for service requirements in outdoor and indoor illumination. The apparatus I0 is seen to comprise a tubular body or housing hood II, preferably formed of sheet metal, having an ellipsoidal reflector I2 fitted into a rear por tion thereof. The curved mid-section of said re flector I 2 maybe cut out, at Ila, to permit the free swingingof the bulb endof an incandescent lamp I3 with a breach-cover I4, the latter being able means, such as hinged supports I5, said cover I4 being retained in seated position by a finger screw fastener I6, as shown in Fig. 2.

The breach-cover I4 has an opening Ila wherethrough the incandescent lamp I3 extends. Said opening Ila. has formed to extend outwardly thereof compartmentextension II for communicating the interior of the hood II with the reflector I2. Said compartment extension I! has secured therein an electric light socket or receptacle I8. The latter connects the lamp I3 in cirsuit with the flexible leads I9 which in turn through a suitable switch 20 connects with conductor cable 2|. The cable preferably terminates with a suitable attachment plug (not shown) for tapping an electric power supply in the well understood manner. Said switch 20 may be enclosed in a fitting or box 22v carried on the under side of the hood II, said box being made to receive the ends of leads I9 extending from the hood between the cover It and reflector I2 as is shown in Fig. 1.

The compartment extension I! may be provided 'with a cap Ila. which gives access to the receptacle I8, a lower portion wall of said compartment member II being extended at Ill) and spaced from the cover It to provide an inlet. 23 for the passage of cooling air therethrough, around the base of .the bulb I3, through'the hood I I, behind the reflector I2, and thence out through louvre or outlet 24.

The upper and lower wall portions of the hood I I in front of the reflector I2 have top and bottom vent holes Na and Ilb, respectively, which per-' init passage of cooling air to circulate about the bulb end of the lamp I3 and through the hood in front of said reflector I2. To make these perforated wall portions of the hood light-proof, interposing baffles or screen members 25 are pro- -vided inside the hood spaced from said holes Ila three sets of shutters may form a unit structure which is secured to said flange able means such as bolts 30.

The horizontal or cross framing shutters 21' .10 against the track piece 3| by one or more sets of links 32. To provide movement of the slides 21a in unison to and from each other across the center of the light tube 26, links 33 and 34 connecting with a bar 35 are provided. Said bar 35 is piv- 15 oted at 36 and connects with a lever handle 31 which extends outside the front end of the hood II as shown in Fig. 3, so that when said handle 31 is moved in the directions of the arrows, the slides 21a are correspondingly moved to and away 20 from each other. Rail member 3|, links as and 34, bar 35, and pivot 36 together with the slides 21a are supported on the rear side of a disc plate 10 having a square opening 10a, said plate being rigidly mounted in position by the bolts 30, as 25 shown in Fig. 5.

The vertical shutters '28 which are situated between the horizontal shutters 21 and the iris shutter 29 are carried on the front side of disc 10 and may comprise slides 28a similar in all respects to slides 21:: but positioned to operate up and down instead of across, as is clearly shown in Figs. and 6, said slides 280. being adapted to ride on track piece 36 and having sets of 35 guiding links 39 similar to the links 32; These slides 260. are connected for cooperative-movements by links 40 and 4| which are interconnected by a bar 42,.said bar being pivoted at 43 and swingably controlled through a lever handle" 44 so that when the latter is moved in the directions of the 'arrows shown in Fig. 3, the slides 28a are correspondingly moved up and down, that is, to and away fromleach other,'as is clear from Fig. 6. The iris shutter 29 may be of any well-known construction, but as here shown comprises a plurality of blades 29a,'each pivoted at 29b on a plate disc a. Each of the blades 29a carry'fix pins 29c which engage in slots 29f'in an annular disc 290, said disc 290 being mountedfor rotation between spaced bearing roller 29d, as shown in Fig. 7. As shown in Figs. l and'7, the bearing rollers 29d are supported on the outturned flange 26b of the tube end 26a. j The iris shutteris controlled through links 46 and 41, one end of the link. being pivoted to the'disc 290 as at 46a, the 5 other end of said link 46 connecting with the free end 410 of the link 41. The end 411) of said link 41, opposite said free end 41a, is pivoted as at 43, and is rocked through movement of the lever handle 49 situated on the front end of the hood II to .open and close the iris shutter 29. On moving said handle 49 in the directions'of the arrows shown in Fig. 3, through the links 46 and 41, the V blades29a swing in unison with the turning of the disc 29c causing the 'iris to open and close.

The light tube 26 carries at its front end a lens holder 60 which has fitted therein a, pair of lenses 6| and 52, lens 5| being fitted against an inwardly extending flange 50a on the holder 50. and lens 62 being separated from said lens 5| by a spacer collar 5:. The entire lens assembly is held in place by a spring snap ring 54 which fits between thenlensjl and a suitable stop such as spaced protuberance? 65. For adjusting the lenses 5| and 52 to focus the projected light, said lens holder 50 is made to telescope in the tube 26 and 26b by any suithood, shutters, light tube and lenses.

, rection and may be kept have the projecting light follow any moving oba suitable engagement means for limiting the movement of the holder 59 relative to said tube 26 is provided as for example spiral slots 26a in tube 26 through which the pins 56 from the holder 50 extend. For making the lens adjustment, a suitable handle 51 is provided on an outwardly extending rim 'flange 50b. Thus by moving the handle 51 in the directions of the arrows shown in Fig. '3. the lens holder is telescopically moved in and out of the tube 26 and the lens is .ad' justed with relation tothe source of light in the hood I For adjusting the power range, the light tube 26 with the lens holder 50 maybe moved in the sleeve ||c so that said shutters, holder and lenses are moved as a unit with relation to the source of light. To facilitate this movement, lever handle 58 is provided, the latter being pivoted at 59 on the hood end 26b. Said adjustment may be locked by any suitable means such as -wing screw and nut connection 60.

