US2715675A

US2715675A - Portable lamp structure

Info

Publication number: US2715675A
Application number: US242335A
Authority: US
Inventors: Michel E Macksoud
Original assignee: Individual
Current assignee: Individual
Priority date: 1951-08-17
Filing date: 1951-08-17
Publication date: 1955-08-16
Anticipated expiration: 1972-08-16

Description

g 16, 1955 M. E. MACKSCUD 2,715,675

PORTABLE LAMP STRUCTURE Filed Aug. 17, 1951 5 Sheets-Sheet 1 IN V EN TOR. 212424; a $1M W. MWWMM! g- 1955 M. E. MACKSOUD 2,715,675

PORTABLE LAMP STRUCTURE Filed Aug. 17, 1951 5 Sheets-Sheet 2 IN VEN TOR. uild 8. M

KW! MM 41% Aug. 16, 1955 M. E. MACKSOUD 2,715,675

PORTABLE LAMP STRUCTURE Filed Aug. 17, 1951 5 Sheets-Sheet 5 INVENTOR. 7110148. 7714444 XWW) Aug. 16, 1955 M. E. MACKSOUD 2,715,575

PORTABLE LAMP STRUCTURE 5 Sheets-Sheet 4 Filed Aug. 17, 1951 INV NTOR. 'muws. mufwl l (many. mmwm Aug. 16, 1955 M. E MACKSOUD 2,715,675

PORTABLE LAMP STRUCTURE Filed Aug. 17,1951 5 Sheets-Sheet 5 Ozz 7 d'iiy. 10

United States Patent Ofiice 2,715,675 Patented Aug. 16, 1955 PORTABLE LAMP STRUCTURE Michel E. Macksond, Bronxville, N. Y.

Application August 17, 1951, Serial No. 242,335

14 Claims. (Cl. 240-4) The present invention relates to a portable lamp structure suitable for use as a sun health lamp, or for other purposes, and more particularly to an improved combined portable carrying case and reflector structure adapted to contain plug-in lamp supporting elements and plugin ballast supporting elements in a complete, unitary structure of pocket size.

I am aware that portable pocket size sun lamp structures are generally old. However, the portable pocket size lamp structures of the prior art with which I am familiar have a number of disadvantages which, in my opinion, limit their usefulness and cause them to be somewhat impracticable from an economic standpoint.

It is therefore a principal object of my invention to provide a complete, portable, pocket size combined carrying case, lamp structure and reflector, which, when opened for use, automatically positions the lamp and reflectors in the correct relation for the most efficient production and direction of radiant energy.

Another object of my invention is to provide an improved form of portable lamp carrying case and reflector structure which may be opened from a closed position to an open position whereby the inner wall surfaces of the case function as reflective surfaces, the carrying case being provided with a spring supporting clip, which, when positioned to support the case from an external projection, also functions to accurately position the angular relationship of the reflective surfaces and the radiation source.

Another important object of my invention is to provide an improved portable lamp carrying case and reof glass having various desired radiation filtering properties to enhance the production of desired radiation frequencies from the lamp structure.

It is therefore another very important object of my invent on to provide an improved form of removable radiation source adapted to be plugged into the novel combined portable carrying case and reflector structure, the radiation source comprising an outer light filtering envelope having external prong electrical connectors for flector structure having supporting elements for a lamp and lamp ballast arranged for plug-in replacement of the lamp or lamp ballast, together with an arrangement for the plug-in connection of a line cord to the supporting elements in such manner that the entire supporting elements, together with the electrical connections for the lamp and lamp ballast, may be conveniently and compactly formed in a single socket element of simple construction and low cost.

Yet another object of my invention is to provide an improved form of plug-in ballast resistor for use with the combined portable lamp carrying case and reflector of my invention.

The portable lamp carrying case and combined reflector of the present invention may be used with various types of plug-in radiant energy generators or lamp units which for a few examples may be mentioned as black light lamps, germicidal lamps, medical ultra-violet lamps, electronic repeater flash lamps, photo-flood lamps, and photo-flash lamps. When using the portable carrying case and reflector structure of this invention with a source plug-in connection to the carrying case supporting elements and containing an inner mercury vapor arc tube together with a thermostatic starting switch arranged within the light filtering envelope in a novel and efl icient manner.

