US1065141A - Projector-carbon. - Google Patents

Projector-carbon. Download PDF

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Publication number
US1065141A
US1065141A US67007712A US1912670077A US1065141A US 1065141 A US1065141 A US 1065141A US 67007712 A US67007712 A US 67007712A US 1912670077 A US1912670077 A US 1912670077A US 1065141 A US1065141 A US 1065141A
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United States
Prior art keywords
carbon
projector
groove
core
kerlin
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Expired - Lifetime
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US67007712A
Inventor
John F Kerlin
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NATIONAL CARBON CO
NAT CARBON CO
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NAT CARBON CO
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Publication date
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Priority to US67007712A priority Critical patent/US1065141A/en
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Publication of US1065141A publication Critical patent/US1065141A/en
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    • 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
    • H05B31/02—Details
    • H05B31/06—Electrodes
    • H05B31/08—Carbon electrodes
    • H05B31/10—Cored carbon electrodes

Definitions

  • My mvention is therefore particularly adapted to projector carbons for moving picture machines although it can be used to advantage in any are light.
  • cored carbon 1 having a core 2, filled with are sustaining material. Throughout the length of this carbon is formed a groove 3, having a rounded bottom 4.
  • Carbons made in accordance with my in vention maintain a steady arc of unchanging position, and will not crack when baked in the electric furnace.

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  • Arc Welding In General (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
  • Carbon And Carbon Compounds (AREA)

Description

J. F. KERLIN.
PROJECTOR CARBON.
APPLIOATION FILED JAN.8,1912.
1,065,141, Patented June 17, 1913.
. WITNESSES INVENTO? ATTORNEY UNITED STATES PATENT OFFICE.
JOHN F. KERLIN, OF LAKEWOOD, OHIO. ASSIGNOR TO THE NATIONAL CARBON (30., OF CLEVELAND, OHIO, A CORPORATION OF NEW JERSEY.
PROJECTOR-CARIBON.
Specification of Letters Patent.
Patented June 1'7, 1913.
1nain stationary in one place, but moves around the end of the carbon. In ordinary street lighting this feature is not very objectionable, but in moving picture apparatus it is important to hold the arc steady .1n order to produce uniform projections.
My mvention is therefore particularly adapted to projector carbons for moving picture machines although it can be used to advantage in any are light.
I have found that if a furrow or small groove is made lengthwise of the carbon that the arc will remain approximately sta tionary. If this groove is made V shaped the carbon quite often cracks through to the core when it is baked in the furnace.
To overcome this difficulty I make the groove with a rounded bottom so that there is no sharp corner to start a crack.
In the drawing the single figure shows a.
cored carbon 1 having a core 2, filled with are sustaining material. Throughout the length of this carbon is formed a groove 3, having a rounded bottom 4.
Carbons made in accordance with my in vention maintain a steady arc of unchanging position, and will not crack when baked in the electric furnace.
While I have shown my improvement as being applied to a cored carbon it. is not limited to this type as it could be used with solid carbons or with other types.
Having described my invention, what I claim is:
An are light carbon having a core therein and a groove or furrow in the carbon extending parallel to the core, said groove or furrow having a rounded bottom whereby the carbon will not crack when baked.
In testimony whereof I have hereunto signed my name.
JOHN F. KERLIN. W'itnesses:
A. G. SUMMERELL, A. B. PYKE.
US67007712A 1912-01-08 1912-01-08 Projector-carbon. Expired - Lifetime US1065141A (en)

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US67007712A US1065141A (en) 1912-01-08 1912-01-08 Projector-carbon.

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US67007712A US1065141A (en) 1912-01-08 1912-01-08 Projector-carbon.

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US1065141A true US1065141A (en) 1913-06-17

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US67007712A Expired - Lifetime US1065141A (en) 1912-01-08 1912-01-08 Projector-carbon.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2603669A (en) * 1948-10-26 1952-07-15 Union Carbide & Carbon Corp Large electrode with thermal stress relief

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2603669A (en) * 1948-10-26 1952-07-15 Union Carbide & Carbon Corp Large electrode with thermal stress relief

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