CH350730A

CH350730A - Directed spark sliding contact

Info

Publication number: CH350730A
Authority: CH
Inventors: Gehrig Marcel; Etienne Grounauer Louis
Original assignee: Gehrig Marcel; Etienne Grounauer Louis
Priority date: 1959-03-11
Filing date: 1959-03-11
Publication date: 1960-12-15

Description

Contaet glissant ä etincelle dirigee Dans de nombreux appareils et instruments, par exemple dans les pendulettes electriques, an uti- lise des contacts glissants dans lesquels une Premiere piece est deplacee par rapport ä une seconde pike de maniere ä s'approcher de celle-ci, ä entrer en contact avec eile, ä maintenir ce contact tout en ghs- sant Sur la seconde pike, et ä quitter cette derniere pour rompre 1e contact, chacune de ces pieces etant reliee ä un pöle dune source de courant. Sliding contact with directed spark In many devices and instruments, for example in electric clocks, sliding contacts are used in which a first piece is moved with respect to a second pike so as to approach the latter, to come into contact with it, to maintain this contact while sliding on the second pike, and to leave the latter to break the contact, each of these parts being connected to a pole of a current source.

Les contacts glissants connus ne donnent pas entiere satisfaction. La Premiere pike racle la Partie de la seconde piece avec laquelle elle est en con- tact lors du glissement. Ce raclage tend ä detruire la mince couche d'oxyde susceptible de se deposer sur les pieces. Toutefois, 1'etincelle qui se produit quand 1e contact 's'etablit entre les deux pieces et quand il se rompt entraine une oxydation assez importante des pikes, de Sorte qu'ä la longue 1e contact electri- que ne se fait plus correctement. Le but de 1'inven- tion est d'obtenir un contact glissant agence de maniere que 1'etincelle ne puisse entrainer une oxy- dation des surfaces de contact des deux pikes. Known sliding contacts are not entirely satisfactory. The First pike scrapes the Part of the second piece it is in contact with when sliding. This scraping tends to destroy the thin layer of oxide likely to be deposited on the parts. However, the spark which occurs when the contact is established between the two parts and when it breaks leads to a fairly significant oxidation of the pins, so that in the long run the electrical contact is no longer made correctly. The object of the invention is to obtain a sliding contact arranged in such a way that the spark cannot cause oxidation of the contact surfaces of the two spikes.

Le contact glissant ä etincelle dirigee faisant 1'ob- jet de 1'invention, comprenant une Premiere piece conductrice se depla@ant relativement ä une seconde pike conductrice de maniere ä venir en contact avee cette seconde pike en un Premier point de celle-ci, ä glisser Sur eile et ä s'en separer en un second point, respectivement pour etablir, maintenir et rompre 1e contaet, la face de la seconde piece etant ainsi raclee par la Premiere piece entre lesdits points, est carac- t6ris6 en ce que la face de la Premiere pike qui s'approche de la face de contact de la seconde piece forme avec cette face de contact, dans la Position oü 1e contact s'etablit, un angle inferieur ä 45o, et en ce que la face de la Premiere piece qui s'eloigne de la face de contact de la seconde pike forme avec cette face de contact, dans la Position oü 1e contact se rompt, un angle inferieur ä 450, de maniere que les arcs electriques s'etablissent entre les deux pieces, respectivement au moment oü 1e contact s'etablit et au moment oü il se rompt, en des points de la face de contact de la seconde pike situes en dehors de 1'espace compris entre lesdits Premier et second points. The directed spark sliding contact forming the subject of the invention, comprising a first conductive part moving relative to a second conductive pike so as to come into contact with this second pike at a first point thereof. , to slide over it and to separate from it at a second point, respectively to establish, maintain and break the contact, the face of the second part being thus scraped by the first part between the said points, is characterized in that the face of the First pike which approaches the contact face of the second piece forms with this contact face, in the Position where the contact is established, an angle less than 45o, and in that the face of the First part which moves away from the contact face of the second pike forms with this contact face, in the Position where the contact breaks, an angle less than 450, so that the electric arcs are established between the two parts , respectively when the contact is established and when it breaks, at points on the contact face of the second pike located outside the space between said first and second points.

Le dessin annexe represente, schematiquement et ä titre d'exemple, une forme d'exkution du contact selon 1'invention. The appended drawing represents, schematically and by way of example, one form of execution of the contact according to the invention.

Les fig. 1 ä 5 sont des vues de cette formeRTI ID="0001.0270"WI="9" HE="4" LX="1813" LY="1782"> d'exe- cution dans diverses positions des pieces qui la com- posent. Figs. 1 to 5 are views of this formRTI ID="0001.0270"WI="9" HE="4" LX="1813" LY="1782"> of execution in various positions of the parts which compose it .

Le contact represente comprend une Premiere pike conductrice 1, en forme de demi-disque, desti- nee ä eire reliee ä une borne dune source de courant par un conducteur non represente, et une seconde piece conductrice 2 reliee ä 1'autre borne de la source par un conducteur non represente. La piece 1 est solidaire d'un mecanisme non represente, agence pour la deplacer par rapport ä la pike 2. The contact represented comprises a first conductive pike 1, in the form of a half-disk, intended to be connected to one terminal of a current source by a conductor not represented, and a second conductive piece 2 connected to the other terminal of the source by an unrepresented driver. Part 1 is attached to a mechanism not shown, arranged to move it relative to pike 2.

