US1574297A

US1574297A - Electric cable

Info

Publication number: US1574297A
Application number: US520512A
Authority: US
Inventors: Charles L Lilleberg
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-12-07
Filing date: 1921-12-07
Publication date: 1926-02-23
Anticipated expiration: 1943-02-23

Description

Feb. 23 1926.

C. L. LILLEBERG ELECTRIC CABLE Filed Dec. 7 1921 Patented Feb. 23, 1926.

UNITED STATES PATENT OFFICE.

cnuinns L. LILLEBERG, OF cnrcneo. ILLINOIS.

ELECTRIC cABLE.

Application filed December 7, 1921. Serial No. 520,512.

To all whom it may concern:

Be it known that I, CHARLES L. LILLEBERG, citizen of the United States, residing at Chicago, in the county of Cook and State proved construction, whereby the wires of the cable are accessible along the length of the cable for circuit connection.

The cable of my invention is provided with an enclosing conduit formed with lateral openings throughwhich wires of the cable are accessible for circuit connection. This conduit is preferably stiff to be capable of maintaining its own shape, there being desirably also a stiffening core within the cable.

I will explain my invention more fully by reference to the accompanying drawing showing the preferred embodiment thereof and in which Fig. l is a front view of a timing switch equipped 'with the invention; Fig. 2 is a side view of the switch shown in Fig. l with the mounting therefor in section; Fig. 3is a somewhat diagrammatic view'of the portion of the cable that is to surround the timer casing, before such por .tion is curled about the casing; Fig. 1 shows the metallic stiffening core and the contiguous portion of the flexible conductor united therewith; Fig. 5 is a perspective view of the adjacent ends of the core and conductor of Fig. 4: in separated relation; Fig. 6 is a perspective view illustrating the structure as it appears in Fig. 1 with the timing switch casing and the support for such casing removed; and Fig. 7 is a sectional View on line 7-7 of Fig. 6.

Like parts are indicated by similar characters of reference throughout the different figures.

The timing switch illustrated is provided with any suitable support 1 in which an engine driven shaft 2 is mounted to turn. This engine driven shaft is suitably connected with a traveling contact 3 which may be in the form of a roller suitably connected ,with one terminal of a source of current that is to be successively included in circuit with the contacts of spark plugs'in the cylinders of a multiple cylinder internal comhustion engine. The shaft 2 terminates within a timer casing 4 which is rotatable upon support 1 and houses the contact 3 suit-- ably supported upon the contiguous end of shaft 2. This timing switch casing supports a plurality of contacts 5 equal in number to the number of cylinders included in the engine equipped with the switch, in this instance four. The casing 4: is formed with the usual cavity that receivcs a similarly shaped portion formed in a retaining spring 8, all as is understood by those skilled in the art. The casing is turned by a timing lever 9 that is in the form of a rod having an end which passes through an ear 10 formed upon the casing. The conductors 11, each individual to and connected with a contact 5, are assembled into a cable and pass through a conduit 12 which partially surrounds the timing casing, the conductors 11 terminating in or being connected with metallic terminals 13, each conductor having such a terminal individual thereto. These terminals are clamped between the nuts 14 of binding posts that are respectively individual to the contacts 5.

All of the conductors 11, except one, preferably are entirely formed of tinsel wire so as to be quite flexible. The conductor 11 which is not entirely formed of tinsel includes a stiff section 15 which is preferably a brass rod in the nature of a core that will retain the shape imparted to it and the similar shape of the cable portion of which it forms a part. 15 desirably has one end formed into a half sleeve 16 as indicated in Fig. 5. The complemental tinsel portion of the corresponding conductor 11 is received in this half The stiff conductor section sleeve and is soldered, whereby the section 15 becomes an electrical continuation of one of the conductors 11. The conduit portion 12 is long enough to provide the part of the cable which surrounds the casing with a stem 17 which extends a sufficient distance away from the casing to permit of the attachment thereto of the flexible tube 18.

The conduit section 12 extends for a short distance within the tubing 18, a sleeve 19 of rubber completing the joint between the two conduit sections and tending to prevent their separation. The stiffening core 15 is desirably almost coextensive with the conduit section 12, extending considerably into the bore of the sleeve 19, whereby the cable portion 17 is also made stifi. By this construction that portion of thecable which is assembled with the timer casing is made rigid with res ect thereto, while the continuing part 0 the cable that is within the tubing 1S is sufiiciently flexible. readily to permit of the spark advancing and receding adjustments of the timer casing.

In assembling the conductors within the conduit section 12, the three completely flexible wires 11 are first placed within the bore of the conduit section 12, whereafter the rigid section 15 of the remaining conductor 11 is easily forced into position. The stiff section of the cable may be brought to suitable sha e apart from the timer casing, the shape 0 this part of the cable being maintained by the stiifening core 15 whether the cable is assembled with the timer switch casing or not.

While I have herein shown and articularly described the preferred embod1ment of my invention I do not wish to be limited to the precise details of construction shown as changes may readily be made without departing from the spirit of my invention, but

aving thus described my invention I claim as new and desire to secure by Letters Patent the following A cable provided with an enclosing conduit having a portion formed with lateral openings distributed along the same through which wires of the cable are accessible for circuit connection, said cable also having a stiffening core in its conduit. 1

In witness whereof, I hereunto subscribe my name this 29th day of November- A. D.,

CHARLES L. LILLEBERG.