US1751981A - Contact plug - Google Patents

Description

yMamrnrzh 25 1930. A HD5 JONG ET AL CONTACT PLUG Filed May 3l, 1924 fHaa,

Patented Mar. 25, 1930 UNITE-DX STATES PATENT OFFICE HENDRIK DE JONG, DIRK LELY, JR., AND RICHARD SHEPHERD, OF EINDHOVEN,

NETHERLANDS, ASSIGNORS T N. V. PHILIPS GLOEILAMPENFABRIEKEN, OF EIND- HOVEN f i CONTACT PLUG .Application led May 31, 1924, Serial No. 716,996, and in the Netherlands .Tune 9, 1923.

As a rule the contact pins of pin-plugs are shaped as metal pegs with a circular crosssection and are provided with a saw-notch extending over a certain length ot the peg and disposed along the centre of the peg.

The manufacture of such contact pins has the disadvantage that it is diiiicult to dispose the saw-notch exactly along the centre.

Furthermore the production of the sawnotch entails loss of material and the contactpins often break ofi at the end ot the sawnoteh which has sharp angles.

The invention has for its particular object to improve the construction of contact-pins i5 and their attachment in the insulating material.

According to the invention the contact-pins consist of two or more resilient parts disposed against each other in the insulating material. -In a practical construction the two halves may have a semi-circular cross-sectlon, their iiat sides being arranged against each other they may be disposed in the insulating mate-v rial separately from each other in various i ways; Those ends of the halves which are lying within the insulatingmaterial may be united, for example by shaping theaggregate of the contact-pin as a split-pin, the bent end of which is secured in the insulating material.

For fixing the leading-in wire to a contactpin a metal member may be disposed around the contact-pin adjacent that side of the 1nsulating material from which the contact pins'extend, and the leading-1n wire for the said contact-pins may be led through a hole in the insulating material and a corresponding aperture in the metal member, the leading-in wire` being secured to the latter by soldering. The said metal member may consist y of an annular metal box disposed around the contact-pin and having the leading-in wire iixed thereto by soldering. The metal member according to the invention may conslst of a metal rin to which the leading-in wire may be secure by means of soldering material which lills the aperture through which the wire is led. The said aperture may in this case break through the inner side ot the riig. 5 ccording to the invention the metal memmaterial.

berlmay be embedded in the insulating mater1a The accompanying drawing diagrammatically illustrates some constructions embodying the invention. In the said drawing:

Figure 1 is a View of a two-pin plug according to the invention.

Figui-e2 is a view partly in section of a pinplug according to the invention, having differently constructed contact-pins and being provided with metal contact-boxes.

Figure 3 is a view of a third construction embodying the invention which is also provided with contact-boxes.

Figure 4 is a side view, partly in section, of another modified form of pin-plug,

Figure 5, is a plan view of the pin-plug shown in Figure The construction shown in Figure 4 comprises contact pins31, 32, 33 and 34, which are executed as the pins shown in Figures 1, 2 and 3, and which are fixed at their ends in insulating material 30. The attachment of the leading-in wire to the contact pins is clearly shown in detail at pin 32.

The pin-plug shown in Figure 1 consists ot' a bottom 1 of insulating material, in which the contact-pins are secured by pressing aroundl them the insulating material. One contact-pinconsists of two halves 2 and 3 having a semi-circular section and being both provided at their lower ends with curved extremities v4 and 5, disposed in the insulating The other contact-pin 6 consists also of two halves. A leading-in wire 8 passes through anaperture 7 in the insulating material and is disposed around a contact-pin, to which it may be fixed in any suitable manner, for example by soldering.

In the construction shown in Figure 2 contact-pins 11 and 12 have the shape of splitpins, the eyes of which are embedded in the insulating material. Around the contact-pins are disposed small metal boxes 13 and 16, which serve for the attachment of leading-in wires 14 and 15. As shown in the cross-sectional right half of the iigure, a leading-in ,wire 15 passes through an aperture in the in- It is of course obvious that in the first three j figures the two contact pins are illustrated as being turned 90 relatively to each other.

