Abstract: In a telephone conferencing system, a digital communication network such as the Internet is used to establish and control the telephone connections between multiple conferees with the telephone network being the means of exchanging verbal information. Each conferee may have a computer connected to the digital network, and each has an independent telephone instrument connected to the public switched telephone network. An in-charge conferee utilizes his computer containing appropriate software to initiate the conference and to control the participation of the conferees. The in-charge conferee sends digital control signals to a switch interface controlling a telephone switch as a gateway to the telephone network using SS7 control signals. These SS7 control signals include the commands by which the conferee telephones are rung up, brought on line, or dropped from the conference.

Abstract: In a telephone conferencing system, a digital communication network such as the Internet is used to establish and control the telephone connections between multiple conferees with the telephone network being the means of exchanging verbal information. Each conferee may have a computer connected to the digital network, and each has an independent telephone instrument connected to the public switched telephone network. An in-charge conferee utilizes his computer containing appropriate software to initiate the conference and to control the participation of the conferees. The in-charge conferee sends digital control signals to a switch interface controlling a telephone switch as a gateway to the telephone network using SS7 control signals. These SS7 control signals include the commands by which the conferee telephones are rung up, brought on line, or dropped from the conference.

Abstract: In a telephone conferencing system, a digital communication network such as the Internet is used to establish and control the telephone connections between multiple conferees with the telephone network being the means of exchanging verbal information. Each conferee may have a computer connected to the digital network, and each has an independent telephone instrument connected to the public switched telephone network. An in-charge conferee utilizes his computer containing appropriate software to initiate the conference and to control the participation of the conferees. The in-charge conferee sends digital control signals to a switch interface controlling a telephone switch as a gateway to the telephone network using SS7 control signals. These SS7 control signals include the commands by which the conferee telephones are rung up, brought on line, or dropped from the conference.

Abstract: In a telephone conferencing system, a digital communication network such as the Internet is used to establish and control the telephone connections between multiple conferees with the telephone network being the means of exchanging verbal information. Each conferee may have a computer connected to the digital network, and each has an independent telephone instrument connected to the public switched telephone network. An in-charge conferee utilizes his computer containing appropriate software to initiate the conference and to control the participation of the conferees. The in-charge conferee sends digital control signals to a switch interface controlling a telephone switch as a gateway to the telephone network using SS7 control signals. These SS7 control signals include the commands by which the conferee telephones are rung up, brought on line, or dropped from the conference.

Abstract: In a telephone conferencing system, a digital communication network such as the Internet is used to establish and control the telephone connections between multiple conferees with the telephone network being the means of exchanging verbal information. Each conferee may have a computer connected to the digital network, and each has an independent telephone instrument connected to the public switched telephone network. An in-charge conferee utilizes his computer containing appropriate software to initiate the conference and to control the participation of the conferees. The in-charge conferee sends digital control signals to a switch interface controlling a telephone switch as a gateway to the telephone network using SS7 control signals. These SS7 control signals include the commands by which the conferee telephones are rung up, brought on line, or dropped from the conference.

Abstract: In a telephone conferencing system, a digital communication network such as the Internet is used to establish and control the telephone connections between multiple conferees with the telephone network being the means of exchanging verbal information. Each conferee may have a computer connected to the digital network, and each has an independent telephone instrument connected to the public switched telephone network. An in-charge conferee utilizes his computer containing appropriate software to initiate the conference and to control the participation of the conferees. The in-charge conferee sends digital control signals to a switch interface controlling a telephone switch as a gateway to the telephone network using SS7 control signals. These SS7 control signals include the commands by which the conferee telephones are rung up, brought on line, or dropped from the conference.

Abstract: An interactive display system is provided for use with (i) a program source having an associated video output signal and a digital data stream, the digital data stream being modulated on the video output signal, and (ii) a monitor in communication with the program source for displaying the output, the display system. The system in a preferred embodiment has a data decoder, for separating the digital data stream and a viewer control box. The control box has a user input for receiving user selections, a data input in communication with the data decoder for receiving the digital data stream, and a program execution module in communication with the user input and the data input. A video cassette for use in such a system is also provided.

Abstract: A digital communication network such as the Internet is used to establish and control the telephone connections between two conferees with the telephone network being the means of exchanging verbal information. Each of the two conferees has a computer connected to the digital network, and each has an independent telephone instrument connected to the public switched telephone network. One of the conferees utilizes his computer containing appropriate software to initiate the call to the other conferee. The initiating conferee sends digital control information to a switch interface controlling a telephone switch as a gateway to the telephone network using SS7 control signals which implements the telephone connection between the conferees. The switch also provides telephone status information transmitted back over the digital network, and the status information is displayed on the computer monitors of the conferees.

Abstract: In a telephone conferencing system, a digital communication network such as the Internet is used to establish and control the telephone connections between multiple conferees with the telephone network being the means of exchanging verbal information. Each conferee may have a computer connected to the digital network, and each has an independent telephone instrument connected to the public switched telephone network. An in-charge conferee utilizes his computer containing appropriate software to initiate the conference and to control the participation of the conferees. The in-charge conferee sends digital control signals to a switch interface controlling a telephone switch as a gateway to the telephone network using SS7 control signals. These SS7 control signals include the commands by which the conferee telephones are rung up, brought on line, or dropped from the conference.