Still another object of my invention is to provide an improved and simplified plug-in socket or supporting structure having in a single, unitary form, the electrical coirnections and the plug-in receptacles for a lamp source of radiant energy, plug-in receptacles for a plug-in form of lamp ballast resistance, and plug-in connections for a detachable line cord; the entire supporting structure adapted to be carried within the combined portable lamp carrying case and reflector of my invention.

In the preferred form of my invention the carrying case may be comprised of two half-sections hinged together and adapted to open much in the manner of a book, with the inner reflective surfaces of the case in a desired geometrical position for efliciently reflecting the radiations from the lamp or radiation source in the desired directions. The hinge joining the two half-sections of the case is also arranged to pivotally support a channel frame member from which is carried the socket element or receptacle support for the plug-in radiation source or lamp, plug-in ballast resistor, and detachable line cord. The channel frame member is so inter-connected with the hinge, that the opening movement of the two half-sections of the case automatically positions the frame member carrying the socket element together with the plug=in lamp supported thereby at an intermediate erected position between the two reflective surfaces of the opened carrying case. An additional fine adjustment of the angular relation of the reflective surfaces and the lamp source is provided for by a novel arrangement of spring Wire supporting clip that is pivotally movable on the channel member from a first detent position within the closed case to a second detent position extending out of the case when opened and bearing against adjacent edge surfaces of the case half-section's in a manner to precisely position the angular relationship between the channel member and the two half-sections of the case forming the reflective surfaces. This last mentioned spring wire supporting clip structure is another novel feature of my invention.

Further objects and advantages of my invention will be apparent with reference to the following specification and drawings, in which:

Fig. 1 is a perspective elevational view of the complete portable lamp carrying case and reflector of my invention in the opened or operative position and with the plug-in lamp or radiation source, plug-in ballast resistor,- and detachable line cord in their operative positions;

Fig. 2 is a perspective elevational view of the two hinged half-sections of the carrying case together with the channel frame member in their open or operative positions and with the supporting lamp and ballast socket element removed for the sake of clarity;

Fig. 3 is a perspective elevation partly broken away of the plug-in ballast resistor;

Fig. 4 is an exploded perspective elevation partly in section of the plug-in socket, plug-in lamp, plug-in ballast resistor and detachable line cord to be assembled 3 in the channel frame member of the portable case shown in Fig. 2;

Fig. 5 is a detailed perspective view partly in section of a prefered embodiment of plug-in health lamp structure for use in the portable carrying case of my invention;

Fig. 6 is a wiring diagram of the complete lamp structure of my invention and showing the thermostatic starting switch elements contained within the outer radiation filtering glass envelope;

Figs. 7, 8 and 9 are top, side section and bottom views respectively of the top half of the plug-in socket element;

Figs. 10, 11 and 12 are top, side section and bottom views respectively of the bottom half of the plug-in socket element;

Fig. 13 is an exploded View of the electrical connectors and spring grips to be assembled between and within the top and bottom halves of the socket element;

Fig. 14 is a perspective view, with parts broken away,

of the bottom half of the plug-in socket element with the electrical connectors in their assembled position, and

Fig. 15 is a view of the assembled top and bottom halves of the socket element partly broken away to show the rivet assembly.

Referring to Figs. 1 and 2 of the drawings, the portable carrying case is comprised of the two half-sections 10 and 11 connected by a piano hinge 12 or the like to be opened to expose the inner

reflective surfaces

13 and 14 and the radiant energy source or lamp 15 in their operative positions. may be provided to be operative to lock the case halfsections 10 and 11 in the closed position as should be readily understood. If desired, heat insulation 18 may be interposed between the

reflective surfaces

13 and 14 and the respective carrying case half-sections as shown in Fig. 1.

As more clearly shown in Fig. 2 of the drawings, a channel frame member 20 is pivotally carried at 21 and 22 by the piano hinge 12. A tongue projection 23 of the case half-section 11 and a tongue projection 24 of the case half-section 10 project through openings 25 and 2 6 respectively of the channel frame member 20 in a manner to inter-connect with the frame member and limit the opened position of the case half-sections 10 and 11 and simultaneously position the channel frame member 20 to an intermediate position between the case halfsections. The channel frame member 26 is provided with a lower flange 27 which is adapted to receive the plug-in socket element to be later described in detail but generally shown at 30 in Fig. 1 of the drawings.

