US2474454A - Electrical plug - Google Patents

Electrical plug Download PDF

Info

Publication number
US2474454A
US2474454A US725918A US72591847A US2474454A US 2474454 A US2474454 A US 2474454A US 725918 A US725918 A US 725918A US 72591847 A US72591847 A US 72591847A US 2474454 A US2474454 A US 2474454A
Authority
US
United States
Prior art keywords
prongs
plug
switch
recess
prong
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 - Lifetime
Application number
US725918A
Inventor
Ralph L Avery
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US725918A priority Critical patent/US2474454A/en
Application granted granted Critical
Publication of US2474454A publication Critical patent/US2474454A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66Structural association with built-in electrical component
    • H01R13/70Structural association with built-in electrical component with built-in switch

Definitions

  • a further object of the invention is the provision of a locking means whereby the switch cannot be unintentionally disconnected.
  • a still further object of the invention is the provision of a simple mechanism which will facilitate assembly of the device as a whole, and one which will not require any special skill to assemble.
  • Figure 1 is a perspective view of the switch plug of my invention.
  • Figure 2 is an enlarged top plan view of the plug with parts broken away, and other parts in section in order to more clearly disclose the interior construction.
  • Figure 3 is a side elevation of the structure shown in Figure 2, a portion being shown in vertical section to more clearly illustrate the interior mechanism.
  • Figure 4 is an end elevation as viewed from line 4--4 of Figure 3.
  • a plug comprising upper and lower sections 5 and 6, respectively. is secured together by screws 1, to form a substantially cylindrical plug body.
  • the plug body is preferably molded from a resilient form of insulating material.
  • the larger section 6 has, extending along the plane surface which in assembly is contiguous with the'plane surface of the section 5, a pair of parallel grooves 8, adapted to receive the inner 2 end bent to a V shape to fit into the oflset portion l2, of the groove and to provide a lug l6, to which is secured by a rivet H, the extending end ofa spring contact l8, housed in one of the recesses l3.
  • the other prong 9 has attached thereto, by a rivet l9, a, switch contact 2
  • a second spring contact 22, lying within the other recess 3, is provided with a. switch contact 23, positioned within the recess l4.
  • , and 23 are diametrically opsurface of the body section and is also radial to the center of the recess l4.
  • a post 21 Extending upwardly through the center of the recess I4, is a post 21, which is secured in the body portion 6, and continues upwardly into a portions of the prongs 9.
  • the prongs 9, extend from the plug body for insertion into a standard receptacle, the extending portions being shaped ofiset l2, and both are provided, near the female end of the device, with a transversely enlarged elongated recess l3.
  • the other groove 8 Extending upwardly through the center of the recess I4, is a post 21, which is secured in the body portion 6, and continues upwardly into a portions of the prongs 9.
  • the prongs 9, extend from the plug body for insertion into a standard receptacle, the extending portions being shaped ofiset l2, and both are provided, near the female end of the device, with a transversely enlarged elongated recess l3.
  • the other groove 8 Extending upwardly through the center of the recess I4, is
  • 4 One of the prongs 9, has its recess 25, formed in the body section 5, and concentric with the recess l4.
  • Journaled on the post 21, is a, fiber disc 28, which carries a metallic switch arm 29, provided with downwardly directed lugs 3
  • a fiber ratchet disc 33 Journaled on the post 21, and positioned above the switch arm 29, is a fiber ratchet disc 33, having four circumferentially spaced notches 34,
  • a combined compression and torsion spring 42, mounted on post 21, has one end thereof secured in a hole 43, drilled through the top of the post, and the other end thereof resting in a notch formed in the side of the arm 39.
  • is provided with a notch 44, in which is secured one end of a pull chain 46, which passes out of the recess 25, to a position exterior of the plug body, through an opening 41, formed therein.
  • the male end of the plug is provided with a tapered threaded portion adapted to receive an internally threaded ring 41.
  • This end of the plug is also provided with a slot 48, which allows the sections, parted by the slot, to come together slightly upon tightening of the ring 41.
  • This slight compression of the threaded end of the plug causes a corresponding movement of the extending ends of the prongs 9, which, together with the action of the teeth I 0, looks the unit firmly in place in its receptacle.
  • a socket plug comprising a body having a pair of socket engaging prongs extending therefrom, said body having a longitudinal slot therein 4 located between said prongs dividing the prong end of the body into'two parts, said prongs having gripping teeth formed on the inner faces of said prongs, said teeth being directed downwardly and toward the central axis of said body so as to facilitate the insertion of the prongs into a socket and to impede the withdrawal of the same therefrom, and an element on the prong end of the body for drawing the divided parts of the prong end together, thereby adjusting the distance between the prongs.
  • a switch plug comprising a body having a pair of socket engaging prongs extending therefrom, said prongs having gripping teeth formed on the inner faces of said prongs, said teeth being directed downwardly and toward the central axis of said body so as to facilitate the insertion of the prongs into a socket and to impede the withdrawal of the same therefrom and means for adlusting the distance between said prongs, said means comprising a tapered threaded portion on said prong end of the body, an internally threaded ring engaging said portion, said prong end having a longitudinal slot therein spaced between the prongs, said ring being adapted to draw the prongs toward each other when the ring is tightened on the threaded portion.

