US1427324A - Process for manufacturing electric transformers of small power - Google Patents

Process for manufacturing electric transformers of small power Download PDF

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Publication number
US1427324A
US1427324A US747672A US1913747672A US1427324A US 1427324 A US1427324 A US 1427324A US 747672 A US747672 A US 747672A US 1913747672 A US1913747672 A US 1913747672A US 1427324 A US1427324 A US 1427324A
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United States
Prior art keywords
small power
electric transformers
manufacturing electric
terminals
core
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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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US747672A
Inventor
Priestley Charles Mari Edouard
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Vedovelli Priestley & Co Soc
Vedovelli Priestley & Co Ste
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Vedovelli Priestley & Co Soc
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Application filed by Vedovelli Priestley & Co Soc filed Critical Vedovelli Priestley & Co Soc
Priority to US747672A priority Critical patent/US1427324A/en
Application granted granted Critical
Publication of US1427324A publication Critical patent/US1427324A/en
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Expired - Lifetime legal-status Critical Current

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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
    • H01F41/12—Insulating of windings
    • H01F41/127—Encapsulating or impregnating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core

Definitions

  • PROCESS FOR MANUFACTURING ELECTRIC TRANSFORMERS OF SMALL POWER PROCESS FOR MANUFACTURING ELECTRIC TRANSFORMERS OF SMALL POWER.
  • This invention relates to a process of electric transformers of small power.
  • Figures 1-4 show the different stages in ⁇ the manufacture ofa transformer, and F igures 5 and 6 relate, one to a transformer with two branches, and the other to a three-phase transformer.
  • the soft iron blanks used to form the core are cut in the shape of recessed or skeleton rectangles ( Figure .1), and the said blanks are afterwards out along the line 1-2.
  • the coils ( Figure 2) are prepared in such manner as to enable them to be threaded on the members 3 of the blanks. These coils are suitably insulated from each other, and the cable ends are connected to metal terminal parts 5, 6, 7, and 8.
  • windings could be arranged on two branches, or even a threephase transformer could be obtained in that manner.
  • Figure 5 shows for instance a transformer with two branches, in which each of the said bralnches is surrounded by insulating materia
  • the high tension connections enter at 16 and 17, and the low tension connections which are not shown in the drawing, would be made at the other side.
  • Figure 6 represents a three-phase transformer in which the outlet terminals alone are shown, the high tension connections being made at 18 and 19, and the low tension connections. at the other side.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Of Coils (AREA)
  • Coils Or Transformers For Communication (AREA)

