US1710269A - Electrical plug - Google Patents

Description

April 23, 1929- R. H. OLLEY 1,710,269

ELECTRI CAL PLUG Filed Oct. 13, 1927 FIGJ I NVEN TOR. 2 a 21 i MAW/M 22 ATTORNEYS.

Patented Apr. 23, 1929.

UNITED STATES PATENT OFFICE.

RAYMOND n. OLLEY, or SYRACUSE, new YORK, ASSIGNOB T0 cnovsrtnmns courany, or SYRACUSE, NEW YORK, A CORPORATION or new "roux.

ELECTRICAL PLUG.

Application filed October 13, 1.927. Serial No. 225,909.

This invention relates to electric plugs and plug receptacles and has for 1ts ob ect a plug which is particularly simple and economical in construction and consists of a small number of compactly arranged .parts which are held assembled by a single fastening member.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a longitudinal sectional view, partly in elevation, of this plug, the contiguous portion of a plug receptacle being also shown.

Figure 2 is a sectional View, partly broken away, of parts of the plug shown in Figure 1, the component parts being shown as separated.

Figure 3 is an elevation, partly broken away, of a plug showing the locking means.

Figures 4 and 5 are, respectively, plan Views of the blocks of insulation which support and retain the plug terminals in position.

Figures 6 and 7 are, respectively, a lon itudinal sectional view and a plan view 0 a modified form of one of the sections of the plug.

This plug comprises generally, a case consisting of tubular sections, one telescoping within the other, plug terminals having wire engagin ends or binding devices associated therewit supporting and retaining means for the plug terminals, the supporting and retaining means being slidably mounted in the case or the sections thereof and the plug terminals being slidably mounted in the supporting and retaining means, and means for locking the sections of the case and the parts within the same in assembled relation.

1 and 2 are, respectively, the tubular sections of the case, the section 1 telescoping within the section 2, the section 1 fitting within a socket S and the section 2 having a nipple for connection to a handle or other support through which the service wires extend. The service wires extending into the section 2 through the nipple 3.

4 designates the plug terminals and 5 is a grounding terminal. The plug terminals 4 are supported and retained in position by blocks of insulation located, respectively in the sections 1, 2, there being one block in each section, and the blocks being slidable into the sections and the terminals slidable into the blocks.

6 designates the block of insulation in the section 1, this being formed with passages 7 therethrough in which the plug terminals 4 are located. The block 6 is located in the section 1 by an internal shoulder in the section 1, this shoulder being here shown as in the form of an inwardly extending lug 8 formed in the section 1 and fitting a complemental recess 9 in the block, the recess '9 opening through the inner end of the block and terminating short of the outer end. The closed outer end provides a shoulder for abutting against the shoulder 8 and limiting the inward movement of the block 6 and hence determining the location of the block 6. The lug 8 is formed with a passage 10 in which the grounding terminal 5 is located.

11 designates the block within the section 2. This is also formed with passages for the terminals 4 or the wire receiving ends thereof and also with a. passage 12 for receiving the wire receiving end of the ground terminal 5. This block 11 also having an axial non-circular recess 13 which receives a projection 14 on the block 6. The recess 13 breaks through the walls of the terminal passages in the block 11 so that the recess 13 together with the passages in which the wire receiving ends of the terminals 4 are located, constitute a slot. The terminals 4 are held from endwise displacement by shoulders 15 thereon interposed between the blocks and these shoulders are located in recesses or countersinks 16 formed in the blocks or one of them. The shoulders are non-circular or hexagonal and the recesses also are correspondingly shaped. Also, the ends of the passages 7 for the plug terminals in the block 6 are formed with countersinks for receiving interfitting projections 17 on the block 11.

The block 11 slidably fits within the bore of the section 2 and abuts against an annular shoulder 18 which limits the inward movement of the block and thus determines the position thereof.

The inner or wire receiving ends of the plug terminals 4 are preferably formed with axially extending bores 19 for receiving the ends of the wires and in which the wires are soldered although as seen in Fi uresb and 7, these bores may receive threa ed bmdmg screws20 located in recesses 21 in the block 22 col nding to the block 11. v J

The means for holding the sections 1, 2 and the parts contained thereby in assembled relation is located within the section 1 and operable or accessible through the open end thereof. This means as here shown is a wedge 23' which is operated into and out of wedging position by an operating member here shown as a screw 24 extending lengthwise through the block 6 with its head toward the outer end of the section 1, the screw threading through the wedge and the wedge having a cam or inclined surface at one side coacting at 25 with a similarly inclined plane surface on the block 6.

Obviously, during tightening of the screw which threads into the wedge, the wedge due to the inclined surfaces will be forced laterally into snug engagement with the inner annular face of the section 1, this inner annular face being smooth or free from projections or obstructions.

The section 1 is formed with a slot 26 for permitting the Wedge to engage the inner Wall of the section 2. Preferably, the annular wall of the section 2 and of the wedge nut coacting therewith are slightly beveled.

In assembling, the service wires are passed through the nipple 3 and the block llthreaded on the wires. The block 6 is placed in the section 1 through the outer end thereof until it abuts against the shoulder and the plug terminals 4. and grounding terminal 5 placed in position therein and also, the

wedge nut threaded on the screw 22 with the wedge in the slot 26. The wires are then attached to the proper terminals 4, 5 and the block 11 moved along down to the wires into a position against the end of the section 1 and the sections 1 and 2 then brought together and the screw 24 tightened, the screw 24 and the wedge nut being the only fastening means required to hold all parts assembled except when the binding screws for the wires are used as shown'in Figure 6.