As shown in Figs. 1 and 4 of the drawings, the plugin socket element 36 is retained in the bottom of the channel frame member 24) as supported by the flange 27 by means of a spacer element 31 formed of ceramic or other heat resistant material. is provided with a projection 32 adapted to be received in an aperture 33 of the socket element 30. The other end of the spacer element 31 may be provided with a threaded bushing 34, and a screw 36 is adapted to extend through a metal retaining plate 35, and the hole 37 60 of the channel frame member 20 into the threaded hole 34 of the spacer element 31 to thus retain the spacer element 31 and the socket 36 in the channel frame member 20.

Holes

33 and 39 are provided in the sides of the channel frame member 20 adjacent its upper end and are adapted to receive the formed ends of a spring wire supporting clip 40, as shown in Fig. l. The metal retaining plate is provided with notched edges 35a and 35b respectively on each side to provide spring detent positions for the spring wire supporting clip 40, the notches 35a providing the detent position for the supporting clip 40 in the open or operative position, and the notches 35b providing the detent position for the spring clip 40 in the position (not shown) for closing the case. It will be noted, as shown in Fig. 1, that A keeper 16 and spring latch 17 The spacer element 3.1

the spring clip 40 in the operative position bears against the adjacent edges 41 and 42 respectively of the case half-sections 10 and 11 in a manner to accurately position the angular relationship of the case half-sections 1t and 11 and the channel frame member 20. Thus, the geometrical relationship of the radiation source 15 and the

reflective surfaces

13 and 14 are accurately determined upon opening the case half-sections 1t) and 11 and moving the spring supporting clip 40 to its open or operative position. A wire protective guard 41a may be provided to prevent accidental contact with the radiation source 15.

As more clearly shown in Figures 3 and 4 of the drawings, a plug-in ballast resistor 45 is adapted to be carried by the plug-in socket 30 in a position between the radiation source 15 and the ceramic spacer 31. The plug-in ballast is formed of two cylindrical sections of

ceramic material

46 and 47 containing

resistance elements

48 and 49 respectively, electrically connected together in series at 50 and connected at their other ends respectively to plug-in

prong connectors

51 and 52. The plug-in

prong connectors

51 and 52 are adapted to be received in suitable spring grip receptacles in the plug-in socket 30 to be later described in detail.

As shown in Figs. 4, 5 and 6 of the drawings, the radiation source generally shown at 15 is comprised of an outer glass envelope 55 having any suitable desired radiation filtering characteristics and fitted with plug-in

electrical prong connectors

56, 57 and 58 at one end. The plug-in prong connector 58 is not electrically connected within the light source unit 15 and is employed solely for providing the desired mechanical rigidity and may therefore be omitted if desired. Mounted within the outer glass envelope 55 is a smaller arc lamp 60 which may be of the mercury vapor type containing

arc electrodes

61 and 62 and a gas ionizing filament 63. Suitable insulating spacers 64- and 65 are provided to support the arc lamp 60 in the desired relationship within the glass envelope 55 and in this connection it will be noted that the arc lamp 60 is positioned eccentrically within the envelope 55 to be forwardly positioned as far from the ballast resistor 45 as possible when the radiation source 15 and ballast resistor 45 are plugged into the socket 30.

Also carried by the upper supporting insulating spacer 65 is a thermostatic switch 66 and a thermostat switch heating resistor 67. The switch 66 and thermostat heating resistor 67 are connected in series with the gas ionizing filament 63 and as such constitute an automatic starting switch for the arc tube 60. With reference to Fig. 6 of the drawings, as should readily be understood, alternating current from the line source 70 is initially conected through the ballast resistor 4849, thermostat resistor 67, gas ionizing filament 63 and normally closed thermostatic switch 66. After a short interval of time necessary to provide ionization of the gas within the vapor arc tube 60, the thermostatic switch 66 is opened due to the heating effect of the current passing through the thermostatic switch heating element 67. Thereafter, with the vapor in the arc tube 60 ionized, an arc discharge takes place between the

arc electrodes

61 and 62.

From the foregoing description, it will be noted that the arc tube 60, thermostatic switch contact 66 and thermostatic heating element 67 are all contained within the outer glass radiation filtering envelope 55 and that only two electrical connections are made at the base of the envelope 55. These electrical connections are shown on Figure 6 of the drawings at 71 and 72 respectively. Similarly, the lamp ballast resistor 45 is provided with two electrical connections shown at 72 and 73 respectively on Figure 6 of the drawings.