Abstract: In a telephone conferencing system, a digital communication network is used to establish and control the telephone connections between multiple conferees with the telephone network being the means of exchanging verbal information. Each conferee may have a computer connected to the digital network, and each has an independent telephone instrument connected to the public switched telephone network. An in-charge conferee utilizes his computer containing appropriate software to initiate the conference and to control the participation of the conferees. The in-charge conferee sends digital control signals to a switch interface controlling a telephone switch as a gateway to the telephone network. These control signals include the commands by which the conferee telephones are rung up, brought on line, or dropped from the conference.

Abstract: A temperature warning device for monitoring the temperature of an article and for providing a dependable signal that a preselected temperature has been reached. The device includes an axially extending bore into which a heat responsive element, a driver, and a sensing indicator are arranged. The bore is normally sealed by a closure plug to prevent failure due to contaminants. Upon reaching a preselected temperature the element exerts force against the driver which in turn forcibly removes the closure plug, exposing the indicator.

Abstract: A system for recording audio and video signals on magnetic and other media including a generator of a time-reference square-wave signal, a circuit for combining the dc level with an input audio or video signal, and a sampling circuit wherein the sum of the input signal and the dc level are sampled in synchronism with the square-wave signal. The time-reference signal and a second signal, delayed therefrom, are then recorded by saturation of the magnetic medium in both positive and negative directions. The amount of delay between the two recorded signals is proportional to the amplitudes of the successive samples of the sampling circuit. After playback, the original input signal is retrieved from the recorded signals by comparing successive samples with a succession of ramp waveforms and filtering out the sampling spectrum and the dc level.

Abstract: An arrangement for recording an analog signal onto magnetic tape in which the analog signal modulates a square wave bias field by moving the negative-going transition of the square wave so that the average of the positive portion and negative portion of the square wave, equals the instantaneous value of the analog signal. The period of the total square wave, is maintained constant. The analog signal is compared to a periodic triangular-shaped wave, in a comparator, and the output of the comparator becomes switched in polarity whenever the analog modulating signal is equal in value to the instantaneous value of the triangular wave. The point at which polarity is switched corresponds to an intersection of the analog signal superimposed on the triangular wave. The resultant modulated square wave is applied to a recording head.

Abstract: An arrangement for high speed recorders to reduce the time for recording information, comprising data storage means for storing elements of information to be recorded, recording means for recording information on a recording medium, means for transmitting said elements to said recording means, said recording means being operable to record within a predetermined time duration said elements of information transmitted from said data storage means, and means for reducing the recording time operatively associated with said data transmission means and comprising means for detecting the value of an element of information transmitted from said data storage means and means for shipping said recording step when said information has a predetermined value.

Abstract: An arrangement for making a hard copy of a cathode ray tube display. Each horizontal line of a video signal is subdivided into a predetermined number of intervals. The amplitude of the video signal within each interval is digitized, and the digitized data, after being stored in a first-in-first-out shift register, is recorded on any desired recording medium, such as heat-sensitive or electro-sensitive paper. Each horizontal line is printed along a line on the paper, and the paper is advanced by one line when the next horizontal line of the video signal is ready to be recorded. The subdividing of each horizontal line is carried out by a phase-lock loop which functions as a frequency multiplier and provides a predetermined number of pulses for each horizontal sync pulse. Each horizontal line being processed is identified by a line counter to ensure that the horizontal lines of a frame are sequentially printed.

Abstract: A data processing system which synchronizes an internal clock with an external clock. The system can be incorporated as part of a magnetic reproducer apparatus or magnetic recorder apparatus. The recorder/reproducer apparatus utilizes ratio encoding schemes to convert conventional data into encoded data to be recorded onto a magnetic medium. It can also read the encoded data from a magnetic medium and convert it back into conventional data. In either case, the synchronized internal clock is utilized as the time base for the ratio encoding.

Abstract: A displacement transducer in which two toothed members have magnetic poles arranged in alternating sequence. The toothed members cooperate so that one magnetic pole on one of the members is spaced from a magnetic pole of opposite polarity on the other member. The magnetic poles, furthermore, are spaced so that magnetic flux lines pass through the space or air gap between poles of opposite polarity. A magneto-resistive element is held within that air gap between magnetic poles, and is intercepted by the magnetic flux lines. This magneto-resistive element has an electrical resistance which is dependent on the angular orientation and magnitude of the flux lines with respect to the element. By measuring the electrical resistance of the magneto-resistive element, the angular orientation of the flux lines and thereby the relative displacement of the toothed members may be obtained.

Abstract: A magnetic storage disc for storing information comprises a spiral of magnetic tape supported edgewise on a disc having a flat bottom surface, one or both sides of the magnetic tape being available for recording information thereon.

Abstract: A continuous loop tape cassette with a rotating tape coil carried by a flanged, reverse e-shaped hub in fixed radial angular relation to the base of the cassette. A tape receiving arc portion of the hub has a radius sufficiently great relative to the spring modulus of the tape to prevent binding. The arc portion is undercut to contain the tape.