Metal founding – Including means to directly apply magnetic force to work or... – By electromagnetic means
Patent
1996-02-07
1998-04-28
Hail, III, Joseph J.
Metal founding
Including means to directly apply magnetic force to work or...
By electromagnetic means
164468, 439310, B22D 2702, H01R 1362
Patent
active
057433240
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCE TO RELATED APPLICATION
This application is a 371 of PCT/FR95/00749 filed Jun. 8, 1995.
BACKGROUND OF THE INVENTION
The present invention relates to making a disconnectable electrical connection between two portions of the same installation. The invention is applicable to the case where one of the portions to be connected, which is typically a stationary portion but which may present a certain degree of mobility and which is referred to below as the "moving assembly" performs, during operation of the installation, limited displacements relative to the other portion which is typically stationary but which may present a certain amount of mobility and which is referred to below as the "stationary assembly" or as the "upstream assembly". Such displacements are typically reciprocating and are referred to below as "functional displacements". Under such circumstances, electrical connection is established before each period of operation and it must be maintained during said period in spite of functional displacements. For example, it may enable the moving assembly to be powered electrically from the stationary assembly.
Disconnectable electrical connection of a moving assembly to a stationary assembly may be implemented by co-operation between two complementary connection blocks, one constituted by male connector halves and the other by female connector halves. In general, two such connector blocks respectively connected in permanent manner to the stationary assembly and to the moving assembly are respectively referred to below as an "upstream block" and as a "downstream block".
A first known connection system is in common use. In that system, the downstream block is stationary while the installation is in operation, and it is connected to electrical terminals of the moving assembly by conductors that are flexible or at least deformable, with deformation thereof allowing functional displacements to take place. This can be summed up by specifying that the downstream block is connected by conductors possessing functional deformation.
At the upstream block, both ends of each conductor which provide permanent connection to the terminals of a stationary assembly are fixed relative to each other in such a manner that the conductors, if not rigid, are at least free from deformation that is imposed by the functional displacements. This can be summed up by saying that the upstream block is connected by conductors without functional deformation.
In certain situations that occur in manufacturing industry, the moving assembly must be capable of being disconnected and taken away between two periods of operation, e.g. to be replaced by an equivalent, new assembly, or to be reinstalled after maintenance operations such as repair or renovation. The amplitude of the displacements necessary for such replacement or maintenance operations is much greater than that of functional displacements.
These displacements are referred to below as being "extrafunctional".
In such a case, it is usual for the downstream block to accompany the moving assembly in its extrafunctional displacements. This avoids any intervention on the electrical network of said assembly. However, if these displacements are performed by taking hold of said assembly and transporting it, the corresponding displacements of the downstream block carried by the flexible conductors present drawbacks when transport operations need to be performed quickly. In addition, after return and installation of a moving assembly that is new or renovated in order to continue operation of the installation, human intervention is required to put the downstream block into position so that it co-operates with the upstream block. That is expensive if the blocks are situated in a zone that is difficult to access, if there is not enough room, and/or if the conditions that obtain in said zone are inhospitable, e.g. if the temperature is high.
Document (U.S. Pat. No. 4,508,404--Frawley) describes a second known connection system. That system is designed for establishing a tempor
REFERENCES:
patent: 4468858 (1984-09-01), Gulberg et al.
patent: 4508404 (1985-04-01), Frawley
patent: 4834168 (1989-05-01), Nore et al.
Kouyoumdjian Michel
Kunstreich Siebo
Takata Minoru
Hail III Joseph J.
Lin I.-H.
Rotelec
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