US1431622A - Electrical connector device - Google Patents

Description

R. B. BENJAMIN. ELECTRICAL CONNECTOR DEVICE. APPLICATION FILED 05012. 1919.

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Patented Oct. 10, 1922.

Patented Oct. 10, 1922.

UNITED STATES 1,431,622 PATENT OFFICE.

REUBEN BENJAMIN, OF CHICAGO, ILLINOIS, ASSIGNOR TO BENJAMIN ELECTRIC MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

ELECTRICAL CONNECTOR DEVICE.

Application filed December 12, 1919. Serial No. 344,301.

generally used. To obtain the same light mg power with low voltage, as is obtained with the higher voltage circuits, it is necessary that the translating devices used -(such as lamps, heaters, and so forth) be of low resistance so that a high amperage is necessary. Therefore, where plug-indevices are to be inserted into receptacles, this high amperage at the point of connection would burnout the-contacts unless a-quiok 26 and positive connection is made between the plug and receptacle.

It is therefore one object of my invention to provide 1 improved means whereby a quick and positive connection is provided .30 between these parts, thereby preventing arcing and burning out of the contacts.

Another object of this invention 'isto provide an improved connector device which is so constructed as to form a compact and 8.5 neat arrangement of parts and which will be simple, cheap to manufacture, durable and eflicient in use. p

I Further objects will appear from the detaileddescription and appended claims. In the drawings Fig. 1 is a longitudinal sectional view of a connector device showing the parts in their relative position before engagement;

Fig. 2 is a sectional view on the line 2-2 of Fig. 1;

Fig. 3 is a longitudinal sectional view of the connector device with the parts in engagement; \Y

ig. 4 is a view taken on the line 4-4 of Fig. 1 looking in the direction of the arrows; and

Fig. 5 is a view taken on the line 55 of Fig. 2.. Y 1

",In order to give. a general idea of the 5,5 invention. it is here stated that the constructively, electrically connected with the wirtion shown comprises a receptacle 10 having a pair of wiring terminals 11 and 12 for the feed wires and two pair of spring contact devices 13-14= and 15-16 respecing terminals respectively, for engagement with the contact blades 17 and 18 mounted on the cap 20. An insulated pin 19 is embedded in the cap 20 which insulated pin extends between an upwardly extending spring finger 21 and the contact finger 15. As shown in Fig. 1, the circuit will not be completed upon firstengagement of the blade 17 with the contact fingers 13 and 14 due to the fact that the spring contact fingers 15 and 16 are separated to a greater 'extent than the width of the blade 18 circuit will be completed. The constructionof' the fingers engaging the insulating pin is such that they orm a substantial yielding resistance to the insertion of the plug-in device whereby the operator, upon meeting thisresistance, will give an energetic push on the cap to further insert the blades 17 and 18 and cause a quick electrical connection between the contacting members, thereby completing the circuit.

To give a more detailed description of my construction, the receptacle portion.l0 comprises a -base portion '26 to. which the wiring terminals 11 and 12 and. spring contacts 13, 14, .15 and 16 are secured and a cover portion 22 having a recess 23 into which the spring contact members extend, and having restrictedopenings 24 leading to the recess, said openings providing a passage for the contact blades of the plugin device. The binding plates 11 and 12 are secured in recesses 26 and 27 in the insulating base 26v by screws 28 and threaded into said plates are the binding screws 29 by which suitable conductors may 110 sis.

be securely held. The binding plate 11 has an upturned portion 30 which has riveted thereto the two spring contact fingers l3 and 14 which are positioned to engage the contact blade 17. The contact fingers 15 and 16 and the central finger 21 are bent at right angles at their lower ends and are held between the binding plate 12 (which may be a flat metal stamping) and the insulating base 26 by the screws 28 which secure the binding plate 12 on the insulating base. The central finger 21 and contact fingers 15 and 16 are slotted substantially intermediate their ends whereby a connecting member 31, which may be a suitable metal stamping, may be inserted in said slots passing through the slot in the contact finger 15 and engaging the central finger 21 and the contact finger 16 to connect these two last mentioned members to cause them to move together, the contact finger 15, however, being independently movable with respect to the fingers 21 and 16 and the connecting member 31. The central finger terminates in a curved portion which en gages a corresponding grooved portion near the end of the insulated pin 19 whereas the contact finger 15 is formed into a hook at its upper end.

