Disconnector circuit arrangement

Claim 2

A disconnector circuit arrangement for use on the central office main distrIbuting frame to selectively disconnect one subscriber in a party line from the central office equipment and couple said one subscriber to a recording means, comprising: means to select the one subscriber to be placed in an out-ofservice condition; a diode detector means coupled to said select means to detect the one subscriber attempting connection through the central office main distributing frame; a relay arrangement coupled to said select and detector means and having first means for separating the one subscriber from the central office equipment and second means for simultaneously coupling the one subscriber to a recorded message indicating the out-of-service status, said arrangement including a transistor for holding said one subscriber disconnected and connected to said recorded message as long as said subscriber is off-hook, said transistor coupled in the emitter ground configuration and between said one subscriber and the relay coil of said relay arrangement; and said relay arrangement including a neon lamp which conducts in response to incoming calls to said one subscriber to enable coupling of the incoming call to another recorded message indicating the out-of-service condition of the one subscriber.

Claim 3

A disconnector circuit arrangement for use with a plug-jack arrangement on the central office main distributing frame to disconnect one subscriber of a party line from the switching system of the office and connect the one subscriber to a recorded message, the arrangement comprising in combination: a party select key to select the one subscriber to be placed in an out-of-service condition; a party detector means coupled to said select key; a caller detector and answering means coupled to said select key; a relay coil responsive to said party and caller means; a line disconnector and recorder connector circuit containing a plurality of contacts activated by said relay coil to switch said one subscriber to a first recorded message and said caller to a second recorded message when said coil is energized by either said party means or said caller means; and a relay holding circuit coupled between said relay coil and said line disconnector and recorder connector circuit for holding said relay coil energized for time determined by said one subscriber and said caller, said holding circuit includes a transistor and a pair of additional contacts activated by said coil, said transistor and one of said pairs of contacts enabling said relay coil to remain energized as long as said one subscriber is off-hook, and said other of said pair of contacts enabling said coil to remain energized as long as said caller is connected to said second recorded message.

Claim 4

A disconnector circuit arrangement for use with a plug-jack arrangement on the central office main distributing frame to disconnect one subscriber of a party line from the switching system of the office and connect the one subscriber to a recorded message, the arrangement comprising in combination: a party select key to select the one subscriber to be placed in an out-of-service condition; a party detector means coupled to said select key; a caller detector and answering means coupled to said select key; a relay coil responsive to said party and caller means; a line disconnector and recorder connector circuit containing a plurality of contacts activated by said relay coil to switch said one subscriber to a first recorded message and said caller to a second recorded message when said coil is energized by either said party means or said caller means; and a relay holding circuit coupled between said relay coil and said line disconnector and recorder connector circuit for holding said relay coil energized for time determined by said one subscriber and said caller, said holding circuit includes a transistor and a pair of additional contacts activated by said coil, said transistor and one of said pairs of contacts enabling said relay coil to remain energized as long as said one subscriber is off-hook, and said other of said pair of contacts enabling said coil to remain energized as long as said caller is connected to said second recorded message.

Claim 5

The combination of claim 2 wherein said caller detector and answering means includes a neon lamp which conducts to simulate an answered call.

Claim 6

The combination of claim 2 wherein said party detector means is a diode.

Claim 7

The combination of claim 2 including a relay diode bridging said relay coil to control voltage peaks when the relay coil is de-energized.