Electrical connectors – Coupling part with actuating means urging contact to move... – Contractile receptacle
Patent
1997-05-22
1998-11-10
Abrams, Neil
Electrical connectors
Coupling part with actuating means urging contact to move...
Contractile receptacle
439579, H01R 1315
Patent
active
058334815
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE ART
The present invention relates to a multi-tap distribution apparatus. More particularly, the present invention relates to a multi-tap distribution apparatus which is suitable for use with CATV cables.
BACKGROUND ART
Generally, CATV transmission cables are connected to subscribers via multi-tap distribution apparatuses. CATV stations transmit through the cables not only television signals and control signals but also currents for operating main line amplifiers.
While some distribution apparatuses are not designed for passing currents, there are those designed for this purpose. The later type of distribution apparatuses are provided with a current transmission circuit either installed in the route from a cable connecting portion to taps via a branch circuit and a distribution circuit.
Conventionally, a connector pin provided on one end of the cable is inserted into a terminal, such as one comprising a split tube, in order to connect the cable to the distribution apparatus.
Because the cable connecting portions of the distribution apparatus carry the same maximum currents as the main line does, they must be securely connected to the cable. For the same reason, the cable connecting portions must have a sufficient capacity to minimize the transmission loss. Also, they must be designed not to affect the characteristics of the electromagnetic waves.
While the aforementioned pin-to-split tube type connection is easy to handle, the contact area tends to generates heat when carrying a current of high amperage. It is, therefore, preferable to secure the central conductor of the cable to a cable connecting portion with a screw. Tightening a screw, however, requires a complicated procedure including the steps of, for example, opening the case of the multi-tap distribution apparatus and fitting the central conductor between a pair of holding plates or winding it around a screw. Such a procedure may be dangerous when carried out on an aerial type apparatus in an elevated position.
DISCLOSURE OF THE INVENTION
The present invention provides a distribution apparatus for being interposed in a transmission cable. The distribution apparatus includes a built-in mother board disposed in the approximate center of a case. The mother board includes a branch circuit for distributing as output signals high-frequency signals received at an input terminal of the mother board, a current transmission circuit for allowing currents to be transmitted between the input terminal and an output terminal of the mother board, and the input and output terminals of the mother board being electrically connected to cable connecting portions provided on corners of the case by means of transmission lines. In the apparatus, a pair of grip blocks are positioned in each cable connecting portion. Each pair of grip blocks grips and supports an end portion of a split tube secured to one end of the transmission line with an open end of the split tube directed to one of connector insertion holes formed in the case. Furthermore, one of each pair of blocks are provided with a screw for being tightened in the direction for gripping the split tube. Screw access holes are formed in walls of the case.
According to one aspect of the present invention, at least three cable connecting portions are provided so that two cable connecting portions are selectable from the at least three cable connecting portions for connection to the mother board.
According to another aspect of the present invention, support grooves are formed in the surfaces of the grip blocks that come into contact with the split tube.
According to still another aspect of the present invention, the screw access holes are plugged with blind bolts.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded perspective view of a multi-tap distribution apparatus of an embodiment of the present invention.
FIG. 2 shows a plan view of the components of the multi-tap distribution apparatus.
FIG. 3 shows a circuit diagram of the components of the multi-tap distribution apparatus.
FIGS. 4A an
REFERENCES:
patent: 3951490 (1976-04-01), Devendorf
patent: 4226495 (1980-10-01), Palle et al.
Abrams Neil
Maspro Denkoh Co., LTT
Patel T. C.
LandOfFree
Multi-tap distribution apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-tap distribution apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-tap distribution apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1511052