Telephone line transfer circuit using disjoint routing network for partial decoding

Claim 2

For a telephone system of the type including a ringing output, and means adapted to apply a ringing voltage to said ringing output following completion of receipt of a digit from a calling station; a line transfer system comprising: a. a relay counter having 2. a plurality of counting relays, 2. means, including contacts of said counting relays, interconnecting said counting relays and responsive to receipt of a digit from said calling station to operate said counting relays in a plurality of predetermined operating combinations, one said predetermined operating combination for each digit received, 3. a disjoint routing contact network having first and second inputs and a plurality of first outputs, said first outputs being divided into first and second groups, said first group including at least two of said first outputs but not all of said first outputs, said second group comprising the remainder of said first outputs, 4. said routing contact network including means, including a plurality of routing contacts of said counting relays, responsive to operation of said relays in said operating combinations for connecting said first input to a different first output for each said operating combination, 5. said routing contact network including means, including some of said routing contacts, responsive to operation of said relays in said operating combinations for connecting said second input to outputs of said first group for at least some of said operating combinations and for disconnecting said second input from said outputs of said second group for all of said operating combinations, b. means for connecting said ringing output to said first input, c. transfer switch means connected to one of said first outputs and operative on receipt of a transfer signal at said one first output, d. said transfer switch means including means for disconnecting said ringing output from said first input and for connecting said ringing output instead to said second input upon operation of said transfer switch means, e. said transfer switch means further including a plurality of second outputs, and connecting and decoding means coupled to said first group of first outputs and responsive, when said transfer switch means is operated, to receipt of a digit from said calling station and to consequent connection of said second input to a selected output of said first group, to connect said selected output of said first group to a said second output corresponding to the diGit received.

Claim 3

a plurality of counting relays,

Claim 4

a plurality of counting relays,

Claim 5

means, including contacts of said counting relays, interconnecting said counting relays and responsive to receipt of a digit from said calling station to operate said counting relays in a plurality of predetermined operating combinations, one said predetermined operating combination for each digit received,

Claim 6

means, including contacts of said counting relays, interconnecting said counting relays and responsive to receipt of a digit from said calling station to operate said counting relays in a plurality of predetermined operating combinations, one said predetermined operating combination for each digit received,

Claim 7

A line transfer circuit according to claim 1 wherein said connecting and decoding means includes a plurality of decoding relays, fewer in number than the number of said counting relays, and means connecting said decoding relays to selected counting relays for operation, when said transfer switch is operated, when said selected counting relays are operated.

Claim 8

a disjoint routing contact network having first and second inputs and a plurality of first outputs, said first outputs being divided into first and second groups, said first group including at least two of said first outputs but not all of said first outputs, said second group comprising the remainder of said first outputs,

Claim 9

a disjoint routing contact network having first and second inputs and a plurality of first outputs, said first outputs being divided into first and second groups, said first group including at least two of said first outputs but not all of said first outputs, said second group comprising the remainder of said first outputs,

Claim 10

A line transfer system according to claim 1 wherein said connecting and decoding means includes a pair of decoding relays, and means connecting said decoding relays to selected counting relays for operation, when said transfer switch is operated, when said selected counting relays are operated.

Claim 11

A line transfer system according to claim 1 wherein said first outputs are 10 in number, said first group consisting of four of said first outputs.

Claim 12

said routing contact network including means, including a plurality of routing contacts of said counting relays, responsive to operation of said relays in said operating combinations for connecting said first input to a different first output for each said operating combination,

Claim 13

said routing contact network including means, including a plurality of routing contacts of said counting relays, responsive to operation of said relays in said operating combinations for connecting said first input to a different first output for each said operating combination,

Claim 14

said routing contact network including means, including some of said routing contacts, responsive to operation of said relays in said operating combinations for connecting said second input to outputs of said first group for at least some of said operating combinations and for disconnecting said second input from said outputs of said second group for all of said operating combinations, b. means for connecting said ringing output to said first input, c. transfer switch means connected to one of said first outputs and operative on receipt of a transfer signal at said one first output, d. said transfer switch means including means for disconnecting said ringing output from said first input and for connecting said ringing output instead to said second input upon operation of said transfer switch means, e. said transfer switch means further including a plurality of second outputs, and connecting and decoding means coupled to said first group of first outputs and responsive, when said transfer switch means is operated, to receipt of a digit from said calling station and to consequent connection of said second input to a selected output of said first group, to connect said selected output of said first group to a said second output corresponding to the diGit received.

