US767875A - Electric-lamp attachment. - Google Patents

Description

Nb. 767,875. PATENTED AUG 16, 1904.

H. DOLIBR, JR. ELECTRIC LAMP ATTACHMENT.

v APPLICATION FILED JULY 16, 1904. K0 MODEL.

Illl

an. .44 6M fig aum UNITED STATES Patented August 16, 1904.

HENRY DOLIER, JR, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRIC-LAMP ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 767,875, dated August 16, 1904. Application riled July 15, 1904. Serial No. 216,684. (No model.

To (LZZ whmn it may concern.-

Be it known that I, HENRY- DOLIER, J r., a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Electric- Lamp Attachment, of which the following is a specification.

My invention relates to incandescent electric-lamp attachments, more especially such as will permit the employment of a plurality of ordinary incandescent lamps jointly in such position that their longitudinal axes may be maintained horizontal even in the case where the lamps are to be suspended by the usual drop-cord. v

A further feature of my invention is an arrangement whereby the plurality of incandescent lamps may be rotated to any position about the dropcord or other support and whereby the lamps may be caused'to take any desired position and beindependent of the twisting efl'ects or tendenciesof the cord and whereby electrical communication is maintained between the lamps and cord or fixture.

For illustrations of two of the many forms my invention may take, reference is to be had to the accompanying drawings, in which Figure 1 is a vertical sectional view, partly in elevation, of a two-lamp attachment. Fig. 2 is a vertical sectional view, partly in elevation, of a' two-lamp attachment employing an attachment-plug for connection with the circuit.

Referring to Fig. 1, C is an ordinary cord drop consisting of the two conductors a 6. These conductors are led through the usual bushing 0, secured in the metallic casing (Z, which has a shape corresponding with that of the ordinary lamp-socket. Within thecasing (Z is a porcelain member 6, which extends downwardly against a second porcelain member or terminal base f. Within the opening in the member a is journaled the key-shaft g, to the outer end of which is secured the usual key-handle K. The conductor a is held under the binding-screw 7t: thus placing the conductor a in electrical communication with the contact i, which is in the form ofa metallic spring extending into the path of the member j, rotated by the shaft 9. The member jengages will break connection between 2' and it in the manner well understood in lamp-sockets, and thus rupture the circuit. The conductor b connects with the metallic member Z, which terminates in the spring-contact m, which presses upon the head of the screw 71 The porcelain members 0 and f are secured together by screws, such aso, and the casing g is secured to eby the screws 1), as well understood in lamp-sockets.

On the under side of the memberf is the annular member q, secured in place by the screws 0 and the screw r, the latter serving also to place the metallic member 9 in electrical communication with the contact is. Integral with the member is the downwardlyextending brush a, which engages the annular metallic member t, embedded in the third porcelain member a. The member a is rotatable with respect to the member f, the rotation being about the axis of the member f or of the screw 11'. The screw n is held against rotation with respect to the member a by the jam-nut o. The head of the screw is engaged by the contact m and rotates with respect to the same.

The porcelain member a carries also the socket-shells 10w, adapted to receive the screwthreaded bases 00 of the lamps LL, whose filaments 1 are in approximately horizontal position, thus giving maximum illumination in vertical directions. The socket-shell 0/; is in electrical communication with the annular contact 25 through the downardly depending portion 2, to which it is secured by a screw .2. The other socket-shell w is connected with the members through the socket-shell on and the member 1 and the screw 2, whose head engages the shell 10.

3 is a contact secured to the porcelain member u and serves to engage the button-contacts a of the lamps.

The path of the current may be traced as follows: from conductor a, through z', 7', 7r, 9', q, .5, 25, e, w, and w, filaments y, buttons 4, contact 3, screw 71, contact m, to conductor 7), the two lamps being shown as connected in parallel. They may, however, be connected in series.

To whatever position the lamps may be rotated the path of the current remains as traced, since electrical communication is maintained by the engagement of brush .w with annular contact 6 and the engagement of the contact on with the head of screw 92.

