US1501787A - Electromagnet - Google Patents

Electromagnet Download PDF

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Publication number
US1501787A
US1501787A US512603A US51260321A US1501787A US 1501787 A US1501787 A US 1501787A US 512603 A US512603 A US 512603A US 51260321 A US51260321 A US 51260321A US 1501787 A US1501787 A US 1501787A
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United States
Prior art keywords
wire
layers
wires
core
magnet
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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 - Lifetime
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US512603A
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English (en)
Inventor
Lacy Howard
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Individual
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Individual
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Publication date
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Publication of US1501787A publication Critical patent/US1501787A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06C—DIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C11/00—Output mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets

Definitions

  • This invention relates to electro-magnets of the type referred to in United States Letters Patent No. 928,136, which discloses a construction wherein an electro-magnet is formed by winding about a. core (composed of a bundle of soft iron wires clamped at the ends by washers) superimposed groups of even numbers of layers of wire whereof the diameter of the wire composing each successive group diminishes progressively and the number of layers in each successive group increases in direct arithmetical pro gression from the core outwardly, insulating material being interposed between the core and the adjacent winding and between successive layers of the series, the direction of winding being reversed at the end of every second layer, and the free ends of the wire composing each group being brought out at the same end of the magnet for the purpose of being connected up in accordance with certain desired combinations.
  • the object of the present invention is to provide an improved form of winding which makes it possible to operate the electromagnet over a greater range of voltage and amperage than was formerly possible.
  • an electromagnet iswound with an even number of superimposed pairs of layers of wire where of the gauge of the wire composing each successive pair of layers diminishes progressively outwardly of the core and the direction of winding for each pair of layers is reversed, insulation being placed between successive layers, and the beginning and end of each wire is brought out at the tail end of the magnet.
  • each size comprising two layers and each two layers being oppositely wound.
  • Figure 1 is a cross-section of one leg of a magnet embodying the invention and Figure 2 is a plan view, partially in section, of a portion of said leg.
  • A is the core which is composed of a bundle of soft iron wires having at each end a Washer or spreader B compressed thereon for the purpose of holding the wires firmly in position, and having also at each end a disc 0 of insulating material fitted thereover in order to support the windings; the diameter of each spreader B being twice the diameter of the core, as already provided for in prior United States Letters Patent No. 928,136.
  • the yoke which is not illustrated in the drawings, should be equal in size in square inches to one half the length of the core, and should be equal in width to the diameter of the Spreaders B upon which said yoke is placed at the tail of the core.
  • the core is then thoroughl insulated.
  • a wire a 0 say No. 14 gauge is then wound upon core A in a clockwise direction and is continued until two layers have been completed, insulation being placed between each la er.
  • the beginning (L1 and the end a? of the wire a are both brought out at the tail end of the magnet.
  • a wire Z), of say 15 gauge is then wound, in a counter-clockwise direction, upon the second layer of wire and is insulated from the latter, and when one layer of wire I) has been completed this is insulated and a second layer of the wire I), also wound counter-clockwise, is applied, the beginning 6 and the end 6 being brought out at the tail end of the magnet.
  • the outer layer of wire I) is insulated and a wire 0, of say No. 16 gauge, is wound thereon in a clockwise direction, insulation being applied when one layer has been completed, and a second layer of wire 0 is agaln wound in a clockwise direction; the begin- 11 wire f, of say ning c and the end 0 of wire 0 being brought out at the tail end of th magnet.
  • a wire (L of say NO. 17 gauge, is then wound thereon in a counter-clockwise direction, two layers insulated from one another being applied, and the beginning 65 and the end (Z being both brought out at the tail end of the magnet.
  • WVith this form of (consisting of a pair of layers, both of which are wound in the same direction around the core.) functions with its next adjacent wire (correspondingly consisting of a pair of layers wound around the core in the opposite direction to the preceding pair), and the inductance, turn for turn, balances; but since successive wires decrease in size from the core outwardly, there is a progressively increasing surplus of ampere-turns per wire from the second wire outwardly. and therefore an increasing inductive effect, as the result of which with every combination of the wires, effective ampere-turns are available.
  • the inductance is weakest when all the different sized wires are connected in series and strongest when all are connected in multiple, all wires being always in circuit in every combination.
  • An electro-magnet of the type described comprising a core and a winding composed of an even number of differently sized wires each wound in two layers in the same direction and with the direction of winding of successive wires reversed, said wires decreasing in size progressively in accordance with th ampere-turns required per wire, and insulation between all layers of the winding, whereby said wires are adapted to function in pairs to produce a variable inductance, tie value of which may be controlled by inter-connecting the wires to form different combinations.
  • An electro-magnet of the type described comprising a core, a winding, con sisting of an even number of differently sized. wires each wound in two layers both in the same direction, the winding of successive wires being reversed, said wires decreasing in diameter progressively outward and consisting of numbers of turns as the distance from the core increases, and insulation between the layers, the ends of said wires being adapted to be connected in various combinations for producing different valuations of induction in the core.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Electromagnets (AREA)
US512603A 1921-07-22 1921-11-03 Electromagnet Expired - Lifetime US1501787A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19738/21A GB189174A (en) 1921-07-22 1921-07-22 Improvements in electro-magnets

Publications (1)

Publication Number Publication Date
US1501787A true US1501787A (en) 1924-07-15

Family

ID=10134367

Family Applications (1)

Application Number Title Priority Date Filing Date
US512603A Expired - Lifetime US1501787A (en) 1921-07-22 1921-11-03 Electromagnet

Country Status (4)

Country Link
US (1) US1501787A (de)
DE (1) DE424674C (de)
FR (2) FR550357A (de)
GB (1) GB189174A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2461230A (en) * 1946-09-04 1949-02-08 Rca Corp Deflecting coil
US2488325A (en) * 1947-06-25 1949-11-15 Bell Telephone Labor Inc Electrical winding
US2559824A (en) * 1947-11-12 1951-07-10 George H Leland Method of winding layer wound magnet coils
US3304599A (en) * 1965-03-30 1967-02-21 Teletype Corp Method of manufacturing an electromagnet having a u-shaped core

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8305303D0 (en) * 1983-02-25 1983-03-30 Picker Int Ltd Magnets
US4536728A (en) * 1983-10-03 1985-08-20 International Telephone & Telegraph Corp. Valve solenoid windings
DE3908350A1 (de) * 1989-03-15 1990-09-20 Asea Brown Boveri Elektrische spule

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2461230A (en) * 1946-09-04 1949-02-08 Rca Corp Deflecting coil
US2488325A (en) * 1947-06-25 1949-11-15 Bell Telephone Labor Inc Electrical winding
US2559824A (en) * 1947-11-12 1951-07-10 George H Leland Method of winding layer wound magnet coils
US3304599A (en) * 1965-03-30 1967-02-21 Teletype Corp Method of manufacturing an electromagnet having a u-shaped core

Also Published As

Publication number Publication date
GB189174A (en) 1922-11-22
DE424674C (de) 1926-02-02
FR550351A (fr) 1923-03-05
FR550357A (fr) 1923-03-05

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