Title:
COIL FILAMENT AND INCANDESCENT LAMP
Document Type and Number:
Japanese Patent JP2016134270
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a coil filament having stable luminescent properties and stable reliability by constituting a uniform winding pitch over the entire length of a winding part, and to provide an incandescent lamp using the same.SOLUTION: A coil filament 3 formed of a tungsten parallel element wire 1 is fabricated in such a manner that: around the parallel element wire 1 formed by bringing two tungsten wire members 1a, 1b in contact with each other in parallel, a molybdenum winding wire member 10 is spirally wound to form a string of original wire 11; the original wire 11 is then spirally wound to be formed into a coil filament shape 14; and thereafter, the molybdenum winding wire member 10 is molten by using mixed acid and is removed.SELECTED DRAWING: Figure 3
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Inventors:
FUTAMI YOICHI
SOGA RITSU
INOUE MASAKAZU
SATO ISAMU
SOGA RITSU
INOUE MASAKAZU
SATO ISAMU
Application Number:
JP2015007763A
Publication Date:
July 25, 2016
Filing Date:
January 19, 2015
Export Citation:
Assignee:
WITHUP KAIYOSHA CO LTD
STANLEY ELECTRIC CO LTD
STANLEY ELECTRIC CO LTD
International Classes:
H01K3/02; H01K1/08
Domestic Patent References:
| JPS4949110B1 | 1974-12-25 | |||
| JP2005032552A | 2005-02-03 | |||
| JP2002124217A | 2002-04-26 | |||
| JPS4949109B1 | 1974-12-25 | |||
| JPS62143362A | 1987-06-26 |
Attorney, Agent or Firm:
Teruo Akimoto
Daisuke Yoshizawa
Daisuke Yoshizawa
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