Raymond F Clark

US Patent:

45568537, Dec 3, 1985

Filed:

Sep 28, 1984

Appl. No.:

6/655529

Inventors:

Raymond N. Clark - Cherry Hill NJ

Assignee:

RCA Corporation - Princeton NJ

International Classification:

H01P 5103

US Classification:

333 26

Abstract:

A coax-fed slotted-cylinder (pylon) antenna for UHF television operation at power of 200 kW and above has a coaxial feed which is large enough to propagate higher TE. sub. 11 mode as well as the desired fundamental TEM mode. The power fed to each slot and as a consequence the antenna array factor may be perturbed by the higher modes. It is important to reduce losses in the feed of the high-power signals from the transmitter or high power amplifier up the tower to the antenna. For lowest loss, a waveguide is used for the run up the tower. A waveguide-to-coax transition is used for adapting the waveguide to the coaxial antenna feed while suppressing the undesired TE. sub. 1,1 mode. The transition has two short semicircular waveguides opening into the waveguide feed from the transmitter. The semicircular walls of the two waveguides are coupled to the outer conductor of the coax antenna feed. The semicircular waveguides have a common flat wall, the center of one core of which is coupled to the center-conductor of the coax antenna feed.

US Patent:

59080310, Jun 1, 1999

Filed:

Oct 31, 1997

Appl. No.:

8/962002

Inventors:

Raymond M. Clark - Glendale AZ
Gerald J. Hulsebus - Glendale AZ

International Classification:

A24F 114
A24F 130

US Classification:

131173

Abstract:

A tobacco water pipe for smoking loose leaf tobacco, the tobacco water pipe having a base and an elongated tube, the elongated tube being removably interlocked to the base of the tobacco water pipe. To removably interlock the base and the elongated tube, the base of the water pipe has a seat member which is at least partially embedded into the base of the tobacco water pipe and the elongated tube has a sleeve member which is affixed to the lower most portion of the elongated tube. The seat member of the base is configured to receive the sleeve member of the elongated tube. The sleeve member alone, or in connection with a collar member, is designed to interlock with the seat member, securely fastening the elongated tube to the base of the tobacco water pipe.

US Patent:

D3723356, Jul 30, 1996

Filed:

Apr 20, 1995

Appl. No.:

D/037798

Inventors:

Raymond M. Clark - Glendale AZ

US Classification:

D27162

US Patent:

46022279, Jul 22, 1986

Filed:

Jul 30, 1984

Appl. No.:

6/635926

Inventors:

Raymond N. Clark - Cherry Hill NJ
Anthony N. Schmitz - Mt. Laurel Township, Burlington County NJ

Assignee:

RCA Corporation - Princeton NJ

International Classification:

H01P 516
H03H 748

US Classification:

333109

Abstract:

A television broadcast transmitter includes two power amplifiers or transmitters, a dummy load and an antenna. A noncontacting switching arrangement includes directional couplers or hybrids operated as controllable phase-shifters under the control of pairs of variable reactive terminations. Signals arriving at the antenna or load port by two paths combine in-phase to couple signal to that port, or combine out-of-phase to cancel signal. If the out-of-phase condition is inaccurate, cancellation may be incomplete, resulting in crosstalk. To avoid the need for accurate positioners to position the variable reactive termination at the position providing the desired phase-shift, a particular structure of the reactive termination is used. The reactive termination is a short-circuited coaxial line with an axial gap in the center conductor at a position less than one quarter operating frequency wavelength from the short circuit. The center conductor is hollow around the gap and lined with insulating material, and an elongated conductive slug is actuated to selectively occupy one or two positions within the center conductor, one position remote from the gap whereby a minimum series capacitance results, and the second position straddling the gap, whereby the series capacitance increases.