USRE22028E - Electrical plug device - Google Patents

Electrical plug device Download PDF

Info

Publication number
USRE22028E
USRE22028E US22028DE USRE22028E US RE22028 E USRE22028 E US RE22028E US 22028D E US22028D E US 22028DE US RE22028 E USRE22028 E US RE22028E
Authority
US
United States
Prior art keywords
plug
housing
view
contact
plug device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Publication date
Application granted granted Critical
Publication of USRE22028E publication Critical patent/USRE22028E/en
Expired legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R27/00Coupling parts adapted for co-operation with two or more dissimilar counterparts
    • H01R27/02Coupling parts adapted for co-operation with two or more dissimilar counterparts for simultaneous co-operation with two or more dissimilar counterparts

Definitions

  • Ihe present invention relates to improvements in electrical plug devices, and has for an object to provide in such a device a plug and contact unit which may be formed of one piece of metal, Will be inexpensive and reliable in construction, and will provide a positive, rm, and reliable contact.
  • a further object is to provide a construction in which the plug contact units may be assembled with great facility and which when in use will be securely held in the insulating housing against ⁇ displacement and distortion through the engagement therewith of the plug portions of a similar plug device.
  • Another object is to provide a housing which may be conveniently molded, and which will have the desirable characteristics of light weight, compactness and strength, and which will at the same time provide ample room for the convenient'attachment of wires.
  • a further object is to provide an electrical plug device in which the plug and contact units each consist of a strip of metal bent upon itself to form a double thickness plug portion, the two sides of the .strip being provided at the base of the plug portion with outwardly bowed portions from which are extended single thickness contact portions, these latter converging into contact with each other when not engaged by a plug portion of an adjacent plug device, and adapted to be spread through such engagement into substantially parallel or surface conforming relation, whereby they engage the sides of the inserted plug portion with surface contact.
  • Fig. 1 is a side elevation of an electrical plug device, embodying the invention, and showing in dot-and-dash lines another plug device inserted therein.
  • Fig. 2 is a plan view of the device.
  • Fig. 3 is a vertical sectional view, taken along the line 3 3 of Fig. 1.
  • Fig. 4 is a vertical sectional view, taken along the line 4 4 of Fig. 3. i
  • Fig. 5 is a perspective View of the plug andresilient contact unit, according to the invention.
  • Fig. 6 is a. side elevation of the insulating housing employed.
  • Fig. 7 is a plan View of the insulation housing.
  • Fig. 8 is a plan View of the closure plate employed.
  • Fig. 9 is a plan view of an insulating housing, employed in a modified form of the invention.
  • Fig. 10 is a plan view ployed with the housing as shown in Fig. 11.'
  • FIG. 1l is a vertical sectional view of the modified form ofthe invention employing the housing and cover platefshown in Figs. 9 and 10.
  • Fig. 12 is a side elevation thereof.
  • Fig. 13 is a side elevation turned 90 from the side, as shown in Fig. 9, and with the closure plate removed.
  • Fig. 14 is a perspective View of the clamping ring employed in the modification shown in Figs. 9 to 13.
  • Fig. 15 is an elevation of a portion of an insulation housing similar to that shown in Fig. 13, but with a modified form of clamping lug.
  • Fig. 16 is a fragmentary perspective View of a modified form of clamping ring for cooperation with the lug illustrated in Fig. 15. i
  • Fig. 17 is a top plan view, partially broken away, of an electrical plug device according to a further modified form of the invention.
  • Fig. 18 is a side elevation thereof.-
  • Fig. 19 is a side elevation, turned 90 from the side as shown in Fig. 18.
  • Fig. 20 is a top plan View of the insulating housing employed. l f .i
  • Fig. 21 is a sectional view, taken along the line 2I-2I of Fig. 19, and showing rin dot-and-dash lines another plug device inserted therein.
  • Fig. 22 is a perspective View of the plug and resilient contact unit employed inthe modication illustrated in Figs. 17 to 21.
  • Fig. 23 is a plan view of the closure plate employed.
  • the insulating housing or shell of the plug device is preferably molded from hard rubber, Bakelite, or other suitable material, and is of generally cylindrical hollow form, comprising a cylindrical side wall I I.) and a base II, the side wall having at its. upper end an outwardly'offset cylindrical portion I2, connected to the main cylindrical portion III by an annular rib I 3, which also serves the triple purpose of providing a ledge for protecting the edge of the ⁇ clamping ring, a continuous annular reinforcement, and i a finger engaging portion for enabling the plug to be conveniently inserted or removed from a socket element.
  • a lead wire opening I4 is provided in the side wall I0 extending downwardly from the upper edge, its upper end portion being spanned bythe rib I3. It will be observed that the inner wall of the portion I2 is substantially flush with the outer surface of the portion Ill, so
  • the opening I4 may be formed by a part on the mold core fromwhich the housing may be stripped by a straight pull.
  • a vertical partition wall I5 is provided within the opening I4.
  • the edge of this cutout is designed so that it may also be formed by a portion of the mold core and will not interfere with the stripping of the housing shell from the core by a straight pull.
  • the upper edge of the portion I2 is provided with a series of projections
  • the arrangement of this thread in relation to the rest of the housing structure is such that it will not interfere with the strippingv of the housing shell from the mold by a straight pull, the material being sufllciently elastic at the moment of stripping to permit this.
  • each side of the partition wall I5 there is provided in the cornpartment at each side of the partition wall I5 a relatively thick platform portion I9, having a rectangular recess therein and in the base of which is formed a plug receiving slot 2
