US3926495A - Electrical contact body - Google Patents

Electrical contact body Download PDF

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Publication number
US3926495A
US3926495A US52408474A US3926495A US 3926495 A US3926495 A US 3926495A US 52408474 A US52408474 A US 52408474A US 3926495 A US3926495 A US 3926495A
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Prior art keywords
contact
body
triangular
fig
base
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Inventor
Angel Nikolaev Pissarev
Maria Pancheva Miteva
Ivan Velev Balabanov
Lyubomir Dimov Peychev
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Dso Elprom Bg1973112225040
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/06Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00Electromagnetic relays
    • H01H51/28Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed
    • H01H51/287Details of the shape of the contact springs

Abstract

Electrical contact body, particularly useful with low voltages. The contact body has a base in the form of a triangular prism having an isosceles triangular horizontal section with roundedoff peaks. Above the base the body is in the form of a triangular pyramid with rounded-off peaks. The uppermost portion of the contact body has a spherical surface disposed near the peak formed by the equal legs of the triangular prism base, the remaining walls of the triangular pyramid being tangents to the spherical surface.

Description

Unite States Patent Pissarev et a1.

[ Dec. 16, 1975 ELECTRICAL CONTACT BODY Inventors: Angel Nikolaev Pissarev, Sofia;

Maria Pancheva Miteva, Plovdiv; Ivan Velev Balabanov, Plovdiv; Lyubomir Dimov Peychev, Plovdiv, all of Bulgaria Assignee: DSO ELPROM, Sofia, Bulgaria Filed: Nov. 15, 1974 Appl. N0.: 524,084

Foreign Application Priority Data Nov. 22, 1973 Bulgaria 25040 US. Cl. 339/48; 339/278 C Int. Cl. H01R 3/00; HOlR 25/00 Field of Search 339/48, 49, 91 R, 278 C,

References Cited UNITED STATES PATENTS 12/1901 Reichel 339/48 X 6/1941 Chiffey 1. 339/278 C 2,877,439 3/1959 Avery 339/151 M 3,259.870 7/1966 Winkler 339/49 R 3,573,710 4/1971 WOffOrd 339/49 B X 3,853,382 12/1974 Lazar 339/278 C X FOREIGN PATENTS OR APPLICATIONS 839,817 4/1939 France 339/91 R 1,490,729 6/1969 Germany 339/278 C Primary Examiner.1oseph H. McGlynn Assistant Examiner-Craig R. Feinberg [5 7] ABSTRACT 3 Claims, 5 Drawing Figures US. Patfint Dec. 16, 1975 3,926,495

ELECTRICAL CONTACT BODY This invention relates to an electrical contact body for contact commutation apparatus, particularly for low voltages.

An electrical contact body is known, which is used in low-voltage apparatuses such as contactors, relays etc., which is in the form of a parallelepiped with a spherical or flat contact surface. It is a drawback of this body that in commutation the apparatus is worn out irregularly since most part of the contact material in molten and- /or powdered form is carried away by electrodynamic forces outside the limits of the contact body.

It is a general object of this invention to provide an electrical contact body of such shape that in commutation a larger quantity of powdered and molten contact material is retained on its surfaces, whereby to achieve a higher wear resistance with the same quantity of contact material as that used in known bodies, or to achieve an equal resistance to' wear of the Contact with a reduced quantity of contact material.

These objects are achieved by the use of an electrical contact body consisting of a triangular prism with an isosceles triangle with rounded-off edges. The uppermost part of the contact has a spherical surface, which is situated near the peak which is formed by the equal legs of the base of the triangular prism. The remaining walls of the triangular pyramid are formed 'by tangents to the spherical surface.

For a better understanding of the invention, reference should be made to the accompanying drawings in which there are illustrated and described preferred embodiments of the invention.

In the drawings: I

FIG. 1 is a side elevational view of a first embodiment of the contact body of the invention;

FIG. 2 is a view in plan of the contact body of FIG. 1;

FIG. 3 is a cross-sectional view of the contact body of FIG. 1 through its highest portion, the section being taken along with line 3-3 of FIG. 1;

FIG. 4 is an illustration of the position of two opposing similar contact bodies in the contact system, wherein the arrow (1 indicates the direction of motion of the electric arc; and

FIG. 5 is a view in plan of a second embodiment of the contact body of the invention, such body having a lower portion shaped as a dovetail.

The first embodiment of the contact body designated 7 triangle with rounded-off peaks (FIG. 2) and a part similar to a triangular pyramid situated on the prism 1, which has the same base and rounded-off peaks. The uppermost portion of the Contact body (FIG. 3) has a spherical surface 3, drawn to the peak formed by the equal legs of the isosceles triangle of the base of the triangular prism 1. The remaining walls of the part 2 which is similar to a triangular pyramid are tangents to the spherical surface 3.

In order to provide more extended engagements between the uppermost parts of two opposing contact bodies, one of the contact bodies (usually the fixed one) can be made with a flat area in its uppermost portion. In the system of FIG. 4 the contacts are in engagement only at their uppermost spherical surfaces 3, which are of smallest width. The widest and lowest or base part of the contact bodies are oriented in the direction of motion d (FIG. 4) of the electric arc. The electric are produced is moved from the uppermost spherical surface 3 to the portion of smaller height that is, the base which is the widest part of the contact body.

