US1038418A - Insulator. - Google Patents

Description

.W. H. S. NELSON.

INSULATOR.

APPLICATION FILED PEB.20,1911.

1,038,418, A Patented' sept. 10,1912.

my Za ZL'aHLJy-f. 16am UNITED sraiwnnr orrion- WILLIAM H. S. NELSON, QF CAION GPBNGS, WEST VIRGINIA.A

INSULATR.

y T @ZZ whom Zij may concern.'

Be it known that l, VILLIAM H. S. NEL- soN, a citizen of thevUnited States, residing at Capoii Springs, in the county ot ll ampshire and State of Vllest Virginia, have invented new and useful Improvements in lnsulators, of which the following is a specitication.

My present invention relates to improvenents in insulators for electric wires, and it has for its object primarily to provide an improved insulator having a groove to receive the wire without requiring the wire to be tied, lient or coiled and said groove is formed 'with shoulders and also with laterally widened slots at opposite sides of the shoulders to coperate with flattened ior otherwise expanded portions of the wire to limit or prevent longitudinal shifting of the wire and to prevent lateral displacement thereof relatively to the insulator.

To these and other ends, tline invention consists in certain iinprovements and combinations and arrangements otd parts, all. as will be hereinafter more fully described, the novel features being pointed out particularly in the claims at the end of the specification.

ln the accompanying drawing Figure l is a perspective view of an insulator con, structed in accordance with one embodiment of my invention; F ig. 2 represents an 'elevation otthe insulatoras viewed lengthwise of theu7,ire-ieceiving groove; F ig. 3

represents a'oentral vertical section of thel insulator taken in a plane coincident with the wire-receiving groove; Fig. l represents a transverse section otV the insulator on the line 41% ot Fig. 2; Figs. 5, 6 and 7 are diagrammatic views showing the manner in which the wire is applied and locked with respect to the insulator; F ig. 8 is a view similar to Fig. 2 showing the position of the wire when locked 'to the insulator; and Figs, 9 and l0 show in side elevations moditied forms ot the insulator. y

Similar parts are designated by the same reference characters in the several views.

ln the present instance,` the insulator com-- prises a body l which may he compos/dof glass, porcelain, or other insulating material, and may he formed with the usual thread 2 orother suitable means for mounting it upon a cross-arm or other support. l'n that form of the invention shown l to 8 inclusive7 the hotly ot 'the insulator is speciaation af Leiters rat-ent.

Application. filed February 20, 1912.

Patented sept. 10, 191e.

Serial 609,745.V

formed with a wire-receiving groove 3 which extends vertically and downwardly from the 'top of the insulator. This wirereceiving groove `is sufficiently wide to receive the wire 4, the groove by preference being slightly wider than the wire to be used in connection with the insulator. At or adjacent to the bottom of the wire-receiving groove, recesses 5 and 6 are formed in one or both of the walls ot' the wire-receiving groove, these recesses being formed in both walls of the groove in the present instance. These recesses extend from diametrically opposite points on the periphery of the insulator inwardly but terminate short,- of the center ot therinsulator, the intermediate portions or" the walls of the wire-receiving groove separating the recesses 5 and 6 and forming shoulders or ahutment's 7 the distance between the shoulders or abut-ments 7 being equal to or slightly more than the normal diameter or size ot' the wire and less than the spaces or slotswhich are formed -at the opposite sides thereof by the yrecesses 5 and u in applying the wire to the insulator, the wire in introduced into the wire-receiving groove, the wire is then drawn in the direction indicated by' the arrow in Fig. 5 to remove slack, and the wire is then flattened by a suitable tool to form a laterally eX- panded portion 8 immediately adjacent to the periphery of the insulator. After this flattened portion 8 has been formed in the wire, the strain thereon is relieved and the tension on the wire will 4then cause the eX- panded or flattened portion 8 of the wir'e 'to enter the recesses 6 in the insulator, the

