US2799773A

US2799773A - Reflector

Info

Publication number: US2799773A
Application number: US333519A
Authority: US
Inventors: Schwartz Nathan Rodney
Original assignee: NARAS RES Inc
Current assignee: NARAS RES Inc; NARAS RESEARCH Inc
Priority date: 1953-01-27
Filing date: 1953-01-27
Publication date: 1957-07-16
Anticipated expiration: 1974-07-16

Description

July 16, 1957 N. R. SCHWARTZ REFLECTOR Filed Jan. 27, 1953 INVENTOR. NATHAN RODNEY .SCHWARTZ AT OFNE K United States Patent REFLECTOR Nathan Rodney Schwartz, Brooklyn, N. Y., assignor to Naras Research Inc., New York, N. Y., a corporation of New York Application January 27,1953, Serial N 0. 333,519

4 Claims. ((31. 240-47 hot when the light is turned on for any length of time,

and his hands or face may come inadvertently in contact with the reflector. Painful burns can and often do result from such inadvertent contact with the reflector.

With this in mind, it is the principal object of the present invention to provide a metallic reflector which will remain cool to the touch when used in connection with a 100 watt bulb.

A further feature of the present invention resides in the provision of a reflector of this character, which will be comfortably and harmlessly warm when used in association with a 150 watt bulb, even after such a bulb has been in continuous use for many hours.

Still another purpose of the present invention resides in the provision of a metallic reflector of this character, comprising three concentric elements of different diameters, placed within and spaced from each other and positioned around a source of light.

And yet another purpose of the present invention resides in the provision of a reflector of this character having three concentric elements placed within each other and spaced from each other, forming a plurality of chambers having appropriate openings therein, through which hot air rising from a source of light may escape, and of means for retaining the concentric elements in spaced relationship to each other.

And a still further object of the present invention resides in the provision of. a reflector of this character having openings therein for the escape of hot air, the openings being so arranged, that light cannot escape therethrough.

These and other meritorious aims and advantages, which will become more fully apparent as the description hereof proceeds, are attained by the novel combination, construction and arrangement of parts, hereinafter described, and illustrated in the accompanying drawing, forming a material component of this disclosure, and in which:

Figure 1 is a side elevational view of a reflector made in accordance with the present invention, the illustration being partly in section to show the relative position of the several concentric elements.

Figure 2 is a top plan view of the reflector illustrated in Figure 1; and

Figure 3 is a bottom plan view of the reflector shown in Figure 1.

Referring in greater detail to the drawing, the numeral Patented July 16, 1957 10 designates in general a reflector of the present invention, which comprises a hollow substantially conical outer shell 11, a hollow substantially tubular intermediate shell 12 and a hollow substantially tubular inner shell 13. The edge of the relatively narrower end of shell 11 is turned inwardly as at 25, forming a flange to which may be secured by welding or otherwise a tubular socket receptacle 21, spaced from outer shell 11 and having a plurality of air openings 22 at spaced intervals about its wall. The lower edge of socket receptacle 21 is turned inwardly, as at 35 to form a ring, which is provided with a pair of downwardly extending opposed protuberances 26. Near its narrow upper end, shell 11 is provided with circumferentially arranged, spaced apart elongated slots or flutes 17, the purpose of which will hereinafter become more fully apparent. The lower edge of shell 11 may be turned outwardly upon itself as at 14.

Shell 12 is cylindrical in form and is of smaller diameter and lesser height than shell 11. At one end, shell 12 is turned inwardly to form an offset 27, from which extends centrally thereof a narrow neck 29 terminating in a constricted roof portion 28. Roof 28 is provided centrally thereof with an opening 30. Roof 28 is further formed with an opening 31 at one side of central opening 30 and with an opening 32 at the other side of central opening 30. Shell 12, near the upper end thereof, is provided with a plurality of spaced-apart, circumferentially disposed inreaching depressions 18, each tennimating in a narrow slit. Near its lower end, shell 12 may be provided with a plurality of spaced-apart openings, for the passage of one end of a spacer 19 therethrough, and the lower edge of the shell may be turned outwardly upon itself as at 15.

Inner shell or concentric member 13 is tubular in form and is of smaller diameter and lesser height than shell 12.

