US2004616A

US2004616A - Electric apparatus

Info

Publication number: US2004616A
Application number: US660123A
Authority: US
Inventors: Jr Robert E Park
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1933-03-09
Filing date: 1933-03-09
Publication date: 1935-06-11
Anticipated expiration: 1952-06-11

Description

June 11, 1935.

R. E. PARK, JR

ELECTRIC APPARATUS Filed March 9, 1933 FIG.

FIG 2.

FIG 4. 4

FIG. 3

FIGH S INVENTOR E. PARK JR. R"YIWJM ATTORNEY Patented June 11, 1935 STATES PATENT OFFICE ELECTRIC APPARATUS Application March 9, 1933, Serial No. 660,123

7 Claims.

The invention relates to electric apparatus and more particularly to electric condensers of the foil type.

In the prior art it has been the practice in some instances in connection with the manufacture of electric condensers of the foil type to provide a single sheet metal clip in the shape of a U with the sides of the U parallel to the condenser foil for impressing and gripping the projecting ends of the foil and to which clip conducting wires could be attached by soldering or otherwise. This method becomes undesirable when a large number of foils is used as it results in a cumbersome unit and extreme care must be exercised both in applying the clip and in subsequent handling to avoid destroying the foils.

An object of the invention is to provide connector means applicable to condensers oi any thickness or to a plurality of condensers whereby a compact unit is obtained.

In accordance with a preferred embodiment oi the invention herein illustrated and described the projecting ends of the conducting or charge receiving foils are electrically connected together and to a sheet metal connector having a plurality of clips integral with a rigid terminal. The clips are of U-shape with the closed portions of the U facing each other and with the sides of the U substantially parallel to the body portion of the connector. The body' portion'of the connector is positioned adjacent and perpendicular to the foils in the condenser proper. The foils are divided into two approximately equal portions, brought around the ends of the body portions of the connector, inserted in the U-shape clips and the clips compressed to grip the conducting members for electrically connecting them together and to the connector.

Other objects and advantages of the invention will appear from the following description when considered in connection with the-accompanying drawing, in which Fig. 1 is a perspective view of a mica and foil condenser;

Fig. 2 is a perspective view of a pair of wound paper and foil condenser units joined by means Fig. '7 is an elevational view, partially in section, of several wound paper and foil condenser units joined by means of a one piece connector.

Referring to Fig. 1' the condenser shown has the usual series of insulating and conducting sheets. The insulation may be of any suitable material but mica sheets I0 have been found particularly satisfactory. The usual tin foil sheets II are interposed between and extend beyond the mica sheets l0. Several conducting sheets H, which are shown slightly smaller than the tin foil sheets I I but which may be of the same size as the sheets H, are preferably of a stronger metal such as copper and are inserted at each end of the condenser stack. The stack of sheets of insulation and conducting material is placed between two clamping plates I5 and I6, which plates are held together by means of bolts 20, 2| 22 and 23, which are preferably threaded into the clamping plate I6. Measurements are now made of the capacity of the condenser, which capacity is known approximately from the number of sheets of foil used, their area and their distance apart. It is general practice to employ a number of foil sheets so that the capacity of the unit will be slightly larger than the desired capacity. The bolts 20 to 23 inclusive, are loosened and one or more of the'heavy foil sheets I? are pulled out, if the capacity is greater than that desired, and a second measurement taken. This is repeated until the correct capacity value is obtained.

The connector 30 (Figs. 1' to 5 inclusive) has a body portion 3!, two U-shaped clips 32 integral with the body portion, and an elongated flexible terminal portion 33 integral with the body portion 3|. The connector is preferably made from a blank 40 (Fig. 6) so that the outer or terminal end 34 ofthe elongated portion 33 will have a greater thickness than the connector body 3| and the clips 32. This is preferably obtained by bending the portion 4| over to form a rigid terminal end 34 of double thickness, as shown in Figs. 3 to 5 inclusive.

