US688915A - Induction-coil. - Google Patents

Description

No, 688,9l5. Patented nec. I7, |9ol. y

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INDUCTIUN COIL.

(Application led Mar. 28, 1901.)

(No Modal.)

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UNITED STATES j PATENT OFFICE..

lDAVID H. WILSON, OF CHICAGO, ILLINOIS.

INDUCTION-COIL.

SPECIFICATION forming part of Letters Patent No. 688,915, dated December 17, 1901.

' Application tiled March 28, 1901. Serial No. 53,270. (No model.)

fo all whom, it may concern.-

Be it known that I, DAVID H. WILSON, va citizen of the United States, residing at-Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in`Induction-Coils,of which the following is a specification.

Myinvention relates to induction-coils, and has for its object to provide a new and improved induction-coil particularly adapted to be used in connection With telephone systems.

`tionon line 2 2, `ig. 1.

v completely surrounded by and sealed up in a non-conducting box or a box of non-magnetic material.

In order to make my invention clear,I have illustrated a particular form or construction; but it is of course evident that the form, construction, and arrangement of the'parts may be greatly varied.

As illustrated in the drawings, I provide a box A of some suitable non-magnetic material. This box may be made in anydesired manner, and the parts may be assembled'in any Way desired. As herein shown, the box consists of two end plates B, connected Vtogether by the side pieces C and the bottom piece D, said latter pieces being preferably integral with. the end plates. The box is iilled with a series of small bars or pieces or Wires' of magnetic material E, which forms the laminated core of the induction-coil, and a cover Fis provided, which seals the box, preferably hermetically. The end plates B preferably project beyond the exterior surface of the box-that is, the top, sides, and bottom-and serve to hold the coils in position. The pri- 5o mary and secondary coils G and H are wound about the box, as shown, and are connected to suitable binding-posts I and J. I prefer to form the coreof a series of short pieces, so that the length of the core Will be much less than the width. The several pieces constituting the laminated core are simply filled into the box in making the device, and when the box is full the lid is placed in position and preferably sealed,v so as to form a tight compartment.

I have found that when-this construction is used to make coils for telphone systems I can obtain results which greatly exceed the results obtainable from .the vordinary induction-coils used for this'purpose. Y

vI claim- 1. VAn induction-coil, comprising a box of non-magnetic material, a series of comparatively short pieces of Ymagnetic material contained in said box and forming a laminated core, said pieces of magnetic kmaterial running substantially parallel to the short dimension of the box and a primary and secondary coil Wound about said box.

2. An induction-coil, comprising a laminated core consisting of aseries of pieces of magnetic material, a holding or receiving device therefor, having end pieces or plates of nonrnagnetic material against which the ends of the pieces which form the core abut, the distance between the end plates forming the .short dimension of the box and a primary and secondary coil wound yabout said core.

3. Aninduction-coil, comprising a box of non -magnetic material, a series of pieces of magnetic material contained therein andv forming-a laminated core, the ends of said pieces abutting against the ends of the box, said ends formed of plates which project past the exterior boundary of the box, and a primaryy and secondary coil Wound Within the space formed by said projecting ends.

DAVID II. WILSON.

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