US836863A - Process of making electric condensers. - Google Patents

Description

PATENTED NOV. 27,}906.

H. P. GLAUSEN. PROCESS OF MAKING ELECTRIC GONDENSERS.

APPLICATION FILED FEB. 2, 1903.

' UNITED sTATEs- PATENT FEICE.

HENRY P. CLAUSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO AMERICAN ELECTRIC TELEPHONE COMPANY, or CHICAGO, ILLINOIS, A COR- PORATION.

PROCESS OF MAKING ELECTF IIC CONDENSEFIS- No. ssasesl Specification of Letters Patent.

' Patented Nov. 27, 1906.

Application filed February 2, 1908. Serial No- 141;460.

To all whom it may concern:

fication.

A common form of electric 'cohdenser consists of a flattened roll composed of a plurality of thin metal sheets or stri' s, with interposed strips or sheets of die ectric. Ordinarily the metal strips which form or constitute the plates of the condenser are of metal foilsuch, for example, as tin-foilwhile the interposed sheets of dlele'ctric may consist of parafined paper or other like non-Conducting material, and, as stated, the metal 7 and dielectric thus rolled together in alternate layers ispreferably subjected to pressure after the roll has been removed from the apparatus, and this flattened mass of metal and dielectric after being subjected to any further desired treatment and after being suitably incased or mounted then constitutes the completed article. Condensers of this character are employed in great numbers, particularly in telephone systems, and

it is consequently necessary, or at least deslrable, that the cost of manufacturing these condensers be reduced as much as possible, and while a cheap article isdesirable it must also be of an efiiclent and reliable character.

Generally stated, the object of my inven- 1m rovement tendmgto increase the genera efiiciency of a process of. this particular character.

To the foregoing and other useful ends my inventionconsists in matters hereinafter set forth and claimed;

In the accompanying drawings, Figure 1 is .a diagram illustrating the first step in my improved process for making electric condensers. ig. 2 is a diagram illustrating the second step of the said process. Fig. 3 111118- tratesanother ste in said process. Fig. 4 1s a perspective 0 the completed condenser before it 1s incased or mounted.

As thus illustrated my improved process for making condensers is of a character which insures the production of a bi h-class article at acompa'ratively low cost 0 manufacture and which I find to be very satisfactor and efficient in practice.

referably and preparatory to the first step a single sheet or stri of thin metal 1 is supported in the form 0 the roll 2, while a couple of strips or sheets of paper 3 and 4 are mounted in the form of similar rolls, as-

shown at 5 and 6. With this arrangement the sheet of metal is between two sheets of paper or dielectric, and the three end portions are then brought together and passed over the supporting-roll 7. After this the three-ply or composite sheet of metal and dielectric is then brought under the roll 8 and thence upwardly over the other supporting-roll 9 and is then led to the windin in roll 10. The roll 8 is, it will be observe preferably supported in a receptacle 11, which may contain boiling araffin or other like substance. ThuswhenterolllOiso erated and the paper and metal cause to travel in the direction indicated by the arrow, the three-ply or composite sheet is compelled to pass around the roll 8 and through the hot paraffin and thence upwardly over the roll 9. Upon passin over the roll 7 the sheets of paper or,metal o,-not of course, adhere to eac other; but upon emergin from the paraffin the-three sheets are founc? to be adhering tightlyto each'other, and this adhesive action is increased by causing the paper and metal to then pass over the roll 9, and, furthermore, this roll 9 serves to very efiectually'expel the air from any air-bubbles that may at such time exist between the metal and paper. Consequently when the paper and metal reaches the roll 10 it is then in the form of a single three-ply or composite sheet composed of two sheets of paraffined paper with an interposed sheet or stri of Inetalsuch, for example, as tinfoil. Two rolls of these three-ply or composite strips are then arranged together, substantially as shown in Fig. 2, and the three-ply or composite strips from each roll are then brought together and led over the winding-in roll 12. Upon this latter roll the two composite strips are wound tightly together in the form of a cylindric bundle or roll. When this bundle or roll is of the proper size or of the proper number of turns, it is then removed and subjected to pressure, so as to flatten it into the form shown in Fig. 4. These flattened condenser-rolls can then be subjectedjo a further waterproofing action, so as to make them absolutely air-tight and damp-proofas, for example, by placing them in a receptacle 13 containing heated or boiling paraffin. After this the flattened condenser-rolls are then ready for any further desired or necessary treatment preparatory to mountin or incasing them, as will be readily understood without further description or explanation.

What I claim as my invention is- 1'. The process of making electric condensers, which involves as steps, the drawing of two strips of aper and an interposed strip of metal throug a liquid consistin of heated paraffin, so as to reduce the said s ieet material to a three-ply or composite strip, and

then rolling together two of said three-ply or composite strips, the said sheets or strips of material being held apart at a point or points in their path of travel before enteringlthe liquid, but held flatwise against each other just before and at all times subsequent to'entering the li uid, whereby the non-adhering surfaces of t 1e sheets or strips at a point or points intheir path of travel before they enter the liquid are caused to adhere to each other u on and after passing therethrough.

2. T e process 0 making. electric condensers, which consists in causing two sheets of dielectric and an interposed sheet of metal to pass through a li uid consistin of heated paraflin, so as to re uce the said s eet material to a three-ply or composite strip, rolling together two of said composite strips, flattening the roll thus formed, and then immersing the flattened roll in heated paraffin, the said sheets or strips of material being held apart at a point or points in their ath of travel before entering the liquid, but eld flatwise against each other just before and-at all times subsequent to enterin the liquid, whereby the non-adhering su aces of the sheets or strips at a point or points in their path of travel before they enter the liquid are caused to adhere to each other upon and assing therethrough.

.he process of making condensers, which consists in bringing together two strips of dielectric having a metal strip therebe tween, the passing of said three-ply strip after 'over a roll whereby said plies are held securely together, the passing of said strips through a bath of heated insulating material, the rollin of two of said three-ply strips into a composite roll, the flattening of said roll, and the subjecting of said roll to an immersion in a bath of insulating material.

4. The rocess of making condensers, which consists in bringing together two strips of dielectric having a metal strip therebetween, the passing of said three-ply strip over a roll whereby said plies are held securely together, the passing'of said strips through a bath of heated paraffin, the rolling of two of said three-ply strips into a composite roll, the flattening of said roll, and the subjecting of said roll to an immersion in a paraffin-bath.

Signed by me at Chicago, Cook county, Illinois, this 23d day of January, 1903.

HENRY P. CLAUSEN. Witnesses:

WM. A. HARDERS,

I'IARRY P. BAUMGARTNER.

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