US1220608A - Electric fitting. - Google Patents

Description

J. CUTHBERT.

ELECTRIC FITTING.

APPLICATION FILED JULY 26.1915.

1 20,608. Patented Mar. 27, 1917.

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JOHN CUTHBERT, OF CHICAGO, ILLINOIS.

ELECTRIC FITTING.

Application filed July 26, 1915.

To aZZ 207mm it may concern:

Be it known that I, JOHN CUTHBERT, 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 Electric Fittings, of which the following is a specification.

My invention relates to improvements in electrical fittings and has especial reference to receptacles for current conducting devices, such as plural fuse plugs, two wire extension cut outs branching from a three wire-circuit system.

One of the objects of my invention is to generally improve electric wiring fittings, of the class described, to cheapen the cost of their production; to increase the convenience of their installation, and render the parts and connections more accessible.

Other and further objects of my invention will become readily apparent, to persons skilled in the art, from a consideration of the following description when taken in conjunction with the drawings, wherein l igure 1 is a plan view of a fitting embodying my invention.

Fig. 2 is a section taken on line 22 of F 3 is a section taken on line of F 1.

Fig. 4} 1s a section taken on line 44t of Fig. 1.

Fig. 5 is a perspective view of a shell c0n nector, and neutral wire clamp l or connecting the screw shells of the two it'use plug receptacles to the neutral wire of a three wire system.

Fig. 6 is a similar view of a shell connector and positive or negative wire clamp for connecting the screw shells of one fuse plug receptacle to the positive or negative wire. One of these connectors is used to connect a receptacle to each of the outer or full potential wires.

In all the views the same reference char actors are employed to indicate similar parts.

In the selected embodiment of my invention 10 is a generally rectangular block or insulating material, such as porcelain, or the like, provided with shell receiving depressions or cavities 11 and three transversely extending grooves 12, 13 and 141-, to provide spaces within which to receive and secure the mains or branch means of a threewire system.

In each of the depressions 11 there is com Specification of Letters Patent.

Patented Mar. 27, 1917. Serial No. 4132?.

tained conducting parts, constituting receptacles, for electrical current conducting devices, such as iuse plugs, lamps or the like; there is a central perforation 15, within which to contain the central contact of the receptacle. The perforation 15 terminates in counter-sunk scrcw-receiving depressions 16 for screws, to hold the center contact in place.

The block is supported on four integral legs 17, 1H. 19 and 20 to increase the insulating qualities oil; the block and to provide wire containing space thereunder. These legs are longitudinally ierioratcd, as at 21. to receive screws :l'or attaching the device to a suitable support. The legs 18 and 2e are in line with and below the groove lihon each side o-l the longitudinal axis of the block. The legs 17 and 19 are centrally disposed or subslhntially in a plane with the longitudinal 'axis oi the device and extend a little into the vertical plane containing the grooves 12 and 11-. The perforations through the legs are countersunk, in each instance. as at to provide receptacles for the heads ol the attaching screws so as to remove them below contact with any of the metal portionsthat are contained upon the face of the fiXturel iXn ,over-hanging ledge Q-Q4 extends transvershly of the fixture on each side and under this ledge are pockets and 26 into which to insert the conducting wires, as 27. There is a slot 28, in each instance, made through the structure and which connects the pockets and 26, as the case may be. with the respective depression 11. between the inner and outer contact to be inserted therein. as clearly shown in Fig. .lnto the pockets. 25 and 26, and through the slots 98, the conducting wire is inserted for connection with the combined binding screw and central contact 2.).

There is a rim 30 around each of the depressions 11 which is cut away, as at 31, to permit the insertion of a downturned portion 32-32 of the shell connectors 33-33. The eoinicctm is connected to the shell 34 as clearly shown in Fig. 4-. A wire engaging elip 35, overlies a part of the connector, and clamped thereto by means of a clamping screw 36. The connector 33 is preferably joined to the shell 34-, by means of a hollow rivet 37. A double connector 31) joins two shells, one on. each side of the roove 13, the clip 35 is desi ned to con- Wire, of the three Wire sysls, lhe central contact Hill said wires by a means and .oe hereafter more fully des 3', which there is adapt d to connect .cle with the positive Wires, respectively, ."1 the grooves 12 and contact connection 29 forms or nay Patent No. 1,166,1lel, Quill i915, tilled aune 19th,

is specifically claimed.

