US830501A - Protecting-bushing for electric-circuit wires. - Google Patents

Description

No. 830,501. PATENTED SEPT. 11; 1906. J. H. GOEHST. PROTECTING BUSHING FOR ELECTRIC CIRCUIT WIRES.

APPLICATION FILED FEB-16, 1905.

2 SHEETS-SHEET 1 W I v 1 -1 I ill 1 No. 830,501. PATENTED SEPT. 11, 1906.

J. H. GOBHST. PROTECTING BUSHING FOR ELECTRIC 011101111: WIRES.

APPLICATION FILED FEB. 18, 1905.

2 SHEETSSHEET 2.

UNITED, STATES PATENT OFFICE.

JOHN H. GOEHST, OF CHICAGO, ILLINOIS, ASSIGNOR TO FEDERAL ELECTRIC COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

Specification of Letters Patent.

Patented Sept. 11, 1906.

Application filed February 16,1905. Serial No. 245,918.

To all whom it may concern:

Be it known that I, J 011): H. GOEHST, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Protecting-Bushings for Electric-Circuit Wires; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invent-ion relates to improvements in protective bushings for electric wires where the wire is to be passed through a partition, panel-board, the wall of a cut-out box, or other like location; and the invention consists in the matters hereinafter set forth, and more particularly pointed out in the appended claims.

Among the objects of my invention is to provide in a bushing of this character, which avoids grounding of the wires extending therethrough in case the insulation should be stripped from the wire, means for aflixing the bushing to the part through which it extends, so as to prevent vibration or pulling the wires theret-hrough from loosening the same and to provide an inexpensive insulatingbushing and ready means for fastening the same in place.

As shown in the drawings, Figure 1 is a side elevation of a bushing made in accordance with my invention adapted for use in connection with a thin wall or the like.

Fig. 2 is an axial section thereof.

Fi.3isan axial section of a modified form of t e device.

Fig. 4 is a side elevation of a clamping-ring adapted for clamping a bushing in place, as shown in Fig. 3. Fi 5 is a side e evation,

artially in section, 0? a still further modified orm of bushing adapted to extend through Walls or partitions of considerable thickness. Fig. 6 illustrates the bushing shown in Fig. 5 set in place. Fi 7 illustrates a springwasher which is a apted to be interposed between the nut of the bushing shown in Fig. 6 and the art through which the bushing extends. Figs. 8 and 9 are end elevations and vertical sections, res ectively, of a modified form of bushing. ig. 10 is a perspective view of a clamping ring or nut which is to be used with the bushing shown in Figs. 8 and 9.

My improved bushing is made wholly of an insulating material and is provided at its ends with shoulders or stops by which its endwise movement is limited when fixed in place and is held in place by a suitable positivelyacting screw-threaded locking device, whereby it is held reliably in place.

The bushing A (shown in Figs. 1 and 2) is made of a single piece of insulating material and consists of a head or flange a, which is shown as peripherally corrugated, and a shank portion a" which is provided with exterior screw-threads, herein shown as extending practically from the shoulder (1 formed by the inner face of the head, to the outer end of said shank.

B designates a locking ring or nut having screw-threaded engagement with the shank. Said clamping ring or nut is preferably made of sheet metal and is provided at one end with a flange b, which opposes the shoulder a of the bushing and between which clamping pressure is effected which holds the bushing in place. Ast-he ring and flange are made of sheet metal, the flange is resilient and acts when the ring is turned tightly in place to prevent the ring from jarring loose.

The bushing is provided with an axial opening A of sufficient diameter to receive the wire or wires adapted to extend therethrough, and said opening is rounded on its ends to prevent chafing of the wires against the bushing at the ends thereof from wearing the insulation therefrom. In fixing said bushing in place a hole somewhat larger than the shank of the bushing is bored through the part to which the bushing is to be attached,

"and thereafter the shank of the bushing is thrust through said hole and clamped in place by the clamping-ring. It will be observed that the bushing extends at both ends beyond the part to which it is attached. The clamping-ring may be fixed to the bushing either ,bymeans o a lock-nut or may be cemented thereon.

The bushing C (shown in Fig. 3) comprises a head or flange c and a shank c, which is screw-threaded from one. end thereof to the other. Said bushing is fixed in place by means of a screw-threaded sheet-metal ring or nut D engaging the screw-threads of said shank and provided with a spring-flange d, which has a concave form to increase the resome length and is screw-threaded throughout the length of its shank. This bushing may therefore be made to adapt itself to parts of varying thiclmess, it only being necessary to break ofl a portion of the end there- -of in case the bushing projects t'oo farfrom the part through which it extends. In Figs. 5 and 6 I have shown a bushing intended to be inserted through a wall or like part of considerable thickness. The bushing indicated therein is designated by the reference-letter E and comprises a head e, having an elongated shank e, that is provided at its extreme end with a short screw-threaded sectione which receives a screw-threaded locking ring or. nut F. Said locking-ring F is made similar to the ring or nut D described, it having a spring-flange f, which may be radially slitted, as shown. v

In Fig. 6 the bushing is shown in place and extending through a wall or likepart G of considerable thickness. 'In case such part G be madeof slate, marble, or like brittle mathe teria-l it often occurs when boring the opening in said part to receive the bushing the drill breaks out the material around the outer end of the hole being drilled, as-indicated at g in Fig. 6. In such event it is desirable in order to properly clamp the bushing in place and to afl'orda neat fitting of the bushingto ipart through which it extends to make the ange f of the clam ing-nut of suflicient diameter to cover said iEroken-out part or to interpose a washer H between the flange of the nut and said part. The washer shown is made of sheet metal and is'slitted ath to increase the resiliency thereof.

In Figs. 8 and 9 I have shown a form of bushing that is designed to be placed around the wire or wires extending through a Wall, partition, or the like without disturbing or cutting the wires. For this purpose the bushing (indicated'as a whole by I) is composed 'of two or morelongitudinally-divided parts i 7., so arranged or constructed that when brought together they form a complete and much as the dividing of the 'shank in'the manner described tends to vary the diameter of the shank such slitting of the nut or looking-ring is found to be advisable and advantageous.

I claim as my invention 1. A bushing for protecting electric-circuit wires made wholly of insulating material, and comprising a hollow shank provided at one end with a hollow head, and at its other end with a screw-thread, and a thin, sheetmetal, screw=threaded locking-ring engaging said screw-thread and provided with an integral resilient flange opposing said head of the bushing.

2. A bushing for protecting electric-circuit wires made wholl T of insulating material, and comprising a ollow shank provided at one end with a hollow head and at its other end with a screw-thread, a screw-threaded locking-ring engaging said screw-thread and provided with a flangeopposing said head, a concave spring-washer made larger than said locking-ring and interposed between said flange and the part through which the bushing extends.

3. A busning for the purpose set forth comprising a hollow shank provided at one end with a hollow head and at its other end with a screw-thread and a thin sheet-metal screwthreaded ring engaging said 'screw thread of the shank and provided on its inner end with an integral, slitted, concave flange opposing I' IOO said head. r 4

In testimony that I claim the foregoing as my invention I affix my signature, in presence of two witnesses, this 7th day of February,

JOHN H. GOEHST. Witnesses: W. L. HALL,

G. R. VILKINS.

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