US 3229240 A
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Description (OCR text may contain errors)
Jan. 11, 1966 so 5 ETAL 3,229,240
ELECTRIC CABLE CONNECTOR Filed March 12, 1963 Ob 10a fizlbllllllllim r 13 Bun, 2
INVENTORS WILLIAM B. HARRISON 5R. F G 5 BY WILLIAM EHARQISON JR.
$ M QM AT TORNEY United States Patent 3,229,240 ELECTRIC CABLE CGNNECTGR William B. Harrison, Sr., Oak Park, and William B. Harrison, Jan, Western Springs, 151., assignors to Brad Harrison Co., Hillside, Ill a corporation of Illinois Filed Mar. 12, 1963, Scr. No. 264,547 2 Claims. (Cl. 339-170) This invention relates to electric cable connectors and more particularly to an auxiliary electrical connector that eliminates wear and tear and replacement of connectors that are difficult to replace.
It has always been a problem in the electrical connector field to avoid wear and tear on an electrical connector which is difficult to replace as almost invariably such a connector is located and disposed in an electrical system at a point where it receives considerable abuse and wear and tear. Therefore it is inevitable that such a connec tor must be replaced from time to time and it presents an inconvenience and hardship on the replacers thereof. For the purpose of this application, such a connector will be called a critical connector.
Our invention is intended to eliminate wear and tear on a connector which is dilhcult to replace by shifting the wear and tear to an auxiliary connector which is easily replaced.
In accordance with our invention, we have provided an auxiliary electrical connector which has a means for firmly locking it to a critical connector to save wear and ear on said critical connector and means for unlocking said locking device conveniently in order that said auxiliary connector can be replaced with a minimum of inconvenience.
Although we have illustrated our auxiliary connector utilized in combination with a permanent male connector and critical female connector that is attached to a permanent lead, our invention should not be limited to this as we intend it to cover auxiliary connectors used with other types of male and female connectors. 7
It is therefore an object of this invention to provide an auxiliary connector which will eliminate or lessen the amount of wear and tear on a critical connector when associated therewith.
It is further an object of this invention to provide an auxiliary electrical connector which has a novel locking device that enables it to be associated with a critical connector in a locked relationship thereby eliminating or lessening the amount of wear and tear to said critical connector.
Still even further, it is an object of this invention to provide an auxiliary connector which can be associated with a critical connector to transfer the wear and tear from said critical connector by being firmly locked thereto and having the ability to be conveniently disassociated therefrom, thereby enabling it to be replaced conveniently.
Still even further, it is an object of this invention to provide an auxiliary connector having male connector portions projecting therefrom which firmly lock with a critical female connector portion that is diffioult to replace and having a female connector portion on the other side thereof for connection to a male connector portion thereby eliminating or lessening the amount of wear and tear to said critical female outlet portion.
Other and further objects of this invention will become more readily apparent when taken in conjunction with the description and drawing wherein:
FIG. 1 is a side elevational view of our invention shown in disassembled relationship with a permanent male connector portion on one side thereof and a critical female connector portion permanently attached to a cable on the other side thereof;
FIG. 2 is a view taken on a plane passing through the line 22 and looking in the direction of the arrows in FIG. 1;
FIG. 3 is a view taken along the line 3-3 in FIG. 1 and looking in the direction of the arrows;
FIG. 4 is a partial half sectional view of our invention illustrated in FIG. 1; and
FIG. 5 is an enlarged view of a portion of our invention illustrated in FIG. 4.
Referring more in detail to the drawing, our auxiliary electrical connector is illustrated generally as a device having an outer body 19 which can be molded into different shapes but is preferably illustrated as rectangular. The body 10 is made of a molded insulating material such as rubber, and has a male connector portion 10a and a female connector portion 10b. The male connector portion 1% has a plurality of conductors 13 projecting therefrom and has a cavity portion 14 formed therein which is shaped to receive a connector such as the critical female connector portion 16.
