Electrical connectors – With storage means for flaccid conductor
Patent
1999-09-03
2000-08-29
Paumen, Gary F.
Electrical connectors
With storage means for flaccid conductor
191 124, 242 54R, H01R 1372
Patent
active
061099570
DESCRIPTION:
BRIEF SUMMARY
The invention related to a device for taking up or stowing of a cable comprising several leads, having a take-up drum rotatable about an axis for taking up of the cable, the leads of which are connected to a first connection device, via which an electrically conductive connection is provided to lines of a supply system and which is connected to the take-up drum, and having first electrical contacts which are arranged on circles running coaxially to the drum axis, connected to the leads of the cable, and in that the electrical lines leading to the supply system are connected to a second connection device that has second electrical contacts making an electrically conductive connection with the first electrically conductive contacts when the take-up drum comes to a standstill.
A device of the type mentioned above is known from DE-A-3113444. This known device comprises two pairs of sliding contacts. Each pair of sliding contacts comprises two contact discs, one being flat and the other with an elevation which is spring-pressed against the first contact disc. The pair of sliding contacts are placed on the flange pairs, respectively. One of the two flanges is attached in a stationary position to a hub of a fixed casing, whilst the other flange is attached to the hub of a rotatable take-up drum. Both flanges of each flange pair are at a constant distance from each other.
A take-up drum for an electrical cable is also known which can be pulled out by hand and rolled up on the drum by means of an electric motor-driven power supply. The take-up drum has a ring-shaped wall placed inside the drum on the motor casing. The wall has three sliding rings which are embedded in the wall, concentrically to the swivel axis of the motor. A contact block has three sliding contacts which are pressed in a sliding manner against one of the sliding rings, respectively (WO-A-8607209).
Other devices for housing or storing a cable comprising several leads can be found in EP-B-0532 212 or EP-B-0163025 for example. In the first named stowing device, the cable is wound in one layer onto a hollow-cylinder carrier element, which in turn is rotatable about an axis, e.g. a gear motor, coinciding with the central axis of the element. Inside the take-up drum is an equalizing cable allowing a link-up to a permanent connection of the supply system. The equalizing cable is here more or less twisted. The strain normally imposed on the supply cable is reduced by splitting it inside the rotary element into two sections of preferably equal length, thereby splitting the twisting effect. In the stowing device according to EP-B-0 163 026 B1, the take-up roller comprises two drum disks between which is the connection cable in the wound-on state. The distance between the two drum disks is matched to the diameter of the connection cable such that the wound-on layers are on one plane next to one another. The take-up drum itself, which can be preferably disposed underneath an airport gangway, has a vertically aligned rotary axis. The link-up between the connection cable and a permanent connection in the form of an equalizing cable runs in a spiral form inside a dome-like housing section, with the leads being exposed to prevent their breaking. The leads form a kind of "whisk" which--depending on the wound or unwound state of the connection cable--is spirally rotated to a greater or lesser degree and at the same time twisted.
The problem underlying the present invention is to develop a device of the type mentioned so that no electrically conductive connection is given between the electric contacts of the first connection device and the electric contacts of the second connection device during take-up drum rotation whilst the cable is being pulled out or rolled up.
The problem is solved in accordance with the invention using the above device in that the second electrical connection device runs at a distance to the first electrical connection device when the take-up drum is rotating and moved axially along the drum axis, and the first and second electrical contact
Nguyen Phuongchi
Paumen Gary F.
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