The construction shown in Figure 4 comprises contact- pins 31, 32, 33 andv 34 which are executed asthe pins shown in Figure l,

'2 or 3 and whichv arexed at their ends in insulatingmaterial 30.' The attachment of the leading-in wire to the contact-pinis clearly .shown ian detail at the pin 32. The latter is surrounded by a metal ring 36 which like the pin iscomposed of brass and is slidv .over thei'said pin. The ring has an aperture 37 corresponding with a hole ing material. A leading-in wire 39 is led through the said holes and secured to the ring 36 by reason of the hole 37 being filled with soldering material. Subsequent to the fixing operation the leading-in wire is cut above they hole 37 and the Soldering material ofthe ring may be y'face,lfofr example sov thatthe surface of theL wire Aof the ring with the naked eye.

remaining above the hole is preferably removed. For this purpose the upper surface milled `off with a cutter, which ensures 'avery handsome finish so that it is diiiicult to perceive the attachment ofvltle e vringf36 is embedded in the insulating material and is provided with a small flange 45 1n order to improve its attachment.` Obviously the ring may be disposed in the material at amore orless great distance below ,the surinsulating material land the surfaces ofthe rings fare at aleve The position of the contact pins relative toeach'o'theris shown in "Figure 5.,v From is brokenuthrough'. lBy-.iilling this figure it is also' clear that the hole 37 in thering 36 is disposed quite closely to the contact-,pin 32 so that the inner wall ofthe ring the hole 37 with soldering material, the ring, the wire and the pin are rigidly secured to each other and al good electric contact is obtained. The hole 37 may befrlisposed in a somewhat inclined direction so that the inner wall of the ring is brokenl throu h at 4.a lower part.

1. An electric contact plug havingcontact pins consisting of Atwo or more resilient solid parts disposedlagainst each other, the ends of said parts'being material and joined together `forming a ring at thepoint of joining. j

2. An electric contact plug having con- 38 in the'insulatembedded in the insulatingA tact pins consisting of twovor more resilient solid parts disposed against each other, the

ends of said parts being embedded in the insulating material and joined together forming a ring at the point of joining, and a metal member disposed around one or more contact pins adjacent that part of the insulatngdmaterial from whichthe contact pins ex- 3. An electric contact plug having contact pins consisting of two or more resilient solid parts disposed against each other and embedded at their endsvdirectly into the insulating material, and an annular metal box disposed around one or more of the contact pins.

4. An electric contact plug having contact pins consisting of two or more solid parts disposed against each other, the ends of said parts being embedded. in the insulating material and joined together forming a ring at the point of joining, and an annular metal box disposed around c each of the Contact pms. I l' 5. An electric contact plug having contact -pins consisting of two or .more resilient solid parts disposed against each other, the ends of said parts being embedded in the insulating material and joined together forming a ring at the point of joining,and a metal ring disposed around thecontact pins and embedded in the insulating material.

6. An electric contact plug having contact n pins consisting of two or more resilient solid parts disposed against each other, the ends of which are-embedded directly into the insulating material, a metal member disposed* around one or more .contact pins, and'aleadlng-in wire for each of said contact pins led through a hole in the insulating material and a corresponding aperture in the metal member, the leading-.in wire being lixedto the said parts being embedded in the insulating.

material and joined together forming a ring at 'the point` of joining, la metal box disposed around the contact pins, and a leadingin wire fixed thereto by soldering.

9'.' An electric contact plug having contact pins consisting of two or more resilient solid parts disposed against `each other andeml edded at thelr ends directly into insulatf ing material, and a metal boX disposed around one or more of the contact pins.

10. An electric contact plug having contact pins consisting of two or more resilient solid parts disposed against each other and embedded at their ends directly into the insulating material, and a metal box disposed around one or more contact pins adJacent that side of the insulating material from which the contact pins extend. v

11. An electric'contact plug having contact pins consisting of two or more resilient solid parts disposed against each other, the ends 'of said parts being embedded directly in the insulating material and bound together to form a ring atl the point of joining,

and a metal ring disposed around one or more of the contact pins. l

12. An. electric contact plug havmg contact pins consisting 'of two or more resilient solid parts disposed against each other and embedded at their ends directly into the insulatl ing material, and a metal box disposed around one or more of the Contact pins and embedded in the insulating material.

In testimony whereof we ailX our signatures.

VHENDRIK DE JONG. DIRK LELY, JR.

RICHARD SHEPHERD.

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