US2016722A - Illumination lamp - Google Patents

Description

N. D. LEVIN ILLUMINATI ON LAMP Filed Oct. 22, 1929 Patented Oct. 8, 1935 UNITED STATES PATENT OFFICE ILLUMINATION LAMP Application October 22, 1929, Serial No. 401,534

10 Claims.

The invention relates to an illuminating lamp. Where it is necessary to provide artificial light to facilitate operation of machinery or the like,

great inconvenience has been caused by the tendency of lamps providing such light to be broken and put out of commission through the carelessness of operators of machinery, or through the operation of the machinery itself.

For instance, in the case of a mining machine where artificial light is essential, the usual lamp attached to such machinery is not of durable enough construction to long withstand the operation of the machinery, or the liability of workmen throwing tools on top of the machine and against the lamp.

it has also been found desirable in the case of mining machines and the like, to provide a lamp which will throw a beam of light in any direction and, at the same time, provide a shield from 2 9 the light behind which the operator can stand order not to be blinded by the glare.

The o ct of t in en i n is t o id a amp which can be placed on machinery of various type he e l nat n i c s y to aci itate operation of su m o in Another object or the invention is'toprovide a lamp of such construction as to be exceedingly strong and durab Another object of the invention is to provide 39 a lamp which will throw rays 9f light in the desired directions.

,Still another object oi the invention is to proride a lamp which will be cheap to manufacture and yet efiicient in every respect.

3 With these and other objects and advantages in mind, attention is called to the drawing, in which:

Figure 1 is a side elevation ,of the assembled lamp. c

Figure 2 is a plan view.

4, Figure 3 is a vertical cross section, and

Figure 4 is a view of the protective screen shield. Referring specifically to the drawing, in which like numbers indicate like parts, there is pro vided a base member I having .ears 2 with apertures 3 .therein for securely fastening the device in any suitable place on the equipment with which it is to be used. An insulation block 4 is secured to the inside of the base member I and has attached thereto a common lamp socket 5,

in which is placed the usual electric light bulb 6. A stufiing box l5, of a design well known in the art, is provided for the passage of a conductor to the lamp socket. The base member is provided with an upwardly extending flange I having a groove 8 therein. A plurality of bolts l4 having shoulders thereon are screw threaded into the outer edge of the base member I.

A metal cap It is provided with a downwardly extending flange H, having therein groove ii. The metal cap fits upon shoulders on the tops, of 5 the bolts l4, and is held securely in place by ordinary nuts. The base and top members are constructed of metal, and have a sufiicient cross section to withstand abnormal compression and also radiate heat caused by the illuminating element. 10

Within the grooves 8 and I2 is placed suitable packing l3, and tightly held by said packing is a cylindrical glass globe 9.

To prevent the breakage of the glass, a relatively'heavy wire screen I6 is placed around the 15 shoulders I1 and [8 of the base and top members, respectively.

The screen shield may be a complete circle of open work, or it may be made partly or sheet metal, such as is shown in Figure 4, wherein the 20 wire screen I6 is connected by any suitable means to the sheet metal portion [9. Provided at the bottom of the sheet metal portion are a series of holes 20 which, with the use of a sharp pointed tool, quick rotation of the metal part and screen 2, may be had, in' order that the rays of light may be cast in the desired direction. i

In order to provide for brilliant reflection of the light,-the upper side of the base member, the under side of the cap member, and the inside of the sheet metal shield may be coated with white enamel or a phosphorous paint.

in the particular embodiment of my invention herein shown, the base and top members are of circular design, although such circular construc- 35.

tion may be departed from. 4 7

My invention isnot limited to the exact construction herein shown, but is subject to various changes and modifications within the spirit oi the ap ndedo m 1.';In a larnp, a base member having anupwardly extending rib, a top member having a downwardly extending rib, an illuminating element interposed therebetween, independent to ri id se r sai members t a base and top members to each other, transparent protective means secured in said grooves, and a rotary protective means abutting the outer shoulders of said ribs.