The cover portion 22 is secured to the base member by means of long screws 32 (Fig. 2)

- which are screwed into suitable bushings embedded in the insulating base of the receptacle. A recess23 is formed in the cover into which the contact fingers and the central finger extend. Suitably located in said cover portion to afford an entrance for the contact blades and an insulated pin for engagement with the spring fingers are the re stricted openings 24.

The cap-20 comprises an insulating base 32 which has the contact blades 17 and 18 mounted thereon The blades are secured to said base by means of screws 33 threaded into bindin plates 34 which are integrally formed witfi, said blades and bent at right "angles thereto whereby they lie in a horizontal plane (Fig. 4). The binding screws 35 are threaded into said integrally formed plates 34 and securely hold suitable conductors. The insulated pin 19, as before mentioned, is embedded in the insulating base 32. The cord grip bushing 25 is threaded into a correspondingly threaded portion in the insulating base and has an aperture therein for the passage of suitable conductors.

The use and operation of the construction described herein is as follows: When the plug-in device is to be inserted into the receptacle portion, the insulated pin is inserted in the central slot of the three slots 24 until it engages the central finger 21 and the contact finger 15. The contact blade 17 will also engage the contact fingers 13 and 14 at the central finger 21 and the hook port-ion this time but no electrical circuit will be completed due to the fact that the contact blade 18 is not in engagement with the contact fingers 15 and 16 which are separated as shown in Fig. 1. At this point of initial engagement, a substantial resistance is encountered before the circuit is completed, the encountering of this resistance by the operator causing him to give a quick and energetic push of the plug-in device for further insertion into the receptacle portion. The result of this action will be to insert the contact blade 17 between the contact fingers 13 and 14 and the insulated pin 19 between of the contact finger 15 which action will draw the contact finger 16 inwardly due to its bein connected with the central finger 21 by t e connecting member 31 and the finger 15 will be moved outwardly whereby the contact blade 18 will be received between the fingers 15 and 16 to electrically connect the blades and contact lingers and complete the circuit.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A connector device comprising a plugin' portion and a receptacle portion, said plug-in portion comprising an insulating base, a contact blade and a pin, said pin and blade being supported by said insulating base, and said receptacle comprising two contact fingers between which said blade extends, and a third finger between which and one of said, contact fingers said pin extends and a connecting member connecting one of said contact fingers to said third finger to prevent relative movement between the connector fingers, whereby When said plug-in 105 portion is inserted, the pin will separate the members between which it is inserted to force the fingers between which the blade is inserted against the blade.

2. A connector device comprising a plug- 110 in portion and a receptacle portion, said plug-in portion comprising an insulating base, contact blades thereon and a pin, said pin and blades being supported by said insulating base, and said receptacle compris- 115 ing a plurality of contact fingers between .which said blades extend, and a central pleted, but upon further insertion of the plug-in. device, the in will separate the members between wl iich it is inserted to force the fingers between which one of the blades is inserted against said blade to complete the circuit and form an electrical conmotion between the plug-in device and the receptacle.

3. An electrical connector device comprising a plug-in portion and a receptacle portion, said plug-in portion comprising an insulating base, a pair of contact blades and a pin, said blades and pin being insulated from each other by said insulating base, said receptacle comprising an insulating base, a pair of contact devlces for cooperation with said contact blades respectively and a resistance device or offering mechanical resistance to the entry of said pin, an insulat ing cover for said contact devices and resistance member, said insulating cover being recessed to receive said contact devices and resistance member, said insulating cover being provided with a pair of openings for the entrance of said blades for engagement with said contact devices, and being provided with another opening for the entrance of said pin for engagement with said resistance member.

In witness whereof, I have hereunto subscribed my name. REUBEN B. BENJAMIN.

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