US1900539A - Reading lamp - Google Patents

Description

C. T. BRADY READING LAMP March 7, 1933.

Filed Nov. 27 1929 2 Sheets-Sheet C ar/ejf ATTORN 5Y5 March 7, 1933. c T. BRADY 1,900,539

READING LAMP Filed Nov. 27. 1929 2 Sheets-Sheet 2 I I INVENTOR C ar; grad,

I 111 I l/ ATTORN EYS Patented Mar. 7 1933 "UNITED STATES PATENT OFFICE The present invention pertains to a novel CHARLES T. BRADY, F DETROIT, MICHIGAN READING LAMP Application filed November, 1929. Serial 110.41 .0918. f Y

F 4: is a bottom plan view; and

reading lamp adapted for insertion in a lamp, socket wherever disposed.

One of the objects of the invention is to .5 provide a device of this character which may bodily be substituted "for the'incan-' descent lamp of a shaded lamp structure and at, the same time permit ample illumination of the lamp shade for decorative purposes. Another object is to renderthe shaded lamp structure, thus modified more suitable for reading and similar purposes. Further objects reside in protecting the lamp structure from breakagedue to expansion and contraction and also to provide ample venting in keeping with the same purpose. c r A v The device is built within a lamp housing or body fitted at one end with an adapter Whichenters a lamp socket and in turn receives an incandescent-lamp disposed withinftheh housing. Thus, the housing and lamp therein may readily be substituted bodily for the incandescent lamp of a shaded'living -room lamp. The lamp housing .iscomposed of a suitable translucent material adapted to withstand the heat generated by the incandescent lamp and also permitting; by its translucent character, illumination of the outer lamp shade for the purpose stated above.

In the lower end of the lamp housing is inserted a lamp structure adapted to modify the rays eminatingfrom the incandescent lamp in such a manner as to impart the character of daylight thereto and thus render the light more suitable for reading purposes. As already indicated, the cushion- 40 ing device and venting means are provided to prevent breakage of the lens structure and lamp housing during the contraction of the latter.

The invention is fully disclosed by way A of example in the following description and in the accompanying drawings, in which Figure l is a side elevation showing the lamp applied to the standard of a bridge 50 Fig. 2 is a vertical sectionof the lamp;

Fig. 3 is a plan view thereof;

Fig. 5 is a longitudinal section of a modified construction. I

Reference to these views will now be made by use of like characters which are employed to designate corresponding parts throughout. a The lamp is supported from a screw. socket by means of a plug member 1 having threads 2 at one end adapted to enter such socket and enlarged and threaded at its lower end as at '3. In the last named threads is received the plug 4 ofian 'incan descent lamp 5 of suitable wattage. In the upper or outer part of the member 1 is -mounted a terminal rod 6 imbedded in insulating material? separatingit from the metallic part of the member 1. Thelower end of the terminal -6 is engaged by the usual terminal intheupper end of the plug 4 as illustrated ii -Figure 2. v

The lamp 5-is enclosed withina housing 8 having an open lower end and having its upper end covered by a hood or dome 9 fixed to the lower threads of themember 1, thereby enclosing the threads 3 and leaving the threads 2 exposed outside'the'housing 8. Into the dome 9 is fitted a liner 10 of metal. or othermaterial adapted to serve as a reflector. Air vents 11 are out through the dome and reflector in a circular series as shown more clearly in Figure 3.

The lower open end of the lamp'housing is enlarged at 12 and internally threaded lower edge of this ring has an inwardly extending flange 15 providing a shoulder for supporting a piano-convex lens 16. Over the lens 16 is mounted a flat lens 17 of a bluish color adapted to impart the character at 13 to receive a threaded lens frame or 1 ring 14 as clearly shown in Figure 2. The

of daylight to the rays eminatingfrom the incandescent lamp 5, as described in detail in my pending application, Serial No. 281,747 filed May 31, 1928. I

Over the lens 17 a split spring ring 18 is fitted into a groove 19 formed in the inner wall of the ring 15. As shown in Figure2, the spring ring in conjunction with the flange 15 maintains the lenses in a tight :65 ing parts described in Figure 2.

