GEORGE M KAUFFMAN
Engineering in Hudson, MA

6754060, Jun 22, 2004

Jun 15, 2001

09/882271

George M. Kauffman - Hudson MA 01749

H01C 712

361119, 361117, 361120

A protective device for an RF cable comprises in one embodiment an outer conductor having a main body section, a first connector and a second connector. The main body section has a cylindrically shaped inner sidewall and includes a first end and a second end. The first connector extends out from the first end of the main body section. The second connector extends out from the second end of the main body section. An inner conductor is axially disposed within the outer conductor and extends through the main body section into the first and second connector interface. Insulators are provided for mechanically supporting and electrically insulating the inner conductor from the outer conductor. A gas discharge tube (GDT) is disposed inside the main body section between the cylindrically shaped inner sidewall and the inner conductor. A spring of electrically conductive material is disposed inside the main body section between the GDT and the main body section in contact with the cylindrically shaped sidewall and the GDT and is under compression.

2012000, Jan 5, 2012

Jul 1, 2011

13/135331

George M. Kauffman - Hudson MA, US

H02G 15/08

174 88 C

An RF transmission line device with high performance, wide band characteristics includes an inner conductor for transmitting communication signals of a desired frequency band and a grounded outer conductor electrically insulated from the inner conductor by at least one dielectric material. A tap conductor is connected to the inner conductor and serves as an auxiliary path through which signals outside the desired frequency band can be externally injected into and/or retrieved from the through RF path, the tap conductor extending longitudinally through a tap housing conductively coupled to the outer conductor. As a feature of the invention, a modular attachment is removably coupled to the tap housing and includes a plurality of voltage suppression components that are arranged in the conductive path between the tap conductor and the tap housing, the voltage suppression components discharging transient voltages diverted from the inner conductor by the tap conductor.

8228656, Jul 24, 2012

Sep 12, 2008

12/283523

George M. Kauffman - Hudson MA, US

H02H 9/04

361118

A device for protecting a radio frequency transmission line from transient voltages includes an inner conductor for transmitting electromagnetic signals of a desired frequency band and a grounded, coaxial outer conductor electrically insulated from the inner conductor. A conductive bus bar extends longitudinally within the outer conductor and is conductively connected thereto. A plurality of gas discharge tubes are directly mounted on the inner conductor along at least a portion of its length in spaced apart intervals. In addition, each of the plurality of gas discharge tubes is conductively connected to a flattened surface on the bus bar through a metal spring washer. In use, the plurality of gas discharge tubes operate in parallel with one another to discharge transient voltages carried by the inner conductor that exceed a predefined threshold.

7234956, Jun 26, 2007

Feb 21, 2006

11/358741

George M. Kauffman - Hudson MA, US

H01R 13/627

439349, 439322

An electrical connector includes an inner conductor, an annular insulator which surrounds the inner conductor and an outer conductor which surrounds the annular insulator. The electrical connector is provided with both a threaded coupling mechanism and a snap-fastening coupling mechanism. In one embodiment, the threaded coupling mechanism is in the form of an outwardly projecting spiral threading which protrudes out from the mating end of the outer conductor. In the same embodiment, the snap-fastening coupling mechanism is in the form of an annular groove which is formed in the central body of the outer conductor, the annular groove being sized and shaped to receive a resilient, C-shaped snap ring from a mating electrical connector. In this manner, it is to be understood that the electrical connector is capable of being mechanically and electrically coupled to various types of mating electrical connectors using either threaded coupling means or snap-fastening coupling means.

7396249, Jul 8, 2008

Jun 15, 2007

11/818918

George M. Kauffman - Hudson MA, US

H01R 13/625

439349, 439322, 439345

An electrical connector includes an inner conductor, an annular insulator which surrounds the inner conductor and an outer conductor which surrounds the annular insulator. The electrical connector is provided with both a threaded coupling mechanism and a snap-fastening coupling mechanism. In one embodiment, the threaded coupling mechanism is in the form of an outwardly projecting spiral threading which protrudes out from the mating end of the outer conductor. In the same embodiment, the snap-fastening coupling mechanism is in the form of an annular groove which is formed in the central body of the outer conductor, the annular groove being sized and shaped to receive a resilient, C-shaped snap ring from a mating electrical connector. In this manner, it is to be understood that the electrical connector is capable of being mechanically and electrically coupled to various types of mating electrical connectors using either threaded coupling means or snap-fastening coupling means.

