DE1187289B - Socket - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

H02f

German class: 21c-22

Number: 1187 289

File number: B 67152 VIII d / 21 c

Filing date: May 8, 1962

Opening day: February 18, 1965

The invention relates to electrical connectors in which electrical connections are made through Inserting a plug into a socket can be made according to patent 1113 493, in particular on plug contacts for use in easily detachable electrical connectors that consist of plugs and assemble the socket.

An object of the invention is to provide a plug contact that has a long service life in operation and within a large temperature range has a safe and inevitable creates electrical connection.

Another object of the invention is to provide a novel plug contact that is economical manufactured, easily assembled and used advantageously in a multiple socket can be.

The plug contact according to the invention relates in detail to a socket with a Longitudinal bore located therein for receiving an associated plug, one in the socket located bimetallic leaf spring to interact with the plug, the leaf spring through a slot extending in the longitudinal direction in the wall of this bore becomes effective, as well as an elastic, longitudinally split sleeve which surrounds the socket body and which tightly fits the plug socket surrounds to keep the leaf spring on the socket in the working position, according to patent 1113 493.

The invention consists in that the sleeve is made of an elastic material with such thermal expansion properties is made with the thermal expansion properties of the leaf spring in such a way are related that the engaging force of the leaf spring is within the temperature range in which the socket is used, is kept within predetermined limits.

The plug contact of this invention can be used in an advantageous manner in connection with nozzle, Lormoder Rocket engines are used as well as in a thermocouple, which during the Use is heated from ambient or room temperature to high temperatures. A In a typical application of this type, the plug contact can have temperatures of the order of magnitude Reach 540 to 950 ° C. In many areas of application it is necessary within the whole Temperature range from the ambient temperature to the highest possible temperatures a good to maintain electrical contact between the plug and the socket of this connection. It is also necessary that the connector of the female connector

Addendum to the patent: 1113 493

Applicant:

The Bendix Corporation, Detroit, Mich. (V. St. A.)

Representative:

Dr.-Ing. H. Negendank, patent attorney,

Hamburg 36, Neuer Wall 41

Named as inventor:

Harry Edward Barnhart, Sidney, N. Y. (V. St. A.)

Claimed priority:

V. St. v. America May 9, 1961 (108 832) - -

art is such that it makes such electrical contact during a large number of work cycles with alternating heating and cooling of the connector can be maintained.

The plug contact according to the invention is such that, as can be seen from the following, its size and weight are only slightly higher than known sockets.

The plug contact according to the invention is of a simple and economical construction and easy to assemble. As a result, it is excellent for use as a multiple plug, in which a number of plug sockets in an insulating insert or in a connector part are arranged.

The features of the invention are evident from the following description in conjunction with the drawing more clearly.

F i g. 1 shows a side view of a plug contact according to the present invention, wherein a The plug works properly with the socket at room temperature;

FIG. 2 shows an enlarged section along lines 2-2 of FIG. 1 and 6 through the socket according to FIG. 1, the parts of the plug contact are arranged in the position they are in Take room temperature in the absence of a plug in the socket;

509 509/310

3 4

F i g. 3 shows an enlarged vertical line as in FIGS. 2, 3 and 5, an open one

Section along line 3-3 of FIG . 1 is created by a pas slot 26 through which the groove with the

send socket and an associated con-hole 22 is provided. The distance between the edges

clock connector according to Figure 1 at room temperature; this slot from each other is much smaller

F i g. 4 is a plan view of the leaf spring 5 as the diameter of the plug 12, creating a

formed bimetallic contact element of the plug- Escape of the plug from the bore formed-

contacts; is closed.

F i g. 5 shows a vertical cross section through the bimetallic leaf spring 16 is so wide that it is flat

the matching sockets and plug parts lie on the flat side section of the groove 20,

after line 5-5 of FIG . 7, with the parts in the io if there is no plug in the bore 22 ,

Positions are arranged which they are heated when the edges of the leaf spring from the edge of the

tion of the socket and the pin on the raised body 14 are slightly radially inward.