As shown in Fig. 4 of the drawings, the line cord 75 is provided with a conventional plug 76 at one end for connection with the A. C. source 70 and with a special receptacle 77 at the other end which is adapted to receive

connector prongs

78 and 79 of the plug-in socket 30. With particular reference to Figs. 7 through 15 of the drawings, the plug-in socket 30 will now be specifically described. The socket 30 is composed of a lower section 80 and an upper section 81, the details of the lower section 80 being shown in Figs. through 14, and the details of the upper section being shown in Figs. 7 to 9 of the drawing. The upper and

lower sections

81 and 80 are adapted to be riveted together by

rivets

82 and 83, embedded in the upper section 81. One of the riveted connections is shown at 84 in Fig. of the drawings. The upper section 81 of the socket is provided with three

openings

85, 86 and 87, adapted to receive

spring grip elements

88, 89 and 90, as shown in Figs. 13 and 14 of the drawings. The spring grip elements 83-90 are in turn adapted to receive the prong connectors 5658 of the radiation source 15, and another opening 91 in the upper socket section 81 is provided to permit the clearance of the glass sealing nipple 92 on the bottom of the outer glass envelope 55, as shown in Fig. 5 of the drawings. The spring grip element 88 is electrically connected by the metallic bridge 94 with a spring grip element 95 adapted to extend through the opening 96 and receive one of the prong connections 52 of the ballast resistor 45. An additional spring grip element 97 is adapted to extend through the opening 98 of the upper socket section 81 to receive the electrical prong connection 51 of the ballast resistor 45.

Spring grip elements

89 and 97 are also provided with prongs 100 and 191 respectively and electrically joined thereto by the

metallic bridge connections

102 and 103. The

prong elements

100 and 101 are adapted to extend through

openings

104 and 105 respectively of the lower socket section 80. The lower surfaces of the upper socket section 81 and the upper surfaces of the lower socket section 80 are recessed as shown to provide clearance for the connecting

elements

94, 102 and 103 and to accurately position the

spring grip elements

88, 89, 90, 95 and 97, together with the

prongs

100 and 101 when the upper and

lower socket sections

81 and 80 are assembled, as shown in Fig. 15 of the drawings. In such manner the electrical connections for the ballast and radiant energy source 15 are incorporated in the unitary socket structure 30, thus providing the two

electrical contact prongs

100 and 101 for connection with the receptacle 77 of the line cord 75, the two

spring grip elements

95 and 97 for plug-in connection with the ballast resistor 45, and further providing the spring grip connections S890 for plug-in connection of the radiant energy source 15.

The operation of the portable lamp source of my in vention should be readily apparent from the foregoing description, the operation of the various elements of the invention having been previously described in the course of their specific description. It should be understood that the novel arrangement of combined portable carrying case and reflector arrangement, together with the plug-in lamp and ballast resistor support of my invention may be readily used with various forms of radiant energy 5' sources such as ultra-violet lamps, photo-flood lamps and photo-flash lamps, bearing in mind that the salient features of the invention are the novel arrangement of the hinged case half-sections and supporting channel frame member arranged to provide automatic angular positioning of the radiant energy source and reflector elements when in the open or operative position.

I have also described a novel form of arc vapor lamp in combination with a radiation filtering envelope and thermostatic starting switch structure arranged for plug in operation and positioned relative to each other in a manner to insure the most eflicient operation. In this connection I have also described anovel form of unitary plug-in socket construction for both a plug-in radiation source and a plug-in ballast resistor, the electrical con-- 6 radiation source being provided for within the socket structure.

I claim:

1. A combined portable lamp casing and reflector comprising a pair of casing half-sections, hinge means pivotally connecting together one side of each half-section respectively, an upright frame member pivotally connected to said hinge means and positioned forwardly of said hinge means, said frame member being of a height less than said casing half-sections and enclosed within the casing formed by the closure of said casing half-sections, means, inter-connecting said casing halfsections and said frame member and positioned adjacent said hinge means to position said frame member to an angular position intermediate said casing half-sections and directly forward of said hinge means and limit the open position of said casing half-sections when opened, reflective surfaces on the inside walls of said casing halfsections, and a lamp carried by said frame member.

