US1726543A - Ignition condenser - Google Patents

Description

P 3, 1929. L. F. CURTIS ET AL IGNITION CONDENSER Filed Feb. 13, 1928 Les/1': paw? 75/ 0 F Marx/ 7 BY; m ATTORNEY Patented Sept. 3, 1929.

UNITED STATES,

PATENT OFFICE.

. ,d\ LESLIE I. CURTIS AND JOHN F. MARTIN, OF SPRINGFIELD, MASSACHUSETTS, AS-

SIGNORS TO AMERICAN BOSCH MAGNETO CORPORATION, OF SPRINGFIELD, MAS- SACHUSETTS, A CORPORATION OF NEW YORK.

IGNITION CONDENSER.

, Application filed February 13, 1928. Serial No. 253,991.

This invention relates to condensers, and more particularly to' ignition condensers for use in timers for combustion engines.

The object of this invention is to provide a condenser which is completely enclosed and sealed, and in which the terminals are incapable of rotation. 1

Our invention consists in providing a cylindrical condenser-having flexible-leads which are connected respectively to the shell in which the condenser is placed, and a terminal 'insulatively mounted on said shell.

that the flexible leads were broken and the con- One of the principal features of this invention is the construction of a seat for one of the terminals of the condenser so as to provide a water-tight joint without the use of solder.

Heretofore, it has been the practice to enclose the condenser in a shell, but instead of the terminal being mounted on said shell, it was mounted on one endof the condenser, and the termial was exposed through an opening in said shell. It was therefore sometimes possible to rotate the condenserin said shell by turning the terminal with the result denser in other ways damaged. Further, the opening in the shell permitted air, moisture to get into the shell to affect adversely the integrity of the condenser. In some cases the terminal was also turned independently of the condenser, making a proper exteiinal connection by means of a screw diflicu t.

By our construction, we have so enclosed the condenser in the shell that no air, dust or moisture can penetrate the shell, and secondly, fixed the terminal on the shell so that no rotation is possible.

The preferred embodiment of our invention is illustrated in the accompanying drawings, in which M.

Fig. 1 is a top view of th shell;

Fig. 2 is a bottom view ofitpwe shell; and

Fig. 3 is 'a longitudi 1 cross section through the complete conde ser.

Throughout the drawing like reference characters indicate like parts.

The shellis composed of two telescoping sections 1 and .2. into which the condenser 3 is snugly enclosed. The bottom of the shell 2 has soldered to it aperforated attaching plate gt and the shell 1 has passing through it a tudust and p l is preferably of hexagonal construction.

The edge of the top of the shell 1 is flattened, 14, 14, and between the flattened portions of the shell is placed the washer 7 having, as does washer 6, a similar conformation to the flattened area of the top of the shell. This construction prevents the washer 7 from rotating with respect to the shell and, hence, also, the terminal 5.

In order to prevent rotation of the terminal, the neck 10 of the terminal is forced into the hexagonal opening in the washers 6, 7, as by spinning. J g x The condenser is provided with a flexible lead 11 which is soldered to the bottom of the condenser and is brought up along the side of the condenser and over the edge of the shell 2, when it is finally soldered between the overapping portions of the shells, or the inner shell alone.

Another flexible lead 12 is soldered to the upper end of the condenser and the lead passed through the opening in the terminal 5. A lead disposed in said opening so that a firm electrical contact shall be had between the lead 12 and the terminal 5.

The end of the lead 12 should be completely covered by the lead seal or plug. The plug may be put in place by forcing into the threads a smooth ended steel screw which expands the lead plug over the end ofv the wire, hermetically closing the ioint.

Wrapped around the upper portion of the condenser and disposed between it and the shell 1 is a sheet of paper 15 having a margin 16 which extends beyond the condenser and folds over it.

It will be observed that due to the polygonal construction of the opening in the top of the shell 1 and the peening over of the bottom of the screw, the terminal is incapable of rotation or movement in and out, and secondly, that due to the cooperation of 17 between the shells 1- and 2 is soldered.

Having described our invention, what we claim 1s:

1. A condenser caslng comprlsing a shell,

a flattened peripheral area on said shell, in

sulating washers coinciding with and mounted on the flattened section, and a terminal mounted thereon.

. 2. A condenser casing comprising a shell, a flattened peripheral area on said shell,'in sulating washers coinciding with and mounted on the flattened section, and a terminal between which the washers and flattened area are securely held.

3. A condenser casing comprising a shell, a flattened peripheral area on said shell, polygonally apertured insulating washers coinciding withand disposed on either side of the flattened section, and a terminal insulatively mounted on said shell securing the,

washers to the flattened area.

' 4. A condenser casing comprisinga shell,

a flattened peripheral area on'said shell-, po-' lygonally apertured insulating washers coin ciding with and disposed on either side of the flattened sections, and a tubular terminal insulativelv mounted on said shell securing the washers to the flattened area.

5. In combination, a cylindrical condenser, a casing therefor comprising a shell, a flattened peripheral area on said shell, poly onally 'apertured insulatingwashers coinciding with and disposed on either side of the flattened section, a tubular terminal insulatively mounted on said shell, securing the washers to the flattened area, and a lead plug inserted into said terminal ensealing a lead wire from the condenser and hermetically sealing the condenser. Y

6. In combination, a cylindrical condenser,

a casing therefor comprising a shell, a flattened peripheral area on said shell, p'olygonally apertured insulating washers coincid- 1 ing with and disposed on either side of the flattened section, a tubular terminal, insulatively mounted on said shell, securing the washers to the flattened area by peening over the lower end of the terminal, the terminal being also provided with an opposing shoulder, and a lead plug inserted into said terminal ensealing a lead wire from the condenser and hermetically sealing the condenser.. I

In testimony whereof I aflix my signature.

' LESLIE F. CURTIS. In testimony whereof I afiix my signature.

JOHN F. MARTIN.

Images