The ends of the projecting foils H and I2 of the condenser shown in Fig. l are divided into two approximately equal portions which are brought around the back of the body portion of the connector 38 and inserted in the U-shaped clips 32. The sides of the clips 32 are then preferably compressed to firmly hold the conducting foils together and in contact with the connector 30, and the clips are then pressed toward the mica sheets ill to form a compact unit as shown in Fig. 1.

As the toils H and 12 are divided in two portions and are brought around the back of the body portion of the connector, the foils cannot' be readily bent back and forth as would be the case if a single connector is employed, and the body portion of the connector 30 alfords considerable protection to the individual foils H and I2. The unit shown in Fig. 1 may, if desired, be potted in a container with the reenforced outer or terminal ends 34 of the connectors 30 projecting through the container.

When desired all of the conducting sheets I] and i2 may be of aluminum, steel, nickel or other materials which have not been used to any extent in the prior art due to the difficulty encountered in soldering them together, and, as they Y are usually thicker than tin foil, the difficulty encountered in attempting to employ a single clip to electrically connect them together. The connectors can then be made of the same material as the conducting sheets to avoid any possible electrolytic action.

A multiple clip connector 50 such as shown in Figs. 2 and '7 can be employed to connect together a number of wound paper condensers 5| of the type in which the foil 52 extends beyond the paper insulation 53. The units 5| thus assembled together may be potted in a single container.

The invention is also capable of other modifications and adaptations not specifically referred to but which are included within the-scope of the appended claims.

What is claimed is:

1. A sheet metal electrical terminal having two clips integral therewith and each arranged in U shape with the closed portions of the U facing each other for gripping two groups of conducting members to connect all of the conducting members together.

2. A sheet metallic connector having an elongated terminal portion and a plurality of clips integral therewith, each of said clips of U shape and arranged for gripping a group of conducting members to electrically connect them together, the free end of the elongated terminal portion comprising two layers of the sheet metal to provide suflicient mechanical strengthat the end and to permit suflicient flexibility between the free end and the clip portion.

members for electrically connecting them to-' gether, the closed portions of the U in each pair of clips facing each other.

4. In an electrical condenser, a plurality of clips.

layers of electrostatic charge receiving sheets, a plurality of layers of solid dielectric between the layers of charge receiving sheets, a sheet metal connector having an elongated terminal portion and a plurality of clips integral therewith, each of the clips having a. U form with the sides 'of the U extending substantially perpendicular to the charge receiving sheets, the charge receiving sheets being impressed between the sides of the clips, the free end of the elongated terminal portion comprising two layers of" the sheet metal to provide suflicient mechanical strength at the end and to permit suflilcient flexibility between the free end and the clip portion.

5. A sheet metal electrical connector having an elongated terminal portion and two clips integral therewith and each arranged in U shape with the closed portions of the U facing each other for gripping two groups of conducting members to connectall of the conducting members together, the free end of the elongated terminal portion comprising two layers of the sheet metal to provide sufficient mechanical strength at the end and to permit sufficient flexibility between the free end and the clip portion.

6. In an electrical condenser, a plurality of layers of electrostatic charge receiving sheets, a plurality of layers of solid dielectric between the layers of charge receiving sheets, a sheet metal connector having an elongated terminal portion and two clips integral therewith, each of the clips having a U form with the closed portions of the U facing each other and the sides of the U extending substantially perpendicular to the charge receiving sheets within the condenser, the charge receiving sheets being brought out from the condenser around the ends of the connector and impressed between the sides of the clips for electrically connecting them together, the free end of the elongated terminal portion comprising two layers of the sheet metal to provide suflicient mechanical strength at the end and. to permit suflicient flexibility between the free end and the clip portion.

'7. In an electrical condenser, a plurality of layers of electrostatic charge receiving sheets, a plurality of layers of solid dielectric between the layers of charge receiving sheets, a sheet metal connector having an elongated terminal portion and a, plurality of clips integral therewith, each of the clips having a U form with the sides of the U- extending substantially perpendicular to the charge receiving sheets, the charge receiving sheets being impressed between the sides of the ROBERT E. PARK, JR.