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US 4,061,940 AGranted
Baseless cartridge lamp and socket therefor
AssigneeWagner Electric Corporation
InventorsJames J. Fitzgerald, Joseph J. Fortunato, Nickolas P. Demas
Life of this patent
Estimating the term…
Abstract
A dual filament lamp is installed in its cooperating socket without the use of intermediate base, cement or bulb stem. The elimination of the intermediate elements improves the ability to manufacture lamps having precise filament alignment with respect to their sockets.
Claims7
An electric lamp and cooperating socket therefor comprising:
- a. at least three conductive support members sealably embedded in a lamp envelope;
- b. each of said support members having an inside part and an outside part;
- c. said inside parts of said support members being connected to at least two electrical components;
- d. mounting means formed in said outside parts;
- e. socket means having at least three means for cooperative supporting and power supplying engagement with said at least three outside parts;
- each of said at least three means for cooperative supporting and power supplying engagement being electrically insulated from at least two others;
- and
- f. said mounting means containing installation limiting means cooperating with the supporting means on said socket to require installation on said socket means in a single rotational orientation.
5 more elements
A dual filament electric lamp and socket of a type wherein each filament is adapted to illumination independently of the other filament comprising:
- a. two electrically heatable filaments;
- b. means for supporting said two electrically heated filaments;
- c. an envelope enclosing said filaments and a portion of said supporting means;
- d. end portions of each supporting means protruding from said envelope;
- e. means for hermetically sealing said envelope to said supporting means at the points where said supporting means pass through said envelope;
- f. a socket receiving electric power from two means for connecting power;
- g. at least three means on the external portion of said supporting means for mechanical and electrical connection of said lamp to said socket;
- h. said socket having at least three means for cooperative supporting and power supplying engagement with said at least three outside parts;
- each of said at least three means for cooperative supporting and power supplying engagement being electrically insulated from at least two others;
- and
- i. means on said socket and supporting means for requiring insertion of said lamp in said socket in one particular rotational orientation and preventing installation in at least one other orientation.
8 more elements
Dependencies are inferred from the claim text.