US1728549A - Combined switch and plug cap - Google Patents

Combined switch and plug cap Download PDF

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US1728549A
US1728549A US110604A US11060426A US1728549A US 1728549 A US1728549 A US 1728549A US 110604 A US110604 A US 110604A US 11060426 A US11060426 A US 11060426A US 1728549 A US1728549 A US 1728549A
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switch
base
cap
contact
contacts
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US110604A
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Huppert William
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch

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  • This invention relates to a cap for an electrical plug combined with a switch therefor.
  • the cap for a plug, receptacle or like electrical device is provided ,with a switch, preferably of the rotary type, and arranged as a unit therewith, thereby affording in a single unit an electrical cap combined with a switch for opening and closing the circuit through the terminals of the cap.
  • FIG. 1 is acentral sectional elevation of a preferred form of my invention, the section on which Fig. 1 is taken being indicated as 1-1 on Fig. 2;
  • Fig. 2 is a rear elevation of Fig. 1
  • Fig. 3 is a sectional elevation on line 33 of Fig. 1;
  • Fig. 4 is a sectional elevation on line 44 of fieferring to the drawings, the combined cap switch comprises the base member 10, the cap member 11 and the bushing member 12, each of which is of bakelite or other suitable electrically insulated material.
  • the base member 10 is of any suitable contour and arrangement in conformity to any regulation or other approved socket, receptacle or the like to provide for the engagement of the uprights 13,14 or equivalent carried by the base member 10 with the terminals of the socket, rece tacle or the like.
  • the upright 13 isintegral with the base strip 15, located in position within the hollowed portion 16 of the base member 10 by means of the insert member 17, suitably secured within the circular depression 18 in the base member 10, as by knurling the exterior face of the insert member 17.
  • the base strip 15 is also secured in position by means of thescrew 19, tapped into a suitably threaded 'recess in the basevmember 10.
  • the upright 13 and its strip 15 are preferabl formed of an integral stamping of brass or ike suitable electrically conducting material of the desired shape and formation.
  • the upright 14 is similarly secured to its base strlp 20 and is located in position within the hollowed portion 16 of the base member 10 by means of its insert member 21, similar to the insert member 17.
  • the insert member 21 is received within the circular depression 22 1n the base member 10.
  • the base strip 20 is also secured in position by means of the screw 23, which serves also as a terminal of the cap switch.
  • the upright 14 and its base strip 20 are preferably formed of an integral stamping of brass or like suitable electrically conducting material of the desired shape and formation.
  • the extension strip 24 of, brass or other suitable electrically conducting material which is located in posit-ion at its one end by means of the eyelet 25, of brass or the like, extending through the perforation 27 in the base member 10, the opposite ends 28, 29, of which is swaged to engage with and make good electrical contact with the base plate 30 of the i iring contact 31, of phosphorbronze or the
  • the movable member of the switch proper is in the form of an electrically bridging or connector plate 32 comprising the oppositely disposed peripheral portions 33, 34 disposed in the plane of the body of the switch connector 32 and the flange portions 33, 34 extendin substantially at right angles to the perip eral portions 33, 34, respectively, servin as the contact terminals of the connector p ate 32.
  • the central portion of the switch connector plate 32 is provided with a central opening 35 to permit the entry therethrough of the cord 36 formed of suitable insulating fabric
  • Such switch connector plate 32 is mounted on and supported by the connector'body 39, of bakelite or other suitable insulating material.
  • the connector body 39 is preferably integral with the bushing member 12.
  • the other spring contact 40 of. phosphorbronze is disposed in juxtaposition to the v and 39 are preferably s aforesaid springcontaet 31 relative to the contact flanges 33, 34 of the switch connector plate 32.
  • the base plate 41 of the spring contact 40 is secured in position relatively to the base member 10 by means of the eyelet 42 of brass or the like. received within the perforation 43 in the base member 10, the opposite ends of the eyelet 42 being swa ed tohold the eyelet 42 and therewith the ase 41 in proper position relative to the base member 10.
  • the eyelet 42 serves also as a terminal, for which purpose it is provided with an internal threadin 44 meshing with the threadin of the terminal screw 45.
  • the conductor body 39 of the switch is provided with the radially extending toothed portions 39, 39",-39, 39, coacting with the spring contacts 31, 40 to hold the switch connector plate 32 and the switch parts per se in stable position for the circuit-closing and circuit-o ening positions of the switch.
  • the engaging faces of the spring contacts ,31, 40 are concavely sha ed and the contact flanges 33, 34 of the switch connector plate 32 are correspondingly convexedly shaped.
