US2398968A

US2398968A - Electric lamp

Info

Publication number: US2398968A
Application number: US554247A
Authority: US
Inventors: Grover C Singer
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-09-15
Filing date: 1944-09-15
Publication date: 1946-04-23
Anticipated expiration: 1963-04-23

Description

April 23, 1946. G. c. Smm v 2,398,968"

ELECTRIC LAMP Filed Sept. l5, 1:944

Patented pr. 23, 194% UNITED STATES PATENT OFFICE 2,398,968 ELECTRIC LAMP l Grover C. Singer, Brownsville. Tex.

Application September 15, 1944, Serial No. 554,247 2 Claims. (Cl. 176-37) This 'invention relates to electric lamps.

An object of the invention is the provision of an electric lamp having a bulb formed integrally with the base and composed of transparent materials, the base being provided with an axial passage connecting the interior of the bulb with the exterior, a plug sealed within the passage and carrying embedded lead-in Wires with filaments attached thereto forming an insertible unit.

Another object of the invention is the provision of an electric lamp having a bulb formed integrally with the base member' and composed of transparent materials, the base being provided with an axial passage adapted to receive a plug which is hermetically sealed to the walls of the passage, the inner end of the plug being provided with a reflector with lead-in wires em=- bedded in the plug and having their inner ends projecting into the interior of the bulb, filaments being connected to pairs of the lead-in wires with one filament being located outwardly of lthe other filament, the plug, lead-in wires and filaments forming a unit which is received within. the bulb and passage in the base member.

A further object ofthe invention is the provision of an electric lamp having a bulb and base member formed integrally and composed oftransparent materials, the base member being provided with a wide axial passage to receive a plug which is hermetically sealed to the walls of the passage said plug having a pocket at its inner end with laments disposed in the pocket, said filaments being carried by lead-in wires which are embedded in the plug, the bottom of .the pocket being curved and provided with a reflecting surface.

This invention willl be best understod from a consideration of the following detailed description, in View of the accompanying drawing forming a part of the specification; nevertheless, it is to be understood that .the invention is not con'lned to the disclosure, being susceptible of such changes and modifications as define no material departure from the salient features of the invention as expressed in the appended claims.

In the drawing:

Fig. 1 is a vertical section of one form of an electric lamp constructed according to the principles of my invention.

Fig. 2 is an enlarged view in elevation of a prong which projects from the base of the lamp.

Fig. 3 is a vertical section of a modiiied form -of the lamp shown in Fig. l.

Fig. 4 is a fragmentary plan viewv of the laments and removable plug mounted within the bulb and base of the lamp, shown in Fig. 3.

Fig. 5 is a vertical section of another form or the lamp.

Referring more particularly. to the drawing (Fig. 1), it designates a bulb which is formed of glass. The bulb is provided with a front Wall I l, which has the outer face corrugated as shown at I2. A base member i@ is also formed of transparent materials and is cast integrally with the bulb it.

The base i3 is provided with a, central passage is which connects the interior of the bulb with the exterior. 1t will be4 noted that the passage id has a relatively' large diameter.

A plug i5 is received within the passage ld and is adapted to be sealed to the walls of the passage for hermetically closing the bulb l to the atmosphere. The plug i is provided with an axial passage it and this passage is employed for exhausting the air from the bulb i0 after which the outer end of the passage is closed by any suitable form of cement as shown at il.

Three lead-in wires, 2b, 2i and 22 are embedded in the plug l5 with the inner ends of the Wires projecting into the bulb i. Filaments 23 and it are connected to the inner ends of the lead-in wires in any approved manner. The

. outer ends of the lead-in wires as shown at 25,

2t and @l are bent fiat against the outer end of the base it and these ends are secured within the openings 28 (Fig. 2). in an associated prong. In other words, the portion 25 of the lead-in wire 20 is connected to a prong 29 while the bent end of the wire 22 is connected to a prong 3Q. The outer end of the wire 23 is connected to the prong si. .Any number of lead-in wires may be employed for supporting more than two filaments. In other words, lead-in wires 2t, 2! and 22 may support the iilarnents 23 and 2Q at one side of a vertical plane passing through the longitudinal axis of the plug i5 while a similar number of lead-in wires for filaments may be mounted at the other side of said vertical plane.

The plug l5 is provided with an annular groove 2 aseaece when hardened not only cements the prongs in' position but hernietically seals the plug in position.