A suitable tilting and swivelling mounting may be provided as part of the apparatus I0; said mounting comprising a U-shaped yoke 6| which terminates in spaced pivots 62 forminga trunnion with extensions 63 from the housing H, the lower mid-portion of the yoke 6| being provided with a swivel support 64, as is clearly shown in Fig. 2.

The operation of the improved apparatus will now be apparent. After constructing the parts of the apparatus In and assembling same as described above and shown in Fig. 1 of the drawings. cable 2| is connected to a suitable power source (not shown) in thewell understood manner.

The lamp l3 will'be lit by operating the switch 29 to close the circuit and light beams from the lamp filament |3a and from the inner surface of the reflector |2 will be projected through the The heat around the base of the lamp |3 will be carried off 'by air passing through the passage'23 around the base of said lamp'and out'through the louvers 24. Heat generated at the bulb of said lamp l3 and within the reflector l2 will be carried off by the air entering the lower holes ||b, circulating through the hood and around said bulb and pass out through the upper holes la. The baflies 26 serve to shield any leakage of light through said openings la and I I b. Two separate and relatively short air cooling paths are thus provided whereby the temperature of the apparatus is kept at a minimum.

Should'the lamp l3 burn out or require inspection, the breach-cover 4 may be swung open on the hinge supports l5 carryingthe lamp |3 there with, the finger screw fastener |6 being first loosened to unlock said cover from the hood. The opening I 2a in the reflector is made sufilciently large to permit the swinging of the billb of lamp I 3 therethrough and the lamp may then be readily inspected, removed or replaced.

If the receptacle l8 in compartment extension |1 should require inspection or replacement, the-cap |1a may be removed for such purposes.

The apparatus ||l maybe tilted or swivelled, by trunnioning the hood H on the yoke 6| or swivelling the latter, on support. 64, or may be moved by simultaneously combining both the tilting and swivellingmovements. Thus the apparatus It may be positioned' for projecting light in any diinconstant motion to ject.

With the shutters 21, 28 and 29-.open wide, by operating handles 61 and 58, the projected light beams have the power range adjusted and may be focused to give spot or flood lighting. By operating the iris shutter control handle 49, the size of the projected spot may be regulatedthrough opening and closing the iris shutter. Likewise by operating the horizontal framing shutter handle 3i and the-vertical framing shutter handle 44, the shape of the light beam may be selectively adjusted either horizontally or vertically. In each of these cases, the pairs of slides 21a and 28a will move to and/or away from each other.

In Figs. 8 and 9, there is shown a modified'form of horizontal or cross framing shutters H1 and vertical or up and down framing shutters I28 which are adapted to be set in angular relation. Here each of the slides HM and i280: of said shutters i2? and 8%, respectively, are individually controlled by oppositely disposed lever handles iii and ltd, respectively. Said slides iZia; and iZiia are mounted for in and out movement by means of the threaded connection of the lever screw EM and each pair of cooperating slides may 7 be tilted out of alignment with respect to the other by swinging the handles Isl and I36 on the pivotal mounting ltd as illustrated by the full and dotted line positions of handle E3! in Fig. 8. With this construction, the beam as it passes through the shutters may be varied in size and may be given various regular and irregular shapes.

Lil

Shields sets are provided about each of the hanthe light from pass-" dies iiil and I38 to shield ing out of the slots lilo through which the said levers extend, as shown in Fig. 8. If desired, the shutters I21 and in may be combined with an iris shutter such as described above and as shown in Fig. l.

It is to be understood that the one or all of these shutters may be omitted from the apparatus W in carrying out some of the objects of the invention, said shutters serving to facilitate shaping the projected beam for various requirements in stage display and photographic lighting.

It will thus be seen that there is provided a device in which the several objects of this, invention are achieved and which is adapted to meet the conditions of practical use.

As various other possible embodiments might be made of the above invention. and as various changes might be made in the embodiments set forth, it is to be understood that all matters herein set forth as shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention I'claini as new and desire to secure by Letters Patent:

1. In a spot and flood-light projector apparatus, a hood fitted with a reflector, a breach-cover end-closure carrying a lamp swingably mounted on a rear end of said hood for moving the lamp into and out of an eifective position with respect to the reflector, said lamp being mounted in a receptacle housed in a compartment formed -in said end-closure, said end-closure and compartment having a passage to serve as an air inlet, and said hood having spaced outlets located to permit the passage of air along the front and rear of said reflector.

2. A spot and flood-light projector apparatus including-a hood, 2. tubeextending into and from an end of said hood, and a unitary organization mounted on the inner end of the tube and comprising an apertured plate, a set of vertically movable framing shutters mounted on one side of said plate, a set of horizontally movable framing shutters mounted on the other side of said plate in cooperative relation to said vertically movable shutters, and control means extending outwardly from said tube and forwardly of said hood for moving each of said set of framing shutters.

3. The projector apparatus defined in claim 2 in which said means permits at least one of said shutters to be selectively positioned in either alignment or angular position with respect to another of said shutters.

JOSEPH LEVY.

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