US2096382A - Electric plug - Google Patents

Description

Oct. 19, 1937 I A.H. RONKA 2,096,382

ELECTRIC PLUG Filed April 24, 1936 v I Arnefifionkw awayam a \mTwsss ATTORNEYS invention. i Figure 2 is a longitudinal sectional view through v resented oecrlallssv I rLuo i gyms. wan-mum. 'Apblication April 24, 1936r8eriallhm 'ifi2ll 3 Claims. (01.; 113-332) 1 This invention'relates to electric plugs and has for an object to provide a device or this character more especially adapted for attaching circuit wires to' electric utensils such as flat irons and the IE like, that will promote ease of application to and removal from the appliance and that will elimihate all binding at the terminals.

. A further object is to provide 'a device of this character which will be formed of a few strong simple and durable parts, which will be inexpensiv'e'to manufacture and which will not easily get out of order.

With-the above and other objects in view the invention consists of certain novel-details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various modifications may be resorted to within the scope-of the appended claims without departing fromthe spirit or sacrificing any of the advantages of the invention.

' Inthe accompanying drawing forming partof this specification,

. Figure 1 is a. perspective view of an electricplug connector constructed in-accordance with th the plug connector.

Figure 3 is a longitudinal sectional view taken on the line 3-3 01' Figure 2, Referring now to the drawing in which like characters of reference designate similar parts in thevarious views, the body I. of the plug is preferably formed or two substantially rectangular molded Bakelite"sections II and I! of hollow construction to form a chamber therebetween, both sections having curved neck sections l3inte-.

I gral therewith and disposed at an angle of about 45 degrees to the median plane of the plug body. Partitions H are formed longitudinally of the sectionsto receive screw pins ii for assembling the-sections. The body is provided with openings 1 IG'to receive the terminal posts of the electric utensil such as a flat iron, and the neck is provided with an opening I! to receive the current supply cable I9 and the usual-spring III which reinforces the cable against breakage due to flexing. 7

YA pair 01" contact members 2| are mounted in V the hollow body Ill, each comprising a pair of 6 sheet metal prongs 22 which are mounted for relative movement into position to grip the bindposts 11 or to position to. release the binding posts. The contact prongs are normaliyheld in "gripping position by a ueshapedspring 23, the

w bight of which engages asainst a pivot pin 24' passed through the hinge ears 9 of the prongs and 21 of the cable is attached to the prong. The 5 contact members 2| are held centered with relation to the post receiving openings l6 by means of three rubber lugs 28, 29, and il'which -are-disposed in alignment transversely acros's'the body as best shown in Figure 2. 10

A pair of similar-push rods 3| extend through openings. formed in opposite sides of the plug body and are provided at their outer ends with heads 32. One push rod contacts with one of the prongs of each pair of prongs constituting a contact 1 member, while .-the other push rod contacts with the other prong'of each pair of prongs constituting a contact member, as best shown in Figure 2 so'that when'the push rods are moved inwardly they swing theprongs of the contact members to 20 release the binding posts ll. Compressible rubber washers 33 are interposed between the sides of the body l0 and the-heads 32 of the push rods I and similar washers 34 are interposed between the her in the act of applying the device to the terminal posts II or removing the device from the terminal posts IT. The rubber washers 33 assist the springs 23 in returning the push rods 3| to inactive position after each actuation.

From the above description it is thought that the construction and operation 01' the invention will be fully understood without further explanation.

What is claimed is:

'1. An electric plug comprising a hollow body, a

.' pair oi contact members mounted in the hollow body, each contact member comprising a pair of sheet metal prongs mounted for relative movement into position to grip terminal posts or into position to release the terminal posts, springsbetween each pair of prongs normally holding the prongs in gripping position, and push rods extend-' ing through the body having their inner ends overlapped and eache ns d ainst one or the 5s it 7' prongs of each pair 01 contact members for opening the gripping ends of the contact members ss lu eonneetoreom rmngahoiiowbodv;

when the pushrods are moved longitudinally of each other.

2. An electric D 8 lapped and engaging respective oneafor the prongs of each pair oiprongs.

amass r pairl oi metal prongsmounted for relativeswinlcomprising a hollow body, pairs or sheet metal Pmngs in the body, the

ingmovementinthebodytogriptermlnalposts or m bpp lance or to release said tor-1* springs normally holding, the prongs I in grinnin -position, there being terminal post, m- 1111188 in said hollow body, resilient members disposed transversely of the body and the prongs'to normally hold the mm centered with relation to the post receiving openingaandpush extending throu h oppo site sides of the plugs and having overlapped 911 mm whereby when the push rods are moved inwardly'the prongs of each pair ends contacting with a prong 0! each pair to releasedfpositlom.

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