US3321615A - Electrical lighting apparatus - Google Patents

Description

May 23, 1967 H. HILZEN ELECTRICAL LIGHTING APPARATUS Filed Feb. 23, 1965 INVENTOR, Hy Hilzen,

ATTORNEY.

United States Patent 3,321,615 ELECTRICAL LIGHTING APPARATUS Hy Hilzen, 1 Shore View Drive, Yonkers, N.Y. 10710 Filed Feb. 23, 1965, Ser. No. 434,543 4 Claims. (Cl. 240-3) ABSTRACT OF THE DISCLOSURE I A tubular casing having a reduced section terminating in a screw shell means to be received in a socket outlet. A reflector of dished form closes the larger end of the casing and extends therein whereby the mouth of said reflector is exposed. Diametrically opposite tabs are struck from said reflector and extend exterior thereof in the direction away from the mouth of said reflector. Two dielectric members extend through said openings respectively and are mounted on said tabs whereby a portion of each of said members is within the reflector and a portion is exterior thereof. Each of said interior portions present a contact terminal releasably engaging the end terminals of an elongated electric lamp. Said contact terminals are positioned on resilient conductive elements extending through said openings along said dielectric members respectively; said resilient elements are secured on said exterior portion of said dielectric members respectively. Conductors within the casing connect said contact terminals to the terminals of said screw shell means respectively.

The present invention relates to electrical lighting apparatus employing incandescent halogen quartz lamps and more particularly to flood lamp and spotlight constructions for use in public buildings, auditoriums, display areas, lawns, arenas, show rooms, lobbies, photography and television studies, art galleries and the like.

An object of this invention is to provide a novel and improved adaptor construction, mounting a quartz lamp and including a screw shell to fit into a screw socket, all associated on a metal casing which is specially designed to dissipate heat.

A further object thereof is to provide a novel and improved construction wherein the quartz lamp mounting means and a reflector for said lamp are associated as a unitary structure, fitting as a cap on the mouth of said casing which terminates in a screw shell; said unitary structure being useable per se in existing spot light devices, and further adaptable to have various attachments releasably mounted thereon.

A further object thereof is to provide novel and improved illuminating apparatus of the character described, which is simple in construction, reasonable in cost and eflicient in carrying out the purposes for which it is designed.

Other objects and advantages will become apparent as this disclosure proceeds.

For one practice of this invention, the adaptor comprises a tubular casing whose forward portion is of a diameter larger than the length of the straight incandescent electric lamp, usually called a quartz lamp, with sufficient space needed for the lamps end mounts. The rearward portion of said tubular casing is of reduced diameter and terminates in a screw shell for threaded engagement in a screw-in socket to get a power connection to the lam terminals. The wall connecting said tubular portions is bent to have an outer annular channel of appreciable depth and width, surrounding the inner end of said reduced portion of the casing. This channel wall has a multiplicity of spaced radial slit openings.

A ferrule fits over the open end of the casing and is released secured thereto. The opening of the ferrule 3,321,615 Patented May 23, 1967 is closed by an inwardly dished reflector having an outward flange from its mouth rim; said flange being within said ferrule and secured thereto. A pair of diametrically opposite tabs, struck from the reflector, are bent to lie outside the reflector and extend towards the reduced end of the casing, thereby leaving an opening at each of them in the reflector wall, extending from mouth rim to about half the depth of the reflector bowl. These tabs serve as brackets on which the lamp mounts are fixed respectively and extend into the reflector through said openings respectively, each mount presenting a contact terminal to engage a lamp terminal respectively. Various attachments, as for example a vizor, is releasably mountable on the outer surface of said ferrule, to extend forwardly of the casing. In another instance shown, a ring having a laterally extending slide is carried on the ferrule and thereby adapts the adaptor for association with the track means provided in a spot light casing.

In the accompanying drawing forming part of this specification, similar characters of reference indicate corresponding parts in all the views.

FIG. 1 is a perspective View showing a lighting device embodying the teachings of this invention.

FIG. 2 is a central longitudinal section of FIG. 1.

FIG. 3 is a sectional view taken at line 33 in FIG. 2.

FIG. 4 is a perspective view of the reflector member.

FIG. 5 is a fragmentary perspective view showing a vizor attachment on the item shown in FIG. 1.

