Electrical transmission or interconnection systems – Conductor arrangements or structure
Patent
1987-07-15
1989-03-07
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Conductor arrangements or structure
363107, 363126, 439 86, 439592, 174 731, 174 77R, 307149, H02G 1500
Patent
active
048108995
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a high-voltage connection device, especially for a high-voltage transformer without high-voltage lead-out cables and with a detachable potentiometer set.
2. Description of the Prior Art
A high-voltage (HV) connection, such as an automobile spark plug, is generally made with at least one connecting lug crimped on to the connection wire. The connecting lug may be a female lug that caps a terminal or male lug, or it may be a male lug inserted into a cup point or a female lug. A connection of this type therefore requires the crimping of a connecting lug on the connecting wire, and this operation calls for special equipment.
In general, a high-voltage transformer designed to power colour cathode tubes comprises a built-in potentiometer set which delivers the voltages of the pre-focusing and screen grids, G3 and G2 respectively, of these tubes. However, the high-voltage cable and lead-out cables of the grids G2 and G3 are fixed and form one piece with the transformer. These cables, the length of which varies with the user, create problems in the manufacturing, handling and assembly of transformers. Furthermore, the potentiometer set built into the transformer requires internal cabling operations which may impair the dependability of the product.
SUMMARY OF THE INVENTION
The object of the present invention is an HV connection device which can be easily and quickly used and requires no special equipment.
Another object of the present invention is a connection device for a high-voltage transformer in which the lead-out cables, such as the connection cable to the potentiometer set and the high-voltage cable, are detachable and set up a reliable connection which is as simple as possible.
SUMMARY OF THE INVENTION
The high-voltage connection according to the invention comprises a sleeve made of a preferably rigid insulating material. On the sleeve there is fixed a conductive pad into which elongated bodies (such as the cores of conducting wire) can easily penetrate. The conductive pad advantageously is composed of a silicone charged with electrically conducting powder.
The high-voltage transformer of the invention comprises detachable connection means to connect it to high-voltage lead-out cables. These means comprise, for each lead-out of the transformer, a device for the quick hooking of the cable and a device providing contact with the conductor or core of the cable. According to a preferred embodiment of the invention, the quick hooking device is a clip-on device comprising a first part which forms one piece with a duct which is integrally moulded with the sheath that covers the coating insulant of the transformer coil. The internal diameter of the duct is substantially equal to the external diameter of the cable, and the base of the duct is located above or near the corresponding outlet terminal or socket. The terminal or socket is connected to a conductive pad, preferably made of silicone charged with conductive material, which tightly sealing the base of the duct. The second part of the clip-on device is fixed to the cable near its end, and it is positioned in such a way that the end of the conductor or core of the cable is in good contact with the pad when the end of the cable penetrates into the duct and when the two parts of the quick hooking device are engaged with each other.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be better understood from the following detailed description of several embodiments taken as non-exhaustive examples and illustrated with reference to the appended drawings.
FIG. 1 is a partial cross-section view of a high-voltage transformer with two lead-out cables.
FIG. 2 is a highly simplified view from the top of a potentiometer set set on a printed circuit which is distinct from the transformer, this unit being connected to a transformer such as the one shown in FIG. 1.
FIG. 3 is a very simplified front view of a high-voltage transformer according to the invention, showing s
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Navy Technical Disclosure Bulletin, vol. 8, No. 3, Mar. 1983, (Washington, US), M. Hutchenreuther: "Improved Shorting Plug", pp. 89-92, Voir p. 91, lignes 21-26; FIGS. 1,2.
Ip Paul
Orega Electronique et Mecanique
Shoop Jr. William M.
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