  • the side walls of the recesses 2.0 are beveled at the upper portions, as at 22, for guiding the contact portions of the plug and contacting units therein, and the exterior edges of the slots 2
  • a pair of plug and contact devices or units are secured in theA insulating housing, and each is preferably formed by bending a strip of suitable metal upon itself, as at 24, to form a double thickness substantially rigid plugging portion 25, the two legs being bowed outwardly at the base of the plugging portion, as at 2G and 21, and extended in converging relation to form contact portions 28 and 29.
  • the bowed portions 26 and 21 provide spring ends for the contact portions 28 and 29, so that they may be sprung apart into parallel plug contacting relation, without bending them between their ends, the spring action taking place in the bowed portions.
  • the contact portions 23 and 23 are flared outwardly, as at 30 and 3
  • the plugging portion 25 is provided adjacent the bowed portions 26 and 21 with an extended threaded hole 32 in which a binding post screw 33 is screwed.
  • a binding post screw 33 is screwed.
  • the side leg at the head side of the screw is punched with a holek slightly larger than the screw and the other side leg is pierced and extended and the opening therein threaded.
  • the plugging portion 25 is provided near its upper end with a hole 34, and the contact portions 28 and 29 are provided with inwardly pressed bosses 35 and 36 respectively, which are adapted to snap into the hole 34 of a similar plug unit when the latter is plugged into the device, as shown in Fig. 1.
  • the cover plate 31 is provided with a pair of slots 38-38 in line with the slots 2
  • the cover plate is clamped down upon the housingshell by means of a threaded and flanged clamping ring 40, engaged with the thread I8 of the portion I2.
  • the plugging portions 25 are inserted through the slots 38--38 of the cover plate in which they preferably engage with a snug fit, and the conhereinafter more fully appear.l
  • Figs. 9 to 14 I have illustrated a modification; similar in general arrangement to the form illustrated inv Figs. 1 to 8, but in which the housing shell
  • the under side 42 is slightly inclined to form the projection into a wedge, and at the lower end of the incline there is provided a stop lug 43.
  • the closure plate 44 is provided with slots 45-45 in alignment with the slotsv 2 I-2I of the base, and at its periphery is provided with cut outs 46 adapted to interlockingly engage the lugs 4
  • a flanged clamping ring 41 having an outer vertical side and upper and lower laterally disposed flanges is provided in its lower flange with a series of cutouts 48 adapted to be engaged over the lugs 4I and upon turning of the ring to have one end brought into wedging engagement with the inclined under surface 42 of the lugs to thus clamp the closure plate in place, the stop lug 43 limiting the turning of the ring.
  • a cut out 49 in the side and bottom flange registers with the lead wire openy ing I4 in the clamped position of the ring.
  • FIGs. 17 to 23 I have illustrated a further modification of the invention comprising an insulating cup-shaped housing shell 5I, the side wall of which is cylindrical at its upper portion and contracted toward the base so that it may be conveniently gripped by the fingers.
  • a post 52 is integrally formed centrally of the base, its upper end vbeing slightly below the upper edge of the side wall, and reinforcing and guide walls 53 and 54 extend in opposite directions from opposed sides of the post to the side wall.
  • Diametrically opposed cut outs 55 and 56 for lead rwires are provided. in the upper end of the side wall, and cutouts 51 and 58 are provided in the upper ends of the walls 53 and 54 for extending lead wires from the binding posts to said openings 55 and 5G.
  • the side wall is provided adjacent the walls 53 and 54 with vertically disposed channels 59 and 6I), extending downwardly from the top edge and terminating in laterally disposed shoulders or ledges 6I and 62 respectively.
  • slots 53 and B4 disposed at-right angles to the walls 53 and 54.
  • pair of plug devices or units are secured in the housing, and 'each is preferably formed by bending a-strip of suitable metal upon itself,
  • the contact portion 69 is bent laterally, as at 1l, and is provided with an extended threaded hole 12 to receive a binding post screw 13, and the other contact portion is iiared at its ends, as at 1I)a to provide a plug guiding surface.
  • the plugging portion 6B is provided near its upper end with a hole 13, and the contact portions 69 and 10 are provided with inwardly pressed bosses 14 14 respectively, which are adapted to snap into the hole 13 of a similar plug unit; when the latter is plugged into the device, as shown in dot-and-dash lines in Fig. 21.
  • the guide Walls 53 and 54 which extend to the closure plate 16 adjacent th'e slots 80 and 8
  • the plugging portions 66 are projected through the slots 63 and 64 in the base of the housing, the shouldered abutting the base at the inner are engaged in ledges El and the channels 62 in such relat1on as to position
  • a cover plate 16 is seated within the open end of the housing upon the upper end of the post 52 and is providedwith projecting lips 11 and 18 which engage the lead wire openings, the lead wire openings preferably having ledges 19-19 upon which the lips rest.
  • are provided in the plate in line with the slots 63 and 64 of the base, and a center hole 82 is provided between them in which the securing bolt 83 is engaged, this bolt being extended through a passage 84 in the post 52, and having a nut 85 upon its threaded end disposed in a countersunk recess 86 inthe lower end of the post.
  • a housing shell of insulating material having spaced end walls, one or said end walls having a pair of transversely aligned plug receiving openings and the other ol.' said end walls having a pair of transversely aligned plug positioning slots having their long sides parallel to each other, said housing shell having pockets disposed between said end walls and said plug receiving openings and said be spread at its two sides into parallel relation in surface contact with said inserted plug portion.
  • a cup shaped insulating material having a LANCASTER P. CLARK, JR.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)

