Electrical connectors – With circuit component or comprising connector which fully... – Termination circuit
Reexamination Certificate
2002-01-03
2002-12-10
Paumen, Gary (Department: 2833)
Electrical connectors
With circuit component or comprising connector which fully...
Termination circuit
C439S076100
Reexamination Certificate
active
06491547
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATION
This application claims priority of Taiwan Patent Application No. 90217629, filed on Oct. 16, 2001.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a signal-transmitting apparatus, more particularly to a signal-transmitting apparatus for a cable television system that is provided with an electromagnetic radiation shielding assembly which is space-saving.
2. Description of the Related Art
A conventional signal-transmitting apparatus, such as an amplifier, a distributor, or a diverter, for use in a cable television system requires a power source-connecting tube for receiving a power source terminal so as to connect to an electric power supply for supplying operating power to electronic components in the apparatus. However, when electric currents flow through the apparatus, if no shielding means is provided, the electromagnetic radiation thus generated will interfere with the operation of the electronic components within the apparatus or the input/output ports, thereby adversely affecting the quality of signal transmission.
FIGS. 1 and 2
show a conventional signal-transmitting apparatus with an electromagnetic radiation shielding member which is adapted for use in a conventional cable television system. The apparatus, which is exemplified herein using an amplifier, includes a casing
90
having a metal first partition
91
disposed near a corner of the casing
90
and confining a corner space, a metal top cover
92
disposed on top of the first partition
91
to close the corner space, a metal second partition
93
disposed within the corner space and having a top edge formed with an indentation
931
, and a capacitor
94
disposed in the indentation
931
. The capacitor
94
includes a main body
942
, and opposite outer and inner contact pins
941
,
943
. The outer contact pin
941
is soldered to an inner end of a power source terminal
96
extending through a power source-connecting tube
95
. The main body
942
is mounted in the indentation
931
, and is connected electrically to the top cover
92
so as to constitute a grounding circuit when the top cover
92
is put in place. The inner contact pin
943
is connected electrically to a contact on a circuit board
98
disposed within the corner space via a lead wire
97
.
Although the first and second partitions
91
,
93
and the top cover
92
together can serve to shield the electromagnetic radiation generated by the terminal
96
during operation, the first and second partitions
91
,
93
occupy a relatively large amount of the space available in the casing
90
. Hence, the overall size of the apparatus cannot be reduced. Besides, if the top cover
92
is not in sealing contact with the top edge of the second partition
93
, the electromagnetic radiation from the terminal
96
may still escape through a clearance between the top cover
92
and the second partition
93
.
SUMMARY OF THE INVENTION
Therefore, the main object of the present invention is to provide a signal-transmitting apparatus with an electromagnetic radiation shielding assembly that utilizes a power source-connecting tube of the apparatus to serve as an electromagnetic radiation shielding member to thereby enable a reduction in the size of the apparatus.
Accordingly, a signal-transmitting apparatus for a cable television system of the present invention is adapted to permit insertion of a power source terminal therein and includes:
a body including a metal casing and a circuit board that is fixed in the casing, the casing having a side wall with a capacitor-mounting hole, and a power source-connecting tube which is formed integrally with the side wall at an end thereof and which defines a central hole that is in communication with the capacitor-mounting hole in the side wall;
a conductive terminal clip disposed within the central hole in the power source-connecting tube, the clip having a clamping end that is adapted to clamp the terminal, and a conducting end; and
a capacitor unit disposed in the central hole in the power source-connecting tube and received fittingly within the capacitor-mounting hole in the side wall, the capacitor unit including a capacitor, which has
a main body in electrical connection with the casing,
an outer contact pin in electrical connection with the conducting end of the clip, and
an inner contact pin in electrical connection with the circuit board.
REFERENCES:
patent: 5326280 (1994-07-01), Briones et al.
patent: 5413504 (1995-05-01), Kloecker et al.
patent: 5622524 (1997-04-01), Dirmeyer
patent: 6036545 (2000-03-01), Caviness et al.
patent: 6152743 (2000-11-01), Fox
patent: 6380826 (2002-04-01), Palinkas
Merchant & Gould P.C.
Paumen Gary
Taiwan Cable Connection Corp.
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