US1575342A - Electrical transformer - Google Patents

Description

March 2 1926. "1575,342

A. A. HOWARD ELECTRICAL TRANSFORMER Filed July 9, 1925 I Qjparts broken .avvay Fig." 2 is a' view. taken "as-indicated byithe line-2 of Fig. 1, and

Patented-' lMar. i I

To iitiartay I Be it known that I, Aos rN .i W IdoivARD', 'citizlen 'of the United? States, residing at Ghica o ,{in theycounty of (look and-State of Illinois, have invented a new-and useful Improvement in "Electrical ;l-ransformers,

' of which the following is a specification.

hi inv'ention relates to improvements in hereshown the inventiOi asiembodied in a of Waves at radiofrequenc transformermsuch as is used in connection, with radio; apparatus forthe ampllfication i v o r air. The outer or SGCOIldtLI'Y'COll of Wire 14 are employed, a primary-coil and a second- '-.uy; coil. 7' These-coils are-arranged in induc tive relat on'to each other and .must be supported properly in this position. the

use of my invention I am able to do 'thismod fications.

' in a very simple manner.

ventioni ivill appear more fully. as I proceed panying drawings, Figure 1;;is a top :plan view of I complete transformer showing i ,Fig. 3Iisa' view on an enlarged-scale taken as indicated by the line'3of Fig. 1.

As shown in the draWings,:1O indicates a cylindricalv supportingmember here shown as made of insulating material such as fibre,

'bakelite, hard rubber or th-elike.

In the outer surfaceofthe member is cut a'spiral groove'll. :The'turns ofthis groove ll are spaced apartthe distance at which. it,is* desired to space the turns of i the primary coil. The groovell 'is made with adepth equal to the distance which it is desired to space .theprlmary orinner c011 fromthe secondary or'outer coil. Obviously,

the Wallof the member '10 must be of sufiicient thickness to permit the requisite depth of the groove 11 andstill' furnish sufficient.

strength to'support the Wires.

bottom of the'groove 'llgandis here shown asfloeing .either bare jvvire or insulated by enamel. Preferably theisupport'ing member In 'making @such;transformers, two, coils ELECTBI QZ L L 'rnausromvinnf. 7

atpiicationiiieaJ 11 ;9,=1925., seriar No'. 42,41 1. I

each other bythe groove 11. I Wound on the outer surface'of the supporting member 10 and covering the groove I 11 is a sheet of material 13 which is pref-.

erably insulating material such as paper or the hire.

1e indicates the Wire forming the" outer ously, the Wire may be insulated in any other manner or the turns may be separatedfrom stated; above so'tliat vvirel12'smay 'be bare-wire; and'wh'en such wireis. used the 1 turns are properly spaced andiinsulated from or'secondary'coil and this Wire is here'shownas havlngenamel insulation thereon. ObVleach other in order to be insulatedby the is WOLlIld on the sheet of paper 13, such paper preventing the turns thereof from" be understoodthat it is capable of many 7 Changes, therefore, in the construction and arrangement'may be made ,withoutdeparting' from the spirit and scope ,of the invent-ionas disclosed-inthe appended,

claims, in which it is my intentionto claimgj all novelty inherent inmy invention as broadly as pos'siblein view of the prior art.

Letters Patent, is: r

1 A deviceof the character. described com-. I i

prising a cylindrical support having a spiral groove in ltsouter surface, a ire laid 1n the bottom of said groove, the depth of said the Wire laid therein, a sheet of material on said support lying over said groove, and

another wirevvound on the outer surface of I sald sheet of material. 1 1

- 2. Adevice of he character described comprising a cylindrical support of insulating material havinga spiral groove in its outer surface, a Wire. laidinthe bottom of said 35 What'I claim as new, and desire to'secure. i

groove being greater than the diameter of groove, the I depth of saidf groove being greater than the diameter of the Wire laid therein, a sheet of insulating material on e i said support lying over said groove, and .another Wire Wound onthe outer surface of r said sheet ofinsulating material. :12" indicates the wire' formi n'g the inner or primary.v coil. Thisgwire is-QWound in the described comprising a cylindrical support having a; spiral groove in its outer surface a Wire laid in thebot'tom of said'groovqthe depth of said groove being greater' than the diamcter of the Wire laid therein, a sheet of groeiveg and. another Will-'6 haviihg 2. diameter small enough :to 'permit-jit ta (intern saidgroove, Wound n-,theqqte1: surface 01- salid sheet of material" and Prvntedfroni; 'entering' said grqove by saidg l shggt; gfi 'p -m V Q "I materia1 and prevented fromentririg sai A: deVi c f-of thQham0terudescriba comprislipg a cylindrical; supportfof insulatQ.

, ihgg materlal havingfa; spinal gltorqwe inyits'.

dute uriace u wire laid 'imithepbdttpmsof V said gmdvQ; the; depth" of said? groom;

terial U greater tham'theoffic the wire laid therein, w sheetof insulatingmaterial on said lying over said grqoveflpnd another wire; having a 'diameter small enough to permit it to ent'fsaid' groove; wound '011' the ogige nisurface bf sid sheet of insulatin' gmowa iby saidi sheet fo f' insulating material. testimony whereof- I havehereuntd set

Images