IT1271730B - Incandescent electric lamp with supplementary filament - Google Patents

Incandescent electric lamp with supplementary filament

Info

Publication number
IT1271730B
IT1271730B ITMI942494A ITMI942494A IT1271730B IT 1271730 B IT1271730 B IT 1271730B IT MI942494 A ITMI942494 A IT MI942494A IT MI942494 A ITMI942494 A IT MI942494A IT 1271730 B IT1271730 B IT 1271730B
Authority
IT
Italy
Prior art keywords
filament
electric lamp
incandescent electric
supplementary
incandescent
Prior art date
Application number
ITMI942494A
Other languages
Italian (it)
Inventor
Silvano Schiarratura
Original Assignee
Silvano Schiarratura
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Silvano Schiarratura filed Critical Silvano Schiarratura
Priority to ITMI942494A priority Critical patent/IT1271730B/en
Publication of ITMI942494A0 publication Critical patent/ITMI942494A0/en
Publication of ITMI942494A1 publication Critical patent/ITMI942494A1/en
Application granted granted Critical
Publication of IT1271730B publication Critical patent/IT1271730B/en

Links

Landscapes

  • Resistance Heating (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

An incandescent electric lamp with a back-up filament. The lamp comprises a main metallic filament which is made incandescent by the passage of current, for the emission of light, located within a glass bulb, and also comprises at least one supplementary filament in the same glass bulb, connected electrically in parallel with the main filament. The risks of a simultaneous burn-out of both filaments are thus significantly reduced. <IMAGE>
ITMI942494A 1994-12-12 1994-12-12 Incandescent electric lamp with supplementary filament IT1271730B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ITMI942494A IT1271730B (en) 1994-12-12 1994-12-12 Incandescent electric lamp with supplementary filament

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI942494A IT1271730B (en) 1994-12-12 1994-12-12 Incandescent electric lamp with supplementary filament

Publications (3)

Publication Number Publication Date
ITMI942494A0 ITMI942494A0 (en) 1994-12-12
ITMI942494A1 ITMI942494A1 (en) 1996-06-12
IT1271730B true IT1271730B (en) 1997-06-04

Family

ID=11369977

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI942494A IT1271730B (en) 1994-12-12 1994-12-12 Incandescent electric lamp with supplementary filament

Country Status (1)

Country Link
IT (1) IT1271730B (en)

Also Published As

Publication number Publication date
ITMI942494A1 (en) 1996-06-12
ITMI942494A0 (en) 1994-12-12

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19971222