Abstract: A printed circuit board component mounting support and spacer having a base with an essentially rectangular face and at least four essentially rectangular feet extending out from the rectangular planar surface of the base. Extending upwards from the base from the long edges thereof are two essentially rectangular sides to cradle an electrical component. The base has two slots extending inward from the short edges thereof a predetermined distance. The slots terminate in an edge of a predetermined configuration and are wide enough to permit the passage of component electrical leads therebetween.

Abstract: A tone responsive disabling circuit for disabling prior to the transmission of data on a telephone transmission line a device which is connected to the line for improving voice transmission on the line. The disabling circuit operates in response to the transmission on the line of a tone signal whose frequency falls within a predetermined band width and which also has a predetermined amplitude and minimum duration. The disabling circuit processes the signal transmitted on the line to generate two control signals. One of the control signals is a function of the transmission line signal. The other is a function of the energy contained in the transmission line signal which lies in a predetermined frequency band which is not the tone frequency band. When the control signal which is a function of the transmission line signal is greater in amplitude than both a reference signal and the energy related control signal, a phase locked loop is enabled to capture the tone signal and disable the voice improving device.

Abstract: A circuit breaker for interrupting current through plural electrical circuits has a separate current responsive circuit path for each electrical circuit. Each path includes a manually operable latching mechanism capable of engaging and disengaging a pair of electrical contacts on demand and further includes a circuit responsive releaseable latch mechanism for automatically disengaging the pair of contacts. A common manually activated handle is connected to each of the latching mechanisms to enable manual and automatic operation of the breaker for simultaneous engagement or disengagement of the paired electrical contacts. The connection of the common handle to the several latching mechanisms encompasses a trip bar arranged for both pivotal movement about an axis parallel to the axis of the handle and sliding movement relative to guides within a common insulating case of the circuit breaker.

Abstract: A circuit for supplying drop current to the subscriber connected to the remote terminal of a central office powered telecommunications system. A switching regulator is included in the circuit for generating the drop current. The switching regulator adjusts its conduction time as a function of the length of the loop connecting the subscriber to the terminal such that the subscriber consumes only that power required by the loop length. The switching regulator operates in response to a reference current generated by a control circuit. A central office supplied signal on the transmission means connecting the central office to the terminal is used for transferring power to the terminal. The amplitude of that signal at the terminal varies with system load.

Abstract: The disclosed circuit breaker includes a movable contact which enters the space between stationary contact jaws, the movable contact acting through a spring to bias a jaw-closing toggle toward erect condition, so that contacts on the contact jaws firmly grip the movable contact.

Abstract: The present invention relates to circuit breakers of a particular class, namely, the type in which a toggle is manually erected to drive a "heart" as a unit for closing the circuit breaker. The "heart" includes a contact arm, an actuator, and overcurrent releasable latch means which collectively form a normally latched unit. Under excess-current conditions, the latch means releases the actuator, and contact arm then opens the circuit.The latch means includes a conventional bimetal fixed at one end to the contact arm. The bimetal carries a pivoted latch lever, and is surrounded by a core-and-armature unit adjacent its secured end, for operating the latch lever in response to high overcurrents. High magnetic trip sensitivity is achieved in a construction wherein the whole electromagnet moves with the contact arm, without resort to a current-carrying coil for the electromagnet.

Abstract: A circuit for use in a multiphase regulated supply to provide regulation of the ripple current contained in the filtered d.c. output signal of the supply. The supply regulates its output voltage and/or current by controlling the conduction time of the switching elements contained in the rectifier portion of the supply. The switching element conduction time is controlled by controlling the generation of firing pulses to the switching elements as a function of an error control signal which is equal to a first error signal. This signal is equal to the amount by which the actual value of said voltage and/or current deviates from a reference value of said parameter. When the ripple regulation circuit is included in the supply, a second error signal is generated which represents the deviation of the d.c. value of the ripple from a predetermined reference.

Abstract: This invention relates to an improved digital scale arrangement which employs apparatus for generating an electrical analog signal representing the weight on the scale mechanism. The analog signal is then converted to a digital representation of the weight on the scale under control of a microprocessor or microcomputer. The microcomputer then further processes the digital representation and causes it to be displayed. In accordance with the present invention, a fully automatically operating arrangement is provided for verifying the correct operation of the analog portion, the converting portion, and the digital portion of the arrangement. In addition, the arrangement is also employed to automatically correct the span of the scale under control of the results of the verification operation.

Abstract: The invention relates to a scale system which employs a microcomputer forming an integral part of the analog to digital conversion means in which the microcomputer controls the sequence of operations for performing the conversion, accumulates and stores digital data derived during the conversion of the analog signal and combines and processes that data to provide the digital output data resulting from the conversion, all in addition to performing other scale functions. The invention relates to an improved multicapacity weighing and computing digital scale having a triple slope analog-to-digital conversion means. The analog weight signal is integrated for a time interval which is fixed for a given scale capacity range which would generate substantially the same integrator output level in response to a full capacity weight signal for the selected scale capacity as would be generated by a full capacity weight for all other scale capacities.

Abstract: The invention relates to a scale system which employs a microcomputer forming an integral part of the analog to digital conversion means in which the microcomputer controls the sequence of operations for performing the conversion, accumulates and stores digital data derived during the conversion of the analog signal and combines and processes that data to provide the digital output data resulting from the conversion, all in addition to performing other scale functions. The invention relates to an improved multicapacity weighing and computing digital scale having a triple slope analog-to-digital conversion means. The analog weight signal is integrated for a time interval which is fixed for a given scale capacity range which would generate substantially the same integrator output level in response to a full capacity weight signal for the selected scale capacity as would be generated by a full capacity weight for all other scale capacities.

Abstract: The invention relates to a scale system which employs a microcomputer forming an integral part of the analog to digital conversion means in which the microcomputer controls the sequence of operations for performing the conversion, accumulates and stores digital data derived during the conversion of the analog signal and combines and processes that data to provide the digital output data resulting from the conversion, all in addition to performing other scale functions. The invention relates to an improved multicapacity weighing and computing digital scale in which switch means are provided to change the weight indication from pounds to kilograms and visa versa at any time either before or during a weighing operation. Provision is made to also convert all the weight limits and any stored tare weight. In addition, the unit price and total price or value display is either cleared or else converted from price per pound to price per kilogram and the total price recomputed.