US 1665095 A
Description (OCR text may contain errors)
April 3, 1928.
J. B. HENRY ELECTRICAL PLUG LOCK Filed Jan. 5. 192'? Patented Apr. 3, 1928.
JESSE B. HENBY, GONNEBSVILLE, INDIANA.
ELECTRICAL PLUG LOCK.
Application lledlanuary .5, 1927. Serial Io. 159,182.
My said invention relates to a lock or fastener forpreventing the accidental disconnection of the separable sections of a detachable connecting plug ada ted to be I inserted in an electric light so'c et or the like for completing an electrical connection. It is an object of the invention to provide a lock or fastener of simple and inexpensive construction which may be attached to one 1. of the sections of a connecting plug and which may be moved into engagement with the other section for preventing accidental separation when stress is applied to the conductors or wires connected to one of the II sections.
Referring to the accompanying drawings which are made a part. hereof and on which similar reference characters indicate similar parts,
Figure 1 is a perspective view illustrating one form of my invention,
Figure 2, a side elevation, and Figure 3, a section on line 3-3 of Figure 2 showing the parts in their two positions.
In the drawings reference character 10 indicates an electrical screw plug adapted to be inserted in an electric llght socketand having a detachable head 11 of the usual construction from -.which extend electrical 80 conductors 12. As is well-known, a plug of this type is used wherever an extension is desired in the use of various electrical appliances, such as electric irons, vacuum cleaners and the like and considerable annoyance is ll occasioned by the head 11 pulling away from the plug 10 thus breaking the electrical connectlon.
In order to prevent the accidental separation of the separable sectionsof the. lug I provide a ringmember 13 having dlametrically opposed perforated-fears 14, such ring being of a size to permit its being readily threaded over the small endof the plug 10,
but being sufiiciently small to revent its passing over such end without belng rotated,
or over the opposite end of such plug. The
arms 14 are bent at substantially right angles to the body of the ring and pivotally support arms 15 of a disk 16,- such arms being also diametrically opposd'and bent at substantially right-angles to the body of the disk permitting the disk to be swung from a position in axial alin'ement with the opening in the ring to a position substantially 90 degrees removed therefrom and at right angles to the'openingji-n the ring, or pen-- to a position substantially at right angles in combination with the mitting the disk to be swung from a posi tion in parallelism with the body of the ring through an arc of substantially 90 degrees to such ring.
The disk 16 is provided with a slot at one side midway between the arms 15, said slot being of a width suflicient to permit the conductors or wires 12 to pass thereinto and 06 extending from the edge of the disk to a polnt sufficient to permitthe wires to pass" to a point'centrally of the disk. With this structure the ring 13 maybe threaded over Y the plu '10 and when the head of the plug 1s attac ed thereto the disk 16 may be swung over behind the head or on the opposite side of the head fromthe plug 10 whereupon stress applied to the wires 12 will cause the head 11 to engage the disk 16 and be held against being detached from the plug 10. If it is desired to break the connection the disk- 16 may be swung to oneside out of the way of the head 11, as shown in dotted lines in Figure 3, to permit the-head to be withdrawn from the plug.
It will be obvious that my device consists of only two very simple parts and may be produced at a very small cost and sold either plug or separately therefrom but the same fills a long felt want in this particular art and various modifications may be made. without departing from the spirit of my invention and therefore I do not limit myself to what is shown in the drawings and described in the s ecification but only as indicated in the appen ed claims:
Having thus fully described m said invention, what I' claim as new an secure by Letters Patent, is:
1. The combination with an electrical desire to connection formed of separable sections of a ring member arranged to be mounted on' one of said sections, and a disk member pivoted on the. first member and swingable into and out of position to prevent accidental detachment of the other section, substantially as set forth.
2. The combination with an electrical connection comprising a pair of separable sections, of a ring capable of being slipped over the smaller end of one of said sections, and a member pivoted to said ring and swingable across the other section for permitting accidental separation of said sections, substantially as set forth.
3. The combination with an electrical connection comprising separable sections one of WhlCh 1s provlded with meansv for engagement with an electrical socket and having an enlar cl portion adjacent thereto,
of an element ormed to slip, over the portion of the section which engages said socket but being held on said connection when the same is connected to the socket, and a member pivoted to said element and swingable over the other section for preventing their endwise accidental separation, substantially as set forth.
4. A device for preventing the accidental separation of the separable sections of a detachable connecting plug comprising a ring for engagement with one end of the plug, and a i r able to a position at the opposite end of the plug for preventing endwise separation of the sections, substantially as set forth.
5. A device for preventing the accidental separation of the separable sections of a detachable connecting plug comprising a ring for enga ement with one end of t e plug, and a ho y pivoted to said ring and swing:
able to a position at the opposite end of the ody pivoted to said ring and sw1ng-' plug for preventing endwise separation of the sections said body being slotted to permit the electrical wires to pass to the'center of the same, substantially as set forth,
6. An electrical connection comprising separable sections, a ring surrounding one section, oppositely disposed parallel lugs formed on said ring, a disk having parallel arms pivoted to said lugs and a slot in said disk to permit the electric wires to pass to the center of the same to prevent accidental endwise separation ofthe sections, substan JESSE ii. HENRY,