Take temperatures; The bimetallic leaf spring 16 is preferably little

F i g. 6 shows an illustration of the socket outlets somewhat shorter than the groove 20 according to the illustration

socket at room temperature in longitudinal section; 15 development in FIG. 6 and 7, with the ends of the

Fig. 7 shows a longitudinal section through the male metal leaf spring a little from the front and rear bucb.se having disposed therein a plug, wherein wärtigen ends 30 and 34 of the groove 20 is shown at a distance from the plug in view and the parts are held in . Such a relationship of the length of the full lines shown in the positions of the groove and the leaf spring allows an easy to be that they are at room temperature of the socket 20 assembly by a machine. In order to facilitate and take the plug, while the bimetalation of the insertion of the plug 12 into the Boh lische contact element and the holding sleeve in the notch 22, the front end of the leaf spring 16 is shown with lines in the positions shown in FIG the middle arranged and curled up they occupy at elevated temperature; Zone 36 provided. Preferably, as shown, the

F i g. 8 shows a top view of the blank, a leaf spring 16 similar to it bent upwards from FIG

which the holding sleeve for the contact elements part 38 at its rear end, so that both

is formed. Ends of the leaf spring have a similar shape.

The socket 10 consists of only three parts. With such a construction, the leaf spring

a socket body 14, a contact spring 16 and inserted into the groove 20 in both directions

an elastic spring retainer 18 which is telescopic 30.

like over the front part of the socket body 14 In the embodiment described, this is pushed. The spring 16 consists of a bimetallic metal layer of the bimetallic leaf spring, which has the apparent material and is held by the sleeve 18 in a greater coefficient of thermal expansion, the groove 20 of the socket body 14 . The book is arranged radially outwards.
The body is designed so that it has a plug 12 35. The sleeve 13 is made of a nickel alloy to accommodate a plug part 11 and to form a reliable spark-free contact with it from a sheet metal blank, as shown, for example, in FIG . 8 shown where it is a slight separation of the plug and denoted by 40 at the same time. Such a blank can be removed from the socket by moving it apart from a flat main part 42, which allows a width of the two parts in the axial direction. 40 central slot 44 which is generally V-shaped

The socket body 14 is preferably made of heat and arranged at one end of the main part

Resistant metal, for example made of nickel or nickel, and a central projection 46 on the

made of clad steel. The front outer other end of the main part, the one wide

The end of the socket body 14 is V-shaped with a bore corresponding to the slot. Preferential

22 provided that the connector 12 of the above 45 wise the direction of the rolling of the raw

Plug part Jl slidably receives. The open end lings 40 formed grain chosen so that it is in

or the mouth of the bore 22 is preferably in a direction perpendicular to FIG. 8 runs. Of the

bell-shaped, as shown at 24 , around blank 40 is in such a way connected to a sleeve 18

to facilitate the insertion of the plug 12 , which molds to be around a suitable body.

Diameter only slightly less - usually about 50 is bent. After the sleeve 18 is formed,

0.05 to 0.125 mm - as the diameter of the drill - it is telescoped over the body 14 of the plug

tion 22 is. The other, rear end of the basket bushing is pushed so that it fits into the wide,

pers 14 is drilled out quite deep, around the front shallow groove and the bimetallic leaf spring 16

Take up the end of a pipe (not shown). This is essentially superimposed over its entire length.

other end of the tube is widened with a 55. Preferably, the length of the sleeve 18 is according to the

connected cylindrical part, which at its representation in the F i g. 1, 6 and 7 a little lower

rear end an appropriate recess than that of the groove 48, the front and

has, which forms a soldering hole . rear edges of the sleeve slightly different from the front

The groove 20, which is provided with a flat bottom , has its or rear edges of the groove 48

extends across the socket body 14 and 60 are spaced apart. The sleeve 18 has

has such a width that it differs preferentially from the rear tensioned state at room temperature.

The end of the bell-shaped mouth has an inside diameter that is essentially

NEN part slightly over the inner end of the bore equal to the diameter of the bottom of the groove 48 on

22 extends out. the body 14 is.

The groove 20 can be guided, for example, by 65 at room temperature when in the bore

a milling tool transversely through the body 14- 22 no connector is arranged, the parts 14, 16 and

be procreated. The radial depth of the groove 20 is so 18 arranged with respect to one another as it is in FIG

dimensioned that it cuts the hole and that the F i g. 2 is shown. If at room temperature

a plug 12 is inserted into the socket, as shown in FIG. 3 is shown, then the bimetal leaf spring 16 slightly raised by the plug, so that the sleeve 18 yields somewhat as shown and opens. The through the Stekkerl2 and the sleeve 18 on the bimetallic leaf spring 16 forces have the consequence that the contact element bends slightly about its longitudinal axis, as shown in FIG. 3 is shown.

