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Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01K—ELECTRIC INCANDESCENT LAMPS
  • H01K1/00—Details
  • H01K1/18—Mountings or supports for the incandescent body

Definitions

• WITNESSES mmon
• Patent No. 239,372 is shown a lamp in which the glass wire-support is held in a tapering soft-rubber stopper forced in the neck of the globe.
• the wire-support cannot be forced by atmospheric pressure through the stopper into the globe, and the rubber stopper will be removed far enough from the light so that it will not be affected by heat conducted therefrom by the glass globe, and no mercury seal will be required to preserve an air-tight joint.
• a lamp of this construction is adapted to be taken apart when the carbon is destroyed, and all the parts except the carbon filament again utilized.
• the glass wire-support is made tubular in form and of sufiicient length to bring the carbon in the center of the globe.
• This tubular wire-support has its lower end enlarged or provided with a head or knob,which rests against the rubber stopper and prevents the forcing of the wire support into the globe by atmospheric pressure.
• the stopper is molded of pure, or nearly pure, rubber, in a polished mold, and has an exterior taper corresponding
• the stopper has a central opening, in which the glass wire-support firs closely. The stopper carryin g the wire-support is forced into the tapering neck, and the globe is then exhausted and sealed.
• the atmospheric pressure has a tendency to force the rubber stopper into the globe, and this pressure, on account of the taper of stopper and neck, serves to make the stopper close tight around the wire-support, and also to hug close to the surface of the globeneck.
• the knob or enlarge- No model.
• the carbon filament shall be in proper position within the globe.
• the stopper is then drawn out of the neck of the globe, carryin g the wire-support with it.
• a new carbon filament is attached to the leading-in wires, the globe has a glass tube fused to its upper end over theperforation made by breaking off the sealing-projection, and the wire-support and stopper are again inserted in the globe, when the globe is exhausted and sealed.
• the neck of the globe is of such length that the heat conducted downwardly by the glass is mostly diflused into the air, and the glass in contact with the rubber is not heated sufiiciently to affect the joint between the rubber and glass.
• FIG. 1 is a vertical section of an incandescin g electriclamp construct-ed according to my present invention.
• A is the glass globe, which is extended at A to form along neck, the lower end of which has an outward taper or flare.
• B is the long tubular glass wire-support, provided with an enlargement orknob, c, on its lower end.
• 0 is the tapering rubber stopper.
• D is the carbon filament, and a I) the leading-in wires.
• What I claim is- The combination of an inclosing-globe having a neck with outwardly-flaring sides, a perforated stopper with a correspondingly-shaped. exterior, and a tubular wire-support provided at its lower end with a knob or enlargement, and fitting tightly within the perforation of the stopper, all adapted and arranged to maintain a tightjoint and to determine the position of the carbon within the globe, substantially as set forth.

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• Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Description

Publications (1)

Family

ID=2320842

Family Applications (1)

Country Status (1)

• 0
  • US US251543D patent/US251543A/en not_active Expired - Lifetime

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