The conductors 13 extend from the end of the female connector portion 10b of the auxiliary connector and project outward of the end of the male connector portion 10a. The conductors are hollow and have a cylindrical portion 20 at one end sized to receive the conductor portions ,of a male connector such as the permanent male connector 31a. There are shoulder portions 21 intermediate the ends of the conductor portions 13. And tapered bores 20a lead from the shoulder portions 21 to the other ends of the conductors 13 which are part of the male connector portion 10a; indentations 13a in the conductor portions 13 enable the conductor portions to be positioned and retained in the body 16 of our auxiliary connector. Retaining means such as the projections 18b are disposed to be received by the indentations 18a when the conductor members 13 are properly positioned in the body 10 of the auxiliary connector. The tapered hollow portion Zita is threaded at 26b and it communicates with an opening 25 on the side thereof as illustrated in FIGS. 4 and 5. The opening 25 is cylindrical in shape and converging portions 27a at each end thereof to retain a spherical bearing 27 are disposed therein. A tapered pin means 22, having a tapered pin member 22a that is integrally attached to a screw means 221), is disposed in the conductor portions 13 as illustrated in FIG. 4. It will be seen that the screw means 225; has a head that is retained by the shoulder 21 and the screw means is sized to threadedly engage the threaded means Zllb of the tapered hollow portion 20a, as illustrated in FIG. 4. And when the screw means 22b has its head resting against the shoulder 21, the tapered pin 22a forces the bearing 27 to have a portion thereof projecting outward of the conductor portions 13. With this type of structure, the bearing means 27 is forced against a critical female connectors inside surface to form a locking relationship. It should be realized, that although the opening 25 is cylindrical and has the converging portions 27a at each end thereof to retain the bearing 27, different arrangements are contemplated in accordance with the shape of the bearing means 27 which can also be altered. Also the screw means 221; is made with any well known head which can be caused to turn because of its being able to be engaged by a screw driver or the like and access thereto is gained by inserting a tool through the portions 20. The conductor portions 30 are provided as ground ing means and also for the purpose of positioning the auxiliary connector properly for an aligning connection with the other connectors.
It will therefore be seen that when our auxiliary connector is intended for use, the male connector portion a is associated with the critical female that the conductor members 13 protruding therefrom are received therein. Then the tapered pin means 22 are inserted into the hollow openings through the cylindrical portions until they are in alignment with the tapered hollow portion 20.2. 'A tool can be used to cause the screw means 22b to threadedly engage the threaded means 20b until the head of the screw means 22b is in contact with the shoulder portion 21. With this action, the tapered pin means 22' is forced downward through the tapered hollow portion 20a until the tapered pin 22a causes the bearing means 2 7 to project outward therefrom and into contact with the inner walls of the critical female connector 16 to create a locking relationship therewith. The auxiliary connector being locked into association with the critical female connector 16, then has the female connector portions 10b thereof associated with the permanent male connector 31a by having the conductors thereof inserted therein.
It is manifest that the critical female connector portion 16 does not receive the wear and tear that it would have received had the auxiliary connector not been used. Instead of this, the female connector portions of the auxiliary connector receive the wear and tear and abuse that would have before been borne by the critical female connector member 16. Therefore when it is discovered that the female connector portions are Worn,
the auxiliary connector can be replaced conveniently by disassembling it from the circuit. When this is desired the auxiliary connector is conveniently disassociated from the permanent male connector portion 31a and the tapered pin means 22 is disassembled by unscrewing it thereby unlocking the auxiliary connector from the critical female socket portion 16. Then a new auxiliary conector can be assembled into the arrangement and in the same manner as before thereby extending the life of the critical female connector and obviating the necessity for replacing it with a great amount of inconvenience to the replacers thereof.
Although we have shown a specific construction of our device, we are fully cognizant of the fact that many changes in the shape and contour may be made without affecting its opcrativeness, and we reserve the rights to make such changes, as we may deem convenient without d p rt ng ro hesr tof ouni ent or h Scope of the claims.
1. An auxiliary electrical connector to increase the usable life of a critical female connector comprising:
a male connector portion including at least one male prong, said male prong having a hollow portion extending lengthwise therewithin;
side opening included in said one male prong and communicating with said hollow portion;
a bearing member restricted in said side opening, said side opening being dimensioned to permit said bearing member to protrude out therefrom into the hollow portion of said male prong when in a first operative position and to protrude out therefrom into the outside of said male prong when in a second operative position, said one male prong being insertable into said critical female connector when said bearing member is in said first operative position; and
a tapered pin removably inserted into said hollow 'portion of said one male prong, said tapered pin controlling the' force applied bysaid bearing member against the inside of said critical female connector when said bearing member is in said second operative position.
2. An auxiliary electrical connector, as defined in claim 1, wherein said hollow portion of said 01161112116 prong is tapered to receive said tapered pin, the positioning of said tapered pin within said tapered hollow portion controlling the force applied by said bearing means against the inside of said critical female connector.
References Cited by the Examiner UNITED STATES PATENTS 2,822,986 2/1'958 Schreier.
2,912,667 11/1959 Sloat 339--267 X FOREIGN PATENTS 843,859 10/1960 Great Britain. JOSEPH D. SEERS, Primary Examiner. W. DONALD MILLER, Assistant Examiner.