Description

June 28, 1949. R. L. AVERY 2,474,454
ELECTRICAL PLUG Filed Feb. 1, 1947 INVENTORI BW W ATTORNEY Patented June 1949 UNITED STATES PATENT OFFICE ELECTRICAL PLUG Ralph L. Avery, Oakland, Calif. Application February 1, 1947, Serial'No. 725,918 2 Claims. (01. 113-351) 1 This invention relates to electrical switches and has for its principal object the provision of a plug that otherwise would be directly connected into the receptacle.
A further object of the invention is the provision of a locking means whereby the switch cannot be unintentionally disconnected.
A still further object of the invention is the provision of a simple mechanism which will facilitate assembly of the device as a whole, and one which will not require any special skill to assemble.
The methods of attaining the foregoing will become apparent during the course of the following description and appended claims, taken in connection with the accompanying drawing forming a part hereof.
In the drawing:
Figure 1 is a perspective view of the switch plug of my invention.
Figure 2 is an enlarged top plan view of the plug with parts broken away, and other parts in section in order to more clearly disclose the interior construction.
Figure 3 is a side elevation of the structure shown in Figure 2, a portion being shown in vertical section to more clearly illustrate the interior mechanism.
Figure 4 is an end elevation as viewed from line 4--4 ofFigure 3.
Referring to the drawing in detail, a plug comprising upper and lower sections 5 and 6, respectively. is secured together by screws 1, to form a substantially cylindrical plug body. The plug body is preferably molded from a resilient form of insulating material.
The larger section 6, has, extending along the plane surface which in assembly is contiguous with the'plane surface of the section 5, a pair of parallel grooves 8, adapted to receive the inner 2 end bent to a V shape to fit into the oflset portion l2, of the groove and to provide a lug l6, to which is secured by a rivet H, the extending end ofa spring contact l8, housed in one of the recesses l3.
The other prong 9, has attached thereto, by a rivet l9, a, switch contact 2|, which lies within the recess l4.
A second spring contact 22, lying within the other recess 3, is provided with a. switch contact 23, positioned within the recess l4. The
' switch contacts 2|, and 23, are diametrically opsurface of the body section and is also radial to the center of the recess l4.
Extending upwardly through the center of the recess I4, is a post 21, which is secured in the body portion 6, and continues upwardly into a portions of the prongs 9. The prongs 9, extend from the plug body for insertion into a standard receptacle, the extending portions being shaped ofiset l2, and both are provided, near the female end of the device, with a transversely enlarged elongated recess l3. The other groove 8,
' is provided, intermediate'its ends, with a cylindrical recess |4. One of the prongs 9, has its recess 25, formed in the body section 5, and concentric with the recess l4. Journaled on the post 21, is a, fiber disc 28, which carries a metallic switch arm 29, provided with downwardly directed lugs 3|, each having at its lower end a contact shoe 32, which is angularly inclined and complementary with the switch contacts 2|, and the steps 24.
It will be seen that when the disc 29, is ro-. tated, the contact shoes 32, will rise along the steps 24, upon which they may be resting, until they pass beyond the walls 26, whereupon they will fall on to the surfaces of the next succeeding steps. Thus the shoes 32, while resting on the contacts 2|, and 23, will provide a current path between the prong 9, and the spring contact 22, and when moved to occupy the steps between the contacts 2|, and 23, will break the circuit so that no current may flow between the prong 9, and the spring contact 22, The switch will then be in the oil" position.
Journaled on the post 21, and positioned above the switch arm 29, is a fiber ratchet disc 33, having four circumferentially spaced notches 34,
- therein. An opposed pair of the notches are adapted to engage lugs 36, rising from the switch arm 29, so as to'secure the latter and the ratchet disc for rotary motion together. A sheet metal rotary pawl 31, journaled on the post 21, and mounted above the ratchet disc 33, is provided with a pair of downwardly bent individual pawls 33, adapted to coact with the notches 34, of the disc 33. A pair of lever arms 39, and 4|, rise upwardly from the member 31.