Description

Feb. 17, 1942. L. P. CLARK, v.IR
ELEGTRIGAL11=LUG DEVICE Original Filed April 13, 1952 3 Sheets-Sheet 1 Feb. 17, 1942. L. P. CLARK, JR
lle'LaECTRI'.CMI` PLUG DEVICE 3 Sheets-Sheet 2 Original Filed April 15, 1932 Feb. 17, 1942. l.. P. CLARK, JR
LEGTRIGAL'PLUG DEVICE Original Filed April 13. 193?. 3 Sheets-Sheet 3 Reissued Feb. 17, 1942 Re. 22,028 UNITED STATES PATENT OFFICE 22,028 v ELECTRICAL PLUGDEVICE Lancaster P. Clark, Jr., Bridgeport, Conn., assignor t Electric Plug, Incorporated, Bridgeport, Conn., a corporation of Connecticut Original No. 1,979,958, dated November 6, 1934, Serial No. 604,947, April 13, 1932. Application ior reissue May 3, 1941, Serial No. 391,812
3 Claims.
Ihe present invention relates to improvements in electrical plug devices, and has for an object to provide in such a device a plug and contact unit which may be formed of one piece of metal, Will be inexpensive and reliable in construction, and will provide a positive, rm, and reliable contact. A further object is to provide a construction in which the plug contact units may be assembled with great facility and which when in use will be securely held in the insulating housing against` displacement and distortion through the engagement therewith of the plug portions of a similar plug device. Another object is to provide a housing which may be conveniently molded, and which will have the desirable characteristics of light weight, compactness and strength, and which will at the same time provide ample room for the convenient'attachment of wires. i
A further object is to provide an electrical plug device in which the plug and contact units each consist of a strip of metal bent upon itself to form a double thickness plug portion, the two sides of the .strip being provided at the base of the plug portion with outwardly bowed portions from which are extended single thickness contact portions, these latter converging into contact with each other when not engaged by a plug portion of an adjacent plug device, and adapted to be spread through such engagement into substantially parallel or surface conforming relation, whereby they engage the sides of the inserted plug portion with surface contact.
With the above and other objects in view embodiments of the invention are shown in the accompanying drawings, and these embodiments will be hereinafter more fully described withl reference thereto, and the invention will be finally pointed out in the claims. f
In the drawings:
Fig. 1 is a side elevation of an electrical plug device, embodying the invention, and showing in dot-and-dash lines another plug device inserted therein. l
Fig. 2 is a plan view of the device.
Fig. 3 is a vertical sectional view, taken along the line 3 3 of Fig. 1.
Fig. 4 is a vertical sectional view, taken along the line 4 4 of Fig. 3. i
Fig. 5 is a perspective View of the plug andresilient contact unit, according to the invention.
Fig. 6 is a. side elevation of the insulating housing employed.
Fig. 7 is a plan View of the insulation housing. Fig. 8 is a plan View of the closure plate employed.
Fig. 9 is a plan view of an insulating housing, employed in a modified form of the invention.
Fig. 10 is a plan view ployed with the housing as shown in Fig. 11.'
of the closure plate em` Fig. 1l is a vertical sectional view of the modified form ofthe invention employing the housing and cover platefshown in Figs. 9 and 10. i
Fig. 12 is a side elevation thereof.
Fig. 13 is a side elevation turned 90 from the side, as shown in Fig. 9, and with the closure plate removed.
Fig. 14 is a perspective View of the clamping ring employed in the modification shown in Figs. 9 to 13.
f Fig. 15 is an elevation of a portion of an insulation housing similar to that shown in Fig. 13, but with a modified form of clamping lug.
Fig. 16 is a fragmentary perspective View of a modified form of clamping ring for cooperation with the lug illustrated in Fig. 15. i
Fig. 17 is a top plan view, partially broken away, of an electrical plug device according to a further modified form of the invention.
Fig. 18 is a side elevation thereof.-
Fig. 19 is a side elevation, turned 90 from the side as shown in Fig. 18.
Fig. 20 is a top plan View of the insulating housing employed. l f .i
Fig. 21 is a sectional view, taken along the line 2I-2I of Fig. 19, and showing rin dot-and-dash lines another plug device inserted therein.
Fig. 22 is a perspective View of the plug and resilient contact unit employed inthe modication illustrated in Figs. 17 to 21.
Fig. 23 is a plan view of the closure plate employed. v
Similar reference characters indicate corresponding parts throughout the several figures of the drawings. v
