Communication system signaling circuit
FIG. 1 represents an illustrative telephone switching system incorporating signaling circuits in accordance with the invention. The switching system comprises a processor 101, a switching network 102... Read More
Inventors: Mussman, Harry E.;, Assignee: Bell Telephone Laboratories, Incorporated (Murray Hill, NJ) |
Line powered flasher circuit for ringing signal
Turning to the drawing figures, the preferred embodiment of the present invention will now be described. Turning first to FIG. 1, the flash repetition rate, as a function of on/off duty cycle for the... Read More
Inventors: Alderman, Robert J.;, Assignee: |
Transistorized D-C/A-C converter
We claim: 1. A d-c/a-c converter comprising: a transformer having a secondary winding connected across a load and a primary winding divided into two symmetrical halves; a pair of transistors each havi... Read More
Inventors: Lupatin, Elio; Rizzi, Luigi;, Assignee: Societa Italiana Telecomunicazioni Siemens S.p.A. (Milan, IT) |
High speed digital programmable frequency divider
The need in the art for a high speed digital programmable frequency divider capable of frequency division by even and odd integers is addressed by the high speed digital programmable frequency divider... Read More
Inventors: Larson, Lawrence E.;, Assignee: |
Line switching apparatus
Accordingly, it is a general object of the present invention to provide a novel and useful line switching apparatus in which the problems described above are eliminated. Another and more specific obje... Read More
Inventors: Nashimoto, Chuzo;, Assignee: Ricoh Company, Ltd. (Tokyo, JP) |
Electronic clinical thermometer, and method of measuring body temperature
Accordingly, an object of the present invention is to provide an electronic clinical thermometer, and a method of measuring body temperature, for predicting a final, stable temperature with great accu... Read More
Inventors: Ishizaka, Hideo; Fujii, Tadashi;, Assignee: Terumo Corporation (Tokyo, JP) |
Electronic clinical thermometer
An object of the present invention is to provide an electronic clinical thermometer in which the displayed value of temperature rises smoothly immediately after the thermometer makes contact with the ... Read More
Inventors: Muramoto, Yutaka;, Assignee: Terumo Kabushiki Kaisha (Tokyo, JP) |
Electronic thermometer
This invention relates to an electronic thermometer which displays a body temperature value by employing a temperature sensor, and more particularly to an improved thermometer which predicts a converg... Read More
Inventors: Ota, Hiroyuki; Kai, Isao;, Assignee: Omron Tateisi Electronics Co. (Nagaokakyo, JP) |
Accessible automated transaction machines for sight-impaired persons and print-disabled persons
The present solution to the problem of providing accessible, user-friendly electronic automated transaction systems for use by sight-impaired persons and by print-disabled persons approaches the probl... Read More
Inventors: Crandall, Jr., William F.;, Assignee: Talking Signs, Inc. (Baton Rouge, LA) |
Method and apparatus for performing authentication in communication systems
The present invention addresses the authentication problem by providing an authentication interoperability function (AIF) that permits the authentication of users as they roam between networks that us... Read More
Inventors: Berenzweig, Adam L.;, Assignee: Lucent Technologies Inc. (Murray Hill, NJ) |
Taped data copying utilizing multiple addressable memories
This invention provides an improved system and method for producing multiple copies of recorded data. The system utilizes multiple addressable memories, each of which is commonly connected to a comput... Read More
Inventors: Sherritt, Jay G.;, Assignee: IDB Corporation (Boulder, CO) |
Dropout compensating apparatus using a digital delay circuit
Therefore, an object of the present invention is to provide a dropout compensating apparatus which performs dropout compensation without deteriorating signal quality (high S/N). Another object of the ... Read More
Inventors: Tomita, Masao; Hashima, Akio; Ohta, Haruo; Matsuo, Tadaaki;, Assignee: Matsushita Electric Industrial Co., Ltd. (Kadoma, JP) |
Telephone dialing system
I claim: 1. A system for dialing a telephone, comprising: a planar card having a planar handle portion at one end for use as a handle and in carrying identifying indicia and a contiguous, planar code ... Read More
Inventors: Al-Rawi, Omar M. A.;, Assignee: |
Displaceable roof structure
I claim: 1. A sunshade, which includes: a panel locating structure supportable on a support structure, a plurality of panels, including means for filtering sunlight, displaceably located within the pa... Read More
Inventors: de Jager, Johannes A.;, Assignee: |
Card including rotatory system optical recording medium
An object of the present invention is to provide a card including a rotatory system optical recording medium with good portability which can remove the drawbacks of the prior art as described above, c... Read More
Inventors: Nakahara, Takashi;, Assignee: Canon Kabushiki Kaisha (Tokyo, JP) |
X-ray examination apparatus comprising adjustment-control means and adjustment-control means for use in an X-ray examination apparatus
