US1630693A - Transformer - Google Patents

Transformer Download PDF

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Publication number
US1630693A
US1630693A US716168A US71616824A US1630693A US 1630693 A US1630693 A US 1630693A US 716168 A US716168 A US 716168A US 71616824 A US71616824 A US 71616824A US 1630693 A US1630693 A US 1630693A
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United States
Prior art keywords
casing
transformer
base
coils
tube
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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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US716168A
Inventor
Ernest G Danielson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
E T CUNNINGHAM
Original Assignee
E T CUNNINGHAM
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Publication date
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Priority to US716168A priority Critical patent/US1630693A/en
Application granted granted Critical
Publication of US1630693A publication Critical patent/US1630693A/en
Anticipated expiration legal-status Critical
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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/027—Casings specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards

Definitions

  • This invention relates to a transformer of high frequency currents, and more particularly to the housingof such coils.
  • radio frequency transformer tha-t is inexpensive in construction and neat in appearance.
  • Figure '1 is a main sectional view of a radio frequency transformer embodying my invention: and i I Fig. 2 is another sectional View, taken along plane 2-2 of Fig.1.
  • the elements of the transformer consist of coaXially arranged coils 11. which may be connected in any appropriate manner to form primary or secondary windings, or even a single winding if desired.
  • a core 12 of magnetic material is disposed so as to extend through all'of the coils 11 and independently support the same, and is shown as formed of a bundle of fine wires extending along the length of the coils.
  • a base member 13 preferably of molded insulation material
  • any appropriate fastening means may be provided, such as a dowel pin 20 that passes through the wall of casing 17 and engages the base 13.
  • this casing is also made from insulation material.
  • the top part of casing 17 has embedded therein the bottom portions of a plurality of metallic binding posts 21. These posts are each provided with a longitudinal aperture 22 in which the leads from the coils 11 may be soldered. Appropriately formed bosses 23 are shown on casing 17 to thicken the material where the binding posts 21 are attached; furthermore, as is usual, washers 24. and thumb nuts 25 are provided for facilitating electrical connection to an ex ternal circuit.
  • a transformer having a circular, flanged base of molded insulation material, a hollow tube coaxial With the base and extending therefrom said tube being formed integrally with the ha'se, a core located within the tube, coils imlepemlei'itly supported around the tube, a casing of molded insulation material, :1 (-ylindricnl inner surfm-e vcooper-biting with the circular base, andtelescoping thereover, means for fastening the base ancl casing to. getl' er, and binding posts carried by the casing.

Description

F 630, 93 May 1927' E. G. DANHELON 6 TRANSFORMER Filed y 27. 1924 FIE I.
A? /&
FIE-E.
Patented May 31,1921.
. UNITED STATES PATENT OFFICE. A
ERN EST G. DANIELSON, OF .SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO E. T. CUN- NINGHAM, OF SAN FRANCISCO, CALIFORNIA.
\ TRANSFORMER.
Application filed May 27, 1924. Serial No. 716,168.
This invention relates to a transformer of high frequency currents, and more particularly to the housingof such coils.
It is one of the objects of my invention to 6 provide a. radio frequency transformer tha-t is inexpensive in construction and neat in appearance.
It is another object of my invention to construct a radio frequency transformer with 10 comparatively few parts to assemble, especially as regards the housing or casing.
My invention possesses other advantageous features, some of which, with the foregoing, will be set forth at length in the following description, where I shall outline in full thatform of the invention which I have selected for illustration in'the drawings accompanying and forming part of the present application. Although I have shown in the drawingsbut one form of my invention I do not desire to be limited thereto, since the invention as expressed in the claim may be embodied in other forms also.
Referring to the drawings:
Figure '1 is a main sectional view of a radio frequency transformer embodying my invention: and i I Fig. 2 is another sectional View, taken along plane 2-2 of Fig.1.
In the'present instance, the elements of the transformer consist of coaXially arranged coils 11. which may be connected in any appropriate manner to form primary or secondary windings, or even a single winding if desired. A core 12 of magnetic material is disposed so as to extend through all'of the coils 11 and independently support the same, and is shown as formed of a bundle of fine wires extending along the length of the coils.
One of the features of my invention resides in the manner in which the core 12 and the coils 11 are supported. A base member 13, preferably of molded insulation material,
such as bakelite, has formed integrally therewithfa tube 14, into which the core 12 is placed. The cylindrical base 13 thus serves as a pedestal for a vertically disposed core support, which is coaxial with the base and extends upwardly therefrom. The coils 11 pass over the outsideof the tube 14, and are fastened in any appropriate manner the'reon, as by'the provision of a snug fit between them, or'if necessary by the aid of an adhesive. It must of course be remembered that transformers such as those illustrated are of very small sizecomparable with the size of the figures in the drawingso that no problem exists as regards mechanical stresses or the like. Furthermore, the wire used 111 coils 11 is of correspondingly fine calibre.
. former. This 'casing'sl'ips over the base 13,
as illustrated in Fig. 1, so as to embrace the base quite closely. A'square flange 18 or the like permits the provision of several apertures 19 for fastening the entire device to any appropriate support. To maintain the casing 17 H1 fixed relation to. the base 13, any appropriate fastening means may be provided, such as a dowel pin 20 that passes through the wall of casing 17 and engages the base 13. Preferably this casing is also made from insulation material.
The top part of casing 17 has embedded therein the bottom portions of a plurality of metallic binding posts 21. These posts are each provided with a longitudinal aperture 22 in which the leads from the coils 11 may be soldered. Appropriately formed bosses 23 are shown on casing 17 to thicken the material where the binding posts 21 are attached; furthermore, as is usual, washers 24. and thumb nuts 25 are provided for facilitating electrical connection to an ex ternal circuit.
The entire coil structure presents a smooth and pleasing appearance, which is due in a great measure to the use of the smoothly rounded casing 17 I claim:
A transformer having a circular, flanged base of molded insulation material, a hollow tube coaxial With the base and extending therefrom said tube being formed integrally with the ha'se, a core located within the tube, coils imlepemlei'itly supported around the tube, a casing of molded insulation material, :1 (-ylindricnl inner surfm-e vcooper-biting with the circular base, andtelescoping thereover, means for fastening the base ancl casing to. getl' er, and binding posts carried by the casing.
In testimony whereof, I have hereunto set ERNEST G. DANIELSON.
my hand.
US716168A 1924-05-27 1924-05-27 Transformer Expired - Lifetime US1630693A (en)

Priority Applications (1)

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US716168A US1630693A (en) 1924-05-27 1924-05-27 Transformer

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