A combined compression and torsion spring 42, mounted on post 21, has one end thereof secured in a hole 43, drilled through the top of the post, and the other end thereof resting in a notch formed in the side of the arm 39. The other arm 4|, is provided with a notch 44, in which is secured one end of a pull chain 46, which passes out of the recess 25, to a position exterior of the plug body, through an opening 41, formed therein.
It will be seen that when the chain 46 is pulled, the rotary pawl 31, will be revolved, carrying with it the disc 33, and the switch arm 29, thus causing the contact shoes 32, to pass into engagement with succeeding steps 24. Release of the pull chain will allow the torsion spring 42, to return the rotary pawl to its normal position. During this retractive movement, the pawls 38, will rise out of the notches 34, in which they are engaged, and move into engagement with the next succeeding notches. The switch mechanism is revolved a quarter of a revolution with each pull of the chain.
The male end of the plug is provided with a tapered threaded portion adapted to receive an internally threaded ring 41. This end of the plug is also provided with a slot 48, which allows the sections, parted by the slot, to come together slightly upon tightening of the ring 41. This slight compression of the threaded end of the plug causes a corresponding movement of the extending ends of the prongs 9, which, together with the action of the teeth I 0, looks the unit firmly in place in its receptacle.
From the foregoing it will be apparent that I have devised a general utility switch which may be inserted in circuit with appliances such as wafile irons, soldering irons, heaters or the like which are not usually equipped with switches. I have also provided a device that cannot be inadvertently.disconnected, and one, which'due to its simple construction, contributes to rapid assembly and consequent economical production.
I claim:
.1. A socket plug comprising a body having a pair of socket engaging prongs extending therefrom, said body having a longitudinal slot therein 4 located between said prongs dividing the prong end of the body into'two parts, said prongs having gripping teeth formed on the inner faces of said prongs, said teeth being directed downwardly and toward the central axis of said body so as to facilitate the insertion of the prongs into a socket and to impede the withdrawal of the same therefrom, and an element on the prong end of the body for drawing the divided parts of the prong end together, thereby adjusting the distance between the prongs.
2. A switch plug comprising a body having a pair of socket engaging prongs extending therefrom, said prongs having gripping teeth formed on the inner faces of said prongs, said teeth being directed downwardly and toward the central axis of said body so as to facilitate the insertion of the prongs into a socket and to impede the withdrawal of the same therefrom and means for adlusting the distance between said prongs, said means comprising a tapered threaded portion on said prong end of the body, an internally threaded ring engaging said portion, said prong end having a longitudinal slot therein spaced between the prongs, said ring being adapted to draw the prongs toward each other when the ring is tightened on the threaded portion.
RALPH L. AVERY.
REFERENCES ('JITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,652,398 Everett Dec. 13, 1927 1,652,927 Buchanan Dec. 13, 1927 1,941,374 Weisberg Dec. 26, 1933 1,957,778 Hopkins, Jr Ma 8, 1934 1,961,484 Grant June ,5, 1934 2,049,093 Thorin July 28, 1936 2,058,321 Kellner Oct. 20, 1936 2,075,674 Te Pas Mar. 30, 1937 2,126,494 Means Aug. 9, 1938 2,148,875 Perkins Feb. 28, 1939 2,217,138 Simpson Oct. 8, 1940 2,259,359 Thompson Oct. 14, 1941 2,380,588 Frank July 31, 1945
US725918A 1947-02-01 1947-02-01 Electrical plug Expired - Lifetime US2474454A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US725918A US2474454A (en) 1947-02-01 1947-02-01 Electrical plug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US725918A US2474454A (en) 1947-02-01 1947-02-01 Electrical plug

