US979651A - Electric-cable connection. - Google Patents

Description

L.H.OHUROH. ELECTRIC CABLE CONNECTION. APPLICATION PILED FEB.3, 1910.

9?9,651, Patented D ec.27, 1910.

WITNESSES. l/Vl/f/VTOR Mum fla a;

ATTORNEY TED STATES PATENT OFFICE.

LEWIS'H. CHURCH, OF STAMFORD, CONNECTICUT, ASSIGNOR' TO THE STANDARD ELEC- TBIC FITTINGS COMIANY, OF STAMFORD, CONNECTICUT, A CORPORATION OF CON- NECTICUT.

ELECTRIC-CABLE CONNECTION.

,5 necticut, have invented an Improvement in Electric-Cable Connections, of which the following is a specification.

This invention relates to connections for attaching electric cables to wall and ceiling v go fixtures such as outlet boxes and has for'its object to produce a connection of this character which shall be simple and inexpensive to produce, will lock the cable securely to the outlet box or other fixture and-which {145 may be easily and quickly operated to-grip l Figure 1 is an elevation of an outlet box part y or release a cable, and the invention consists in the construction and combination of parts which I will now describe, referring to a the accompanying drawing forming a part-- 'of.tltis. specification and using reference characters to indicate the several parts.

in section, illustrating the operation in connection therewith of'my novel-cable connection; 'Fig. 2 a perspective on an enlarged scale of the connection detached; Fig. 3 a'perspective'from anoppositepoint of view of the body of the connection with the locking block detached; and'Fig.' 4 is a so pers ective of the locking block detached.

. of production to the minimum, and a'single y novel connection consists simply of a body and a locking block, both of which may becast complete and ready for use from either iron or brass, thus reducing the cost screw passing through the body and engaging the locking block by which the cable is locked to the connection and the connection is locked to the outlet box or other fixture.

10 denotesan outlet box or any equivalent wall .or ceiling fixture which isprovided in itsbase with holes 11 to receive connections, and12 is an electric cable provided with an .armor 13.

: 14 denotes the body of my novel connecftion which is cylindrical in form, is adapted {To be passed into one of the holes 11 in the base of an outlet box or other similar fix- Q 'thre and is provided with an external shoul- Q der 1 of greater diameter than the hole in 7 the fixture which acts as a stop.for the connection when inserted in place to prevent forward movment. The opening 16 in the l Body, which is shown as placed eccentrically, 5. is large enough to recelve the armor of a Specification 'of Letters Patent.

Application filed February 3, 1910. Serial No. 541,866.

cable freely, the inner end of the armor resting against the head 17 of the body. The wall of the body is shown as made thinnest in one-place as at 18 and as gradually The head is provided. with a hole 19 which just receives a cable but not the armor. X This hole is also placed eccentrically to the 'body to correspond with the central open- 5 ing 16 with which the hole in-the head is concentric. In the side of the body where the wall is thickest is'a recess 20 extending to. the head which receives a wedge-shaped locking block indicated by 21, the thin end of the wedge lying toward the head-of the body and the incline indicated by 25 being outlet box or other fixture. A screw 22 passes freely through a hole 23 in the head and engages the locking block. The inner vided with a slot 24: which receives the screw freely, the engagement of the screw with the locking block being at the base of the slot, as clearly shown in vFig. 2 so as to permit thenecessary movement of the block in lock ing and unlocking.

The operation will be readily understood from the drawing.

In connecting a cable to an outlet box or other fixture, the screw is turned backward -so as to carry the locking block forward in the recess. The connection is then inserted from the front, -the armor is removed from the end of the cableand the stripped portion of the cable is then passed through the hole in the head of the body of the connection, leaving the armor in the central opening in the body, the end of the armor engaging the head. The screw is then turned forward drawing the locking block backward, that is toward the head of the body, theincline of the locking block engaging the wall of the hole in the outlet box, the eiiect of which upon the armorand also to lock the connection rigidly to the outlet box. Forward movement of the connection is preventedby the engagement of the shoulder on the body with the base of the outlet box and backward movement is prevented when the screw is tightened up by the engagement of the incline ofthe locking block with the wall of the hole in the outlet box. To remove the cable, it is simply necessary to turn the increasing in thickness in bothdirections.

Patented Dec. 27, 1910.

adapted to engage the wall of a hole in the end of the locking block is preferably prois to clamp the locking block down tightly outlet box.

Having thus described my invention, I claim: I

l. Aconnection of the character described, comprising a body adapted to engage a hole in a fixture and having a recess in one side,

' a Wedge-shaped locking block in said recess and a screw passing longitudinally through the body and en aging one end of the locking block whereby the latter is moved longitudinally and caused to grip a cable and the connection is locked to the fixture.

2. Aconnection of the character described,

comprising a body adapted to engage a- 'hole in a fixture and-having a shoulder adapted to engage the inner side of the fixture and a recess in one side, a wedge-shaped locking block in said recess and a screw passing longitudinally through the body and engaging one end of the locking block whereby the 1 latter is moved longitudinally and caused to grip a cable and the connection islocked to the fixture. 1

3. A connection of the character described, comprising a body adapted to engage a hole in a fixture and having an eccentrically located opening, a head, a hole in the head concentric with the opening in the body and a recess in the thick side ofits wall, a wedgeshaped locking block in saidrecess and a screw passing through the head and engaging the locking block, for the purpose set forth.

4. A connection of the character -described, comprising a body adapted to engage a hole in a fixture and having a recess in one side, a wedge-shaped locking block in said recess having a-siot ancLa screw passing longitudinally through the body and engaging one end of the locking 'block at the ase of the slot.

5. A connection of the character described comprising a body adapted to engage a hole in a fixture and having a shoulder adapted to engage the inner side of the fixture, an eccentrically disposed longitudinal opening in the body. a recess in the thick portion of the wall thereof, a wedge shaped. locking block in said recess, a longitudinally disposed screw passing through the periphery of the-body. and engaging one end of said block, whereby the latter is caused to grip a cable and the connection islockcd in the fixture.

6. The combination with a fixture having a hole, of a hollow cylindrical body adapted to enter the hole and having a shoulder of greater diameter than the hole, said body also having a central bore adapted to receive the armor of a cable and a cylindrical opening in the head of reduced diameter adapted to receive the cable only, a recess in one side awedge shaped locking block insaid recess, and a longitudinally disposed screw passing through the head and engaging one end of the locking block.

7. A coupling sheath, a slotted opening in the side theieof, a wedge fitted in the openlongitudinal direction into the opening to bind a cable within the sheath and to line the device within the fixture.

mg, and means for drawing the wedge in a S. The combination with a fixture having a hole, of a cable connection adapted to enter

Images