FIG. 6 is an exploded partly fragmentary view of the quartz lamp and its mounting means.

FIG. 7 is a perspective view of a spot light, employing a modified construction.

FIGS. 2 and 6 are enlarged views.

In the drawing, the numeral 15 designates generally a dished reflector for a straight electrical incandescent iodine quartz lamp indicated generally by the numeral 16, whose end socket terminals 17, 17 receive in them the contact buttons 18, 18' respectively, which are presented at the end of cantilever leaf springs 1?, 19, mounted on the dielectric mounts 20, 20' respectively. The numerals 21, 21' denote insulative strips covering the exposed surfaces of said leaf springs. The reflector 15, has struck therefrom, the diametrically opposite tabs 22, 22, which are of material commencing from the mouth rim of said reflector. These tabs are bent away from the mouth rim, thereby providing the openings 23, 23 in the reflector body. Said tabs are respectively in face to face contact with the legs of a stiif U-shaped frame element 24. The lamp mount 20 is secured to the associated tab 22 and frame leg 25, by means of a screw 26. The lamp mount 20' is secured to the associated tab 22' and frame leg 25. Said lamp mounts are positioned through the openings 23, 23' respectively, into the reflector 15, with their contact buttons 18, 18' opposite one another.

At the mouth rim of said reflector 15, there is an outward flange 27 which is set into and secured to a ferrule member 28. This ferrule is a releasable cap at the forward end of the enlarged section 29 of a tubular shell denoted generally by the numeral 30, Whose reduced section 31 terminates a screw shell 32 which is insulated from the shell 30 and has a central contact terminal 33, which is insulated from both shells 30 and 32. A conductor 33 connects the blade spring 19 to the screw shell 32, and another conductor 34 connects the blade spring 19' to the contact terminal 33. It is evident that this construction is of an adaptor to fit into an electrical screwin socket (not shown) to power the lamp 16.

The wall 35 which connects the sections 29 and 31, is bent to form a relatively deep and wide annular channel 36, surrounding the reduced tubular section 31, whose outer surface, radially considered is concave and whose inner surface is convex. The wall of the channel has a plurality of narrow, spaced radial slits 37.

It is important to note that this construction having the slitted surface 38 which is inwardly convex, efficiently dissipates the heated air mass within the casing 3!), keep ing it from becoming unduly overheated. If this inward surface were concave, as was the practice in casing constructions generally, only heated air currents traveling normal to said surface would escape, while those in other directions would stay cached within the casing. By having said surface 38 convex, heated air currents travelling in all directions, pass out of the casing, because they must pass through the convex Wall as soon as they come to it, because to remain in the casing they need a dome which is only offered if said inner wall surface 38 is concave. Further, it is the narrowness of the slits 37 that aids the witdrawal of heated air from within the casing, through them, because as some heated air pass out of them, such departing air causes a sort of suction action and draws more heated air with it from within the casing. This suction action diminishes if the slits are made wider. So for best cooling action, the slits 37 are made comparatively narrow. If the slits were along a circle concentric with the shells axis, the suction action would not occur. The slits must be along lines which are non-concentric with shell axis, for said suction effect to happen.

Various attachments as for instance, a snoot, a twoleaf barn door, a color filter holder, and as specifically shown, a vizor 39, are well known for association with spot lights and flood lamps, and same are mountable on the ferrule cap 28 in the embodiment shown in FIG. 5. For use in a spotlight casing structure 40, the attachment onto the ferrule cap 28 may be a ring 41 which has a laterally extending slide 42 in engagement with a track 43, and equipped with an exterior handle 44 for manipulation in manner well known. When the light mount is used in this set up, the screw shell 32 is omitted, for the leads 33, 34 to the lamp 16 are directly connected to the cord or cable 45 which brings current to the device.

The unit comprising the reflector construction and the lamp mounts 20, is useful for making various fixtures in the illumination field where a plurality of such units are associated by mounting the reflectors at their flanges to common framework, or by including a ferrule as 28 on each unit and then mounting such ferrules on common framework, which embodiments are believed readily understandable by those versed in the art without further illustration herein, and an example of Which is shown in my patent application filed simultaneously herewith, for a bounce or indirect lighting apparatus.