Publications (1)

Publication Number Publication Date
US2474454A true US2474454A (en) 1949-06-28

Family

ID=24916466

Family Applications (1)

Application Number Title Priority Date Filing Date
US725918A Expired - Lifetime US2474454A (en) 1947-02-01 1947-02-01 Electrical plug

Country Status (1)

Country Link
US (1) US2474454A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2536741A (en) * 1949-10-15 1951-01-02 Automatic Controls Corp Defrosting timer
US2611065A (en) * 1950-02-14 1952-09-16 Robert W Adams Switch device for christmas tree lights
US2784268A (en) * 1955-12-02 1957-03-05 Donald R Jackson Combination switch and wall plug
US2882374A (en) * 1956-08-23 1959-04-14 Parks Cramer Co Switch for continuous outlet
US3041572A (en) * 1959-07-31 1962-06-26 Solinsky Joseph Electrical connectors
US3324260A (en) * 1965-10-01 1967-06-06 Gen Electric Switched outlet adapter
US4463228A (en) * 1983-01-07 1984-07-31 Mcgill Manufacturing Company, Inc. Portable electrical switch and outlet unit
US5108301A (en) * 1990-02-16 1992-04-28 Torok Dale W Locking electrical cord connector
US5197897A (en) * 1990-02-16 1993-03-30 Torok Dale W Locking cord connector and method of locking an electrical plug and receptacle together
US20120276771A1 (en) * 2011-04-29 2012-11-01 Doubt Ruxton C Electrical socket adaptor

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1652927A (en) * 1927-12-13 Crystal detector and cmp
US1652398A (en) * 1925-10-26 1927-12-13 Edward A Everett Lamp socket
US1941374A (en) * 1929-09-09 1933-12-26 Sidney M Weisberg Attachment plug
US1957778A (en) * 1932-07-25 1934-05-08 Jr Albert F Hopkins Separable plug
US1961484A (en) * 1932-04-30 1934-06-05 Albert E Grant Electric plug construction
US2049093A (en) * 1934-06-18 1936-07-28 Thorin Harry Electrical outlet plug
US2058321A (en) * 1933-12-05 1936-10-20 Kellner Louis Electrical cord connecter
US2075674A (en) * 1933-08-08 1937-03-30 Walter A Frantz Terminal plug for electric cords
US2126494A (en) * 1937-04-16 1938-08-09 Adolph Gerlich Electric plug
US2148875A (en) * 1936-10-30 1939-02-28 Singer Mfg Co Electric lamp socket and plug connector
US2217138A (en) * 1939-03-18 1940-10-08 Stanley T Simpson Electric plug
US2259359A (en) * 1939-03-06 1941-10-14 Milton E Thompson Power saver
US2380588A (en) * 1943-08-14 1945-07-31 Frank Louis Electric switch plug and socket indicator