The frame 15 is further formed with a circular series of air vents 21 communicatlng with the interior of the housing 9 at throats 22 formed between the upper edge of'the 8 directly above the enlargement 12. The main portion of the slots is oifset laterally and outwardly from the throats: 22 to obstruct astraight line path from any part of the lamp 5 directly through the slots, whereby to prevent the passage of rays directly from the lamp 5. to the exterior of the housmg.

. The housing 8 is constructed of any material having a translucent character and adapted to withstand the heat generated by the lamp '5. Preferably, the material is a molded product having the character of horn ,orbone when finished.

In Figure 1 the device is illustrated as inserted in the socket 23 of a bridge lamp standard 24 having the usual bridge lamp shade 25 enclosing the socket 23 and hence the lamp structure comprised within the housing 8. The translucent-character of the housing 8 permits acertain amount of 51- lumination of thelampshade 25, so that the decorative value of the latter is not lost. The rays issuing through the lenses 16 and 17 are modified in the manner described resemble daylight, whereby the device is rendered exceptionally valuable for reading and similar purposes. It will also be apparent, that, due to the adapter 1, the lamp may readily be inserted in any socket adapted to receive a conventional incandescent lamp. i

The modification shown in Figure 5 is adapted for adjustment of the lamp housing with respect to various sizes of lamps that may be used therein. The dome 3O surrounding the adapter 31 is a separate member preferably consisting. of metal and having the inner surface thereof polished so that it may serve as a reflector. The lower end of the dome is threaded at 32 to receive the upper end of a separate open ended lamp housing 33 which preferably consists of material such as that described in connection with the member 8 of Figures 1 to 4. On the lower end ofthe housing is screwed a rim as which in turn is internally threaded at 35 to receive a lens frame or ring 36 and associated lens structure. The frame and lens structure are'similar to the correspond- This form of device lends itself to modification by removal of the housing 33 and the substitution of another housing 37 of different shape or character. For example a larger housing may be substituted in case it is desired to use a larger lamp 38. The lower end of the housing 37 carries a rim 39 which in turn receives a lens assembly in the manner already described.

Although specific embodiments of the invention have been illustrated and described, it will, be understood that various alterations in the details of construction may be frame 15 and the inner wall of the housing made .withoutdeparting from the scope of 'the invention,'as indicated by the appended claims.

What I claim is:- s

1. A lamp comprising a housing having an open end and a closed end, an adapter mounted in and passing through said closed end, said adapter having one end adapted for insertion in a lamp socket and the other end adapted to receive a lamp plug, a lens frame mounted in said open end, said frame having an inner flange, a lens mounted in said frame andresting on'said flange, and a spring ring holding said lens against said flange. I

2. A lamp comprising a housing of translucent material having an open end and a closed end, an adaptermounted in and passing through said closed end, said adapter having one end adapted for insertion in a lamp socket and the other end adapted to receive a lamp plug, a lens frame mounted in said open end, said frame having an inner flange, a lens mounted in, said frame and resting on" said flange, and a spring ring holding said lens against said flange.

3. V A lamp comprising a housing having an open end and a closed end, an adapter mounted in and passing through said closed end, said adapter having one end adapted for insertion in a lamp socket and the other endadapted to receive a lampplug, a lens frame mounted in said open end, said frame having an inner flange, a lens mounted in said frame and resting on said flange, and a fos spring ring holding said lens against said I flange, said frame having air vents formed therethrough and communicating with the interior of said housing.

4. A lamp comprising a housing having an open end and a closed end, an adapter mounted in and passing through said closed end, said adapter having one end adapted for insertion in a lamp socket and the other end adapted to receive a lamp plug, a lens frame mounted in said open end, said frame having an inner flange, a lens mounted in said frame and resting on said flange, a spring ring holding said lens against said flange, said frame having air vents formed therethrough and communicating. with the interior of saidhousing, and an incandescent lamp inserted in said adapter and disposed Within said housing, said vents being positioned to intercept a straight line drawn from any point of said incandescent lamp to the outer end of any of said vents;

In testimony whereof I afiix my signature.

CHARLES T. BRADY.

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