New Patents VII

4965851

R E C E I V I N G A R R A N G E M E N T W I T H A R E C E P T I O N C A R R I E R

F R E Q U E N C Y A L T E R N A T E L Y C H A N G E D F R O M O N E T O

A N O T H E R

Shunichir Tejima, Tokyo, Japan assigned to NEC Corporation

In a satellite communication system for carrying out communication between a central station and local stations, each local station includes a receiving apparatus (41) which comprises a con- verting unit (43) for converting a received radio signal of a received carrier frequency into a con- verted signal by using a reception carrier signal of a reception carrier frequency and a demodulating unit (44)for demodulating the converted signal into a demodulated signal. Connected to the demodulating unit, a deciding unit (45) decides whether the demodulated signal is normal or abnormal. The deciding unit pro- duces an abnormal signal when the demodulated signal is abnormal. After reception of the ab- normal signal, a timer circuit (47) measures a lapsed time to produce a time up signal when the lapsed time is equal to an integral multiple of a predetermined time interval. Responsive to the time up signal, a supplying .section (49) alter- nately supplies first and second carrier signals in- dicative of first and second memorized frequency signal preliminarily memorized in a memorizing section (48), respectively, one at a time as the reception carrier signal to the con- verting unit.

4965854

N O I S E B L A N K E R W I T H C O N T I N U O U S W A V E

I N T E R F E R E N C E C O M P E N S A T I O N

Ellis Glazebrook assigned to General Electric Company

A noise blanker is disclosed which blanks out impulse noise emanating from the alternator, ignition systems of rotor vehicles, and other sources. This is accomplished by delaying an in- put IF signal while generating a blanking gate pulse occurring at the same time as the noise pulses. These blanking pulseg are then used in turn offthe delayed IF signal precisely where the noise occurs, resulting in noise-free audio recep- tion. The noise blanker operates to detect noise

pulses by detecting the leading edge of any nar- row pulse which is received at the front end of the receiver and is reflected in the IF input signal. At the same time, by virtue of the operation of an AGC amplifier the noise blanker's vulnerability to interference or capture by continuous-wave signals is reduced.

4965855

A U T O M O B I L E S H A P E D M I N I A T U R E R A D I O S E T

Shintaro Tsuji, Tokyo, Japan assigned to Sanrio Company Ltd

A model device that looks like a racing car. There are front and rear axles and wheels thereon, a central portion, between the front and rear axles, a hinged nose-like front portion ex- tending forward of the front axle that can be swung open to disclose a cavity, and a rear.por- tion forward of the rear wheels. A radio set is in said central portion and has an on-off and volume control dial on one side and a tuning dial on the other side. The dials are on an upper por- tion of the central portion thereof. The central portion also has a bottom cover with a detachable portion leading into a bottom cavity. There is a reading light inside the cavity of the nose-like portion and pivotally attached to the nose-like portion. A rearmost portion is detachably secured to the rear portion. There is a digital clock in the rearmost portion which has a hinged cover thereon normally covering the digital clock but able to be swung open. The rear portion also has a cover portion hinged at a for- ward point thereof that can be swung open to reveal a rear cavity. There is also a detachable antenna rod extending vertically up from the central portion even with part of the rear por- tion.

4965856

S E C U R E O P T I C A L - F I B E R C O M M U N I C A T I O N S Y S T E M

Anthony Swanic assigned to Arbus Inc

A data signal and a reference signal are multi- plexed into a fiber optic communications link for transmission from a first secure location to a seond location. A replica of the reference signal is transmitted from the first location to the second location over a separate communication channel. At the second location, the angular