2. A combined portable lamp casing and reflector comprising a pair of casing half-sections, hinge means pivotally connecting together one side of each half-section respectively, an upright frame member pivotally connected to said hinge means and positioned forwardly of said hinge means, said frame member being of a height less than said casing half-sections and enclosed within the casing formed by the closure of said casing half-sections, means inter-connecting said casing half-sections and said frame member and positioned adjacent said hinge means to position said frame member to an angular position intermediate said casing half-sections and directly forward of said hinge means and limit the open position of said casing half-sections when opened, a plug-in lamp unit, a plug-in ballast resistor, a plug-in socket supported on said frame member having electrical contact openings receiving said plug-in lamp unit and said plug-in lamp ballast resistor.

3. A combined portable lamp casing and reflector comprising a pair of easing half-sections, hinge means pivotally connecting together one side of each half-section respectively, an upright frame member pivotally connected to said hinge means and positioned forwardly of said hinge means, said frame member being of a height less than said casing half-sections and enclosed within the casing formed by the closure of said casing half-sections, means inter-connecting said casing half-sections and said frame member and positioned adjacent said hinge means to position said frame member to an angular position intermediate said casing half-sections and directly forward of said hinge means and limit the open position of said casing half-sections when opened, reflective surfaces on the inside walls of said casing half-sections, a plug-in lamp unit, a plug-in ballast resistor, a plug-in socket supported on said frame member and having electrical contact openings receiving said plug-in lamp unit and said plug-in lamp ballast resistor.

4. A combined portable lamp casing and reflector comprising a pair of casing half-sections, hinge means pivotally connecting together one side of each half-section respectively, a frame member pivotally connected to said hinge means and adapted to be enclosed within the casing formed by the closure of said casing half-sections, means including at least one projecting member from each halfsection projecting through an aperture in said frame member and inter-connecting said casing half-sections and said frame member, said projecting members contacting walls forming said aperture to position said frame memher to an angular position intermediate said casing halfsections and limit the open position of said casing halfsections when opened, and a lamp carried by said frame member.

5. A combined portable lamp casing and reflector comprising a pair of casing half-sections, hinge means pivotally connecting together one side of each half-section nections for the circuits between the ballast resistor and respectively, a frame member pivotally connected to said hinge means and adapted to be enclosed within the casing formed by the closure of said casing half-sections, a spring wire supporting clip pivotally connected to said frame member and having two detent positions, a first detent positioned wherein said clip may be enclosed by said casing halfsections when closed, and a second detent positioned wherein said clip extends outward of said casing half-sections when opened to engage adjacent edges of said casing half-sections and determine the relative angular positions of said casing half-sections and said frame member when opened, and a lamp carried by said frame member.

6. A combined portable lamp casing and reflector comprising a pair of easing half-sections, hinge means pivotally connecting together one side of each half-section respectively, a frame member pivotally connected to said hinge means and adapted to be enclosed within the casing formed by the closure of said casing half-sections, means inter-connecting said casing half-sections and said frame member to position said frame member to an angular position intermediate said casing half-sections and limit the open position of said casing half-sections when opened, a spring wire supporting clip pivotally connected to said frame member and having two detent positions, a first detent positioned wherein said clip may be enclosed by said casing half-sections when closed, and a second detent positioned wherein said clip extends outward of said casing half-sections when opened to engage adjacent edges of said casing half-sections and determine the relative angular positions of said casing half-sections and said frame member when opened, reflective surfaces on the inside walls of said casing half-sections, and a lamp carried by said frame member.

7. A combined portable lamp casing and reflector comprising a pair of easing half-sections, hinge means pivotally connecting together one side of each half-section respectively, a frame member pivotally connected to said hinge means and adapted to be enclosed within the easing formed by the closure of said casing half-sections, a spring wire supporting clip pivotally connected to said frame member and having two detent positions, a first detent positioned wherein said clip may be enclosed by said casing half-sections when closed, a second detent positioned wherein said clip extends outward of said casing half-sections when opened to engage adjacent edges of said casing half-sections and determine the relative angular positions of said casing half-sections and said frame member when opened, a plug-in lamp unit, a plugin socket supported on said frame member and having electrical contact openings receiving said plug-in lamp unit, and reflective surfaces on the inside walls of said casing half-sections.

