US638230A

US638230A - Binding-post and connection for electrical apparatus.

Info

Publication number: US638230A
Application number: US71507899A
Authority: US
Inventors: Alexander Fischer
Original assignee: ALBERT R SHATTUCK
Current assignee: ALBERT R SHATTUCK
Priority date: 1899-05-01
Filing date: 1899-05-01
Publication date: 1899-12-05
Anticipated expiration: 1916-12-05

Description

No. 638,230. Patented Dec. 5, I899.

A. FISCHER. BINDING POST AND CONNECTION F08 ELECTRICAL APPARATUS.

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ALEXANDER FISCHER, OF NEW YORK, N. Y., ASSIGNOR TO ALBERT R. SHAT- TUGK, OF SAME PLACE.

BINDING-POST AND CONNECTION FOR ELECTRICAL APPARATUS.

SPECIFICATION forming part of Letters Patent No. 638,230, dated December 5, 1899- Application filed May 1,1899. Serial No. 715,078. (lilo model.)

To all whom it may concern:

Be it known that I, ALEXANDER FISCHER, of the city, county, and State of New York, have invented a new and useful Improvement in Binding-Posts and Connections for Electrical Apparatus, of which the following is a specification.

My invention has for its object to provide a means for electrically connecting a conduct- 1o ing wire or cable to any electrical appliance such, for example, as an induction-coilin such a manner as that the connection will be completely impervious to moisture, either at the joint or elsewhere. I

My invention consists, first, in the construction of the connecting device which is secured to the conducting-wire, and, second, in the combination of that device with a casing of insulating and impervious material inclos- 2o ing said appliance in such a way as to form a moisture-tight joint.

My invention consists more particularly in the construction and arrangement of the several parts, as hereinafter pointed out in the claims.

In the accompanying drawings, Figure 1 is an enlarged cross-sectional view of niyimproved binding-post and connection. Fig. 2 shows in perspective two of said binding-posts in place upon the inclosing case of an electrical appliance.

Similar letters of reference indicate like parts.

A is a rod of metal screw-threaded on its 5 exterior and secured in any suitable way in the side of the inclosing case B,-whicl1 is of non-conducting material. The post A connects with the electrical appliance Within the case by means of the wire 0. (Shown broken off in Fig. 1.)

D is a tubular cylinder of metal closed at one end and threaded both inside and outside. The external thread of cylinder D engages with the internal thread of an inclos- 5 ing cylinder E, which is made of hard rubber or other Waterproof insulating material. Cylinder E is closed at one end and is provided at such closed end with a small opening through which passes the conducting-wire F. This wire enters a recess in the closed end of cylinder D and is secured therein by solder or other suitable means. Surrounding wire F maybe a coating of cotton G, and outside of said coating is a covering H of soft rubber, which is secured by cement at J within the opening in cylinder E, through which it passes. The post A is received in the threaded bore of cylinder D, which is screwed down upon said post. Between the lower edge of cylinder D and the side of the case B is inter- 6o posed a soft-rubber washer I. By this construction I obtain a perfectly water-tight connection. The wire 0, being covered by rubber, is of course impervious to moisture. The joint at'J between the rubber covering and the rubber cylinder E is also tight. The rubber cylinder E completely protects the inner metal cylinder D, and it will be noticed that the said cylinder D does not completely fill the inclosing rubber cylinder E. Hence the joint between the rubber cylinderE and side of the case B involves simply the approximation of hard-rubber faces to the soft-rubber washer I, whereby said joint is packed, by the screwing down of cylinder D upon post A, as tightly as may be desired.

The side B may be a part of a box or case of any desired form-such, for example, as shown in Fig. 2-and any electrical appliance may be inclosed therein. My invention is, however, especially applicable to inductioncoils, and especially those used for the production of igniting-sparks for gas-engines, &c. In such event it is exceedinglyimportaut that the coil and all its connections. should be protected from moisture, as otherwise the efficiency of the coil rapidly deteriorates. Such a coil would therefore be inclosed in the case represented in Fig. 2 with its terminals united to binding posts, as shown, constructed in the manner already eX- plained.

In the specific construction shown in the drawings I have represented the cylinder D as externally threaded and engaging with the 5 internally-threaded cylinder E of non-conducting material; but it is to be distinctly understood that I do not limit myself to this mode of securing the external cylinder upon the internal cylinder, since it is obvious that too I may make said cylinders smooth internally and externallyin lieu of screw-threaded and secure them together by means of cement or by any other suitable means.

I claim 1. The combination of the tubular cylin- 5 der D of conducting material having one end closed, the inclosing tubular cylinder E of non-conducting Waterproof material and closed at one end and receiving and secured to said cylinder D, the conducting-wire F ex {0 tending through said cylinder E and electric- 20 binding-post, the tubular cylinder E of nonconducting Waterproof material and closed at one end and receiving and secured to said cylinder D, the conducting-Wire F extending through said cylinder E and electrically connected to said cylinder D and the insulating waterproof coating H of said wire forming an impervious joint with said cylinder E, substantially as described.

3. The combination with the casing B of non-conducting material having the externally-threaded binding-post A, of the tubular internally threaded cylinder D of conducting material having one end closed and adapted to receive Within it said bindingpost, the tubular cylinder E of non-conducting waterproof material and closed at one end and receiving and secured to said cylinder D, the conducting-wire F extending through said cylinder E and electrically connected to said cylinder D, the insulating waterproof coating H of said wire forming an impervious joint with said cylinder E, and the elastic washer I interposed between said cylinder E and said casing, substantially as described.

ALEXANDER FISCHER. lVitnesses:

CHARLES P. ROWLAND, J. P. GIBsoN.