A metallic casing incloses the porcelain member a and the lamp-sockets, such casing being rotatable with the member w. This casing is divided into the upper half 5 and the lower half 6, the parts being held together by the screw 7 which engages in the insulatingblock 8, in which the screw 02. also engages. The split casing 5 6 has cylindrical projections 9 9 provided with beads 10 10, adapted to inclose the beaded ring portions 11 of the halfshades 12 12. By this construction the halfshades 12 may rotate about the axis of the lamps L L.

The above-described attachment makes it possible to quickly adapt to a cord drop or fixture a plurality of lamps rotatable with respect to the cord drop or fixture, the lamps being held in approximately horizontal position, so that the maximum illumination can be directed verticallydownward or to any other desired region by means of the rotatable shades.

13 is the usual insulating-lining in the easing (Z, and 1 1 14 are the usual insulating-bushings surrounding the socket-shells.

In Fig. 2 the parts are the same as in Fig. 1, except that the porcelain member f and all parts above the same are replaced by the attachment-plug 15, having the threaded contact 16 and the center contact 17, adapted to engage 'in an ordinary lamp-socket and serving as circuit-terminals. Connection is made between 16 and the contact 18 on the lower side of the plug in the well-known manner by the connectors 19, extending through the plug 15. 20 is a brush similar to s' of Fig. 1, which engages the annular contact zf. As described in connection with Fig. 1, the lamps are rotatable to any position about the axis of plug 15 and electrical communication is maintained at all positions. Similarly the reflectors or halfshades 12 12 are rotatable with respect to the lamps.

Though I have shown lamps with Edison bases and sockets, it is to be understood that my invention is equally applicable to the Thomson-Houston and \Vestinghouse contacts.

It is to be understood also that more than two lamps may be employed, it being desirable, however, that the lamps be so disposed with respect to each other as to form a balanced system, so that when suspended by a cord drop or the like each lamp will be maintalned W1th its axis approximately horizontal.

That I claim is 1. In combination, a terminal carrying member, a member secured thereto and rotatable with respect thereto, a plurality of lampsockets secured to said rotatable member. a casing inelosing said sockets, and a plurality ofreflectors supported by and rotatable with respect to said casing.

2. In combination. a terminal carrying member, a plurality of lamps supported thereby and rotatable with respect thereto, and a rotatable shade for each of said lamps.

3. In combination, a terminal carrying member, a member rotatable with respect thereto, a plurality of lamp-sockets supported by said rotatable member, the axes of said lamp-sockets being at approximately right angles with the axis of rotation of said rotatable member, and a casing inelosing said lamp-sockets and said rotatable member.

I. In combination, circuit-terminals, a support therefor, a member rotatable with respect to said support, a plurality of lampsockets secured to said member, means for maintaining electrical communication between said lamp-sockets and said circuit-terminals, and a casing inelosing said lamp-sockets.

5. In combination, an attachment-plug, a member supported thereby and rotatable with respect thereto, a plurality of lamp-sockets secured to said member, and means for maintaining electrical communication between said attachment-plug and said lamp-sockets.

6. In combination, an attachment-plug, a member secured thereto and rotatable with respect thereto, a plurality of lamp-sockets secured to said member, and a casing inelosing said lamp-sockets.

7. In combination, an attachment-plug, a member secured thereto and rotatable with respect thereto, and a plurality of lamp-sockets secured to said member, the axes of said lamp-sockets being at approximately right angles with the axis of rotation of said member.

8. In combination, an attachment-plug, a plurality of lamps supported thereby and rotatable with respect thereto, and a shade rotatable with respect to each of said lamps.

9. In combination, an attachment-plug, a

casing rotatable with respect thereto, a plurality of lamps rotatable with said casing and having their axes at approximately right angles with the axis of said attachment-plug, and a shade for each lamp rotatable with respect to said casing.

10. In combination, an attachment-plug, a member secured thereto and rotatable with respect thereto, and a plurality of lamp-sockets secured to said member, the axes of said lamp-sockets being at an angle with the axis of said attachment-plug.

HENRY DOLIER, JR.

Vitnesses:

BURTON J. ANDERSON, F. M. BRYAN,

Images