  • the switch connector plate 32 is retained in position on the connector body .39 by the provision of the lugs 46 extending forwardly.
  • the bushing 12 1s positioned within the cap member 11 and the cap member 11 is then secured to the base member 10 by any suitable means, as by the provision of the spaced screws 48, see Figs. 2 and 3, tapped within suitable inserts 49 disposed in the cap member 11 and provided with internal threading.
  • the cord 36 is threaded through the centr o ening 50 of the bushing member 12, thence t rough the central opening 51 of the base member 10, and the bared-wires of the respective conductors 37, 38 of the cord 36 are connected to the respective terminals 45, 23,
  • the combined ca and switch is now prepared for insertion 0 its uprights 13,14, or equivalent terminal parts, into ongagement with the terminals of a socket, receptacle or the like, leading to the supply circult.
  • the swltch is in its open-circuiting position.
  • the bushing member 12 is manually grasped at its external portion 12, for which purpose it is milled, knurled or the like, and upon clockwise rotation, the connector body 39 and the switch connector plate 32 are rotated in the direction of the arrow 51, see Fig. 3, relatively to the spring contacts 31, 40, whereupon the contact flanges 34, 33 are brought respectively into enga ement with the spring contacts 31,40, therriiy closing the circuit.
  • the parts of the closed circuit may be traced as follows: on the one side of the circuit, the conduct0r37, terminal screw 45, terminal eyelet 42, base plate 4 4, spring contact 40, contact flange 33, connector plate 32, contact flange 34, spring contact 31, base plate 30, eyelet 26, connector plate 24, screw 19, base plate 15, upright ter minal 13, to one terminal of the supply circuit.
  • the opposite side of the circuit comprises the following parts: conductor 38, terminal 23, base plate 20, upright terminal 44, and thence to the other terminal of the supply circuit.
  • my invention provides for a combined electrical switch and a cap in a unitary construction and meeting all the electrical and safety requirements of the Underwriters Association relating to fire hazards.
  • the parts thereof are arranged to provide for ruggedness of construction and for reduced over-all dimensions.
  • My invention is; highly advantageous in the low costs of the required material and of the labor of the assembly of the parts.
  • I claim: 1. The combination of a base having push contacts, a cap thereon centrally chambered, a rotary switch member having an inward portion r'evolubly mounted in the cap chamberand an outward knob portion, said switch member being axially-apertured to receive a two-wire cable about which it rotates, stationary contacts in the cap, rotary snap-contact means actuated by the knob, a terminal connected to one of the stationary contacts for direct connection of one of the cable wires, and another terminal connected to one of the push contacts for connection to the other cable wire, the other ush contact being electrically connected to t e other stationary contact, the terminals being accessible at the end of the base remote from the switch knob and adjacent the push contacts for connection of the separate wires of the cable inserted through the switch member and the base.
  • a rotary switch member having an inward portion revolubly mounted in the cap chamber and an outward knob portion, said switch member being axially apertured to receive a two-wire cable about which it rotates, stationary contacts in the cap, rotary snap-contact means actuated by the knob, a contact strip mounted on an inward face of the base, said one of the push contacts and strip carryin fling post for direct connection having a bin of one of the cable-wires, another contact strip similarly mounted and carrying the other of said push contacts and also electrically connected to one of said stationary contacts, and a terminal connected to the other stationary contact and adapted for direct connection to the other cable wire, the terminals being accessible at the end of the base remote from the switch knob and adjacent the push contacts for connection of the separate wires of the cable inserted through the switch member and the base.
  • a combined push plug and switch adapted for cooperation with a plug socket or analogous electric fitting and comprising a base of insulatin material of substantially disc form and havmg an open chambered face, prong contacts secured to the base and projecting from said open face, terminals secured to said base and accessible from the open end of the chamber for connection of of insulating material fixedly secured to the base at the end opposite the prongs and open face of the chamber, the cap being also chambered and having a flange at its end opposite said base, a switch bod of insulating material centrally aperture co-axially with said base and cap, having a contact-supporting portion within the cap chamber and also a flange therein co-operating with the cap flange to secure the switch body rotatably in position, the switch body also including a'knob portion projecting beyond the cap at the end opposite the contact prongs, and stationary switch contacts within the cap chamber in circuit with said terminals, the cable being insertable axially through the switch body and base for connection of its separate
  • a combined push plug and switch adapted for cooperation with a plug socket or analogous electric fitting and comprising ,a base of insulating material of substantially disc form and having an open chambered face, prong contacts secured to the base and projecting from said open face, terminals secured to said base and accessible.

