Incandescent filament lamps

Claim 2

An electric lamp comprising an envelope having a pinch seal at one end thereof; a pair of lead wires extending from the inside to the outside of said envelope, at least one of said lead wires being sealed through and extending beyond said pinch seal, a cap disposed about said pinch seal, seating means including a plurality of lugs extending inwardly of said cap and abutting said pinch seal to prevent rotational movement of said envelope, said at least one lead wire being fixedly attached near its outer end to said cap to hold said seal against said lugs and to prevent said envelope from moving axially relative to said cap.

Claim 3

A lamp as claimed in claim 1, wherein said pinch seal tapers on at least one side from its centre towards at least one edge, said cap has a closed end, and said lugs comprise two pairs of lugs, the lugs of each pair being closer together at their ends nearer the closed end of said cap.

Claim 4

A lamp as claimed in claim 1, wherein portions of said lugs have a shape complementary to the shape of said pinch seal whereby a face to face contact is maintained between said seal and said lug portions.

Claim 5

A lamp as claimed in claim 1, wherein said lugs are formed by making cuts in said cap and bending inwards the sections of said cap thus freed.

Claim 6

An incandescent filament lamp comprising an envelope having a wedge-shaped pinch seal at one end thereof, the thin end of the wedge being the end remote from the filament; a pair of lead wires sealed through said pinch seal in spaced apart relationship to one another and extending beyond said pinch seal, said lead wires being connected at their inner ends to said filament, a cap disposed about said pinch seal; seating structures including a plurality of lugs having flat sides extending inwardly of said cap and abutting the sides of said wedge shaped pinch seal to prevent rotational movement of said envelope, said lead wires being fixedly attached to said cap to hold said seal against said lugs and to prevent said envelope from moving axially relative to said cap.

Claim 7

An incandescent filament lamp comprising an envelope having a wedge-shaped pinch seal at one end thereof, the thin end of the wedge being the end remote from the filament; a pair of lead wires sealed through said pinch seal in spaced apart relationship to one another and extending beyond said pinch seal, said lead wires being connected at their inner ends to said filament, a cap disposed about said pinch seal; seating structures including a plurality of lugs having flat sides extending inwardly of said cap and abutting the sides of said wedge shaped pinch seal to prevent rotational movement of said envelope, said lead wires being fixedly attached to said cap to hold said seal against said lugs and to prevent said envelope from moving axially relative to said cap.