US1771957A - Electric lamp - Google Patents

Description

N l. .1. HAMNER 1,771,957

ELECTRIC LAMP I Filed May 22, 1 1.925

INVENTUA .MLLARU L7. HAMMER, 2y

' 4e leading-in wires 14 and 15.

Patented Ju1 f29, 1930 [TED STATES PATENT. OFFICE r MILLARD a. HAMNER, or CLEVELAND, OHIO, AS$IGNOR TO GENERAL ELECTRIC comrm, A CORPORATION or NEW YORK ELECTRIC LAMP Application filed May 221,

' April 18, 1916.

In. a gas-filled electric lamp, which is ordinarily mounted base upward, the base and continugous parts are heated considerably by convection currents which rise from the filament region It has been customary in some cases to provide a disc deflector to break up such currents and to protectthe base of the lamp firom them. My invention comprises such a deflector and an efiectivemeans of mounting it. e

My invention is illustrated in the accompanying drawings in which Fig. 1 is an elevation of a gas-filledelectric incandescent lamp inwhich it is embodied; Fig; 2'is a plan'in 2 section along the line 2-2 of Fig. 1; and Fig. 3 is an enlarged plan of the deflector 0r shield. v

The lamp illustrated in Fig.1 cdmprises a bulb 10 having a comparatively short neck 5 11 which is provided at its upper end with a base 12. Within the bulb there'is a stem- 13 which has sealed therein the leading-in wires 1415. The customary method'of sealing in these leading-in Wires is to extend them I so; through the stem tube, to fuse the inner end Ofthe stem tube and to compress by clamping the fused'glass around the said wires. This results in a fiat solid mass of glass 16'atthe inner endof thestem tube. Integrally united as to the stem tube 13 is an arbor 17 usually of glass which has su ports 18 sealed therein which engage the lament 19. Current is supplied to the filament 19 through the conductors 20- -21which are connected to the As hereinbefore stated, the lamp illustrated, is of the gas-filled type and inord'er to prevent the hot gas from rising up into the neck portion 11 of the bulb 10, I provide a 4,5 shield or deflector 22 The shield or de- 1925. Serial No. 32,193.

flector is preferably made of metal and, as shown in Figs. 2 and 3, comprises a pair of semi-circular stampings 23-24 recessed at 2526 so as to conveniently fit about the clamped portion 16 of the stem tube 13. The stampings 23-24 are attached to the clamped portion 16 by means of the pointed tabs 2728 extending from the members 23.24 and forming-an integral part thereof. The as sembly of the stampings 23-24 may take place during the manufacture of the stem. This permits the tabs 2728' to be inserted immediately after the fused portion has been clamped at which-time the glass is still in a semi-plastic condition.

After the stampings 23 24: have been assembled and attached to the clamped portion 16, as shown in Fig.2, they form a disc having a vent 29 therein allowing a certain amount of the hot gas to pass therethrough. This is'of advantage as it prevents an overheating of the members 23 21 and also allows a certain amount of the vaporized filament material to deposit on the stem and in the upper neck portion where discoloration is comparatively harmless.

What I claim as new and desire to secure by Letters. Patent of the United States, is:

1. In an electric lamp, the combination of a bulb, a stem sealed to said bulb, leadingin conductors extending through and sealed in a clamped portion of said stem and'a deflector located in a plane substantially transverse to'the axis of said stem and comprising aplurality of disc members each having a portion sealed in said clamped portion of said in wire seal portion of said stem and having a space therebetween.

3. In an electric lamp, the combination of a bulb, a stem sealed to said bulb, leading-in 5C conductors extending through and sealed in a clamped portion of said stem and a deflector comprising a pair of disc members located in substantially the same plane one supported on each side of said stem and hav'- 10 iniaspace therebetween.

h dwlilitlness vlilrhiereofi Ifiiavellggeunto set my on t 's-19t a 0 ay miLARDU. HAMNER.

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