The section 1 is provided with a suitable external shoulder 28 fitting a complemental internal groove 29 in the section 1 for holding the sections from relative rotation. The section 1 is also provided with another ex ternal shoulder 30 for fitting a complemental groove in the socket members in order to bring terminals of like plurality of the plug and socket into engagement.

The socket members may be of any suitable form, size and construction and is formed with a suitable body 31 of insulation for fitting into the tubular section 1 and carrying socket terminals 32 for receiving the pronged ends of the plug terminals 4.

What I claim is:

1. An electric plug including a case com- 1,71o,2ee

prising two tubular sections,-one telescoping into the other, the outer section having an unobstructed bore for receiving the inner section telescoping thcreinto, and means located entirely within the sections for securing them together, said means including an operating member accessible through the open outer end of the inner section.

2. An electric plug including a case comprising two tubular sections, one telescoping into the other, the outer section having anunobstructed bore for receiving the inner section telescoping thereinto, and means located entirely within the sections for securing them together, said means comprising a wedge carried by the inner section and coacting with the inner smooth bore of the outer section, and an operating member for the wedge accessible through the open outer end of the inner section.

3. An electric plug including a case having tubular telescoping sections, a block of insulation slidably mounted in the inner section and having passages therethrough, plug terminals extending through said passages and provided with means for engaging the block to hold them from sliding entirely through the passages and locating them relatively to the block, a block of insulation slidably fitting the outer section and having wire passages therethrough, the wire passages being arranged to receive the inner wire engaging ends of the plug terminals, and means for holding the sections of the case in assembled relation and thereby holding the blocks of insulation and the plug terminals in position.

4. An electric plug including a case having tubular telescoping sections, a block of insulation slidably mounted in the inner section and having passages therethrough, plug terminals extending through said passages and provided with means for engaging the block to hold them from sliding entirely through the passages and locating them relatively to the block, a block of insulation slidably fitting the outer section and having wire passages thcrethrough, the wire passages being arranged to receive the inner wire engaging ends of the plug terminals, one of the blocks of insulation having a projection and the other having a recess for receiving the projection when the parts are assembled, and means for holding the sections of the case in assembled relation and thereby holding the blocks of insulation and the plug terminals in position.

5. An electric plug comprising a case having tubular telescoping sections, a block of insulation slidably mounted in the inner section and having passages therethrough, plug terminals extending through said passages and provided with means for engaging the block to hold them from sliding entirely through the passages and locating them relawire engagin tively to the block, a block of insulation slidably fitting the outer section and having wire passages therethrough, the wire passages being arranged to receive the inner wire en gaging ends of the plug. terminals, the block of insulation within the inner section having an axial projection, and the block within the outer section having a recess for receiving said projection, and means for holding the sections of the casein assembled relation and thereby holding the blocks of insulation and the plug terminals in position.

6. An .electric plug comprising a case having tubular telescoping sections, a block of insulation slidably mounted in the inner section and having passages therethrough,

plug terminals extending through said pas-.

sages and provided with means for engaging the block to hold them from sliding entirely through the passages and locating them relatively to the block, a blockof insulation slidably fitting the outer section and having wire passages therethrough, the wire passages being arranged to receive the inner ends of the plug terminals, the block wit in the outer section abutting against the end of the inner section of the case when the parts are assembled, and means for holding the sections of the case in assembled relation and thereby holding the block of insulation and: the plug terminals 1n position.

7 An electric plugcomprising a case having tubular telescoping sections, a; block of insulation slidably mounted in the inner section and having passages therethrough, plug terminals extent ing through said passages and provided with means tor engaging the block to hold them from sliding entirely through the passages and locating them relatively to the block, a block of insulation slidably fitting the outer section and having wire passages therethrough, the wire passages being arranged to receive the inner wire engagin g ends of the plug terminals, the blocks having an interfitting recess and projection, and the block within the outer section of the case abutting against the end of the inner section of the case when the parts are assembled, and means for holding the section's of the case in assembled relation and thereby holding the blocks of insulation and the plug terminals in position. I i

8. An electric plug comprising a case having tubular telescoping sections, a single block of insulation mounted in'each section, plug terminals slidably mounted in'the block in the inner section, the block inthe outer section normally holding the terminals from displacement, and means carried by the block in the inner section for locking the sections together.

9. An electric plug comprising a case hav- .ing tubular telescoping sections, terminal,

means within the inner section, for holding the sections to ether and the parts therein in an assemble relation, said holding means.

comprising a wedge coacting with the inner face of the outer section and a Wedge operating member accessible through the outer end of the inner section.

11. An electric plug comprising a case havin tubular sections, one telescoping into the ot er, a block of insulation mounted in each section and slidably mounted therein, the blocks having aligned passages therethrough, terminals mounted in the passages and having shoulders located between the blocks for holding the terminals from displacement, and means for holding the sections together.

12. An electric plug comprising a case having tubular sections, one telescoping into the other, a block of insulation mounted in each section and slidably mounted therein, the blocks having aligned passages therethrough, terminals mounted in the passages and having shoulders located between the blocks for holding the terminals from displacement, a shoulder for locating, the position of the block in the inner section, the block in the outer section abuttingagainst the inner end ofthe inner section, and the outer section having a shoulder for locating the block therein, andmeans carried by the block within the inner section for securing the sections together.

In testimony whereof, I have hereunto signed my name, at Syracuse, in the county of Onondaga and in the State of New York, this 10th day of October, 1927.

RAYMOND H. OLLEY.

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