US740314A - Insulator. - Google Patents

Description

No. 740,314. PATENTED SEPT. 29',

0. B. & J. J. ROBERTSON.

IN SULATOR. APPLICATION IILED JAN. 12, 1903.

I0 MODEL.

q vmmao UNITED STATES Patented September 29, 1903.

PATENT- OFFICE.

CHARLES B. ROBERTSON AND JOHN J. ROBERTSON, OF OTTUMWA, IOWA.

INSULATOR.

SPECIFICATION forming part of Letters Patent No. 740,314, dated September 29 1903. Application filed January 12,1903 Serial No. 138,720. N model) To all whom it may concern:

Be it known that we, CHARLES B. ROBERT- SON and JOHN J. ROBERTSON, citizens of the United States, residing at Ottumwa, in the county of Wapello and State of Iowa, have invented certain new and useful Improvements in Insulators; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

Our invention relates to insulators for electric line-wires, and has for its object a device of this kind which will permit the wire to be connected to the insulator without the use of any tie-wires. I

- A further object is to provide an insulator to which a wire may be readily connected and which will be securely held thereby.

Our invention is shown in the accompanying drawings, in which- Figure 1 is a front elevation. like view taken at right angles to Fig. 1. 3 is a top plan View.

Referring specifically to the drawings, 5 indicates the body portion of our insulator, which has a threaded socket 5, by which it is screwed on the usualinsulator-peg. The head 6 of the insulator has a vertical slot or groove 7 extending from the top downward a suitable distance. A vertical opening or slot Fig. 2 is a Fig.

8 is also formed in the head across the slot 7. The top or bottom of the opening 8 forms a bed or seat for the wire W. The slot 7 and opening 8 extend entirely across the head and are connected by an inclined passage 9, extending upward from the bottom of the slot 7 to nearly the top of the opening 8. Below the slot and opening we form a groove 10 for a tie-wire in case it is desired to use one, but which is usually not necessary.

In use the insulator is screwed down on the peg within a quarter-turn of being tight. The wire is then placed in "the slot 7 and passed through the passage 9 into the opening 8, the insulator at the same time being screwed down to its final resting position. It is then impossible for the wire to leave the slot 8 unless the insulator is turned back. The insulator can be hung in any position, and the wire will be securely held in the top as well as in the bottom end of the slot 8.

Having thus described our invention, what is claimed as new, and desired to be secured by Letters Patent, is

An insulator having a vertical slot in the head thereof, a vertical opening in the head at an angle to said slot forming a seat for the wire, and a passage extending upward from the bottom of the slot to the top ofthe opening, substantially as described.

In testimony whereof We affix our signatures in presence of two witnesses.

CHARLES B. ROBERTSON. JOHN J. ROBERTSON.

Witnesses:

ROBERT C. CORBUS,- E. J. LAMBERT.

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