Electrical connectors – Including or for use with coaxial cable
Reexamination Certificate
1999-11-30
2001-07-24
Luebke, Renee (Department: 2833)
Electrical connectors
Including or for use with coaxial cable
Reexamination Certificate
active
06264503
ABSTRACT:
TECHNICAL FIELD
This invention relates to a new rugged cable connector means for connecting transmission line cables to antennas and, in particular, to a unitary connector means which can be inexpensively manufactured, and yet reduce radio frequency losses through the connections.
BACKGROUND OF THE INVENTION
In the industry of radio frequency equipment, antennas are connected to transmission line cables by connectors known as SO-239 and PL-259 screw machine connectors. These screw machine connectors are expensive to produce and are difficult to assemble. Additionally, the interconnecting male - female components are subject to radio frequency losses due to corrosion in harsh environments. One early type of transmission line connection described in the Blonder U.S. Pat. No. 3,001,169 patent was comprised of many small components which had to be individually assembled and which increased the points of contact at which corrosion or radio frequency disturbances could occur. Another attempt to prevent corrosion includes the Emery U.S. Pat. No. 5,580,277, which is an earlier invention by the present inventor, which describes embedding a contact plate in a plastic body to seal the cable connections to the contact plate and a machine screw which also isolates the contact plate from the atmosphere when attached to an antenna.
SUMMARY OF THE INVENTION
The present invention generally comprises a coaxial cable connector comprising a plurality of components. An internally threaded shell body receives a plastic stepped washer inserted through one end of the shell body. The plastic stepped washer matingly engages a distal end of the threaded shell body. An extended externally threaded member having a coaxial opening is positioned in the threaded shell body. A first end of the extended threaded member passes through an opening in the plastic stepped washer and matingly engages the stepped washer. The extended threaded member does not come into contact with the threaded shell body. An insulating flat washer which conforms to the interior diameter of the threaded opening of the shell body is positioned adjacent a second end of the extended threaded member. The flat washer acts as an insulator and as a mechanical seal. The flat washer defines an axial opening extending therethrough.
A tubular threaded conductor body having an axially extending opening is positioned in the threaded body. The opening of the tubular threaded body is internally threaded and has a first end which receives an internal washer. The tubular threaded body has at least one, and preferably a plurality of, radially extending soldering windows coaxially positioned in the shell body. It is to be understood that the soldering of any coaxial cable wire extending through the tubular threaded conductor body is accomplished prior to the coaxial insertion of the tubular threaded conductor body into the opening defined in the threaded shell body. At least an internal wire of the coaxial cable extends through the coaxial openings in the internal washer of the tubular threaded conductor body, the flat washer, the threaded shell body, the stepped washer and the extended threaded member.
A tubular threaded strain relief member is coaxially positioned on the coaxial cable prior to the coaxial cable being inserted through the coaxial cable connector. The tubular threaded strain relief member can be threaded to the tubular threaded conductor body to provide both compression and connection of the outer wires of the coaxial cable to the tubular threaded body.
One object of the present invention is to produce a coaxial cable connector which is not susceptible to corrosion damage due to incomplete or leaky seals between the components of the connector.
Another object of this invention is to reduce the number of component parts by producing a single unitary connector, thereby reducing manufacturing costs and reducing the assembly time. Additionally, another object of this invention is to reduce radio frequency losses that typically occur between components of a cable connector by producing a unitary connector.
REFERENCES:
patent: 3001169 (1961-09-01), Blonder
patent: 4097867 (1978-06-01), Eroncig
patent: 4101898 (1978-07-01), Ingram
patent: 4137534 (1979-01-01), Goodnight
patent: 4163981 (1979-08-01), Wilson
patent: 4214247 (1980-07-01), Richmond
patent: 4231629 (1980-11-01), Kirby
patent: 4379298 (1983-04-01), Vincent et al.
patent: 5451968 (1995-09-01), Emery
patent: 5580277 (1996-12-01), Emery
patent: 6095858 (2000-08-01), Emery
Emch, Schaffer, Schaub & Porcello & Co., L.P.A.
Hammond Briggitte R.
Luebke Renee
Procom Manufacturing Co., Inc.
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