US2790607A

US2790607A - Method of and apparatus for winding condensers

Info

Publication number: US2790607A
Application number: US429144A
Authority: US
Inventors: Dale R Clemons
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1954-05-12
Filing date: 1954-05-12
Publication date: 1957-04-30
Anticipated expiration: 1974-04-30

Description

April 30, 1957 CLEMQNS 2,790,607

METHOD OF AND APPARATUS FOR WINDING CONDENSERS Filed May 12, 1954 2 Sheets-Sheet l ATTORNEY April 30, 1957 D. R. CLEMONS 2,790,607

METHOD OF AND APPARATUS FOR WINDING CONDENSERS Filed May 12, 1954 2 Sheets-Sheet 2 w vs/v 70R THERMOPLASTIC D. 1?. 62511401149 ADHESIVE Arrafilvf METHOD OF APPARATUS FOR WINDING CONDENSERS Application May 12, 1954, Serial No. 429,144

8 Claims. (Cl. 242-65 This invention relates to methods of and apparatus for winding condensers, and more particularly to methods of and apparatus for winding compact condensers.

An object of the invention is to provide new and improved methods of and apparatus for winding condensers.

Another object of the invention is to provide methods of and apparatus for winding very small condensers.

A further object of the invention is to provide methods of and apparatus for winding condensers having substantially no hollow spaces therein.

In a method and an apparatus illustrating certain features of the invention, a pair of wires are positioned parallelly on the ends of strips to be wound into a condenser and the strips are secured to the wires. The wires then are revolved as a unit to wind the strips thereon and are subsequently withdrawn from the Wound condenser.

In a method and an apparatus illustrating the invention more specifically, a pair of fine wires are extended parallelly between two clamps and the clamps are re-' volved to wind condenser-forming strips on the wires. One of the pairs of clamps is mounted on a head which also supports a pair of supply reels for the wires, and the other pair of clamps is mounted on a second head rotatable in unison with the first head. The second pair of clamps is spring-biased to hold the wires taut between two pairs of clamps, and is mounted pivotally so that the tensions on the two wires are equalized.

A complete understanding of the invention may be obtained from the following detailed description of methods and apparatus forming specific embodiments thereof, when read in conjunction with the appended drawings, in which Fig. l is a fragmentary, partially sectional, front elevation of an apparatus for practicing one method embodying the invention;

Fig. 2 is an enlarged fragmentary, vertical section taken along line 2-2 of Fig. 1;

Fig. 3 is an enlarged fragmentary, vertical section taken along line 33 of Fig. 1;

Fig. 4 is an enlarged fragmentary, vertical section taken along line 44 of Fig. 1;

Fig. 5 is a fragmentary, partially sectional View of an apparatus forming a second embodiment of the invention;

Fig. 6 is a fragmentary vertical section taken along line 6-6 of Fig. 5; and

Fig. 7 is a fragmentary perspective view of a portion of a pair of metallizecl strips from which the condensers are wound showing thermoplastic adhesive applied to the end portions thereof.

Referring now in detail to the drawings, there is shown therein an apparatus for winding on extremely small cores insulating paper strips 10 and 11 (Fig. 1) having the inner faces thereof metallized so that the resulting condensers are as small as possible. The apparatus includes

clamping heads

12 and 13 rotatably mounted in radial and thrust bearings 14. Anti-backlash gearing 15 and 16 driven by a drive shaft 17 rotates rates Patent Patented Apr. 30, 1957

trunnions

21 and 22 to which a rigid housing 23 is fixed.

Braked

supply reels

27 and 28 mounted on supply stands 29 carry supplies of

wires

30 and 31 which extend between a manually operable clamp 34 mounted on a bracket 33 and through the trunnions 22 and adjustable,

keying guides

35 and 36, respectively, mounted in guides 39. The wires extend parallelly from the

keying guides

35 and 36 to adjustable,

keying guides

37 and 38 aligned with the

guides

35 and 36. The

guides

35, 36, 37 and 38 are mounted in guideways 39 by manually rotatable screws 40. The wires extend from the

guides

37 and 38 to an equalizing clamp 41 mounted pivotally on a yoke 42 secured to a tension spring 43, which is fastened to a tension applying adjustment screw 44 mounted in an end 45 of a housing 46 fixed to

trunnions

47 and 48, which mount the head 13 rotatably. The clamp 41 tensions the

wires

30 and 31, and equalizes the tension between the two wires inasmuch as the clamp 41 is pivotally mounted. Pins 49 secured rigidly to the clamp 41 project into slots 53 in the housing 46 to key the clamp to the housing.

Operation of embodiment shown in Figs. 1 through 4 space in the center thereof that is occupied by the

wires

30 and 31. After the condenser 50 is wound to its desired size, the strips 10 andll are severed and the

wires

30 and 31 are severed between the trunnion 22 and the condenser. The clamp 41 then is released manually, and the Wires-are pulled from the condenser, or, if desired, the condenser may be pulled from the

wires

30 and 31 against the action of the clamp 41 and then the wires are removed from the clamps. The clamp 34 then is released and the wires are pulled from the head 12 to the head 13, are inserted into the

keying guides

37 and 33, and are reclamped by the clamp 41 while the spring 43 is under tension, and the operation described hereinabove may be repeated. Condensers wound with the wires spaced widely apart are flat with no danger of the inner turns loosening.

If desired, instead of having the

wires

30 and 31 spaced from one another, the keying guides may be adjusted manually, after the insertion of strips 10 and 11 therebetween, to positions in which the wires press against one another and the strips therebetween, and the winding started in this manner with the wires clamping the strips. Also, in either of these methods, the one of the wires in contact with the metallized face of the strip 10 may be left in the wound strip to form an electrical lead to that plate of the condenser.

