US901993A - Carbon pencil of electric-arc lights. - Google Patents

Carbon pencil of electric-arc lights. Download PDF

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Publication number
US901993A
US901993A US42800908A US1908428009A US901993A US 901993 A US901993 A US 901993A US 42800908 A US42800908 A US 42800908A US 1908428009 A US1908428009 A US 1908428009A US 901993 A US901993 A US 901993A
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Prior art keywords
electric
carbon
pencil
carbon pencil
arc lights
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Expired - Lifetime
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US42800908A
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John Nicholson
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current

Definitions

  • My invention relates to carbon pencils of electric arc lights and particularly tothe -lower carbon of lower electrode.i
  • My invention relates more specifically to the cored lower electrode of the so called luminous arc light.
  • 1 indicates a carbon pencil which is designed as the lower electrode of? an arc light. This 'is centrally cored as at 2, and filled with a suitable mixture as at 3, which is composed lof any of the substances now used for this purpose.
  • the disk and extends substantially centrally through the core 3.
  • the substance of which the core is composed is a non-conductor or at the best a poor conductor.
  • the member 5 is formed preferably of iron wire, Number 14 gage being found by experiment to be A the most suited'for the purpose.
  • VfIhe pencil is completed by a cylindrical jacket 6, incasing the carbon 1, and formed of thin sheet iron.
  • An electrode for an arc light comprising a cored carbon pencil having a metal cap and a 'metal strip secured to said cap and extending 4 substantially centrally through the core, s'ubstantiallyfas described.
  • An electrode foran arc light comprisL ing a cored carbon pencil having a metal cap and a metal strip secured to said cap and eX- tending centrally through said core and terminating at a. distance from the socket end, substantially as described.
  • An electrode for an arc light comprising a cored carbon pencil having a metal cap and a metal jacket, ⁇ substantially as described.

Description

Patented 0692714908.
J. NICHOLSON. CARBON PENCIL OF ELECTRIC ABC LIGHTS.
APPLICATION FILED APR. 20, 19C!!1 wir nous JOHN NICHOLSON, OF FRAGKVILLE, PENNSYLVANIA.
CARBON PVENGIL OF ELECTRIC-ARC LIGHTS.
`Specification of Letters Batent.
y Patented Oct. 27, 1908.
v pinceau mea April zo, 190s. serial nu. 42eme.'
- To all inkom 'it may concern:
Be it known that I, JOHN Nrcnonson, a citizen of the United States, resldmg at `'I4`rackville, in the county of Schuylkill and State of Pennsylvania, have invented certain new and use ful Improvements iuCarbon Pencils of Electric-Arc Lights, of which the l following is a specification.
My invention-relates to carbon pencils of electric arc lights and particularly tothe -lower carbon of lower electrode.i
My invention relates more specifically to the cored lower electrode of the so called luminous arc light. e
AMy invention will be more readily uncerstood by reference to the accompanying drawin which is' a. longitudinal sectional E an electrodeembodying iny invention in its preferred form.-
Referring nowV to the drawings, 1 indicates a carbon pencil which is designed as the lower electrode of? an arc light. This 'is centrally cored as at 2, and filled with a suitable mixture as at 3, which is composed lof any of the substances now used for this purpose.
- The end is closed or covered by a ca 4. Thisis formed of a diskof thin sheet 1ron and is held in place by a metal strip 5, which is secured to the center of the underface .ofV
the disk and extends substantially centrally through the core 3. The substance of which the core is composed is a non-conductor or at the best a poor conductor. For obvious rear,
rectly through the core or to establish a circuit through the member 5, hence the strip '5 terminates some distance from the socket end| of the electrode or pencil. The member 5, is formed preferably of iron wire, Number 14 gage being found by experiment to be A the most suited'for the purpose. VfIhe pencil is completed by a cylindrical jacket 6, incasing the carbon 1, and formed of thin sheet iron.
Having thus described my invention what I claim as new and desire to secure by Leti ters Patent is `1. An electrode for an arc light compris ing a cored carbon pencil having a metal cap and a 'metal strip secured to said cap and extending 4 substantially centrally through the core, s'ubstantiallyfas described.
2, An electrode foran arc light comprisL ing a cored carbon pencil having a metal cap and a metal strip secured to said cap and eX- tending centrally through said core and terminating at a. distance from the socket end, substantially as described.
3. An electrode for an arc light comprising a cored carbon pencil having a metal cap and a metal jacket,` substantially as described.-
In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
. JOHN NICHOLSON.
Witnesses:
SAM. I. STEINBAGH, C. W. TRAUTMAN.
US42800908A 1908-04-20 1908-04-20 Carbon pencil of electric-arc lights. Expired - Lifetime US901993A (en)

Priority Applications (1)

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US42800908A US901993A (en) 1908-04-20 1908-04-20 Carbon pencil of electric-arc lights.

Applications Claiming Priority (1)

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US42800908A US901993A (en) 1908-04-20 1908-04-20 Carbon pencil of electric-arc lights.

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US901993A true US901993A (en) 1908-10-27

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US42800908A Expired - Lifetime US901993A (en) 1908-04-20 1908-04-20 Carbon pencil of electric-arc lights.

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