Near its lower end, shell 13 may be provided with a plurality of openings for the passage of the other end 20 of spacer 19 therethrough. The lower edge of shell 13 may be turned upwardly upon itself, as at 16.

Shells

11, 12 and 13 are spaced equi-distantly from each other.

The reflector is assembled and used in the following manner:

Intermediate shell 12 is entered into the outer shell 11 in such manner that the upper edge of roof 28 of shell 12 will abut the ring 35 of socket receptacle 21. When properly positioned, protuberances 26 depending downwardly from the underside of ring 35 will enter

openings

31 and 32 respectively thus locking the two concentric members together and preventing shell 12 from turning in shell 11. The innermost shell 13, is then placed inside intermediate shell 12 until the openings near the lower end of shell 12 come into alignment with corresponding openings in shell 13, whereupon spacers 19 may be entered therebetween to join them spacedly. The inside of roof 28 at the upper end of shell 12 serves as a receptacle for a conventional porcelain socket by forming a chamber 23. A source of light such as a screw type incandescent light bulb (not shown) may then be screwed into the socket in chamber 23 in an obvious and conventional manner.

The relative diameters of the several shells and their relative distances from each other are such, that a continuous air chamber is formed between shell 13 and shell 12, and between shell 12 and shell 11. Hot air rising from the source of light will rise in shell 13, enter the air chamber between shell 13 and shell 12, leave that air chamber through openings 18, enter the air chamber between

shells

11 and 12 and leave that air chamber through openings 17. Inasmuch as there are no openings in shell 11 directly opposite the openings 18 in shell 12, light rays will not be visible outside the reflector because of such openings.

Thus there has been shown a reflector which, due to its several air chambers, will have an outer shell which remains cool to the touch when used in connection with a 100 watt bulb and only slightly warm when used in connection with a 150 watt bulb. ,The present disclosure represents the preferred embodiment of the present invention and is intended to be illustrative and descriptive only of such embodiment and is not to be considered to be restrictive or limitative to the exact details shown, applicant reserving the right to make such changes in the construction of the reflector as might come within the scope of the appended claims without thereby departing either from the spirit or the scope of the appended claims.

Having thus described the invention, what is claimed as new and desired to secure by Letters Patent, is:

l. A reflector adapted to be spaced about an incandescent light source, said reflector comprising in combination three concentric shells, respectively an inner tubular shell, an intermediate hollow tubular shell of greater height and diameter than said inner shell, said intermediate shell having a constricted neck portion at one of its ends, said constricted neck portion terminating in a roof portion of lesser diameter than said neck portion, an outer shell of greater diameter and height than said intermediate shell, said outer shell being tubular in form and having one of its ends narrower than the other of its ends, a socket receptacle in said outer shell, said socket receptacle depending from the narrower end of said outer shell downwardly, a ring at the lower end of said socket receptacle, means providing a pair of spaced-apart openings in said roof portion of said intermediate shell, means depending from said ring adapted to enter said openings retaining said intermediate shell in spaced engagement in said outer shell, and a plurality of spacers retaining said inner shell in spaced engagement in said intermediate shell.

2. A reflector as set forth in claim 1, wherein said concentric shells are equi-distantly spaced from each other.

3. A reflector as set forth in claim 2, wherein the ends of said concentric shells from which the light rays of the light source emanate, are open.

4. In a reflector adapted to be spaced about an incandescent light source, the combination of three concentric shells, respectively an inner hollow tubular shell, a hollow tubular intermediate shell having a constricted neck at one of its ends, said neck terminating in a narrow roof portion projecting from said neck, a hollow outer tubular shell of greater height and diameter than said intermediate shell, one end of said outer shell having a narrower diameter than the other end, a socket receptacle in said outer shell depending from said narrower end, said socket receptacle terminating in a ring; with means retaining said shells in spaced relationship with each other, said retaining means comprising a. pair of depending lugs on said ring, means providing a pair of spaced-apart openings in said roof portion adapted to receive said lugs 'spacedly retaining said intermediate shell in said outer shell, and means providing openings in said inner shell and said intermediate shell for the passage of spacers therethrough spacedly retaining said inner shell in said intermediate shell.

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