Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS1656793 A
Publication typeGrant
Publication dateJan 17, 1928
Filing dateOct 27, 1924
Priority dateOct 27, 1924
Publication numberUS 1656793 A, US 1656793A, US-A-1656793, US1656793 A, US1656793A
InventorsKayte Frank K
Original AssigneeKayte Frank K
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric bulb
US 1656793 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Jan. 17, 1928. 1,656,793


a Jan. 17, 1928.



Application filed October 2?, 192%. Serial No. 746,138.

My invention relates to electric illuminating bulbs and its primary object is the pro vision of an illuminating bulb which will give a maximum amount of light and at the same time increase the life of the bulb to a maximum. 7

The invention also provides an illuminating bulb having a plurality of filaments each of which is in an independent circuit and so arranged as to enable one of the filaments to be brought into operation after the other has become burned out.

Still another object of the invention is to provide an illuminating bulb having a plurality of filaments each of which being arranged in an independent circuit together with a novel means for including one of the filaments in the circuit after the original filament has become burned out. A 7

With the preceding and other objects and advantages in mind, the invention consists in the novel combination of elements, construction and arran ement of parts and operation, to be hereinafter specifically referred to, claimed and illustrated in the accompanying drawin s, wherein:

Figure 1 is a vertica sectional view of an electric lamp bulb constructed in accordance with my invention.

Figure 2 is a horizontal sectional view taken on line 2-2 of Figure 1.

Figure 3 is a similar view taken on line 3-3 of Figure 1.

Figure 4 is a top plan view of the lamp.

Figure 5 is a perspective of the circuit closing element embodied in the invention.

Referring to the drawings in detail wherein corresponding characters of reference denote corresponding parts throughout the several views, the numeral 5 designates a porcelain or other non-conducting base to which the lamp bulb 6 is attached. The

upper end of this lamp 6 is formed with an inwardl directed flange 7 which is drawn to provide a hollow base 8 for a depend- ,ing rod 9, the latter extending substantiall the entire length of the bulb as shown. A t readedsleeve 10 is received on the base 5 and is ada ted to be threaded in the usual socket not s own.

Filaments 11 and 12 are carried by the post 9 and each of which includes vertically extending legs 13 and 14 that pass throng the hollow base 8 and are connected to plugs 15 and 16 embedded in thebase A return wire 16 for the filament 11 passes transversely through the side wall of the hollow element 8 and is connected as at 17 to the sleeve 10. A similar return wire 18 is provided for the filament 12 and which extends vertically through the base 5 and has one end normally disposed in semi-circular grooves 18 formed on the outer face of the base 5. When it is desired to bring this filament 12 into operation, this end of the wire 18 is connected to a laterally disposed lug 19 formed on the sleeve 10.

A conducting plate 20 normally rests in a shallow recess 21 in the upper face of the ba se 5 and receives a circuit closing disk 22, the latter being provided with a pin or contact 23 engageable in either one of the plugs 15 and 16 to complete the circuit to either of the filaments above mentioned.

From an observance of Figure 2 it will be noted that a circuit through the filament 12 is shown while the circuit through the filament 11 is interrupted as in the case when the same burns out. o

While I have shown and described the preferred embodiment of the invention, I desire to have it understood that such changes in the form, construction and arrangement of parts may be made as will not depart from the spirit of the invention or the scope of the subjoined claim.

What is claimed is:

An electric light comprising a bulb, a non-conducting base to which the bulb is attached, a metallic sleeve on the base, a conductor plate carried by the base, sockets embedded in the base beneath the conductor plate, the ends of said sockets being spaced inwardly from the end of the base, a pair of filaments, each of which has one terminal connected with a coresponding socket and one of which has its other terminal connected to the sleeve, the remaining terminal being adapted to be connected to the sleeve in the event that the filament which is terminally connected becomes inoperative, a circuit closing disk contacting with the plate, a pin carried thereby and engageable in either of the sockets whereb the circuit maly he completed to eitherof t e filaments.

n testimony whereof I aifix my signature.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3260888 *Nov 19, 1962Jul 12, 1966Webb Jr John KTwo filament lamp with selector or switch
US4305637 *May 17, 1979Dec 15, 1981Thorn Electrical Industries LimitedCap assemblies for lamps
US6525455 *Sep 7, 2000Feb 25, 2003Matsushita Electric Industrial Co., Ltd.Bulb-form lamp and its manufacturing method
US6800009Aug 30, 2002Oct 5, 2004Matsushita Electric Industrial Co., Ltd.Bulb-form lamp and its manufacturing method
US20020195918 *Aug 30, 2002Dec 26, 2002Matsushita Electric Industrial Co., Ltd.Bulb-form lamp and its manufacturing method
U.S. Classification315/68, 439/615
International ClassificationH01K9/04, H01K9/00
Cooperative ClassificationH01K9/04
European ClassificationH01K9/04