US714226A - Coil for arc-lamps. - Google Patents

Coil for arc-lamps. Download PDF

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Publication number
US714226A
US714226A US10543602A US1902105436A US714226A US 714226 A US714226 A US 714226A US 10543602 A US10543602 A US 10543602A US 1902105436 A US1902105436 A US 1902105436A US 714226 A US714226 A US 714226A
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coil
arc
lamps
asbestos
twine
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Expired - Lifetime
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US10543602A
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William H Northall
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/098—Mandrels; Formers

Definitions

  • WITNESSES 8 //v VENTOH W W 6 William H.North.11 By a I m THE unnms PETERS co. mo'roun-mu wnsm mcm, n. c.
  • LWILLIAM H. NORTHALL a citizen of the United States, residing at Elwood, in the county of Madison and State of Indiana, have invented certain new and useful Improvements in Coils for Arc-Lamps, of which the following is a specification.
  • the object of my present invention is to produce a magnet-coil the wire of the winding of which is insulated by a covering of asbestos, said asbestos being formed into a string which is wrapped about the wire.
  • Figure 1 is a perspective view of an arclamp coil constructed in accordance with my invention.
  • Fig. 2 is a side elevation of a wire insulated in accordance with my invention.
  • Fig. 3 is a similar view of a slightlymodified form, the insulation in this case consisting of a twine or thread composed of a central core of asbestos fiber and an external wrapping of linen or other long-fiber strands, which, however, form but a very small percentage of the total.
  • 5 indicates an electrical conductor to be used for the winding of a coil, and this conductor is covered by the wrapping of asbestos twine 6, which is preferably formed of a plurality of strands, as
  • the entire coil may be brought to a red heat without causing short-circuiting even though the insulation be of the form shown in Fig. 3, for the reason that the vegetable fiber, though becoming charred, forms so small a percentage of the total as not to interfere with the insulation.
  • a coil for arc-lamps in which the wire of the winding is insulated by a wrapping consisting of a twine formed of a central core of asbestos and an external wrapping of longfiber twine which forms a comparatively small percentage of the whole.
  • An insulator for wire consisting of a twine formed of asbestos and a small proportion of tough long fiber incorporated therewith, which may be wrapped about the wire.
  • An insulator for wire consisting of a twine formed of a central core of asbestos, and an external binder consisting of longfiber vegetable twine which forms butasmall percentage of the whole.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Organic Insulating Materials (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Description

N9. 7l4,226. Y P'a tented-Nov. 25', I902.
W. H. NURTHALL.
COIL FOR ABC LAMPS.
(Application filed May 1, 1902.)
(No Model.)
WITNESSES: 8 //v VENTOH W W 6 William H.North.11 By a I m THE unnms PETERS co. mo'roun-mu wnsm mcm, n. c.
UNITED STATES PATENT OFFICE.
WILLIAM H. NORTHALL, OF ELl/VOOD, INDIANA.
COIL FOR ARC-LAM PS.
SPECIFICATION forming part of Letters Patent No. 714,226, dated November 25, 1902.
Application filed May 1, 1902. Serial No. 105,436. (No model.)
To all; whom, it may concern-.-
Be it known that LWILLIAM H. NORTHALL, a citizen of the United States, residing at Elwood, in the county of Madison and State of Indiana, have invented certain new and useful Improvements in Coils for Arc-Lamps, of which the following is a specification.
There are in many electrical appliances constructions where a magnet-coil is subjected to considerable external heat, and as a result after long-continued use the insulation, ordinarily composed of cotton or linen fiber, becomes charred, so as to result in a short circuit. This is especially true of the coils used in arc-lamps, and great difficulty has heretofore been experienced by reason of the short-circuiting of such coils because of the charring of the insulation, resulting from the long-continued heat of the arc. I am well aware that asbestos is well known as an insulating substance; but so far as I am aware it has always heretofore been used in sheet form or loosely-packed fiber and has never been used as an insulating-covering for wire.
The object of my present invention, therefore, is to produce a magnet-coil the wire of the winding of which is insulated by a covering of asbestos, said asbestos being formed into a string which is wrapped about the wire.
The accompanying drawings illustrate my invention.
Figure 1 is a perspective view of an arclamp coil constructed in accordance with my invention. Fig. 2 is a side elevation of a wire insulated in accordance with my invention. Fig. 3 is a similar view of a slightlymodified form, the insulation in this case consisting of a twine or thread composed of a central core of asbestos fiber and an external wrapping of linen or other long-fiber strands, which, however, form but a very small percentage of the total.
In the drawings, 5 indicates an electrical conductor to be used for the winding of a coil, and this conductor is covered by the wrapping of asbestos twine 6, which is preferably formed of a plurality of strands, as
may be used indefinitely without charring and without shortcircuiting. The entire coil may also be brought to a red heat without causing short-circuiting even though the insulation be of the form shown in Fig. 3, for the reason that the vegetable fiber, though becoming charred, forms so small a percentage of the total as not to interfere with the insulation.
I claim as my invention 1. A coil for arc-lamps in which the wirewinding is insulated by a wrapping of asbestos twine composed of fibrous asbestos and a small proportion of tough long fiber.
2. A coil for arc-lamps in which the wire of the winding is insulated by a wrapping consisting of a twine formed of a central core of asbestos and an external wrapping of longfiber twine which forms a comparatively small percentage of the whole.
3. An insulator for wire consisting of a twine formed of asbestos and a small proportion of tough long fiber incorporated therewith, which may be wrapped about the wire.
4. An insulator for wire consisting of a twine formed of a central core of asbestos, and an external binder consisting of longfiber vegetable twine which forms butasmall percentage of the whole.
In witness whereof I have hereunto set my hand and seal, at Elwood, Indiana, this 2d day of April, A. D. 1902.
WILLIAM H. NOR'IHALL. LL. 8.]
Witnesses:
JACOB Looms, A. L. HAPPER.
US10543602A 1902-05-01 1902-05-01 Coil for arc-lamps. Expired - Lifetime US714226A (en)

Priority Applications (1)

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US10543602A US714226A (en) 1902-05-01 1902-05-01 Coil for arc-lamps.

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US10543602A US714226A (en) 1902-05-01 1902-05-01 Coil for arc-lamps.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484212A (en) * 1945-07-20 1949-10-11 Westinghouse Electric Corp Magnet coil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484212A (en) * 1945-07-20 1949-10-11 Westinghouse Electric Corp Magnet coil

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