FR498006A - Improvements in electric arc lamps - Google Patents

Improvements in electric arc lamps

Info

Publication number: FR498006A
Authority: FR; France
Prior art keywords: electric arc; arc lamps; lamps; electric; arc
Prior art date: 1917-04-04
Legal status (The legal status 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 status listed.): Expired

Application number

Other languages

French (fr)

Inventor

Horace Bere Grylls

Walter Heape

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Individual

Original Assignee

Individual

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.)

1917-04-04

Filing date

1919-04-08

Publication date

1919-12-24

1919-04-08 Application filed by Individual filed Critical Individual

1919-12-24 Application granted granted Critical

1919-12-24 Publication of FR498006A publication Critical patent/FR498006A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B31/00—Electric arc lamps
- H05B31/003—Electric arc lamps of a special type
- H05B31/0039—Projectors, the construction of which depends upon the presence of the arc

FR498006D 1917-04-04 1919-04-08 Improvements in electric arc lamps Expired FR498006A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB498006X		1917-04-04

Publications (1)

Publication Number	Publication Date
FR498006A true FR498006A (en)	1919-12-24

Family

ID=1533283

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR498006D Expired FR498006A (en)	1917-04-04	1919-04-08	Improvements in electric arc lamps

Country Status (1)

Country	Link
FR (1)	FR498006A (en)

1919
- 1919-04-08 FR FR498006D patent/FR498006A/en not_active Expired

Similar Documents

Publication	Publication Date	Title
FR486167A (en)	1918-03-14	Improvements in electric arc lamps
FR498006A (en)	1919-12-24	Improvements in electric arc lamps
FR442176A (en)	1912-08-26	Improvements in electric lamps
FR477109A (en)	1915-09-24	Improvements in electric lamps
FR490239A (en)	1919-04-09	Improvements in electrical switches
FR496905A (en)	1919-11-20	Improvements in the manufacture of carbon brushes for electric arc lamps
CH77449A (en)	1918-04-16	Electric arc lamp
FR505380A (en)	1920-07-29	Improvement in electric lanterns
FR498816A (en)	1920-01-23	Improvements to electric arc lamps
CH75109A (en)	1917-10-01	Electric torch with plate-shaped elements
FR520036A (en)	1921-06-18	Improvements in incandescent electric lamps
CH76261A (en)	1917-11-16	Electric hand lamp
FR483560A (en)	1917-07-20	Improvements in acetylene lamps
FR480290A (en)	1916-07-12	Improvements in incandescent electric lamps
FR24357E (en)	1922-06-20	Improvements made to electric rotary arc lamps
FR502482A (en)	1920-05-15	Improvements made to electric rotary arc lamps
CH71126A (en)	1915-12-01	Arc light electrode
CH75507A (en)	1917-10-01	Electric flashlight
CH76490A (en)	1918-01-02	Electric flashlight
FR489712A (en)	1919-03-05	Improvements in ozonators
CH71743A (en)	1916-02-16	Electric flashlight
FR481918A (en)	1917-01-31	Improvements in the construction of reflector electric lamps
FR481847A (en)	1917-01-23	Improvements in electric arc furnaces
FR478326A (en)	1915-12-03	Improvements in electric brakes
CH67325A (en)	1914-12-01	Arc light electrode