OF THE PREFERRED EMBODIMENT The sole Figure shows a schematic view of an X-ray examination apparatus in accordance with the invention. An X-ray stand 1 comprising a support 2 being suspended from the... Read More
Inventors: Hoornaert, Bart P. A. J.; Hoorn, Jacques O.;, Assignee: U.S. Philips Corporation (New York, NY) |
Automatic level control circuit
What we claim is: 1. An automatic level control circuit for controlling the level of an input signal comprising: a gain controlled circuit having input, output and control ports, said input port for c... Read More
Inventors: Yamaguchi, Hiroyasu;, Assignee: Tokyo Shibaura Denki Kabushiki Kaisha (Kawasaki, JP) |
Directional detector for power level control
In radio frequency transmitters for digital communication systems there is a need to adjust the transmitter power level over a wide range. As part of the power level control or adjustment loop, a dire... Read More
Inventors: Pakonen, Hannu;, Assignee: Nokia Mobile Phones Ltd. () |
Teleconferencing audio bridge
FIG. 1 illustrates, in block diagram form, a communications network which includes a teleconferencing audio bridge designed according to the principles of the invention. The communications network of... Read More
Inventors: Horn, David N.;, Assignee: Lucent Technologies, Inc. (Murray Hill, NJ) |
Automated interactive bill payment system using debit cards
The foregoing problems are solved and a technical advance is achieved by method and apparatus of the present invention for an improved universal bill payment system. In a departure from the art, bills... Read More
Inventors: Rogers, Catherine R.;, Assignee: Telepay (Dallas, TX) |
Real-time billing system for a call processing system
The present invention is directed to a call processing system and method which provides a wide range of enhanced calling products and features to subscribers. The subscribers can include individual us... Read More
Inventors: Hogan, Steven J.; Feltz, Kristi T.; Murdock, Douglas R.;, Assignee: LinkUSA Corporation (Cedar Rapids, IA) |
Switch hook status determination in a communication system
In one embodiment, a communication system line card employs the precision and stability of digital signal processing technology with the flexibility of software to provide reliable and adaptable inter... Read More
Inventors: Zhou, Yan;, Assignee: Legerity, Inc. (Austin, TX) |
Telephone set usable as an acoustic coupler
It is one object of the present invention to provide a novel telephone set usable as an acoustic coupler, which has both an acoustic coupler function and a telephone function. It is another object of ... Read More
Inventors: Imagawa, Yasunori;, Assignee: Nisser Opto Co., Ltd. (Shizuoka, JP) |
Transmission line transformer with DC isolation
It is therefore an object of the present invention to provide a transmission line transformer with DC isolation and with a substantially uniform frequency response over a broad range of frequencies. T... Read More
Inventors: Edwards, Richard C.;, Assignee: Rockwell International Corporation (Seal Beach, CA) |
Monolithic double balanced microstrip mixer with flat conversion loss
In the practice of the present invention, a double balanced mixer circuit comprising a diode ring modulator, a first balun having a first impedance coupled to said diode ring modulator for supplying r... Read More
Inventors: Sadhir, Virender K.;, Assignee: ITT Corporation (New York, NY) |
Interference insensitive line supervision circuit
What is claimed is: 1. A connecting circuit for telephone lines which comprises a line supervision circuit means for providing signals in response to open and closed circuits of said lines, said line ... Read More
Inventors: Dijkmans, Eise C.; Aagaard, Einar A.;, Assignee: U.S. Philips Corporation (New York, NY) |
Circuit for suppressing noise influences in the evaluation of signal states on transmission lines
We claim: 1. A circuit arrangement for suppressing noise voltage components which are superposed on a DC voltage signal which is to be evaluated as a status signal on a two-wire transmission line whic... Read More
Inventors: Dalhof, Axel; Lechner, Robert;, Assignee: Siemens Aktiengesellschaft (Berlin & Munich, DE) |
Semiconductor read only memory
An object of this invention is to provide an improved semiconductor fused programmable read only memory for preventing destruction of the surface thereof. The semiconductor fused programmable read onl... Read More
Inventors: Kihara, Kazuo; Ikeda, Masashi;, Assignee: Tokyo Shibaura Denki Kabushiki Kaisha (Kawasaki, JP) |
Multiple independent binary bit stream generator
I claim: 1. An apparatus for generating a plurality of binary bit streams, comprising: means for generating a first binary bit stream at a first rate, and a plurality of circuits, each circuit compris... Read More
Inventors: Snow, Brian D.;, Assignee: The United States of America as represented by the National Security (Ft. George G. Meade, MD) |
Multi-layered foldable cross connect field
The present invention is directed at overcoming the shortcomings of the prior art. Specifically, the invention is directed to a multi-layered enclosure that contains on a first layer a splice box, a p... Read More
Inventors: Daoud, Bassel Hage;, Assignee: Lucent Technologies Inc. (Murray Hill, NJ) |
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