US888893A - Cord-grip for mechanical or other fixtures. - Google Patents

Description

PATEN T ED MAY 26, 1908. J. E. R. HAYES. I CORD GRIP FOR MECHANICAL 0R @TRIER FIXTURES.

APPLICATION FILED APB..1S. 1906.

:Unirse salaires PATENT OFFICE.

JOHN E. R. HAYES, OF MELROSE, MASSACHUSETTS.

CORD-GRIP FOR MECHANICAL OR OTHER FIXTURES.

erence being had to the accompanying draw-` ings, forming a part of this speciiication, in eX laining its nature.

'Iy invention relates to an improvement in cord gripping means or` devices especially adapted vto be used in connection with electrical A:Ceintures 'for relieving the terminals or binding posts from strains upon the conducting cord connected therewith, which strains upon the cord unless relieved mivht tend to stri Such a l the cor-d from the termina s. ga device is capable of use under a great variety oi -circumstaiices winch are well known to 'those skilled in art.

My invention consists essentially in a new way of obtaining the cord grip.

The essential object ci my mventionis to provide a grip which can be very economically made and one, also, which is especially effective in -periormmg the function., for which it is ada ted.

. In the drawings z-Fi ure 1 shows the d'evice in side elevation. Fig. 2, shows the same in vertical section with the operative arts thereof in a disengaging position wit respect to the 'conducting cord. Fig. 3 shows a vertical section oi the device with the operative parte in an engaging position with respect' to the conducting cord. Fig. 4 shows in vertical section a modification oi the device to which reference will hereinafter be made. Figs. 5 and 6 showin vertical section still further modiications, Fig. 5 showing the operative parts in disengaging posi-tion with respect to the conducting cord and Fig. 6 the same in engaginposition therewith. Fig. 7 shows in vcrticai section the same construction as shown .in Fig. 5, a larger sizeof 'conf ducting cord being used for engagement with which the device is peculiarly adapted, as

v .will hereinafter be explained.

5c A V'Before-referrin to that portion of the, de-

vice com rising t e cord grip proper, I shall refer to tie exterior orcasing thereof'wln'ch forms a part of or connects with some fixture of support, and by means'ef which the interior parte forming the cord grip proper are spcification of Letters Patent. pplication filed April 13, 1906. Serial N'u. 311,438.

Patented May 26, 1908.

brought into an'engaging position with res ect to the conducting cord, as will hereina ter be explained.

The form of casing which I have chosen to illustrate my invention consists of two hol- -l'ow parts a and a'l makin threaded connection with one another. have shown the `parta as screwin onto the part a),= which part a is preferaby provided with a milled, annularVprojecting or boss portion a.2 by which the screwing together of the parts may be more easily effected. The part al may l have a threaded extension a3 by which it ma be made fast tosome fixture of support, or it may be made a part of'such fixtureas circumstances of user may determine. The two parts forming' the casing may have any desired coniiguration. They are, however, made contracted in part, or so as to contain withinor carry with them the two opposing members or bushings b and b1 having holes orl openings in them throu h which the conducting cord C is passed. he member b has 'a hole b2 andthe member b* hase. hole b3.

together as shownin Fig. 3, then the mem-- bers`will t snugly together.A

'In the, grip-forming member 5i is a hole or opening -througlh which the conductin' cord is passed. T is hole b5 it is to be note is not 1n alinement with the holes through the other members through which the conducting cord passes, but is offset therefrom.

' The amount of the oiset is preferably such that when the member b4 1s loosely contained within thebushings, as is shown in Fig. 2, the conductin cord may be drawn throu h the member in either direction,

but when the threaded parts of the casing are tightened and the members ftsnugly together or in an engaging position as shown in hi 3, then the holes in the members being lofgset will overlap one another only art forming a contracted opening throu h w .ich the cord passes, on which accountt e edges lOl ` whileltheedgebnl vholes or openings modifie oi the members around the opening will grip the cord. 0f these gripping edges forming the contracted o ening or openings, as shown in Fig. 3, the e ge b of the member b'grips the cord on the one side op osite to the engagement of the ed e 57 o themember b4 engages the cord op osite tolthe engaging edge b9 .of the mem er b4. rI he essential point in this construction is that oi-olisetting the holes in the members through which the cord passes and making.y the oset such that when the members are bouvht together, the opening left will be so smsill that those portions' of the members forming the contracted opening will grip the'cord passing through it. y

In Fig. 4 I have shown a slight structural change in that but two members are employed to grip the cord, where before three members were so em loyed. These members are illustrated as 11 and t. They are fact bushings fitting snugly within the casing, having holes or openings throu h them, tbrou h which-the conducting cor extends fr is lille hole through the bushing b and bm is the hole through the bushing' bym.

are oiiset from one another so that when t ether the holes will lap by one another making a contracted opening, whereby 1portions of the edges of the members forming t e opening will bind the conducting cord in the manner before explained. In order that 'the conducting cord mayissue centrally from the casin or .bushing instead of at one side, as it woul naturally do with the hole in the bushing offset, the hole Z113 is made curved, this providinglthe offset and enabling the cord to issue in t e manner before indicated.

scribed shows that the invention may be practiced b a two-member construction,'the principle o operation remaining the same.