5191227, Mar 2, 1993

Jun 29, 1990

7/545554

Alfred E. Deluca - Harvard MA
George M. Kauffman - Hudson MA

Digital Equipment Corporation - Maynard MA

H01H 3500

307 38

An apparatus for controlling a plurality of electrical devices, each of the electrical devices including circuitry for switching the electrical device to a standby mode or an operational mode. A main control unit and a secondary control unit is provided in each of the electrical devices. When a main control unit of one electrical device is connected to a secondary control unit of a second electrical device, control of the operational state of the second electrical device is transferred to the remotely located first electrical device. When the two electrical devices are disconnected, local control of the second electrical device is maintained.

5189592, Feb 23, 1993

Dec 23, 1991

7/811636

George M. Kauffman - Hudson MA

H01G 400, H03H 958

361301

An electrical filter including a first electrode; a second electrode; a dielectric means connected between the first electrode and the second electrode; and a resilient coupling providing an electrical connection between the dielectric means and each of the first and second electrodes and permitting relative motion therebetween. The resilient coupling prevents fracture of the dielectric means.

7440253, Oct 21, 2008

Dec 2, 2003

10/727076

George M. Kauffman - Hudson MA, US

H01C 7/12

361119, 361 56

A protective device for transmitting electromagnetic signals of a desired frequency band from a source to a load comprises an outer conductor, an inner conductor extending coaxially within the outer conductor and a quarter wavelength shunt conductor. A radio frequency impedance control (RFIC) tube is used to maintain the proper transmission line impedance for the device. The shunt conductor is connected, at one end, to the inner conductor and extends along a multi-curved path through an opening in the RFIC tube and wraps around the RFIC tube in at least one plane. The other end of the stub is connected to the outer conductor either directly or indirectly by means of distributed capacitance through a dielectric insulator. A plurality of gas discharge tubes may be coupled to the shunt conductor to shunt undesired voltages. In use, the inner conductor serves as the transmission line, the outer conductor serves as the return path and the quarter wavelength shunt conductor serves as an inductor for filtering out electromagnetic energy which falls outside the desired frequency band.

8488290, Jul 16, 2013

May 13, 2009

12/454178

George M. Kauffman - Hudson MA, US

H01C 7/12, H02H 1/00, H02H 1/04, H02H 3/22, H02H 9/06

361119, 361111

A device for protecting a radio frequency transmission line from transient voltages includes an inner conductor for transmitting communication signals of a desired frequency band and a grounded, coaxial outer conductor electrically insulated from the inner conductor by a pair of annular insulators. As one feature of the invention, a tap conductor for discharging transient voltages carried by the inner conductor that fall outside the desired frequency band is coupled at one end to the inner conductor through a press-fit connection. As another feature of the invention, a pair of high-quality contacts are mounted onto opposite ends of the outer conductor and serve, together with the inner conductor, as the only electrical contact surfaces for the protective device that transmit the desired communication signals. As another feature of the invention, each insulator has a constant outer diameter along the entirety of its length and a variable inner diameter.

7564669, Jul 21, 2009

Oct 16, 2007

11/974720

George M. Kauffman - Hudson MA, US

H02H 1/04, H02H 1/00

361120

A protective device for transmitting electromagnetic signals of a desired frequency band from a source to a load comprises an outer conductor, an inner conductor extending coaxially within the outer conductor and a quarter wavelength shunt conductor. The shunt conductor is connected, at one end, to the inner conductor and is connected, at its other end, to the outer conductor by means of distributed capacitance through a dielectric insulator. A plurality of gas discharge tubes are connected at one end to the shunt conductor and at the other end to the outer conductor. In use, the inner conductor serves as the transmission line, the outer conductor serves as the return path and the quarter wavelength shunt conductor serves as an inductor for filtering out electromagnetic energy which falls outside the desired frequency band, the plurality of gas discharge tubes operating electrically in parallel with one another to discharge shunted voltages.