Current-analyzing and coding device usable particularly in telecommunications for number dialing by means of a key set专利检索-键盘记录器木马病毒电脑安全专利检索查询-专利查询网

Current-analyzing and coding device usable particularly in telecommunications for number dialing by means of a key set

阅读：61发布：2020-12-22

专利汇可以提供Current-analyzing and coding device usable particularly in telecommunications for number dialing by means of a key set专利检索，专利查询，专利分析的服务。并且A current analyzer-coder for a number-dialing system by keyboard control with impedance variation, wherein the state of a plurality of current analyzing relays which operate only in prescribed current ranges indicates the impedance of the line, and means is provided to assure that only a single analyzing relay is engaged for each resistance value, the combination further including means for transferring the information being received to a register or recorder and consisting of a gate controlling a thyristor, and a control device authorizing the transfer only at a specific instant.，下面是Current-analyzing and coding device usable particularly in telecommunications for number dialing by means of a key set专利的具体信息内容。

权利要求

1. In combination with a number dialing system providing for the selective connection to a line of two resistors whose values designate a number to be dialed each time a key on a keyboard is depressed, the two resistors each being connected in series with means for permitting current flow through the resistors only in opposite directions, and register means responsive to a key being depressed for applying an analyzing current to said line, a current analyzing and coding device comprising a plurality of analyzing relays each providing an output and having windings connected in series with said line and being capable of operating only in respective separate and distinct current zones of sequential order, regulation means connected to said analyzing relays for preventing more than a single relay from operating for each current zone, including an individual regulation resistor connected in series with a second bipolar winding of each analyzing relay, respectively, across a voltage source, and a diode connected between the output of each analyzing relay and the regulation resistors of all relays having higher order current zones, measuring means for effecting two successive measurements of the line current by controlling the direction of the current in the line, transfer means for transferring signals indicating the operating state of the analyzing relays to said register, and control means producing coincidence impulses for controlling the operation of said transfer means at a specific instant.

2. The combination defined in claim 1 wherein said transfer means includes a gate connected to the output of each analyzing relay, and a thyristor provided for each analyzing relay, the respective gates of said analyzing relays being connected to the control electrodes of the corresponding thyristors.

3. The combination defined in claim 2 wherein four regulation resistors are provided having values which differ in geometric progression in the ratio 2.

4. The combination defined in claim 3 wherein four analyzing relays are associated with the four regulation resistors and are individually connected to respective thyristors by individual gates, said control means including actuating means responsive to the depression of a key on the keyboard for enabling said gates during a first measuring period.

5. The combination defined in claim 4 wherein said measurement means includes inversion means responsive to depression of a key on the keyboard for reversing the current in said line after a predetermined time to thereby provide first and second measuring periods during which said current flows in opposite directions in the line.

6. The combination defined in claim 5 wherein said actuating means includes means responsive to said measurement means for enabling said gates during said second measuring period.

7. The combination defined in claim 6 wherein said transfer means includes additional relay means responsive to the outputs of said thyristors for providing an output when the two measuring resistors connected to the line are of equal value.

8. The combination defined in claim 1 wherein said transfer means includes a gate connected to the output of each analyzing relay, and a thyristor provided for each analyzing relay, the respective gates of said analyzing relays being connected to the control electrodes of the corresponding thyristors.

9. The combination defined in claim 1 wherein said measurement means includes inversion means responsive to depression of a key on the keyboard for reversing the current in said line after a predetermined time to thereby provide first and second measuring periods during which said current flows in opposite directions in the line.

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Current-analyzing and coding device usable particularly in telecommunications for number dialing by means of a key set

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