Card file address locator and code checker

Claim 2

A decoding and readout device for receiving a coded pulse train repeated at least twice during a predetermined signal reception period, comprising at least two signal channels through which signal pulses are conducted, and a plurality of signal readout devices interconnected with said signal channels, said signal channels including decoding means for selecting one of said readout devices in response to reception of said coded pulse train during a first signal transmission interval, energizing means charged by the decoding means during said first interval and means discharging the energizing means in response to repetition of said coded pulse train during a second signal transmission interval within said signal reception period for operating the selected one of the readout devices.

Claim 3

A decoding and readout device for receiving a coded pulse train repeated at least twice during a predetermined signal reception period, comprising at least two signal channels through which signal pulses are conducted, and a plurality of signal readout devices interconnected with said signal channels, said signal channels including decoding means for selecting one of said readout devices in response to reception of said coded pulse train during a first signal transmission interval, energizing means for operating the selected one of the readout devices in response to repetition of said coded pulse train during a second signal transmission interval within said signal reception period, delay means connected to one of the signal channels for developing a drive pulse after each of said signal transmission intervals applied to the decoding means in each of the signal channels, means connected to the delay means for resetting the signal channels following completion of the initial and repeated pulse trains, and means responsive to said selection of the readout device for reversing the drive pulse developed by the delay means following reception of the initial pulse train to condition the energizing means for operation.

Claim 4

A decoding and readout device for receiving a coded pulse train repeated at least twice during a predetermined signal reception period, comprising at least two signal channels through which signal pulses are conducted, and a plurality of signal readout devices interconnected with said signal channels, said signal channels including decoding means for selecting one of said readout devices in response to reception of said coded pulse train during a first signal transmission interval, energizing means for operating the selected one of the readout devices in response to repetition of said coded pulse train during a second signal transmission interval within said signal reception period, delay means connected to one of the signal channels for developing a drive pulse after each of said signal transmission intervals applied to the decoding means in each of the signal channels, means connected to the delay means for resetting the signal channels following completion of the initial and repeated pulse trains, and means responsive to said selection of the readout device for reversing the drive pulse developed by the delay means following reception of the initial pulse train to condition the energizing means for operation.

Claim 5

The combination of claim 2 including current-responsive means connected to the energizing means for sensing operation of the selected readout device, and signal-generating means rendered operative by the current-responsive means for indicating successful reception of the repeated coded pulse train.

Claim 6

In combination with the device of claim 3, telephone lines connected to the signal channels which further include band-pass amplifiers through which signals of different frequencies are respectively conducted, said coded pulse train being composed of signal portions transmitted at said different frequencies.

Claim 7

The combination of claim 4 wherein said decoding means in each of the signal channels includes a plurality of relay stages sequentially operated by successive pulses of the coded pulse train and released by the resetting means following completion of pulse train reception, and a plurality of load relays successively rendered operative and released by corresponding relay stages in rEsponse to development of said drive pulses.

Claim 8

The combination of claim 5 wherein said energizing means includes energy storage means connected to the selecting means in each of the signal channels, and energizing circuit means rendered operative by the selecting means to alternately charge the energy storage means and discharge the same through the selected readout device.

Claim 9

The combination of claim 2 wherein said energizing means includes energy storage means connected to the selecting means in each of the signal channels, and energizing circuit means rendered operative by the selecting means to alternately charge the energy storage means and discharge the same through the selected readout device.

Claim 10

The combination of claim 7 wherein said decoding means in each of the signal channels includes a plurality of relay stages sequentially operated by successive pulses of the coded pulse train and released by the resetting means following completion of pulse train reception, and a plurality of load relays successively rendered operative and released by corresponding relay stages in response to development of said drive pulses.

Claim 11

The combination of claim 2 wherein said decoding means in each of the signal channels includes a plurality of relay stages sequentially operated by successive pulses of the coded pulse train and released by the resetting means following completion of pulse train reception, and a plurality of load relays successively rendered operative and released by corresponding relay stages in response to development of said drive pulses.

Claim 12

In combination with the device of claim 1, telephone lines connected to the signal channels which further include band-pass amplifiers through which signals of different frequencies are respectively conducted, said coded pulse train being composed of signal portions transmitted at said different frequencies.

Claim 13

The combination of claim 10 including current-responsive means connected to the energizing means for sensing operation of the selected readout device, and signal-generating means rendered operative by the current-responsive means for indicating successful reception of the repeated coded pulse train.

Claim 14

The combination of claim 1 including current-responsive means connected to the energizing means for sensing operation of the selected readout device, and signal-generating means rendered operative by the current-responsive means for indicating successful reception of the repeated coded pulse train.

Claim 15

The combination of claim 1 wherein said decoding means in each of the signal channels includes a plurality of relay stages sequentially operating by successive pulses of the coded pulse train and released by the resetting means following completion of pulse train reception, and a plurality of a load relays successively rendered operative and released by corresponding relay stages in response to development of said drive pulses.

Claim 16

The combination of claim 1 wherein said energizing means includes energy storage means connected to the selecting means in each of the signal channels, and energizing circuit means rendered operative by the selecting means to alternately charge the energy storage means and discharge the same through the selected readout device.

Claim 17

In combination with a communication system having message lines across which a predetermined voltage is established when connected to a receiving station, means for decoding a coded pulse train transmitted to the receiving station through the message lines during a signal period of limited duration comprising a plurality of solenoid-operated devices, means responsive to initial reception of said coded pulse train for selecting one of the solenoid-operated devices, and means connected to the message lines for storing energy and discharging the same through the selected one of the solenoid-operated devices in response to reception of the coded pulse train during said signal period repeated at least two times.

Claim 18

In combination with a communication system having message lines across which a predetermined voltage is established when connected to a receiving station, means for decoding a coded pulse train transmitted to the receiving station through the message lines during a signal period of limited duration comprising a plurality of solenoid-operated devices, means responsive to initial reception of said coded pulse train for selecting one of the solenoid-operated devices, and means connected to the message lines for storing energy and discharging the same through the selected one of the solenoid-operated devices in response to reception of the coded pulse train during said signal period repeated at least two times.

Claim 19

The combination of claiM 15 including means responsive to energization of the selected one of the solenoid-operated devices for generating a return signal transmitted to the message lines for indicating successful reception of the coded pulse train.