Description

r C. M. E. PBIESTLEY. PROCESS FOR MANUFACTURING ELECTRIC TRANSFORMERS OF SMALL POWER.
I APPLICATION FILED FEB. 11. I913 427 324 Patented Aug. 29, 1922.
00E ab Y I ml:
I UNITED STATES PATENT OFFICE.
CHARLES MARIE EDOUARD PRIESTLEY, OF PARIS, FRANCE, ASSIGNOR TO SOCI'ETE VEDOVELLI PRIESTLEY & (10., 0F PARIS, FRANCE.
PROCESS FOR MANUFACTURING ELECTRIC TRANSFORMERS OF SMALL POWER.
Specification of Letters Patent. Patented Aug. 29 i922 Application filed February 11, 1913. Serial No. 747,672.
invented a new and useful Process for Manufacturing Electric Transformers of Small Power, which invention is fully set forth in the following specification.
This invention relates to a process of electric transformers of small power.
In order to make the explanation as clearas possible, the accompanying drawings illustrate, by way of example, transformers obtained by the process according to this invention.
Figures 1-4 show the different stages in \the manufacture ofa transformer, and F igures 5 and 6 relate, one to a transformer with two branches, and the other to a three-phase transformer. I
The soft iron blanks used to form the core are cut in the shape of recessed or skeleton rectangles (Figure .1), and the said blanks are afterwards out along the line 1-2.
The coils (Figure 2) are prepared in such manner as to enable them to be threaded on the members 3 of the blanks. These coils are suitably insulated from each other, and the cable ends are connected to metal terminal parts 5, 6, 7, and 8.
' pressed between the two metal sections of The various elements described having been thus constituted, the thin sheet metal blanks are introduced into the interior of the coil, the edges of the cuts being separated, and the said cuts being successively alternated so as to be opposite each other. This having been done, a structure is obtained having the appearance shown in full lines in Figure 3. The coils and the mass of soft iron constituting the core are then eom shown in Figure 4 is obtained, only the member 14 of the core and the terminals 5, 6, 7 and 8 emerging from the solidified mass. Obviously when the difference of tension be tween the two windings has to be large, the terminals 5, 6, 7 and 8 could be arranged at a suitable distance apart, and the place where the terminals emerge, would be provided with lines or fluted so as to. avoid losses:
through the surface. s
'It will be seen that in the process described the mass of soft iron ,is held in the proper position entirely by the insulating material, and does not require anyscrews or bolts.
Obviously instead of arranging the winding on a single branch, the windings could be arranged on two branches, or even a threephase transformer could be obtained in that manner.
Figure 5 shows for instance a transformer with two branches, in which each of the said bralnches is surrounded by insulating materia The high tension connections enter at 16 and 17, and the low tension connections which are not shown in the drawing, would be made at the other side.
Figure 6 represents a three-phase transformer in which the outlet terminals alone are shown, the high tension connections being made at 18 and 19, and the low tension connections. at the other side.
What I claim as my invention and desire to secure by Letters Patent isfz A process of manufacturing electromagnets consisting in disposing the coils, terminals and core of the magnet within a mold, with the core and terminals projecting partly beyond the interior surface of the mold, injecting molten insulating material into the mold under pressure, so as to completely fill the interior thereof and thereby surround the coils and the portions of the core and terminals Within said interior; and maintaining the pressure on the injected material during solidification, whereby said coils, core and terminals are mechanically joined together by the" solidified mass.
CHARLES MARIE EDOUARD PRIESTLEY. Witnesses:
EMILE Lemmas, HANSON C. Coxn.
US747672A 1913-02-11 1913-02-11 Process for manufacturing electric transformers of small power Expired - Lifetime US1427324A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478633A (en) * 1946-03-19 1949-08-09 Gen Electric Electric coil
US2572590A (en) * 1946-12-30 1951-10-23 Lumalampan Ab Insulation embedded ballast unit
US2574417A (en) * 1949-05-28 1951-11-06 Gen Electric Clamp improvement
US2579560A (en) * 1948-08-19 1951-12-25 Westinghouse Electric Corp Bonded magnetic core structure
US2710929A (en) * 1951-01-18 1955-06-14 Russell E Phelon Magneto
US2801393A (en) * 1954-04-16 1957-07-30 Leonard Electric Products Corp High voltage and deflection transformers
US2819444A (en) * 1953-12-18 1958-01-07 Westinghouse Brake & Signal Magnetic discriminator
US2856639A (en) * 1953-04-13 1958-10-21 Bernard F Forrest Method of encasing electric coils
US2887763A (en) * 1949-07-07 1959-05-26 Benjamin L Snavely Assembly molding process for electrical elements
US2925570A (en) * 1954-08-12 1960-02-16 Strock Howard Eugene Current transformer
US2978659A (en) * 1958-01-24 1961-04-04 Electro Engineering Works Moisture-proof winding
US3240848A (en) * 1961-07-11 1966-03-15 Gen Electric Canada Method of making encapsulated transformers containing a dielectric gas

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478633A (en) * 1946-03-19 1949-08-09 Gen Electric Electric coil
US2572590A (en) * 1946-12-30 1951-10-23 Lumalampan Ab Insulation embedded ballast unit
US2579560A (en) * 1948-08-19 1951-12-25 Westinghouse Electric Corp Bonded magnetic core structure
US2574417A (en) * 1949-05-28 1951-11-06 Gen Electric Clamp improvement
US2887763A (en) * 1949-07-07 1959-05-26 Benjamin L Snavely Assembly molding process for electrical elements
US2710929A (en) * 1951-01-18 1955-06-14 Russell E Phelon Magneto
US2856639A (en) * 1953-04-13 1958-10-21 Bernard F Forrest Method of encasing electric coils
US2819444A (en) * 1953-12-18 1958-01-07 Westinghouse Brake & Signal Magnetic discriminator
US2801393A (en) * 1954-04-16 1957-07-30 Leonard Electric Products Corp High voltage and deflection transformers
US2925570A (en) * 1954-08-12 1960-02-16 Strock Howard Eugene Current transformer
US2978659A (en) * 1958-01-24 1961-04-04 Electro Engineering Works Moisture-proof winding
US3240848A (en) * 1961-07-11 1966-03-15 Gen Electric Canada Method of making encapsulated transformers containing a dielectric gas

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