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1652927A (en) * 1927-12-13 Crystal detector and cmp
US1652398A (en) * 1925-10-26 1927-12-13 Edward A Everett Lamp socket
US1941374A (en) * 1929-09-09 1933-12-26 Sidney M Weisberg Attachment plug
US1961484A (en) * 1932-04-30 1934-06-05 Albert E Grant Electric plug construction
US1957778A (en) * 1932-07-25 1934-05-08 Jr Albert F Hopkins Separable plug
US2075674A (en) * 1933-08-08 1937-03-30 Walter A Frantz Terminal plug for electric cords
US2058321A (en) * 1933-12-05 1936-10-20 Kellner Louis Electrical cord connecter
US2049093A (en) * 1934-06-18 1936-07-28 Thorin Harry Electrical outlet plug
US2148875A (en) * 1936-10-30 1939-02-28 Singer Mfg Co Electric lamp socket and plug connector
US2126494A (en) * 1937-04-16 1938-08-09 Adolph Gerlich Electric plug
US2259359A (en) * 1939-03-06 1941-10-14 Milton E Thompson Power saver
US2217138A (en) * 1939-03-18 1940-10-08 Stanley T Simpson Electric plug
US2380588A (en) * 1943-08-14 1945-07-31 Frank Louis Electric switch plug and socket indicator

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2536741A (en) * 1949-10-15 1951-01-02 Automatic Controls Corp Defrosting timer
US2611065A (en) * 1950-02-14 1952-09-16 Robert W Adams Switch device for christmas tree lights
US2784268A (en) * 1955-12-02 1957-03-05 Donald R Jackson Combination switch and wall plug
US2882374A (en) * 1956-08-23 1959-04-14 Parks Cramer Co Switch for continuous outlet
US3041572A (en) * 1959-07-31 1962-06-26 Solinsky Joseph Electrical connectors
US3324260A (en) * 1965-10-01 1967-06-06 Gen Electric Switched outlet adapter
US4463228A (en) * 1983-01-07 1984-07-31 Mcgill Manufacturing Company, Inc. Portable electrical switch and outlet unit
US5108301A (en) * 1990-02-16 1992-04-28 Torok Dale W Locking electrical cord connector
US5197897A (en) * 1990-02-16 1993-03-30 Torok Dale W Locking cord connector and method of locking an electrical plug and receptacle together
US20120276771A1 (en) * 2011-04-29 2012-11-01 Doubt Ruxton C Electrical socket adaptor
US8777646B2 (en) * 2011-04-29 2014-07-15 Ruxton C. Doubt Electrical socket adaptor

Similar Documents

Publication Publication Date Title
US2474454A (en) Electrical plug
US2261615A (en) Electrical connector
US2500987A (en) Multiple outlet electrical connector plug
US2154160A (en) Attachment for electrical apparatus
US3060293A (en) Automotive electric socket
US2439385A (en) Electric socket
US2564159A (en) Electric plug connector
US2461126A (en) Resettable circuit breaker
US2534875A (en) Trouble light construction
US2332554A (en) Electric switch
US3020366A (en) Safety lamp socket
US2726293A (en) Electrical socket and switch
US1985808A (en) Gear shift lever horn button system
US1632599A (en) Snap plug
US1700495A (en) Locking snap plug
EP0077046B1 (en) Lightbulb socket
US1482603A (en) Eliectric-iiamp socket
US1760138A (en) Combination electric plug and switch
US1536522A (en) Extension plug for electric sockets
US2714711A (en) Electrical connectors
US2108708A (en) Electrical connecter
US2042580A (en) Cord terminal plug
US1510247A (en) Electric-socket plug
US1404344A (en) Electric socket
US1956020A (en) Electric contact plug