In li s. 5 and' I have shown a slightly construction y where there are employed three members within. the casing, as

above first ex lained," but the interposedmember has in it two offset holes oropenings for the reception of the conductin cord ini stead oi one hole. 615 represents t is member and b1 and t, res ectively, the holes or openings through it. .he operation ot' gri ping the conducting cord is substantially t e samel as iirst described. It makes a very de, sirable construction in that theconducting cord usually comprises two parts and by roviding the interposed grip-iorming mem- Der with two holes or openings in 'it a ositive grip is provided for each part o the conducting cord. This construction lastreirred to is eculiarly adapted for large conducting cor s made up of separate cords. A large cord "could notbe conveniently used ezhelein-thecbushing b1" These with the"\construction irst mentioned. l By splitting; the cord and loosening the separate cords within it the construction in which the interposed or grip-forming member has two holes within it can be very conveniently emloyed. Such` adaptation I have, shown in iig. 7 in which` the main conducting cord C is split, loosening the two separate cords c 'and c1 of which it is made up, and these are passed down throu h the grip-forming memer having two ho esl or openings within it, showing the adaptability of suoli a construction, especially for large cords.

,The usual operation of using the device is to pass the cord through one member inside one. part of the casing,xthen through the interposed. member, after which the cord is passed through the'member in the other part. of the casing, andthe two parts of the casing are then partly 'screwed together. The interposed member will still be loose within the casing on which accountthe cord can be drawn in either direction or to any )oint of desired position.` After which, upon further tightening the two parts of the casing, the grip-forming members are drawn snuffl to ether, ri' in@ the cord in the A e Y g PP e manner before explained.V e members are brought to- `The device is very simple and it provides a positive grip the eliciericy of which increases as the tension upon the cord increases. The grip-forming member can be very easily and economically made. The grip is obtained simply by forming holes or openings in said members. Moreover, when used with an electrical conducting cord the members may be made of an insulating material providing an absolute insulation. y

ent of the United States 1. A device of the character specified hav-l ing cord-grip ing-members each with an opening in it or the reception`of a cord passing through said membersand-which-openings in said members are oifset with'res ect to one another whereby there is obtaine be- Having thus fully described my invention, I claim and desire to secure by Letters Pat- The preferable construction is the one l first referred to,although the one-just de- A tween the members a contracted opening.. when .said members are brought together and through whichv the cord extends, said contracted opening being formed byopposing portions of said separate members around the .said openings therein which act to bindand hold said cord, and meansfor bringing the members 'togetherfor' forming such contracted opening.

2f. A device o'r' the character speciiied having a casing, cord-grippingmembers adj acent' toone another in sai casing,- said members eachhaving an' opening in ittor .admitting fthe passage'of a cord throu h said members and which openings -in sai membersare so arranged relatively to' one anoth'eiil that opposingportions of said members forming in part t e saidnopgnings'theremgnay bind said cord between said members when the members are made to approach one another 1n y lsaid casing.

3. A device of the character specified having .a casing, grip-forming memberstting snugly within Asaid casing against else than -a longitudinal movement towards and from one another, said'members each having V,an opening in it for the reception of a cord passing through said members, which openings are out o line with one anotherbut overlapping one another in part whereby said members may, when said members are made to approach one another in said casing-grip thereof forming x members inside said casing,

, each havin spect to one another whereby there -is formed -'between the members, when'the members 'are brought together,va contracted opening through which the cord extends, said contracted opening being formed` by oppos' portions of said separate members aroun said openings therein which actto grip and holdsaid cord and which members are Iopemng by whereby contracted rip-forming brought together to form said contracted screwing together the separate parts of the casing;

. 5. A device of t e character s ecified having grip-forming members eac having an .openlng in it by which acord passes through said members, the opening inthe linter osed oneA of said membersbeing offset wit respect to the openings-in the others of said members but overlapping thes'ame in art openings are'formedpbe-` tween said members when the members are brought together and through which contracted openings the cord is adapted to eX- tend to be gripped andheld by opposing portions of said members forming in part the openings therein'.

6. A device of the character specified having gri -orming members'with openings in them t rough which` a cord passes, on of which members has a therein offset with respect to the openings 1n the other of said members, .whereby con tracted o enings are formed when-the members are roug 1t together into an engaging position, and means for bringing them thus together into an engaging position.

' j JOHN. E. n. HAYES.

In presence of- GEORGE O. G. COALE, M. E. FLAIHERTY.

plurality` of openings 'l

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