8. A combined portable lamp casing and reflector comprising a pair of easing half-sections, hinge means pivotally connecting together one side of each half-section respectively, a frame member pivotally connected to said hinge means and adapted to be enclosed within the casing formed by the closure of said casing half-sections, means inter-connecting said casing half-sections and said frame member to position said frame member to an angular position intermediate said casing half-sections and limit the open position of said casing half-sections when opened, a plug-in socket supported on said frame member, a plug-in lamp unit in said socket, said lamp unit having an outer glass radiation filtering envelope, and an arc tube within said envelope.

9. A combined portable lamp casing and reflector comprising a pair of easing half-sections, hinge means pivotally connecting together one side of each half-section respectively, a frame member pivotally connected to said hinge means and adapted to be enclosed within the casing formed by the closure of said casing half-sections, a plugin socket supported on said frame member having electrical contact openings for receiving a plug-in lamp unit and a plug-in lamp ballast resistor, a plug-in lamp unit in said socket, said lamp unit having an outer glass radiation filtering envelope, and an arc tube within said envelope, and a plug-in ballast resistor in said socket, said are tube being eccentrically positioned within said envelope to be away from said ballast resistor.

10. A combined portable lamp casing and reflector comprising a pair of casing half-sections, hinge means pivotally connecting together one side of each half-section respectively, an upright frame member pivotally connected to said hinge means and positioned forwardly of said hinge means, said frame member being of a height less than said casing half-sections and enclosed Within the casing formed by the closure of said casing halfsections, a plug-in lamp unit, a plug-in ballast resistor, a plug-in socket supported on said frame member having electrical contact openings for receiving said plug-in lamp unit and said plug-in lamp ballast resistor, said ballast resistor being positioned between said lamp unit and said frame member.

11. A combined portable lamp casing and reflector comprising a pair of casing half-sections, hinge means pivotally connecting together one side of each half-section respectively, a frame member pivotally connected to said hinge means and adapted to be enclosed within the casing formed by the closure of said casing half-sections, a plugin lamp unit, a plug-in ballast resistor, a plug-in socket supported on said frame member having electrical contact openings through the upper surface thereof for receiving said plug-in lamp unit and said plug-in lamp ballast resistor, an electrical plug-in line cord in the bottom of said socket, said lamp unit having an outer glass radiation filtering envelope and an arc tube within said envelope, said are tube being eccentrically positioned within said envelope away from said ballast resistor, said ballast resistor being positioned between said lamp and said frame member.

12. A combined portable lamp casing and reflector comprising a pair of easing half-sections, hinge means pivotally connecting together one side of each half-section respectively, a frame member pivotally connected to said hinge means and positioned to be enclosed within the casing formed by the closure of said casing half-sections, a plug-in lamp unit, a plug-in line cord, a plug-in socket supported on said frame member receiving said plug-in lamp unit and said plug-in line cord, said plug-in socket comprises an upper section and a lower section fastened together with a plurality of spring grip members and electrical connecting elements therebetween, the upper section having openings through which said spring grip members extend to receive the plug-in lamp unit, the lower section having extending therefrom a plurality of bayonet prongs to engage the plug-in line cord, said electrical connecting elements being connected between said prongs and said spring grip members to complete a circuit through the plug-in lamp unit.

13. A combined portable lamp casing and reflector comprising a pair of easing half-sections, hinge means pivotally connecting together one side of each half-section respectively, an upright frame member pivotally connected to said hinge means and positioned forwardly of said hinge means, said frame member being of a height less than said casing half-sections and enclosed within the casing formed by the closure of said casing half-sections, a p1ug-in lamp unit, a plug-in line cord, a plug-in ballast resistor, a plug-in socket supported on said frame member receiving a plug-in lamp unit, said plug-in line cord and said plug-in ballast resistor.

14. The invention of claim 13 wherein said plug-in socket comprises an upper section and a lower section fastened together with a plurality of spring grip members and electrical connecting elements therebetween, the upper section having openings through which spring grip members extend to receive the plug-in lamp unit and plug-in ballast resistor, the lower section having extending therefrom a plurality of bayonet prongs to engage the plug-in nected between said prongs and said spring grip members to complete a circuit through said lamp, and said ballast.

657,590 References Cited in the file of this patent 5 UNITED STATES PATENTS 1 ,083,442 Engfer Ian. 6, 1914 10 Furedy Aug. 24, 1943 FOREIGN PATENTS France May 24, 1929 OTHER REFERENCES Catalogue, L & C Mayers Co., 5th Ave., New York, page 283, 1942, D. E. Health-Aid Lamp.