Referring to the drawings, the insulating housing or shell of the plug device, according to the embodiment of the invention illustrated in Figs. 1 to 8, is preferably molded from hard rubber, Bakelite, or other suitable material, and is of generally cylindrical hollow form, comprising a cylindrical side wall I I.) and a base II, the side wall having at its. upper end an outwardly'offset cylindrical portion I2, connected to the main cylindrical portion III by an annular rib I 3, which also serves the triple purpose of providing a ledge for protecting the edge of the `clamping ring, a continuous annular reinforcement, and i a finger engaging portion for enabling the plug to be conveniently inserted or removed from a socket element. A lead wire opening I4 is provided in the side wall I0 extending downwardly from the upper edge, its upper end portion being spanned bythe rib I3. It will be observed that the inner wall of the portion I2 is substantially flush with the outer surface of the portion Ill, so
-that in molding the housing the opening I4 may be formed by a part on the mold core fromwhich the housing may be stripped by a straight pull. A vertical partition wall I5 is provided within the opening I4.
formed a single narrow,
2 the housing shell in the central plane intersecting the center of the lead wire opening, a lead wire cut out I6 being provided therein adjacent The edge of this cutout is designed so that it may also be formed by a portion of the mold core and will not interfere with the stripping of the housing shell from the core by a straight pull. The upper edge of the portion I2 is provided with a series of projections |1 for interlockingly engaging cutoutsin the closure plate, as will Upon the outer side of said portion I2 `there is slightly projecting, large pitch screw thread I8. The arrangement of this thread in relation to the rest of the housing structure is such that it will not interfere with the strippingv of the housing shell from the mold by a straight pull, the material being sufllciently elastic at the moment of stripping to permit this.
In the base II there is provided in the cornpartment at each side of the partition wall I5 a relatively thick platform portion I9, having a rectangular recess therein and in the base of which is formed a plug receiving slot 2|. The side walls of the recesses 2.0 are beveled at the upper portions, as at 22, for guiding the contact portions of the plug and contacting units therein, and the exterior edges of the slots 2| are beveled, as at 23, to guide the entrance of plugs therein. y
A pair of plug and contact devices or units are secured in theA insulating housing, and each is preferably formed by bending a strip of suitable metal upon itself, as at 24, to form a double thickness substantially rigid plugging portion 25, the two legs being bowed outwardly at the base of the plugging portion, as at 2G and 21, and extended in converging relation to form contact portions 28 and 29. The bowed portions 26 and 21 provide spring ends for the contact portions 28 and 29, so that they may be sprung apart into parallel plug contacting relation, without bending them between their ends, the spring action taking place in the bowed portions. the contact portions 23 and 23 are flared outwardly, as at 30 and 3|, to provide plug guiding surfaces. The plugging portion 25 is provided adjacent the bowed portions 26 and 21 with an extended threaded hole 32 in which a binding post screw 33 is screwed. In forming the extended threaded hole the side leg at the head side of the screw is punched with a holek slightly larger than the screw and the other side leg is pierced and extended and the opening therein threaded.
The plugging portion 25 is provided near its upper end with a hole 34, and the contact portions 28 and 29 are provided with inwardly pressed bosses 35 and 36 respectively, which are adapted to snap into the hole 34 of a similar plug unit when the latter is plugged into the device, as shown in Fig. 1.
The cover plate 31 is provided with a pair of slots 38-38 in line with the slots 2|-2I in the base, and in its periphery there is provided a series of cutouts 39 adapted to interlockingly engage the projections I1 at the upper edge of the housing shell. The cover plate is clamped down upon the housingshell by means of a threaded and flanged clamping ring 40, engaged with the thread I8 of the portion I2.
In assembling the plug and contact units the plugging portions 25 are inserted through the slots 38--38 of the cover plate in which they preferably engage with a snug fit, and the conhereinafter more fully appear.l
thereupon clamped in place by the clamping ring 4I). In practice the lead wires will be attached to the units before they are inserted in the housing. It will be observed that the pockets 2li-20 position the units vertically while at the same time permitting the contact portions 23-29 to be separated upon insertion of a plug between them, asshown'in dot-and-dash lines in Fig. 1.
In Figs. 9 to 14 I have illustrated a modification; similar in general arrangement to the form illustrated inv Figs. 1 to 8, but in which the housing shell |05 is provided at its upper end with a series of lugs 4I projecting upwardly and also projecting laterally and extending for a short distance downwardly upon the outer surface. The under side 42 is slightly inclined to form the projection into a wedge, and at the lower end of the incline there is provided a stop lug 43.