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  • Switch Cases, Indication, And Locking (AREA)

Description

Sept. 17, 1929. w p -r COMBINED SWITCH AND PLUG CAP Filed May. 21, 1926 Patented Sept. 17, 1929 PATENT OFFICE WILLIAM HUPPEBT, OF NEW YORK, N. Y.
COMBINED SWITCH AND PLUG CA? Application filed Kay 21,
This invention relates to a cap for an electrical plug combined with a switch therefor.
Pursuant to the preferred forms of my invent-ion, the cap for a plug, receptacle or like electrical device is provided ,with a switch, preferably of the rotary type, and arranged as a unit therewith, thereby affording in a single unit an electrical cap combined with a switch for opening and closing the circuit through the terminals of the cap.
Further features and objects of the invention will be more fully understood from the following detail description and the accom-, panying drawings, in which Fig. 1 is acentral sectional elevation of a preferred form of my invention, the section on which Fig. 1 is taken being indicated as 1-1 on Fig. 2;
Fig. 2 is a rear elevation of Fig. 1
Fig. 3 is a sectional elevation on line 33 of Fig. 1; and
Fig. 4 is a sectional elevation on line 44 of fieferring to the drawings, the combined cap switch comprises the base member 10, the cap member 11 and the bushing member 12, each of which is of bakelite or other suitable electrically insulated material. The base member 10 is of any suitable contour and arrangement in conformity to any regulation or other approved socket, receptacle or the like to provide for the engagement of the uprights 13,14 or equivalent carried by the base member 10 with the terminals of the socket, rece tacle or the like.
pecifically, the upright 13 isintegral with the base strip 15, located in position within the hollowed portion 16 of the base member 10 by means of the insert member 17, suitably secured within the circular depression 18 in the base member 10, as by knurling the exterior face of the insert member 17. The base strip 15 is also secured in position by means of thescrew 19, tapped into a suitably threaded 'recess in the basevmember 10. The upright 13 and its strip 15 are preferabl formed of an integral stamping of brass or ike suitable electrically conducting material of the desired shape and formation.
1926. Serial No. 110,804.
The upright 14 is similarly secured to its base strlp 20 and is located in position within the hollowed portion 16 of the base member 10 by means of its insert member 21, similar to the insert member 17. The insert member 21 is received within the circular depression 22 1n the base member 10. The base strip 20 is also secured in position by means of the screw 23, which serves also as a terminal of the cap switch. The upright 14 and its base strip 20 are preferably formed of an integral stamping of brass or like suitable electrically conducting material of the desired shape and formation.
In co-operation with the switch parts, described more fully hereinafter, I provide the extension strip 24 of, brass or other suitable electrically conducting material, which is located in posit-ion at its one end by means of the eyelet 25, of brass or the like, extending through the perforation 27 in the base member 10, the opposite ends 28, 29, of which is swaged to engage with and make good electrical contact with the base plate 30 of the i iring contact 31, of phosphorbronze or the In the specific form of my invention illustrated in the drawings, the movable member of the switch proper is in the form of an electrically bridging or connector plate 32 comprising the oppositely disposed peripheral portions 33, 34 disposed in the plane of the body of the switch connector 32 and the flange portions 33, 34 extendin substantially at right angles to the perip eral portions 33, 34, respectively, servin as the contact terminals of the connector p ate 32. The central portion of the switch connector plate 32 is provided with a central opening 35 to permit the entry therethrough of the cord 36 formed of suitable insulating fabric and enclosing the circuit conductors 37 38, see Fig. 1.
Such switch connector plate 32 is mounted on and supported by the connector'body 39, of bakelite or other suitable insulating material. The connector body 39 is preferably integral with the bushing member 12.
The other spring contact 40 of. phosphorbronze is disposed in juxtaposition to the v and 39 are preferably s aforesaid springcontaet 31 relative to the contact flanges 33, 34 of the switch connector plate 32. The base plate 41 of the spring contact 40 is secured in position relatively to the base member 10 by means of the eyelet 42 of brass or the like. received within the perforation 43 in the base member 10, the opposite ends of the eyelet 42 being swa ed tohold the eyelet 42 and therewith the ase 41 in proper position relative to the base member 10. The eyelet 42 serves also as a terminal, for which purpose it is provided with an internal threadin 44 meshing with the threadin of the terminal screw 45.
e conductor, say, the conductor 37, is connected tothe terminal screw 45 and the other conductor 38 is connected to the other terminal 23.
