US1953623A

US1953623A - Portable hand lamp

Info

Publication number: US1953623A
Application number: US568256A
Authority: US
Inventors: Charles S Mcgill
Original assignee: McGill Manufacturing Co Inc
Current assignee: McGill Manufacturing Co Inc
Priority date: 1931-10-12
Filing date: 1931-10-12
Publication date: 1934-04-03
Anticipated expiration: 1951-04-03

Description

PORTABLE HAND LAMP Filed Oct. l2, 1931 Patented Apr. 3, 1934 'rf garant PGR/TABLE HAND LAMP Application October 12, 1931, Serial No. 568,256

2 Claims.

My invention relates in general to portable hand lamps with a guard and reflector in connection therewith, and in particular to a means for relatively adjusting the lamp or reflector for centering the lamp in the reflector.

Portable hand lamps of the same general class as my invention have heretofore been designed to employ therein incandescent lamps of various sizes but the re'iector and Wire guard remained in the same position on the lamp regardless oi what size bulb was used. Under these circumstances it Was impossible for each of the various size bulbs, o1' perhaps anyone of them to lie in the proper focus in the reilcctor. As a result the efficiency of the lamp was impaired, and shadows in the reflection from the lamp made it difficult to use the lamp under all circumstances. Not only that but the hand lamp presented an undesirable appearance with the bulb out of symmetry with the reflector and guard.

An object of my invention is to provide means for positioning the reflector on the handle of the portable lamp so that the incandescent lamp is in the proper focus in said reflector, according to the size incandescent lamps inserted in the socket.

A further object of my invention is to provide such means for positioning the reector on` the handle which is inexpensive to manufacture, certain in operation, and which results in a hand lamp neat in appearance.

Other objects and advantages will appear as the description progresses.

Referring now to the drawing:

Fig. 1 is a front elevation of a portable hand lamp embodying my invention in which a small sized incandescent lamp is used.

Fig. 2 is a fragmentary front elevation of the hand lamp of Fig. l except that a larger lamp lamps are knocked about and dropped. This use necessitates a sturdy construction, and a guard and reector for the lampY which will withstand severe shocks. It is also necessary to provide a construction which may be manufactured at a minimum cost, so that the hand lamp may be retailed as a relatively cheap article.

With the above problems in mind I have designed a lamp sturdy in structure, neat in appearance, with means for adapting the reector to various size incandescent lamps.

Referring to 1, of my drawing, I have sh Wn for convenience a 40 Watt incandescent lamp 12 screwed into an ordinary socket mounted in handle 13 oi a portable lamp. The handle 13 may be constructed of a variety of materials, but have obtained very satisfactory results with use of resilient rubber. The latter not only serves as a good insulator but may be easily and cheaply molded to the desired shape. It also aids in frictionally retaining the guard and reflector. A guard (Fig. 1) with wires broken ofi 70 at the top and bottom as shown, so that the position or" the bulb 12 in relation to the reflector may be more easily seen tapers down to a bipart assembling and retaining ring 18. The guard is hingedly connected to the reflector at its top 19, and secured to the handle by means of

screws

21 and 22 through lugs on both portions of the bi-part retaining ring.

In order that the reilector may be positioned on the handle to bring the electric lamp in the 'proper focus I provide a plurality of

grooves

26 and 27 in the handle 13 in one of which the lower portion 20 of the guard and the channel 28 formed therein will fit. There is a corresponding member 29 on the reflector 17 (Fig. 2).

lugs

31 and 32 threaded to receive

screws

21 and 22. This construction is shown more clearly in Fig. 2 where the guard is entirely removed.

When, for example, it is desired to employ a 40 watt lamp the screws 2l and 22 are loosened, the 90 guard and reflector removed, and the lamp screwed intoI the socket. The lower portion of the guard and that of the reflector is fitted into groove 26 with channel 28 of the guard and channel 33 of the reflector resting against bead 34. With the

screws

21 and 22 tightened into the lugs on the guard and reflector, a very secure and certain t is obtained on the handle of the lamp.

The guard and reiiector are prevented from moving either up or down by the peculiar construction of the lower portion of each, resting against the abutment 35 and bead 34 on the groove 26. Thus the lamp Will survive very rough handling with the electric lamp always in focus throwing a perfect beam of iight upon the Work which it is illuminating. v

If, for example, it is desired to use a 60 Watt lamp, the guard and reflector may be fitted into groove 27 (Fig. 2) in the same manner as described in connection with the 40 Watt lamp, thus -10 This also has 85 I bringing the larger lamp in focus by the predetermined spacing of the groove 27 on the handle. Inasmuch as the electric lamps used today are of standard shape and dimensions for various outputs it is possible to accurately determine the spacing of the grooves on the handle, and any user will be able to t standard electric lamps into the portable hand lamp of my invention.

Although I have described my invention in conjunction with portable hand lamps using -either a or 60 watt electric lamp, and have shown and described the invention as adapted to only two adjustments for size of lamp, I do not restrict my invention to this alone, but aim to cover all that which comes within the spirit and scope of the appended claims.

What I claim is new and desire to protect by United States Letters Patent isz- 1. In a portable hand lamp, a handle having a socket secured therein adapted for receiving lamps of different sizes, a reflector and guard hingedly connected together tapering to a corresponding bi-part clamping ring neck narrowing into a semi-annular inwardly projecting bead and a semi-annular clamping ring adjacent thereto, said ring having outwardly extending ears at each end thereof, said handle having a plurality of annular grooves each having anges on each side of the groove and adapted to receive said bead and ring, with the bead abutting one of the flanges and the bottom of the ring abutting the other flange; and screws extending through the outwardly extending ears to clamp the bi-part neck in one of said grooves according to the size lamp in the socket whereby the lamp is rigidly positioned in focus with respect to the reflector.

2. In a portable hand lamp, a handle, a socket held stationary therein and adapted for receiving lamps of diierent sizes, a reflector, and a guard hingedly attached thereto, said reflector and guard having a bi-part clamping portion including an inwardly extending bead and a clamping ring adjacent thereto, a plurality of grooves in the handle and means for selectively securing said clamping portion in a groove whereby the reflector is supported in focus with a lamp in the socket.

CHARLES S. MCGILL.