US656115A - Incandescent lamp. - Google Patents

Description

No. 656,l|5. Patented Aug. l4, I900.

C. HOELSCHER.

INCANDESCENT LAMP.

(Application filed Apr/30, 1900.)

(No Model.)

UNITED STATES CHRISTIAN HOELSCHER, OF WARREN, OI-IIO.

INCANDES CiENT LAMP.

SPECIFICATION forming part of Letters Patent No. 656,115, dated August 14, 1900.

Application filed April 30, 1900. Serial No. 14,953. (No model.)

To a whom it may concern.-

Be it known that I, CHRISTIAN HOELSOHER, of Warren, in the county of Trumbull and State of Ohio,have invented certain new and useful Improvements in Incandescent Lamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention contemplates certain new and useful improvements in incandescent electric lamps. Ithas reference to that class of lamps employing a plurality of filaments and means for so controlling the current that it may be cut into either filament alone or both in series and multiple, according as it is desired to have a dim or bright light.

The improvement in the present case is especially applicable to the WVestinghouse socket, the alterations in the construction of which do not prevent the use of the regular type of lamp applicable thereto.

The objects of the present invention are to provide extremely simple means for regulating the light to be given forth bythe lamp and also to permit of the use of the ordinary lamp in connection with the socket. The invention will be hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a-vertical sectional view taken through the lamp and socket, which are shown slightly separated. Fig. 2 is face view of the base. Fig. 3 is a lower face view of'the socket.

Referring to the drawings, A designates an incandescent-lamp bulb having three leading-in wires a b c, which are connected to the two sets of filaments, numbered 1 and 2. The leading-in wire a leads from a post 3, projecting from the axial center of base 4-, while wires 1) and 0 lead, respectively, from contactplates 5 and 6, set in said base.

B is a socket of the Westinghouse type, having in a partition b a central opening in which is fitted a spring contact-plate 7 to accommodate and hold the post 3. In electrical connection with this central contact-plate is a plunger 8, located in partition 1) near the with the altered socket.

central opening. This plunger is of the spring and telescopic sleeve pattern. With this plunger the post 10 of current-wire 12 is connected. The other current-wire 13 leads to a post 14, which is connected with the springcontact tongue 15 on the lower or exposed face of partition I). The addition of the plunger constitutes the sole change in the construction of the lamp-socket; but this does not in any way preclude the use of the regular type of WVestinghouse lamp in connection The lamp is, as customary, held in position by spring-fingers 16 of the socket connecting an annular ridge 17 of the lamp-bulb.

Itwill be noticed that the contact-plates 5 and 6 are of such length and conformation along their inner opposite edges, being cut out at 18, that changes in contacts between plates 5 and 6, with plunger 8 and tongue 15, may be had by turning the lamp axially in its socket. filaments may be controlled as follows: To dimly light the two filaments, the lamp is turned to place plate 5 of the base in contact with tongue 15 of the socket. To light filament 2 alone, plate 6 of the base is brought into contact with tongue 15. To light filament No. 1 alone, plate 5 is brought into contact with tongue 15, while plate 6 is placed in engage- In this way the current to the ment with plunger 8, while to light both filaments to the maximum capacity the lamp is axially turned to place plate 6 in contact with tongue 15 and plate 5 with plunger 8.

Thus it will be seen that without the addition of any separate part between the lamp and socket the current to either or both filaments may be controlled by simply turning the lamp axially. It will be understood that post 3 always remains in contact with plate 7 while the lamp is in the socket, thus completing one terminal, the other of which is controlled by the positions of the contact-plates of the base. The relative arrangement of the contact-plates is such that but one of them maybe in electrical engagement with the contacts of the terminals or both may be, according to the light it is sought to obtain from the lamp. In other Words, by providing the socket with a main terminal and two auxiliary terminals and the base with a contact for engaging said main terminal and two contact-plates for engaging either or both the auxiliary terminals current to the filaments may be controlled by turning the lamp axially.

I claim as my invention- 1. The combination with a socket having a main terminal and two auxiliary terminals, of a lamp having a plurality of filaments therein, a central contact for constantly engaging said main terminal, and two other contacts for engaging either or both of said auxiliary terminals when the lamp is turned axially, said filaments being connected to said contacts of the lamp.

2. The combination with a socket having a main terminal andtwo auxilary terminals, of a lamp having a plurality of filaments therein, a post projecting centrally from the base of the lamp for constantly contacting with said main terminal, and two other contacts for engaging either or both of said auxiliary terminals when the lamp is turned axially, said filaments being connected to said post and contacts of the lamp.

The combination with a socket having a main terminal and two auxiliary spring-actuated terminals, of a lamp havinga plurality of filaments therein, a central contact for constantly engaging said main terminal, and two other contacts for engaging either or both of said spring-actuated terminals when the lam p is turned axially, said filaments being connected to said contacts of the lamp.

4. The combination with a socket having a main terminal and two auxiliary spring-actuated terminals, of alamp havinga plurality of filaments therein, a base on said lamp having a contact-post for constantly contacting with said main terminal, two contactplates in said base for engaging either or both of said spring-actuated terminals when the lamp is turned axially, said filaments being connected to said post and contact-plates, as set forth.

5. The combination with a socket having a central terminal-plate, a plunger in electrical connection therewith, and a spring-terminal, of a lamphaving a plurality of filaments, a base, a post projecting centrally therefrom for constantly engaging said central terminal plate of the socket, and two contact-plates in said base for engaging either the plunger or spring-terminal, or both, when the lamp is turned axially, said filaments being connected to said post and contact-plates, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

CHRISTIAN HOELSCIIER.

Vitnesses:

FRANK S. CHRYST, ELMER O. DILLEY.

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