The inner-end of the plug l5 is curved and is covered with a reflecting material 3l. The inner side walls of the bulb l are also covered with reflecting material as shown at 8e. A patch of reflecting material 39 is located on the inner face of the member ll directly above the laments 23 and g2@ in order to cut down the glare from the headlight since the rays from the iilaments are reflected back into the bulb and against the reflecting surface Bilanci these rays are modified before theyv are projected from the bulb.-

It'will be noted' from this construction that the plug l5 together with the lead-in wires and the filaments form a unit so that the plug may be inserted into the passage l s and hermetically sealed thereto.

Referring more particularly to Fig. 3, a. plug d@ is sealed within the passage 4l by a cement or a plastic with the plastic 42 in the grooves d3 and dd not only aiding in securing the plug d0 in position but for securing prongs 5, d6 and di in position. The plug d is provided with a central passage d8 through which the air may be withdrawn from the bulb lila when the lamp hasv been completed. The outer end of the passage is closed by the usual form of cement 49.

The inner end of the plug Il!) extends into the surface indicated at l2 has less area than the patch of reflecting surface shown in Fig. l. This bulb la with the inner end of the plug having A pair of lead-in wires and 6I are likewise embedded in the base 40 but the outwardly

curved ends

52 and 53 respectively of the wires 60 and 5| are disposed adjacent the inner end of the plug 40 and carrying affilament 64. When the niaments 5l and 64 are illuminated a strong light is projected from the bulb. On the other hand the vilament 54 may be dimmedl or cut out so that the lament SI will supply the illumination which provides a. safer driving light. A patch of reilecting material 65 is secured to the inner face of the closure 55 and is located directly above the filament 64 so that rays from the lament will be reflected back before said rays are projected into the atmosphere in order to prevent too great a diffusion of the light from the ilaments.

Referring more particularly to Fig. 5 it will be seen that the bulb Ib and the base 10 are substantially the same as the bulb and base shown in Figs. l and 3. The only distinction is the different type of plug Il which is employed. The inner face of the bulb is provided with substanl tially the same reecting surface asv shown in is due to the fact that the ilament 'is and the plug 'H are confined in a smaller area.

The plug H is inserted in the passage ld and sealed to the walls of the passage as are the plugs 'l5 and dil. The annular grama 5 in the base 'lll is identical in construction as that shown in Figs. 1 and 2, but the groove le has a substantially smaller crosssectional area. Prongs il and i3 are likewise employed and secured in place by a cement or plastic which is applied to the grooves l5 and 'l5 and to the outer wall of the plug li.

The inner end of the plug ll extends into the bulb lb and is provided with a pocket which has a convex bottom wall Si which is covered with reflecting material as shown at 82.

Lead-in wires 83 and 84 are embedded in the plug ll and project into the pocket 80 for supporting the lament 73. While two lead-in wires only are shown it will be appreciated that any number may be employed for the purpose to Support a plurality of filaments. The outer ends of the lead-in wires 83 and S are bent iiat against the outer end of the plug 'H and are connected with the respective prongs 'Il and 18 in the same manner as has been described above.

In Fig. 2 is shown an enlarged view of a prong detached from the base member i3. It will be noted that the inner end 85 of this prong is roughened so that when the cement or plastic is applied to the same the roughness will aid in preventing ready release of the prongs.

The outer end of the prongs is not only provided witha small opening 28 but with a larger opening 86 in which is connected a wire or other connection to the usual source of current.

I claim:

l. An electric lamp comprising a bulb, a base formed integrally with the bulbv and composed of transparent materials, the base having an axial passage, a plug fitted into the passage, lead-in wires embedded in the plug and projecting into the bulb, nlam'ents attached to the inner ends of the lead-in wires, the walls of the passage and the plug being provided with facing grooves. metal prongs located between the plug and walls of said passage and extending from the grooves to points outwardly of the plug. and a'sealing means lling the grooves for not only hermetically attaching the plug to the base but for securing the prongs in position. l V

2. An electric lamp comprising a bulb, a base formed integrally with the bulb and composed of transparent materials, the base having an axial passage.' a plug fitted into theA passage, :lead-in wires embedded in the plus and projecting into prongs located between the plug `and walls of said passage vand extendingfrom .the grooves to points outwardly. oi'V the plug, and a sealing means filling the grooves for not only hermetically attaching the plug to the base but f or'seeuring the prongs in position,"the inner end of the plug-being curved projecting into th-bulb and Drovidec with a reflectingsurface thereon. l

' GROVER C. SINGER.