FIG. 5 illustrates a variant of the contact body. The contact body C of FIG. 5 differs from the contact body shown in FIG. 2 in that the body of FIG. 5 is hollowed in its widest and lowest part in the shape of a dovetail.

Although the invention is illustrated and described with reference to a plurality of preferred embodiments thereof, it is to be expressly understood that it is in no way limited to the disclosure of such a plurality of preferred embodiments, but is capable of numerous modifications within the scope of the appended claims.

We claim:

1. An electrical contact body for a contact commutation apparatus, said contact body having a base in the form of a triangular prism having an isosceles triangular section with rounded-off peaks, a triangular pyramid with rounded-off edges disposed on said base, the uppermost portion of the contact body having a spherical surface disposed near the peak formed by the equal legs of the triangular prism base, the remaining walls of the triangular pyramid being tangents to the spherical surface.

2. An electrical contact body according to claim 1, wherein the body in its widest and lowest part is in the shape of a dovetail.

3. A pair of opposed electrical contacts of which one is formed according to claim 1 and the other is made according to claim 1 with the exception that the uppermost portion thereof is fiat.

Claims (3)

1. An electrical contact body for a contact commutation apparatus, said contact body having a base in the form of a triangular prism having an isosceles triangular section with rounded-off peaks, a triangular pyramid with rounded-off edges disposed on said base, the uppermost portion of the contact body having a spherical surface disposed near the peak formed by the equal legs of the triangular prism base, the remaining walls of the triangular pyramid being tangents to the spherical surface.
2. An electrical contact body according to claim 1, wherein the body in its widest and lowest part is in the shape of a dovetail.
3. A pair of opposed electrical contacts of which one is formed according to claim 1 and the other is made according to claim 1 with the exception that the uppermost portion thereof is flat.
US3926495A 1973-11-22 1974-11-15 Electrical contact body Expired - Lifetime US3926495A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BG2504073 1973-11-22

Publications (1)

Publication Number Publication Date
US3926495A true US3926495A (en) 1975-12-16

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ID=3899824

Family Applications (1)

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US3926495A Expired - Lifetime US3926495A (en) 1973-11-22 1974-11-15 Electrical contact body

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US (1) US3926495A (en)
JP (1) JPS5132960A (en)
DE (1) DE2451184A1 (en)
FR (1) FR2252641B3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6116966A (en) * 1998-04-17 2000-09-12 Ati Industrial Automation, Inc. High power electrical contacts for robotic tool changer
US20090011657A1 (en) * 2007-07-06 2009-01-08 K.S. Terminals, Inc. Electrical connector and conducting terminal used therein
CN101609762B (en) 2008-06-16 2012-11-28 日本Ae帕瓦株式会社 Blade-shaped circuit breaker

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4204641C2 (en) * 1992-02-15 1994-09-22 Hella Kg Hueck & Co Contact set
JP5610045B2 (en) * 2013-07-18 2014-10-22 三菱電機株式会社 Contact switch

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US688337A (en) * 1900-02-19 1901-12-10 Siemens & Halske Elec Co Usa Means for electrically connecting railway-cars.
US2246931A (en) * 1938-02-01 1941-06-24 Emi Ltd Method of fabricating connecting leads
US2877439A (en) * 1953-09-22 1959-03-10 Burroughs Corp Electrical slide fastener connector
US3259870A (en) * 1963-03-06 1966-07-05 Albert & J M Anderson Mfg Co Electrical connector
US3573710A (en) * 1968-11-04 1971-04-06 Texas Gas Transmission Corp Means and method for insulating connectors from ambient atmosphere during mating
US3853382A (en) * 1972-04-28 1974-12-10 Burndy Corp High pressure electrical contacts

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US688337A (en) * 1900-02-19 1901-12-10 Siemens & Halske Elec Co Usa Means for electrically connecting railway-cars.
US2246931A (en) * 1938-02-01 1941-06-24 Emi Ltd Method of fabricating connecting leads
US2877439A (en) * 1953-09-22 1959-03-10 Burroughs Corp Electrical slide fastener connector
US3259870A (en) * 1963-03-06 1966-07-05 Albert & J M Anderson Mfg Co Electrical connector
US3573710A (en) * 1968-11-04 1971-04-06 Texas Gas Transmission Corp Means and method for insulating connectors from ambient atmosphere during mating
US3853382A (en) * 1972-04-28 1974-12-10 Burndy Corp High pressure electrical contacts

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6116966A (en) * 1998-04-17 2000-09-12 Ati Industrial Automation, Inc. High power electrical contacts for robotic tool changer
US20090011657A1 (en) * 2007-07-06 2009-01-08 K.S. Terminals, Inc. Electrical connector and conducting terminal used therein
US7628630B2 (en) 2007-07-06 2009-12-08 K.S. Terminals, Inc. Electrical connector and conducting terminal used therein
CN101609762B (en) 2008-06-16 2012-11-28 日本Ae帕瓦株式会社 Blade-shaped circuit breaker

Also Published As

Publication number Publication date Type
FR2252641A1 (en) 1975-06-20 application
FR2252641B3 (en) 1977-08-05 grant
DE2451184A1 (en) 1975-05-28 application
JPS5132960A (en) 1976-03-19 application

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