3. In a lamp, a base member having an upwardly extending rib, a groove in said upwardly extending rib, an illuminating element attached to said base member, a top member having a downwardly extending rib, a groove in said downwardly extending rib, means to rigidly secure said base and top members to each other, transparent protective means secured in said grooves, rotary protective means abutting the outer shoulders of said ribs, said rotary protective means being partly opaque.

4. In a lamp, a base member, an illuminating element carried by said base member, a top member, transparent protective means held between said base and top members and surrounding said illuminating element, and protective means mounted for rotation on said top and base members and having reticular and opaque sections.

5. In a lamp, the combination with a relatively heavy flat base member, of a relatively heavy flat opaque top member spaced therefrom, an illuminating element supported by said base member, transparent protective means between said base member and said top member and completely surrounding said illuminating element, a rotary opaque shutter in substantially vertical position outside of said transparent protective means and between said base member and said top member, the shutter having the shape of a segment of a cylinder and constantly obscuring the illuminating element from a point of View determined by its rotary adjustment while permitting the constant projection of light from the lamp through the complementary segmental portion of the cylinder of which it is a segment, said shutter including a reflector on the inner face thereof, and a plurality of bolts rigidly connecting the top and bottom members.

6. In a lamp, the combination with a relatively heavy flat base member, of a relatively heavy flat opaque top member spaced therefrom, an illuminating element supported by said base member, transparent protective means between said base member and said top member, a rotary opaque shutter between said base member and said top member and outside of said transparent protective means, the shutter having the shape of a segment of a cylinder and constantly obscuring the illuminating element from a point of view determined by its rotary adjustment while permitting the constant projection of light from the lamp through the complementary segmental portion or" the cylinder of which it is a segment, said shutter including a reflector on the inner face thereof, means adjacent the peripheries of the base and top members respectively for guiding said segmental shutter for complete rotation, and a plurality of bolts rigidly connecting the top and bottom members.

7. In a lamp, the combination with a relatively heavy flat base member adapted to rest on and slide over a supporting surface, of an illuminataoia'i ing element carried by said base member, a con: nection from a source of illuminative supply to said illuminating element through said base member above the bottom surface thereof, a relatively heavy top member spaced above and mounted on said base member, a plurality of bolts rigidly connecting the top and bottom members, transparent protective means held by and between said base member and said top member and completely surrounding said illuminating element, and means outside of said transparent protective means to control the projection of light in varying directions, said last-named means including a reflector.

8. In a lamp, the combination with a base member adapted to rest on and slide over a supporting surface, of an illuminating element carried by said base member, means extending through said base member above the bottom thereof for connecting said illuminating element to a source of illuminative supply, an opaque top member spaced above said base member, a cylindrical transparent protective means between said base member and said top member, means for clamping said top member against said transparent protective means and the latter against said base member, and cylindrical protective means mounted for rotation between said base member and said top member outside of and concentrically with said transparent cylindrical protective means, said outer protective means having perforate and opaque segments, the opaque segment of said protective means constantly obscuring the illuminating element from a point of view determined by its rotary adjustment and the perforate segment permitting the constant projection of light from the lamp therethrough.

9. In a lamp, the combination with a relatively heavy flat bottomed base member, of a relatively heavy flat top member spaced therefrom, an illuminating element between said base member and said top member, transparent protective means surrounding said illuminating element between said base member and said top member, adjustable protective means surrounding said illuminating element including an opaque shutter mounted for rotation outside of said transparent protective means, and a plurality of bolts rigidly connecting the top and bottom members.

10. In a lamp, the combination with a rela tively heavy flat bottomed base member, of a relatively heavy flat top member spaced therefrom, an illuminating element between said base member and said top member, transparent protective means surrounding said illuminating element between said base member and said top member, adjustable protective means surrounding said illuminating element including an opaque shutter mounted for rotation outside of said transparent protective means, said shutter including a reflector on the inner face thereof, and a plurality of bolts rigidly connecting the top and bottom members.

NTLS D. LEVIN.

Images