The closure plate 44 is provided with slots 45-45 in alignment with the slotsv 2 I-2I of the base, and at its periphery is provided with cut outs 46 adapted to interlockingly engage the lugs 4| of the housing shell. A flanged clamping ring 41 having an outer vertical side and upper and lower laterally disposed flanges is provided in its lower flange with a series of cutouts 48 adapted to be engaged over the lugs 4I and upon turning of the ring to have one end brought into wedging engagement with the inclined under surface 42 of the lugs to thus clamp the closure plate in place, the stop lug 43 limiting the turning of the ring. A cut out 49 in the side and bottom flange registers with the lead wire openy ing I4 in the clamped position of the ring.
The ends of In the modification illustrated in Figs. 15 and 16 the under surface of the lug 4Ia is corrugated, and the lower flange of :the ring 41 is provided with a pressed in boss 50 adjacent the end of the cut out 48 for yieldingly engaging the corrugations, the stop lug 43 limiting the turning of the ring.
In Figs. 17 to 23 I have illustrated a further modification of the invention comprising an insulating cup-shaped housing shell 5I, the side wall of which is cylindrical at its upper portion and contracted toward the base so that it may be conveniently gripped by the fingers. A post 52 is integrally formed centrally of the base, its upper end vbeing slightly below the upper edge of the side wall, and reinforcing and guide walls 53 and 54 extend in opposite directions from opposed sides of the post to the side wall. Diametrically opposed cut outs 55 and 56 for lead rwires are provided. in the upper end of the side wall, and cutouts 51 and 58 are provided in the upper ends of the walls 53 and 54 for extending lead wires from the binding posts to said openings 55 and 5G.
The side wall is provided adjacent the walls 53 and 54 with vertically disposed channels 59 and 6I), extending downwardly from the top edge and terminating in laterally disposed shoulders or ledges 6I and 62 respectively.
Within the base and at opposed sides `of the there are provided slots 53 and B4, disposed at-right angles to the walls 53 and 54.
A|pair of plug devices or units are secured in the housing, and 'each is preferably formed by bending a-strip of suitable metal upon itself,
asat 65, to form a double thickness substantially rigid lplugging portion 66, the two legs being bowed outwardly at the base of the plugging portion, as at 61 and 68, to form a shoulder, and
portions. The contact portion 69 is bent laterally, as at 1l, and is provided with an extended threaded hole 12 to receive a binding post screw 13, and the other contact portion is iiared at its ends, as at 1I)a to provide a plug guiding surface.
The plugging portion 6B is provided near its upper end with a hole 13, and the contact portions 69 and 10 are provided with inwardly pressed bosses 14 14 respectively, which are adapted to snap into the hole 13 of a similar plug unit; when the latter is plugged into the device, as shown in dot-and-dash lines in Fig. 21. The guide Walls 53 and 54, which extend to the closure plate 16 adjacent th'e slots 80 and 8| each provides a guide to insure properly aligned insertion of the plugging portions.
, In assembling the units the plugging portions 66 are projected through the slots 63 and 64 in the base of the housing, the shouldered abutting the base at the inner are engaged in ledges El and the channels 62 in such relat1on as to position A cover plate 16 is seated within the open end of the housing upon the upper end of the post 52 and is providedwith projecting lips 11 and 18 which engage the lead wire openings, the lead wire openings preferably having ledges 19-19 upon which the lips rest. Plug receiving slots 80 and 8| are provided in the plate in line with the slots 63 and 64 of the base, and a center hole 82 is provided between them in which the securing bolt 83 is engaged, this bolt being extended through a passage 84 in the post 52, and having a nut 85 upon its threaded end disposed in a countersunk recess 86 inthe lower end of the post.
I have illustrated and described preferred and satisfactory embodiments of the invention, but it will be obvious that changes may be made therein, within the spirit and scope thereof, as defined in the appended claims.
Having thus described my invention what I claim and desire to secure by Letters Patent is:
1. In an electrical plug device, a housing shell of insulating material, having spaced end walls, one or said end walls having a pair of transversely aligned plug receiving openings and the other ol.' said end walls having a pair of transversely aligned plug positioning slots having their long sides parallel to each other, said housing shell having pockets disposed between said end walls and said plug receiving openings and said be spread at its two sides into parallel relation in surface contact with said inserted plug portion.
2. In an electrical plug device, a housing shell of insulating material,
3. In an electrical plug device, a cup shaped insulating material having a LANCASTER P. CLARK, JR.
US22028D Electrical plug device Expired USRE22028E (en)