inner end ot the flattened o-r expanded portion of the wire then abutting against the shoulders as shown diagrammatically in' Fig. G. TslVhile the wire is in thisposition, the wire is iiattened to form a laterally eX- panded portion 9 at the opposite side of the insulator and, under normal conditions, the tension on the wire at opposite sides of the insulator will cause both of the expanded portions 8 and 9 ot' the wire to rest in the recesses t3 and 5, respectively. But under any fiitions, the flattened areas ot the wire ne separated distance less than the diameter of the insulator, hence, one of. said iattened areas will also engage its correspondinnnotch or recesses -in the insulator, and so the vvire is prevented or locked from Civ wise disengaging troni the insulator, the expanded portions ot the wire being oiC a lateral dimension greater than the width of the wire-receiving groove and, moreover, longitudinal rnoveinent ot the wire is limit ed or prevented by the shoulders or abutments Y which occupy a position between the laterally expanded or lattened portions or the wire.

ln sonie special cases, it may be vdesirable or necessary to employ the usual tie wire for securing the line wire to the insulator and, tor this purpose, the insulator niay be formed with the usual circumferential groove l0 to receive the tie wire. To prevent accumulation ot' snow or ice in the wirereceiving groove or seat in the insulator,

'the wire-receiving .groove niay extend inwardly trom one side of the insulator and horizontally, as shown in Fig. 9, or, the wirei'eceiving groove inay extend in an in.- clined 'direction upwardly and inwardly troni oneside of the insulator, as shown in -Fig.. i0, the construction ot these insulators being:r otherwise siinilarl to the one i'irst described.

lii constructing an insulator in accordance with my invention, the peripheral ends ot the wireoeceiving groove are widened or -undercut at points adjacent to the bottoni or inner terminus of the groove whereby the flattened or laterally enlarged portions of the wire interlock with these undercut vxwalls to prevent displacement ot the wire 'troni the' groove, while that part ot the groove between t-lie widened or undercut portions is or" a width corresponding Ato the reniainder of the groove, thereby forining` shoulders or abutn'ients to cooperate with the widened or expanded portions ot the wire to liniit or prevent undue longitudinal inovenient ot the wire relatively to the insulator. l

l claim as niy invention la jin insulator comprisingl a body having a straight inwardly extending wire-receivg groove the inner terminus of which is widened laterally at opposite sides and at each end oit the groove to torni abutment shoulders to cooperate with and. prevent displacement oit the wire :troni the groove.

Q. rlF'he coi'nbination of an insulator coinlf this patent may be obtained for five cents each,

.eis

prising a. body having a. wire-reo ivi f groove the walls of which under-cip a' points adjacent to the inner terminus of the groove, and a wire extending through said groove and having sanded portions engaging the undercut portions oit the walls thereof to 'prevent displacement the wire troni the groove..

3. An insulator connV a wire-receivingwhich are recessed at pon Ls adjae( t inner terminus ot the D 'cove to torni orally widened slots which extend la beyond the walls oit the groove and liniiiil shoulders between thein [in insulator coniprisin a body havin a wire-receiving groove the opposed walls ot which are formed with two pairs of opposed recesses at points adjacent to the inner terminus oit the groove and the periphery otl the insulator body to torni slots` which are wider than the groove and intervening limiting shoulders.

5. itin insulator comprising a body having Y i sing, a nod), i

the two a wire-receiving groove correspon in width to substantially the diameter p the eral surfaces oi? the insulator body and forming liiniting' shoulders between the widened portions, and an wire resting` between the limiting shoulders and oaving laterally expanded portions disposed opposite sides ot said lirnitinef shoulthnsv and engaged in the respective nidened portions ot the Lgroove.

in 'testimony whereoiE l have hereunto set iny hand in presence or two subscribing witnesses.

`Wfllililf^ild llitnesses: Y

L. el. S. NELSON, Cries. F. ltlniisoii.

by addressing; the oi atents,

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