US 1522574 A
Description (OCR text may contain errors)
Jan. 1925- 1,522,574
R. B. BENJAMIN ELECTRI CAL CONNEGTER DEVI CE Filed Dec. 12, 1919.
REUBEN B. BENJAMIN, OF CHICAGO.
ILLINOIS, ASSIGNOR TO BENJAMIN ELECTRIC MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.
ELECTRICAL conunc'rnn ronvrcin.
Application filed December 12, 1919. Serial No.
To all whom it may concern:
Be it known that I, REUBEN B. BENJAMIN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Electrical Connecter Devices, of which the following is a fullfigl ear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.
This invention relates to electrical connecter devices.
One of the purposes of this invention is to provide a suitable connecter device for use for low voltage circuits. In farm lighting systems where low voltage circuits are generallv used, the same lighting power is desired as in the higher voltage circuits.
It is necessary. the"efore, in farm lighting systems. using low voltage, that the translating device used (such'as lamps, heaters and so forth) be of low resistance so that a high amperage is necessary. Therefore,
where plug-in devices are to be inserted into receptacles, this high amperage at the point of connection would burn out the contacts unless a quick and positive connection is made between the plug and receptacle.
It is. therefore, one object of my invention to provide a connecter device whereby a positive and quick electrical connection is accomplished between the parts.
Another object of'mv invention is to provide means whereby upon the initial engage ment of the parts with respect to each other, no elect ical connection is accomplished but a substantial resistance is met with and whereby upon further insertion of the memher. the resistance is overcome and a positive and quick electrical connection is effected.
Another object is in the provisiornof these means in a neat and compact arrangement.
Further objects will appear from the de-.
scription and appended claims.
In the drawings I Fig. 1 is a longitudinal side the connecter device;
Fig. 2 is a longitudinal sectional view on elevation of the line 22 of Fig. 1 showing the parts out.
Fig. 3 is aview on phe line 3-3 of Fig.2: Fig.4 is a view on the line 4-4 of Fig. 2 looking in the direction of the arrows: I Fig. 5 is'a view on theline 5-5 cof Fig. 2 looking in the direction of the arrows,
, openings Fig. 6 is a detail sectional view showing the cap blade entering the receptacle; and Fig. 7 is a sectional view-on the line 7-7 of Fig. 6.
In order to give a general idea of the invention, it is here stated that the construe tion shown comprises a receptacle 10 having a pair of wiring terminals 11- for the feed wires and a pair of spring contact devices 12 and 12 electrically connected with the wir ing terminals respectively for engagement with the contact blades 13 on ,the cap 14:.
In order that the first engagement between the two parts of the connecter device may not establish an electrical connection, the tips of the spring contact device 12 of the receptacle are provided with insulating V blocks located in the pathof the contact blades of'the cap so that the cpntact blades, when the connection is being made, first en-- gage the insulating blocks and cause resist-- ance to the making of the connection which the person who is making the connection overcomes by an ene getic push on the cap causing the actual electrical connection to be quickly made.
lhe receptacle comprises a base portion 15:1 to which the wiring terminals 11 and spring contacts 12 and 12 are secured and a cover portion 16 having recesses 17 into which the spring'contacts extend and having restricted 18 leading to the recesses. the restricted openings affording a guide and passave for the contact blades of the cap:
T he cap portion 14 comprises in addition to the contact blades 13 previously referred to an insulating base 14* on which the contact blades are supported, and a pair of binding screws 19. one for each of the contact blades, 5 I
wires and electrically connecting them with the contact blades,
To give a more detailed description of my construction, the receptacle 10 comprises the insulating base 15 having the recesses 17 therein. in which recesses are mounted binding plates 20 having binding screws tiltably mounted therein. The construction of the binding plate and tiltable screw shown herein have been claimed in my application S.- N. 343.250 filed December 8th, 1919.
To state briefly. this construction comprises a binding plate 20 having a fulcrum, portion 21 thereon which is secured by screws 22 to the insulating'base 15. The binding plate is apertured at-23 and has a binding for securing the of insulation extend into said recesses and saTh screw passing-therethrough, said screw havinga nut thereon.
As shown in Fig. 6,-the nut 25 bears on the fulcrum )ortion 21 of. the binding plate so that theinding screw may tilt in the aperture 23 and with respect to the binding plate to hold wires of unequal diameters between the head of the binding screw-24 and the binding plate 20.
The upwardly extendin fingers are secured to the %)l portions 26 upon which the spring contact nding plate 20 by means of two integrally formed spring contact.
fingers are riveted to hold the spring con-,
tact fingers securely position.
in place in an upright As, shown in Fig. 5, the upwardly extending sprin insulation 27 thereon stamping being slotted and the serted in contact finger is crimped at 28 to. cause the g contact finger 12 has a piece of (which may be of a of sheet fibre) this contact finger piece of insulation insaidslot after which insertion the edges of the slot to engage depressions in the piece of held in the contact finger 12.
Secured to the 29, is the insulation whereby it is securely base 15 by means of screws cover portion 16, which is recessed to receive the contact fingers which extend upwardly from said base member. The
contact fingers 12 which support the pieces are in direct alignment with the guiding slots 18 in the oval e spring contact jtend into limited movement within said recesses, as
shown in cesses be1 ortion of the cover 16. ngers 12*, however, ex-' offset recess portions'30 and have a Fig. 2, the ng to keep object of these offset-rethe contact fingers 12.
out of the path of the blades 13 when entering the guide slots avoid premature electrical contact blades 13 with said i The cap 14 comprises an in the cover portion to onnection of said fingers 12.
14; which has secured thereto the contact blades 13 which blades are secured in place by means of metal bushings 31 which are "moulded into the insulating base, these bushings havi ng portions 32 extending throughopenings in the base portions 33 of the blades 13 and being riveted in place. function threaded the insulating base having a central opening for thepassage of the wires which are connected to when the blades 13 are inserted into In use,
.over to hold the blades These bushings 'serve another that they are internally screw receive the binding screws 19.'
in to the binding screws.
resistance is met 1 nection is made between the blades and coning an insulating base, ported thereby and having a slot tl'lQIGlIl,
While I have herein shown butone form of my invention, fic'ations thereof parting from the vention.
.many changes andJnodimay be made without despirit and scope of my in- Having thus described my invention, what I claim as new and desire to secureby Letters Patent is:
1. A recegtacle forcooperation with a plug-in mem er, said plug-1n member comprising an insulating base, and a pair of contact blades supported thereby, said receptacle comprisin an insulating base and a pair of contact ngers supported thereb for engagement with the, blades of the lugin 'member respectively,
7 said insulating base of said receptacle beingrecessed to receive said contact fingers and having openings through which the blades of the plug in member can be inserted for engagement with the contact fingers, and means wherebypn inserting the plu -in member, a yielding efore the electrical contact fingers, said means comprising apiece of insulationcarried by the tip of one of said contact fingers. I 2. An electrical connecter devlce comp-ris g member secured in said and an insulati f slot for engagement with a contact cooperating connecter dev1ce.'
3. An electrical connecter device comprising an insulatingbase, a contact supported thereby having a-slot therein, an'insulating member supported by said contacthaving] notches for engagement with the edges of said slot,'that portion of the contact finger which comprises the slot being crimped to holdtheedges of said slot in said notches.
In witness whereof, I have'hereunto subscribed my name.
REUBEN B. BENJAMIN.
age'the pieces of insulation 27,
yielding a contact finger s'up-