If the matching sockets and plugs are exposed to elevated temperatures, for example up to a height of 650 ° C., the arrangement of the parts changes from that in FIG. 3 shown in the arrangement shown in FIG. There the metal of the bimetal leaf spring with the higher coefficient of expansion in the embodiment shown is arranged radially outward, the bimetal element bends when the temperature rises a little further out of its slightly bent position according to FIG. 3, and the leaf spring bends according to the dashed lines in Figure 7 in the longitudinal direction outward. If the sleeve 18 does not were resilient, this would result in a high contact pressure between the leaf spring 16 and the plug 12 result. According to the embodiment of the invention, the elastic sleeve has 18 such a thermal expansion characteristic that its loss of radially inwardly directed, on the Bimetal leaf spring exerted force in general the otherwise excessively high contact holding force, the generated by the bimetallic leaf spring 16 as it expands, compensates. The bimetal leaf spring 16 therefore cooperates with the elastic sleeve 18 to reduce the contact pressure between the bimetal leaf spring 16 and connector 12 within the required, predetermined limits.

The relationship between the thermal expansion properties of the sleeve and the bimetal leaf spring is such that in the lower temperature range, for example between -73 and 38 ° C, the thermal Expansion effects of the sleeve and the bimetallic leaf spring together the force that to the Disconnecting the plug is required, generally keep it constant. In the upper temperature range, for example from 38 to 650 ° C and above, caused by an increase in the separation force Expansion of the bimetallic leaf spring, the relaxation of the sleeve, a reduction in this force. The two Effects are therefore oppositely directed, with the result that if one occurs excessively prevents high contact pressure between the bimetallic leaf spring and the plug and any Possibility of overloading the bimetal leaf spring if it is used for a long time at elevated temperatures is kept in cooperation with the plug in the socket, is turned off.

Although the bimetal leaf spring 16 has been described so that the metal part that has the higher coefficient of expansion has, lies radially outward, but this leaf spring 16 can be reversed Direction of the projection of the parts 36 and 38 are arranged so that the metal part with the higher expansion coefficient lies radially inward. In the latter case, the bimetallic leaf spring would 16 under the effect of elevated temperatures in opposition to those in FIG. 5 and 7 Bend the directions shown. Under such conditions, the lengthwise direction would be in the Central part of the bimetallic leaf spring 16 is closest to the connector 12 for cooperation come, and the opposite ends of the bimetal leaf spring would be strongest with the retaining sleeve 18 come together.

The socket body according to the invention is constructed so that when the socket is assembled, the bimetallic leaf spring and the spring holding sleeve can be added to the socket after machining. Such a manufacturing process can include, for example, that the body ¹ is subjected to extremely high temperatures, such as occur when soldering connections. It is therefore not necessary to expose the spring and the sleeve to the risk of damage to temperatures higher than those for which these parts are intended, since they are installed in the socket after these operations have been carried out.

Although only a single embodiment of the invention is shown in the drawings and in the description has been described, however, it is expressly pointed out that various modifications in terms of the dimensions of the parts of the material used, etc. as well as in terms of the proposed type of use of the device according to the invention are possible without leaving the field deviate from the accompanying claims.

Claims (3)

Patent claims: 1. Electrical socket with a socket body with a cylindrical longitudinal bore located therein and one in the longitudinal direction in the wall of this bore extending slot, a bimetal leaf spring for cooperation with a cooperating plug inserted into the bore through the slot and a the socket body closely surrounding the longitudinally split sleeve, which the leaf spring in their active position on the bushing, according to patent 1113493, characterized in that that the sleeve (18) made of an elastic material with such thermal expansion properties is made, which with the thermal expansion properties of the bimetal leaf spring (16) are related in such a way that the engaging force of the leaf spring is within the temperature range, in which the socket is used, is kept within predetermined limits. 2. Electrical socket according to claim 1, characterized in that the sleeve (18) from a simple sheet metal layer (40) is made, the mutually facing edges (44 and 46) are kept a little apart from one another at room temperature and at least overlap a zone on the circumference at an angle above the sleeve. 3. Electrical socket according to claim 2, characterized in that this zone of circumferential overlap the ends of the sheet metal (40) arranged in the longitudinal direction in the middle of the sleeve is. 1 sheet of drawings 509 509/310 2.65 © Bundesdruckerei Berlin