Publications (1)

Publication Number Publication Date
USRE22028E true USRE22028E (en) 1942-02-17

Family

ID=2088253

Family Applications (1)

Application Number Title Priority Date Filing Date
US22028D Expired USRE22028E (en) Electrical plug device

Country Status (1)

Country Link
US (1) USRE22028E (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443797A (en) * 1946-07-19 1948-06-22 Tracy La Cost C Electric plug adapter
US2915736A (en) * 1955-11-30 1959-12-01 Bryant Electric Co Wiring device
US3267334A (en) * 1962-03-14 1966-08-16 United Aircraft Corp Modular circuit assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443797A (en) * 1946-07-19 1948-06-22 Tracy La Cost C Electric plug adapter
US2915736A (en) * 1955-11-30 1959-12-01 Bryant Electric Co Wiring device
US3267334A (en) * 1962-03-14 1966-08-16 United Aircraft Corp Modular circuit assembly

Similar Documents

Publication Publication Date Title
US2895119A (en) Plug and face plate
US2579538A (en) Electrical outlet with insulating closures
US4042292A (en) Wall plate structure
US1979958A (en) Electrical plug device
US1950826A (en) Quick detachable electrical connection
US2605374A (en) Electric switch for door jambs
US2032470A (en) Electric plug connecter
USRE22028E (en) Electrical plug device
US2221345A (en) Electrical receptacle or outlet
US1994880A (en) Electric outlet device or socket
US3072873A (en) Electrical plug adaptor
US2192737A (en) Plug cap
US1989693A (en) Self-sealing receptacle
US2532219A (en) Electrical outlet
US2231976A (en) Electrical receptacle
US2577974A (en) Electrical outlet
US2498642A (en) Electrical receptacle
US1631507A (en) Outlet receptacle
US3020366A (en) Safety lamp socket
US1990687A (en) Plug and plug receptacle
US2175472A (en) Receptacle
US2326538A (en) Receptacle for electric wiring systems
US1629568A (en) Combination electrical connecter device and fixture support
US2622119A (en) Clampless bottom wiring for electrical devices
US3467939A (en) Grounding strap improvement for round grounding outlet