Embodiment shown in Figs. 5 and 6 This apparatus includes turning heads 112 and 113 constructed generally similarly and driven similarly to the

heads

12 and 13. The head 112 includes a braked supply reel 127 mounted on a stand 129 which carries a supply of a tape 130 which extends from a clamp 134 on the head 112 to a spring-pulled tensioning clamp 141 on the head 113 through

slots

135 and 137 in the heads. The heads are mounted on trunnions 122 and 147, respectively. A guide roll 143 on a bracket 144 guides the tape from the supply reel to the clamp 134. The strips 110 and 111 may be secured to the tape by adhesive or by tucking the ends of the strips under the second turn thereof. The operation of this apparatus is generally similar to that of the apparatus shown in Figs. 1 to 4 inclusive, the tape 130 being substituted for the

wires

30 and 31, and forms strips 110 and 111 into a very small compact condenser having substantially no open space therein. The

slots

135 and 137 key the tape 130 to the heads, and drives 150 and 151 rotate the heads in unison. Pins 156 fastened to the clamp 141 project through slots 157 in a housing 158 to key the clamp 141 to the housing, and the housing 158 and a housing 159 of the head 112 may be provided with suitable doors for access to the interiors thereof.

If desired, the strips 10 and 11 (Fig. 7), and 110 and 111 may be secured to the

wires

30 and 31 and the tape 130, respectively, by means of a thermoplastic cement for starting the windingof the condensers. After the condensers are wound, an electric current may be forced through the wires or the tape, as the case may be, to heat these elements to soften the thermoplastic cement so that the core or arbor elements may be easily withdrawn from the wound condensers. Also, shears may be mounted on the trunnion 22 for shearing the

wires

30 and 31, and similarly may be provided on the trunnion 122 for shearing the tape 130.

The above-described methods and apparatus serve to wind condensers with substantially no open space therein so that the condensers are very compact. The apparatus is simple and inexpensive in construction and maintenance, while very efiective in its operation. While only single-arbor winding heads have been shown, obviously in each embodiment, multiple-arbor winding heads may be provided so that after one arbor is filled, the head may be revolved to present a second arbor for Winding as the wound condenser is taken off the first arbor.

In the use of the term filament, it is intended to include elongated elements of any suitable cross-sectional.

shape, such as, for example, bands, wires and elongated elements of circular, irregular, rectangular or other shape in cross-section.

It is to be understood that the above-described arrangements are simply illustrative of the application of the principles of the invention. Numerous other arrangements may be readily devised by those skilled in the art which will embody the principles of the invention and fall within the spirit and scope thereof.

What is claimed is:

1. The method of forming condensers, which comprises securing strips to be wound into a condenser to an electroconductive filament by a thermoplastic adhesive, winding the strips into a condenser on the filament, passing an electric current through the filament to heat it and soften the adhesive, and withdrawing the filament from the condenser while the adhesive is softened.

2. The method of winding condensers, which comprises securing a strip to an electroconductive filament by a thermoplastic adhesive, rotating the filament to form a condenser thereon, heating the filament electrically to melt the adhesive securing the strip to the filament, and withdrawing the filament from the wound condenser.

3. An apparatus for winding condensers, which comprises a pair of rotatable heads mounted in axial alignment, means for rotating the heads in unison, a supply reel for supplying an arbor filament mounted on one of the heads, and means mounted on the heads for clamping the filament.

4. An apparatus for winding condensers, which comprises a pair of rotatable heads mounted in axial alignment, means for rotating the heads in unison, a pair of supply reels for supplying arbor wires mounted on one of the heads, means mounted on the heads for clamping the wires, means for tensioning the portions of the wires between the heads, and means keying the wires to the heads in positions in which the wires extend parallelly between the two heads, whereby, as the heads are rotated, strips to be formed into condensers secured to the wires are wound on the portions of the wires between the two heads.

5. An apparatus for winding condensers, which comprises a pair of rotatable heads mounted in axial alignment, means for rotating the heads in unison, a pair of supply reels for supplying arbor wires mounted on one of the heads, means mounted on the heads for clamping the wires, keying guides carried by the heads for holding the wires in positions in which the wires extend parallelly between the two heads, whereby, as the heads are rotated, strips to be formed on the condensers secured to the wires are wound on the portions of the wires between the two heads, and means for adjusting the keying guides on each head toward and away from one another.

6. An apparatus for winding condensers, which comprises a supply head mounted rotatably, a second head spaced from and in axial alignment with the first head and mounted rotatably, means for rotating the heads together as a unit, a pair of supply reels carrying wire 7 mounted on the first head, wire-clamping means mounted on the first head, a second Wire-clamping means mounted on the second head and urged away from the first head, and adjustable wire keying means mounted on the two heads for keying the wires to the two heads in positions in which the portions of the wire between the two heads are parallel.

7. An apparatus for winding condensers, which comprises a pair of heads mounted rotatably in axial alignment with one another, means for rotating the heads together as a unit, a pair of wires, means on the first head for-clamping the wires, means on the second head and urged away from the first head for clamping the wires, means for tensioning the wires, and means for keying the wires to the two heads in positions in which the pertions of the wires between the two heads are parallel.

8. An apparatus for winding condensers, which comprises .a supply head mounted rotatably, a second head spaced from and in axial alignment with the first head and mounted rotatably, a pair of wires, means for rotating .the heads together as a unit, clarnp mounted on the first head for clamping the wires, a second clamp mounted on the second head and urged away from the first head for clamping the wires, and adjustable means mounted on the .two heads for pressing the portions of the wires between the two heads together to clamp therebetween a' strip .to be wound.

References Cited in the file of this patent UNITED STATES PATENTS