EP1149179A1

EP1149179A1 - A metal alloy for electrical connections with nul contact tension

Info

Publication number: EP1149179A1
Application number: EP00911266A
Authority: EP
Inventors: Paolo Agostinelli
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-10-25
Filing date: 2000-03-20
Publication date: 2001-10-31
Also published as: JP2003512534A; IT1306731B1; ITRM990651A1; ITRM990651A0; WO2001031074A1

Abstract

A metal alloy for realizing electrical connections with pratically nul contact tension, comprising the following components, possibly alternative, with the relative percentages: tin 45-95 %, antimony 1-20 %, copper 1-20 %, lead 0-50 %, silver 0-20 %, gold 0-10 %, rhodium 0-15 %, palladium 0-10 %, beryllium 0-20 %.

Description

"A METAL ALLOY FOR ELECTRICAL CONNECTIONS WITH NUL CONTACT TENSION"

The present invention concerns a new metal alloy for realizing electrical contacts with a practically nul contact tension.

It is well known that pure metals, like copper and silver, are excellent electric conductors and are not very expensive.

The transmission of small and variable electric signals, like e.g. audio signals, proves - by way of experiment - to be a phenomenon quite more complicated than it was known to science, because there are penomena which can be heard by the listener but that may not be taken by any instrument, like tone- colours, the effect of space and the roughness.

Infact, it has been noted that the distortion at audio high frequencies or the 'furred' sound in audio medium frequency, both caused by the copper used in the cables, can be heard, and the silver cables makes it perceive immediately.

Therefore, it is necessary to eliminate above mentioned inconveniences shown by pure metals, all the more so as even the use of silver only determines a very clean sound, not distorted but somewhat faint and quite too metallic. A plurality of metals disposed in series or in parallel may produce satisfactory results, obtaining the compensation of the different tone-colours; but this result has prooved to be expensive due to the indispensable need of goid, and difficult to working.

At present, even filters or compensation nets are used and, in general, the makers try to compensate the different tone-colours or distortions produced by the component metals and by the metals in the cables with excellent results, even if they are still compensations.

The pheomenon of the distortion of the small electric signals may be explained with the contact tensions that arise in the welding points or in the contact points between the different metals.

No metal is free from such phenomenon.

As said distortion is caused by discontinuity or by a tension step, that is the limit to the resolution of the small entity electric signals, the need of the elimination thereof, so as to obtain a greater resolution, appears evident.

Above described aim may also be reached by using metal alloys: infact, it is known that an alloy looses the features of its components for assuming a typical structure: bronze, e.g., has its own molecular structure and its typical sonority absolutely different from the one of its components. The ailoy according to the present invention approaches as much as possible a nui contact tension, it may be welded by means of the known procedures used for tin -lead welding, it does not break, it has a considerable malleability, it does not oxidize very easily and consists of the following metals in the reiaπve percentages

antimony 1 -20% copper 1 -20% lead 0-50% silver 0-20% gold 0-10% rhodium 0-15% palladium 0-10% beryllium 0-20%

Each additive changes the sonority of the cable obtained with the aiiow m a range of different harmonies, according to the needs

The tests done with the wires obtained with above described aiioy have shown that the resolution increases considerably as - in the field of audio and video, e g - the parameters connected thereto aiso increase surrounding, micro-contrast, colour

In an embodiment, an aiioy according to the present invention, with a reduced number of components but extremely efficient for what concerns the acoustic result, may consist of. tin 95% antimony 4% copper 1% total, 100%

Claims

1. A metal alloy for realizing electrical connections with practically nui contact tension, characterized in the components with the relative percentages.

tin 45-95% antimony 1 -20% copper 1 -20% lead 0-50% silver 0-20% gold 0-10% rhodium 0-15% palladium 0-10% beryllium 0-20%

2. A metal alloy according to claim 1, characterized in the presence of:

tin 95% antimony 4% copper 1% total, 100%