'icle connector in this centrally pert! screw 29, at t w. h overl. Underlying Washer 43 havunturned and adapted to around the shank of the inserted through the storing notch 40 in the thus combining a Wire central contact member 11 one structure,

of the receptacle l L the depression 11, and v i slotted washer 45, material, cut away as at 46, man in Fi 'l, and overlying base flange 4-7 of the .nd the connectors lace the sleeve 3'? cut away portion shoulder 4:94 and the slot sitioi'i, The Wire its wire turning inside of the upper e 3*? and the parts grooves 5252 and 52 in. hich register with the grooves 12, in face of the block. /Vl1en e bloi a e placed edge to ed e d constitute su through which a the space problock. can he entirely conc front oi? th shells are to he inn" devices and having three grooves in.

the two projecting ledges and also within the spaces betv son the legs and under the four fuse receptacles,

Another advantage presented by the use of my block is in sub-main Wiring Where an 1 assembled. group of cut-outs are used and it is desired to wire up the mains of one, two or more cut-outs independently of the gen eral inains. It can be accomplished in my improved structure by utilizing the vertical grooves in the ends of the block, which registering with adjacent blocks provides circular openings through which Wires may be passed "from below the "under surface 01" the bolclrs to the proper connections thercabove. This feature of my invention per mits substantial contact oi? adjacent JlOC-llq, Without the necessity of spacing thei n span to provide space within which .Vll'QS" placed, as in the usual form of structures.

in any structure these openin a "e a present and if perchance the Worl should subsequently find it desirable place wires between adjacent blocks it would not be necessary'to dismount the entire number of blocks in order to provide such space as in former fittings and the trouble and expense necessitated by re-loeating the blocks, after such space has been of as in the expcnsivedrilling and tapping required by such reorganization, is avoided.

A further advantage is presented in the use of my blocks wherein two parallel rows of such 'hl cks may be placed with their ends substantially in contact, the outside bound ary Walls of the grooves 12 and 14 serving, as sullicient separation for the potentiated clamping members.

Another feature that will be appreciated by the employment of such devices is the fact that its dimensions are smaller than blocks usually found upon the market, With.- out sacrificing insulating separation.

Attention is called to they features of my improved device not for laudatory purposes but to more clearly differentiate it from bodiment of my invention for the purpose of clear disclosure, it is evident that changes may be made in the disposition, arrangement and configuration of the parts Within the scope of the appended claims.

Having described my invention, What ll claim is:

1. A circuit connecting fitting comprising a block of insulating material having" a plurality of depressions in its face, an equal number on each side of its median plane, for containing receptacles for current conduct face to cive Wires, one groove in. th

lilObl piano between a pair cl: depressions and one groove outside ofsaid depressions on each side of said-block.

2. A circuit connecting fitting comprising a block of insulating material having four depressions in its face, two on each side of its median line for containing receptacles for current conducting devices and having three grooves in its face to receive wires, one groove in the median plane between pairs of depressions and one groove beyond each pair of depressions. i i

3. A support for a circuit connecting fitting comprising a block of insulating material having a depression in its face within which to contain receptacle connecting con ductorsfor a current conducting device to be inserted therein and having a wire receiving groove in its face and a perforation under said groove through which to insert a wire into said depression.

4. A circuit connecting fitting comprising a block of insulating material having four depressions in its face, two on each'side of its median line for containing receptacles for current conducting devices and having three grooves in its face to receive wires, one groove in the median plane between pairs of depressions and one groove beyond each pair of depressions and vertical grooves in its edges registering with the face grooves said block having legs whereupon to support the fitting to provide wire space therebelow.

A circuit connecting fitting comprising a block of insulating material having four receptacles in its face for current conducting devices, and having three grooves in its face to receive wires, one groove in the. median plane between pairs of receptacles and one groove beyond each pair of receptacles and grooves in its edges registering withthe face grooves and a wire clamping clip in the central face groove connecting receptacles on each side thereof and a clamping clip in each of the side grooves connected to the other recoptacles, respectively, and a wire clamping binding screw in the center of each receptacle.

6. A support for a circuit connecting fitting, comprising a block of insulating material having two parallels ire receiving grooves and a series of alining depressions between the grooves in its face, within which depressions to contain conducting parts of receptacles for current conducting devices, said block being perforated under the side grooveswithin which perforations to insert wires into said depression. 7

7. A circuit connecting fitting-comprising a block of insulating material having a group of depressions in its face; a group of receptacles, for current conducting devices,

walls thereof, whereby to connect said Wires with selected receptacles.

8. An insulating block for electric fittings comprising a substantially rectangular body having receptacle receiving depressions in its face and having pockets in its edges with openings connecting said/pockets with said depressions and grooves in its face near each end leaving unbroken outer walls, said grooves located aboversaid pockets.

9. An insulating support for a circuit connecting fitting comprising a substantially rectangular block of insulating material having a depression in its face "within Which tocontain conducting parts, for connection with a current conducting device to beinserted therein, and having grooves in its face within which to receive wires and having a laterally extending aperture opening in the floor of said depression, through hich to insert a branch wire for connection to said current-conducting parts.

.10. As an article of manufacture, an insulating support for a receptacle, comprising a substantially rectangular block of insulating material having a depression in its face, and a groove in its face to receive a wire, and a later-all" extending perforation under said groove, tnrough which to insert a wire into said depression.

In testimony whereof I hereunto set my so f hand in the presence of two subscribing Wit- Fonr'in BAIN, MARY F. ALLEN.

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