The conductor body 39 of the switch is provided with the radially extending toothed portions 39, 39",-39, 39, coacting with the spring contacts 31, 40 to hold the switch connector plate 32 and the switch parts per se in stable position for the circuit-closing and circuit-o ening positions of the switch. Such toot ' ed ortions 39, 39", 39
haped to provide for a wiping contact engagement of the spring contacts 31, 40 with the contact flanges 33, 34, and abrupt separation between these parts at the instant of breaking of the circuit, and also for substantially instantaneous closure of the' circuit, for the respective positions of'rotative movement of the movable body portion of the switch. To attain such object effectually, the engaging faces of the spring contacts ,31, 40 are concavely sha ed and the contact flanges 33, 34 of the switch connector plate 32 are correspondingly convexedly shaped.
The switch connector plate 32 is retained in position on the connector body .39 by the provision of the lugs 46 extending forwardly.
' of the forward face of the connector bod 39 and received within the perforations 4 in the switch connector plate 32, reinforced by the snug fit of the contact flanges 33', 34, about the lateral toothed faces of the connector body 39.
In the assembly of my combined cap and switch, the bushing 12 1s positioned within the cap member 11 and the cap member 11 is then secured to the base member 10 by any suitable means, as by the provision of the spaced screws 48, see Figs. 2 and 3, tapped within suitable inserts 49 disposed in the cap member 11 and provided with internal threading.
In the use of my combined switch and capi the cord 36 is threaded through the centr o ening 50 of the bushing member 12, thence t rough the central opening 51 of the base member 10, and the bared-wires of the respective conductors 37, 38 of the cord 36 are connected to the respective terminals 45, 23,
as aforesaid. The combined ca and switch is now prepared for insertion 0 its uprights 13,14, or equivalent terminal parts, into ongagement with the terminals of a socket, receptacle or the like, leading to the supply circult.
Assuming the spring contacts 31, 40, to be m the positions shown in Fig. 3, namely in engagement with the lateral faces of the connector body 39 of insulating material, the swltch is in its open-circuiting position. To close the circuit, the bushing member 12 is manually grasped at its external portion 12, for which purpose it is milled, knurled or the like, and upon clockwise rotation, the connector body 39 and the switch connector plate 32 are rotated in the direction of the arrow 51, see Fig. 3, relatively to the spring contacts 31, 40, whereupon the contact flanges 34, 33 are brought respectively into enga ement with the spring contacts 31,40, therriiy closing the circuit. The parts of the closed circuit may be traced as follows: on the one side of the circuit, the conduct0r37, terminal screw 45, terminal eyelet 42, base plate 4 4, spring contact 40, contact flange 33, connector plate 32, contact flange 34, spring contact 31, base plate 30, eyelet 26, connector plate 24, screw 19, base plate 15, upright ter minal 13, to one terminal of the supply circuit. The opposite side of the circuit comprises the following parts: conductor 38, terminal 23, base plate 20, upright terminal 44, and thence to the other terminal of the supply circuit.
From the above, it will appear that my invention provides for a combined electrical switch and a cap in a unitary construction and meeting all the electrical and safety requirements of the Underwriters Association relating to fire hazards. The parts thereof are arranged to provide for ruggedness of construction and for reduced over-all dimensions.
My invention is; highly advantageous in the low costs of the required material and of the labor of the assembly of the parts.
Whereas, I have described my invention by reference to specific forms thereof, it will be understood that many changes and modifications may be made without departing from the spirit of the invention.
I claim: 1. The combination of a base having push contacts, a cap thereon centrally chambered, a rotary switch member having an inward portion r'evolubly mounted in the cap chamberand an outward knob portion, said switch member being axially-apertured to receive a two-wire cable about which it rotates, stationary contacts in the cap, rotary snap-contact means actuated by the knob, a terminal connected to one of the stationary contacts for direct connection of one of the cable wires, and another terminal connected to one of the push contacts for connection to the other cable wire, the other ush contact being electrically connected to t e other stationary contact, the terminals being accessible at the end of the base remote from the switch knob and adjacent the push contacts for connection of the separate wires of the cable inserted through the switch member and the base.
2. The combination of a base having push contacts, a cap thereon centrally chambered and having at its outward end an internal flange, a rotary switch member having an inward portion revolublymounted in the cap chamber and an outward knob portion and also having a peripheral flange cooperating with the cap flange to prevent outward displacement of the switch member, said switch member being axially apertured to receive a two-wire cable about which it rotates, stationary contacts in the cap, rotary snap-contact means actuatedby the knob, a terminal connected to one of the stationary contacts for direct connection of one of the cable wires, and another terminal connected to one of the push contacts for connection to the other cable wire, the other push contact being electrically connected to the other stations ry contact, the terminals being accessible at the end of the base remote from the switch knob and adjacent the push contacts for connection of the separate wires of the cable inserted through the switch member and the base.