This invention is capable of numerous forms and various applications without departing from the essential features herein disclosed. It is therefore intended and desired that the embodiments herein shall be deemed merely illustrative and not restrictive and that the patent shall cover all patentable novelty herein set forth; reference being had to the following claims rather than to the specific description and showings herein to indicate the scope of this invention.

I claim:

1. In an electrical lighting apparatus of the character described, a dished reflector having diametrically-opposite tabs struck therefrom, extending exterior thereof in the direction away from the mouth thereof whereby opposite openings are formed therein, an elongated electric lamp having aligned contact terminals exposed at its respective ends, two dielectric members extending through said openings respectively and mounted on said tabs respectively whereby a portion of each of said members is within said dished reflector and a portion is exterior thereof; each of said interior portions presenting a contact terminal releasably engaging an end terminal of said lamp and positioned on resilient conductive elements extending through said openings along said dielectric members respectively; said resilient elements being secured to said exterior portions of said dielectric members respectively, a sheet metal tubular casing having a reduced section terminating in a screw shell having a contact element insualted therefrom at its remote end, to be received in a socket outlet, and conductors within said casing connecting said screw shell and its contact element to said resilient elements respectively; said reflector being mounted in and extending into the larger section of said tubular casing and closing the larger end thereof whereby the mouth of said reflector is exposed.

2. An electrical lighting apparatus as defined in claim 1, wherein the sections of said tubular casing are connected by a wall; said wall being bent whereby an exterior annular channel is formed therein surrounding the inner end portion of said reduced section; said channel facing away from the larger section of said casing and having a plurality of slits along lines non-concentric with the axis of the casing.

3. An electrical lighting apparatu as defined in claim 2, wherein the wall of said channel interior of the casing is convex.

4. An electrical lighting apparatus as defined in claim 2, including a ferrule cap releasably mounted on the month end of the larger section of said casing; said reflector having an outward flange extending from its mouth rim; said flange being within said ferrule and secured thereto.

References Cited by the Examiner FOREIGN PATENTS 3/1909 Great Britain. 9/1936 Great Britain.

Claims (1)

1. IN AN ELECTRICAL LIGHTING APPARATUS OF THE CHARACTER DESCRIBED, A DISHED REFLECTOR HAVING DIAMETERICALLY-OPPOSITE TABS STRUCK THEREFROM, EXTENDING EXTERIOR THEREOF IN THE DIRECTION AWAY FROM THE MOUTH THEREOF WHEREBY OPPOSITE OPENINGS ARE FORMED THEREIN, AN ELONGATED ELECTRIC LAMP HAVING ALIGNED CONTACT TERMINALS EXPOSED AT ITS RESPECTIVE ENDS, TWO DIELECTRIC MEMBERS EXTENDING THROUGH SAID OPENINGS RESPECTIVELY AND MOUNTED ON SAID TABS RESPECTIVELY WHEREBY A PORTION OF EACH OF SAID MEMBERS IS WITHIN SAID DISHED REFLECTOR AND A PORTION IS EXTERIOR THEREOF; EACH OF SAID INTERIOR PORTIONS PRESENTING A CONTACT TERMINAL RELEASABLY ENGAGING AN END TERMINAL OF SAID LAMP AND POSITIONED ON RESILIENT CONDUCTIVE ELEMENTS EXTENDING THROUGH SAID OPENINGS ALONG SAID DIELECTRIC MEMBERS RESPECTIVELY; SAID RESILIENT ELEMENTS BEING SECURED TO SAID EXTERIOR PORTIONS OF SAID DIELECTRIC MEMBERS RESPECTIVELY, A SHEET METAL TUBULAR CASING HAVING A REDUCED SECTION TERMINATING IN A SCREW SHELL HAVING A CONTACT ELEMENT INSUALTED THEREFROM AT ITS REMOTE END TO BE RECEIVED IN A SOCKET OUTLET, AND CONDUCTORS WITHIN SAID CASING CONNECTING SAID SCREW SHELL AND ITS CONTACT ELEMENT TO SAID RESILIENT ELEMENTS RESPECTIVELY; SAID REFLECTOR BEING MOUNTED IN AND EXTENDING INTO THE LARGER SECTION OF SAID TUBULAR CASING AND CLOSING THE LARGER END THEREOF WHEREBY THE MOUTH OF SAID REFLECTOR IS EXPOSED.

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