US1176676A - Lamp and lamp-cap extractor. - Google Patents

Description

B. M. HAMPARTSOOMIAN.

LAMP AND LAMP CAP EXTRACTOR.

APPLICATION FILED )ULY 12. I915.

Patented Mar. 21 1916.

fienjamin MHamparoomian;

Tn! COLUMBIA rumoakum co.

BENJAMIN M. HAMPARTSOOMIAN, OF BOSTON, MASSACHUSETTS.

LAMP AND LAMP-CAP EXTRACTOR.

Specification of Letters Patent.

Patented Mar. 21, 1916.

Application filed July 12, 1915. Serial No. 39,303.

T 0 all whom it may concern:

Be it known that I, BENJAMIN M. HAM- PARTSOOMIAN, a citizen of the United States, and a resident of Boston, 'in the county of Suffolk and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Lamp and Lamp-Cap Extractors, of which the following is a full, clear, and exact specification.

In telephone switch-boards most commonly used, the lamps are inserted in frietion-tight cylindrical sockets closed by translucent caps. When the lamps need renewal because of broken filaments or other reasons, the caps are first extracted, and after that the lamps. For such extractions, several instruments are usually employed, necessitating considerable fumbling and delay in selecting the proper one.

The object of this invention is the construction of a single combination instrument or tool adapted for the extraction of both the caps and lamps and of two different sizes of the lamps.

Referring to the drawings forming part of this specification, Figure 1 is a perspec tive view of an instrument made in accordance with my invention. Fig. 2 is a plan view, partly in section, showing the instrument in its folded condition. Fig. 3 is a side view of the same partially unfolded. Fig. 4 is a face view of a section of switch board having two different sized lamps carried thereby. Fig. 5 is a sectional view of the same through X-X in Fig. 4.

As shown in Fig. 5, the incandescent bulbs l are cylindrical and slidable into the cylindrical cage 2, contacts 3 being fused to opposite sides of the bulb for conducting the current to the filaments within. The caps consist of translucent lenses 4 carried by the thimbles 5 slidable friction tight into the ends of the cylindrical cages 2. These caps are first removedwhen it is necessary to renew the bulbsby means of nippers introduced within the notches 6; after which other devices are pressed into the cages for engagement with the bulbs. All the foregoing is, of course, well known, and only described in order better to set forth the nature of my invention.

The cap-extracting nippers in my device consist of a length of spring metal bent into hair pin shape to compose two legs 10 each having a narrow lip 11 at its extremity pro- At a. point spaced from the section 12 is pivotally supported the lamp extracting member 13, a single pivot 14 serving to pivotally hold the nippers and member 13 between the ends of the handle 15, which is also made by bending a length of sheet metal into an elongated U-shape. The length of the handle is made sufficient to receive the nippers when swung over therein, as shown in Fig. 2.

The lamp extracting member 13 comprises two short tubular sections 16, one of an in terior diameter slightly less in diameter than the larger lamp bulb, and the other than the smaller lamp bulb. Each grasping socket 1G is longitudinally slit at several points to enable it to pass about a bulb and to grasp with sufficient force to enable the latter to be drawn out from their places Within the cages 2. The length of each grasping socket is made slightly less than the distance from the pivot 14 to the intermediate or transverse section 12, in order that the grasping member may be turned into alinement with the other parts when the nippers are folded into the handle. The handle 15 is preferably provided with a swivel-eye 19 (Fig. 2) to permit of attachment to a key-ring or chain.

In using this combination instrument, the nippers 10 are turned outward in line with the handle, the lips 11 are pressed into the notches 6 and into engagement with the shoulder 7 of the cap, and, by pulling upon the nippers, the cap is withdrawn. The grasping member is then turned to a transverse position, as shown in Fig. 1, and the grasping socket 16 of proper size introduced within the cage 2 until the bulb therein has been suitably gripped. An outward pull easily brings with it the seized bulb.

The bringing into operative position of the three instrumentalities comprising the nippers and the two grasping sockets, is a far easier and more expeditious act than the fumbling for and selecting each of the same when made separate. Moreover, the weight of the combination is considerable less than that of the three separate tools. In addition, the nippers can be used for the removal of splinters, should the electrician accidentally get any in his hands.

What I claim as my invention and for;

which I desire Letters Patent is as follows, to wit A combination tool comprising-nippers formed from sheet metal bent to compose two legs and an intermediate section joining the legs. a grasping member consisting of two differently sized tubular grasping sockets, and a U-shaped handle embracing the nippers, a pivot being passed through the ends. of thehandle, transversely through he gr sp n mem and: hr u e ppers at points sufficiently spaced from the intermediate section to receive the grasping member-in the same plane with the nippers. In testimony that I claim the foregoing invention, I have hereunto set my hand this 7th day of Julv, 1915.

BENJAMIN M. HAMPARTSOOM'IAN. Vllitnesses:

P. A. FnEDERIcKsoN, A. B. UPHAM.

00 1c; orthis paten may b obta ne t r fiw ch, y a jlr i e: t efiQ mmiesionen otdzatenita Washington, D. 03"

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