Dans la Position representee ä la fig. 1, la pike 1 est ä distance de la pike 2 et se deplace dans 1e sens de la fleche pour s'approcher de la pike 2, jus- qu'ä venir en contact avec celle-ci. La Position des pieces 1 et 2 au moment du contact est representee ä la fig. 2. Dans cette Position, un point 3 de la piece 1 touche la face de contact de la pike 2 en un Pre mier point 4. La face rectiligne 5 de la piece 1, au moment du contact, fait avec la face de contact de la pike 2 un angle d'attaque a inferieur ä 45 . La pike 1 continue ä se deplacer dans 1e sens de la fleche de maniere que 1e point 3 de la pike 1 soit toujours en contact avec la face de la piece 2 et racle cette face. En un point de sa course (fig. 3), la pike 1 appuie un court instant par toute sa face 5 Sur la face de la piece 2. In the position represented in fig. 1, pike 1 is at a distance from pike 2 and moves in the direction of the arrow to approach pike 2, until it comes into contact with it. The position of parts 1 and 2 at the moment of contact is shown in fig. 2. In this Position, a point 3 of piece 1 touches the contact face of pike 2 at a first point 4. The rectilinear face 5 of piece 1, at the moment of contact, makes with the contact face of pike 2 has an angle of attack less than 45 . Pike 1 continues to move in the direction of the arrow so that point 3 of pike 1 is still in contact with the face of workpiece 2 and scrapes that face. At one point of its travel (fig. 3), pike 1 presses for a short time with its entire face 5 On the face of piece 2.

Le mouvement de la pike 1 se continue Jans 1e sens de la fleche et c'est un point 6 de la piece 1 qui racle la face de la pike 2. 0n a represente ä la fig. 4 la position de la piece 1 au moment .oix elle quitte la pike 2 en un second point 7 de celle-ci. Dans cette position, la face 5<I>de</I> la piece 1 fait avec la face de la pike 2 un angle de feite (i inferieur ä 450. The movement of the pike 1 continues in the first direction of the arrow and it is a point 6 of the part 1 which scrapes the face of the pike 2. 0n has represented in FIG. 4 the position of the piece 1 at the time .oix it leaves the pike 2 in a second point 7 thereof. In this position, face 5<I>of</I> part 1 makes with face of pike 2 a lateral angle (i less than 450.

La piece 1 continue son mouvement dans 1e sens de la fleche et s'eloigne de la piece 2 (fig. 5). Le cycle peut alors recommencer, soit par deplacement de la piece 1 dans 1e meme sens, la pike 1 passant d'abord de la position representee ä la fig. 5 ä celle representee ä la fig. 1 ä distance de la piece 2, soit par deplacement de la pike 1 en sens inverse, 1'an- gle de feite devenant 1'angle d'attaque et vice versa. Piece 1 continues its movement in the direction of the arrow and moves away from piece 2 (fig. 5). The cycle can then start again, either by moving part 1 in the same direction, pike 1 first passing from the position represented in FIG. 5 to that shown in FIG. 1 at a distance from piece 2, or by moving pike 1 in the opposite direction, the angle of feite becoming the angle of attack and vice versa.

L'une au moins des pieces 1 et 2 peut eire mon- tee elastiquement pour assurer un bon contact elec- trique entre ces pikes. At least one of the parts 1 and 2 can be mounted elastically to ensure good electrical contact between these spikes.

Dans 1e contact decrit, 1e contact electrique entre les pikes 1 et 2 se fait constamment sur une sur- face de la pike 2 comprise entre les points 4 et 7 et raclee par 1e frottement de la piece 1, de Sorte que la surface de contact soit toujours propre. L'experience a montre que 1'etincelle entre les pikes 1 et 2, au moment oü elles viennent en contact et au moment oü elles se sdparent, se produit entre la pike 1 et les points 8 et 9 respectivement de la pike 2 situes au- dehors desdits points 4 et 7 de celle-ei, ä condition que les angles d'attaque a et de feite (3 soient infe- rieurs ä 450. En consequence, 1'oxydation de la pike 2 se produit en dehors de la partie en contact avec la pike 1, ce qui ne gene en rien 1e fonctionnement du contact. L'oxydation de la face 5 de la pike 1 en des points 10 et 11 oü 1'etincelle se forme West pas genante non plus, car 1e contact electrique entre les pieces 1 et 2 se fait prineipalement par les points 3 et 6 de la pike 1. En outre 1e frottement de la sur- face 5 Sur la face de contact de la pike 2 tend ä detruire la couche oxydante aux points 10 et 11. In the contact described, the electrical contact between the pikes 1 and 2 is constantly made on a surface of the pike 2 between the points 4 and 7 and scraped by the friction of the part 1, so that the contact surface always be clean. The experiment has shown that the spark between pikes 1 and 2, when they come into contact and when they separate, occurs between pike 1 and points 8 and 9 respectively of pike 2 located at the - outside the said points 4 and 7 of the latter, provided that the angles of attack a and of the angle (3) are less than 450. Consequently, the oxidation of the pike 2 occurs outside the part in contact with pike 1, which in no way interferes with the operation of the contact.The oxidation of face 5 of pike 1 at points 10 and 11 where the spark is formed is not a electrical connection between parts 1 and 2 takes place mainly through points 3 and 6 of pike 1. 11.

Claims

CLAIM Directed spark sliding contact, comprising a first conductive part moving relative to a second conductive pike so as to come into contact with this second pike at a first point thereof, to slide over it and äRTI ID ="0002.0272" WI="6" HE="4" LX="1819" LY="846"> separate from it at a second point, respectively to establish, maintain and break contact, the face of the second piece being thus scraped by the first pike between said points, characterized in that the face of the first piece which approaches the contact face of the second piece forms with this contact face, in the position where the first contact is establishes an angle less than 45°, and in that the face of the first pike which moves away from the contact face of the second piece forms with this contact face, in the position where the contact is breaks, an angle less than 45, so that the electric arcs are established between the two pikes, respectively when the contact is established and when it breaks, at points on the contact face of the second pike located outside the space between said first and second points.