3. The combination of a base having push contacts, a cap thereon centrally chambered,
a rotary switch member having an inward portion revolubly mounted in the cap chamber and an outward knob portion, said switch member being axially apertured to receive a two-wire cable about which it rotates, stationary contacts in the cap, rotary snap-contact means actuated by the knob, a contact strip mounted on an inward face of the base, said one of the push contacts and strip carryin fling post for direct connection having a bin of one of the cable-wires, another contact strip similarly mounted and carrying the other of said push contacts and also electrically connected to one of said stationary contacts, and a terminal connected to the other stationary contact and adapted for direct connection to the other cable wire, the terminals being accessible at the end of the base remote from the switch knob and adjacent the push contacts for connection of the separate wires of the cable inserted through the switch member and the base.
4. A combined push plug and switch adapted for cooperation with a plug socket or analogous electric fitting and comprising a base of insulatin material of substantially disc form and havmg an open chambered face, prong contacts secured to the base and projecting from said open face, terminals secured to said base and accessible from the open end of the chamber for connection of of insulating material fixedly secured to the base at the end opposite the prongs and open face of the chamber, the cap being also chambered and having a flange at its end opposite said base, a switch bod of insulating material centrally aperture co-axially with said base and cap, having a contact-supporting portion within the cap chamber and also a flange therein co-operating with the cap flange to secure the switch body rotatably in position, the switch body also including a'knob portion projecting beyond the cap at the end opposite the contact prongs, and stationary switch contacts within the cap chamber in circuit with said terminals, the cable being insertable axially through the switch body and base for connection of its separate wires to said terminals.
5. A combined push plug and switch adapted for cooperation with a plug socket or analogous electric fitting and comprising ,a base of insulating material of substantially disc form and having an open chambered face, prong contacts secured to the base and projecting from said open face, terminals secured to said base and accessible. from the open endof the chamber for connection of the separate wires of a two-wire cable, a ca .of insulating material fixedly secured to the ase at the end opposite the prongs and open face of the chamber the cap eing also chambered and having a flange at its end opposite said base, a switch body of insulating material centrally apertured co-axially with said base and cap, having a contact-sup orting portion within thecap chamber an also a flange therein co-operating with the cap flange to secure the switch body rotatably in position, the switch body also including a knob portion projecting beyond the cap at the end opposite the contact prongs, stationary switch contacts within the cap chamber in circuit with said terminals, the cable being insertable axially throu h the switch body and base for connection 0 its separate wires to said terminals, one of said terminals being directly connected to one of the pron contacts, the other terminal being insulated rom the other prong contact, a connection from the last named prong contact to one of the stationary contacts in the cap chamber, and a connection from the last named terminal to the other stationary contact in the cap chamber. In testimony whereof I have signed this
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2448339A (en) * 1944-01-07 1948-08-31 Alexander M Williams Electrical plug
US2470643A (en) * 1945-08-10 1949-05-17 Herman P Rath Light switch
US2480787A (en) * 1948-01-09 1949-08-30 Stephan Frank Combination electric plug and switch
US2790040A (en) * 1954-04-06 1957-04-23 James R Miller Dual sound-control switch
US3376721A (en) * 1966-01-05 1968-04-09 Levine Seymour Electromechanical combination lock
US5426552A (en) * 1991-07-08 1995-06-20 Aditan, Inc. Electrical supply safety socket
US5485340A (en) * 1991-07-08 1996-01-16 Aditan, Inc. Electrical supply safety plug

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2448339A (en) * 1944-01-07 1948-08-31 Alexander M Williams Electrical plug
US2470643A (en) * 1945-08-10 1949-05-17 Herman P Rath Light switch
US2480787A (en) * 1948-01-09 1949-08-30 Stephan Frank Combination electric plug and switch
US2790040A (en) * 1954-04-06 1957-04-23 James R Miller Dual sound-control switch
US3376721A (en) * 1966-01-05 1968-04-09 Levine Seymour Electromechanical combination lock
US5426552A (en) * 1991-07-08 1995-06-20 Aditan, Inc. Electrical supply safety socket
US5485340A (en) * 1991-07-08 1996-01-16 Aditan, Inc. Electrical supply safety plug

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