Electricity: circuit makers and breakers – Multiple circuit control – Automatic multiple contact selective means
Patent
1998-01-28
1999-08-17
Gellner, Michael L.
Electricity: circuit makers and breakers
Multiple circuit control
Automatic multiple contact selective means
335118, H01H 116
Patent
active
059396890
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a matrix-related jumpering arrangement.
More particularly, there is proposed in accordance with the invention a matrix crosspoint switching device or jumpering device which has a plurality of selected crosspoints between rows and columns of contact devices where each contact device includes at least one movable contact element, normally in the form of a movable contact spring that can be moved towards and away from a fixed contact element by means of a movable actuating element.
The movable contact spring and the fixed contact element related thereto are included in an electric circuit, via conductors, which is either closed or broken according to the positional setting of the movable contact spring.
The crosspoint switching device includes a plurality of elements which are allotted to respective movable contacts and which make or break said contacts, wherein said elements are actuated with the aid of a row of reciprocatingly movable first rods and a column of reciprocatingly movable second rods.
According to the invention, the actuating elements are comprised of electrically insulating balls disposed at selected crosspoints between rows and columns, wherein respective balls are allotted a chosen crosspoint and are actuable by and movable in response to movement from one or both of the crosspoint-related rods.
It will be understood from this that each crosspoint-related ball can be moved between different positions in response to movement of a row-related rod in the crosspoint and in response to movement of a column-related rod in the crosspoint, where movement towards and into a first position creates conditions for said ball to move a contact-related contact element in a first direction,- while movement towards and into a second position creates conditions whereby the ball causes the aforesaid contact-related contact element to move in a second direction.
DESCRIPTION OF THE BACKGROUND ART
Several different designs of matrix crosspoint switching devices of the kind defined in the introduction are known to the art and adapted for different applications.
With regard to the constructive design of these switching devices, it may be appropriate to divide the same into different categories.
A first category utilizes a contact device which includes electrically conductive balls placed in selected crosspoints between first and second rods arranged in rows and columns, where electrically conductive balls associated with respective rods can be moved to a position in which the ball (as a movable contact element) is able to make an electric circuit terminating in two fixed contacts, or to a position in which the ball breaks the circuit.
The following publications are recited as examples of prior art disclosures in this regard:
This publication describes and illustrates a matrix crosspoint switching device which makes, breaks or switches contacts between a plurality of first conducting pairs and a plurality of second conducting pairs.
The device includes a connection block that has a plurality of cavities (H1) containing crosspoints of the pluralities of conductor pairs, said cavities (H1) accommodating a first ball 1 (electrically conductive) and a second ball 2 (electrically insulating).
The ball (1) rests against two metal tongues (51, 52) which extend into the cavity in the x-direction from a y-conductor (5) moulded in the block (K).
A leaf-spring (61) extends in the z-direction from an x-conductor (6), which as the y-conductor (5) is moulded in the block (K).
The electrically conductive ball (1) makes contact with an outwardly bent tongue (61a) of the leaf spring.
The balls (1-4) are positioned In the cavity (H1) such as to provide electric contact between incoming conductor pairs (9, 6) in the x-direction and outgoing conductor pairs in the y-direction.
This publication describes and illustrates a switching device for electrically making or breaking an electric circuit allocated a selected crosspoint from among a plurality of available crosspoints in a
REFERENCES:
patent: 584965 (1897-02-01), Leibundgut
patent: 2647166 (1953-07-01), Lens
patent: 3614330 (1971-10-01), Chauveneaud
patent: 3662301 (1972-05-01), Willis
patent: 4954674 (1990-09-01), Roos
patent: 5214400 (1993-05-01), Roos
Gellner Michael L.
Lum Lee S.
Telefonaktiebolaget LM Ericsson
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