Claim 15

said routing contact network including means, including some of said routing contacts, responsive to operation of said relays in said operating combinations for connecting said second input to outputs of said first group for at least some of said operating combinations and for disconnecting said second input from said outputs of said second group for all of said operating combinations, b. means for connecting said ringing output to said first input, c. transfer switch means connected to one of said first outputs and operative on receipt of a transfer signal at said one first output, d. said transfer switch means including means for disconnecting said ringing output from said first input and for connecting said ringing output instead to said second input upon operation of said transfer switch means, e. said transfer switch means further including a plurality of second outputs, and connecting and decoding means coupled to said first group of first outputs and responsive, when said transfer switch means is operated, to receipt of a digit from said calling station and to consequent connection of said second input to a selected output of said first group, to connect said selected output of said first group to a said second output corresponding to the diGit received.

Claim 16

A line transfer system according to claim 1 wherein said transfer switch means includes a detector relay connected to said one first output and operative upon receipt of said transfer signal; a transfer relay; means for operating said transfer relay upon operation of said detector relay; said transfer relay including a plurality of contacts; means including a contact of said transfer relay for releasing said detector relay upon operation of said transfer relay; said connecting and decoding means including first and second decoding relays; means including a contact of said transfer relay for enabling said decoding relays when said transfer relay is operated; means connecting said first and second decoding relays respectively to first and second counting relays of said relay counter for operation respectively when said first and second counting relays operate provided that said transfer relay is operated; said means for disconnecting said ringing output from said first input and for connecting it to said second input comprising contacts of said transfer relay.

Claim 17

A line transfer system according to claim 2 wherein said transfer switch means includes transfer relay means having a plurality of contacts; means connected to said one first output for operating said transfer relay means upon receipt of said transfer signal from said one first output; means including a contact of said transfer relay means for enabling said decoding relays when said transfer relay means is operated; said connecting and decoding means including means coupling said second outputs to said first group of first outputs through contacts of said decoding relays and through normally open contacts of said transfer relay means, said means for disconnecting said ringing output from said first input and for connecting it to said second input comprising contacts of said transfer relay means.

Claim 18

A line transfer system according to claim 6 including a plurality of said transfer switch means, said means in each transfer switch means for operating said transfer relay means thereof being connected to a different one of said first outputs, said connecting and decoding means of each transfer switch means including means coupling said second outputs of such transfer switch means to said first group of first outputs through contacts of said decoding relays of such transfer switch means and through normally open contacts of said transfer relay means of such transfer switch means; a plurality of terminals, one corresponding to each first output of said first group, and means connecting each said terminal to its associated first output through a normally closed contact of each transfer relay means, so that whenever a said transfer relay means is operated, said terminals are disconnected from said first outputs, whereby said connection of said means in each transfer switch means for operating the transfer relay means thereof to said first outputs may be through said terminals, and whereby any unused ones of said terminals may be connected directly to a said station.

Claim 19

A line transfer system according to claim 7 wherein said first outputs are 10 in number, said first group consistiNg of four of said first outputs, said decoding relays in each transfer switch means being two in number, and said second outputs of each transfer switch means are 10 in number.

Claim 20

A line transfer system according to claim 2 wherein said routing contact network includes a normally open and a normally closed routing contact of one said counting relay, means connecting such routing contacts in series to form a series connection, and first and second routing contact portions connected together by said series connection, said first input being connected between said normally open routing contact and said normally closed routing contact, whereby when said one counting relay is operated, said first input is connected to one of said contact portions and when said one counting relay is released, said first input is connected to the other of said contact portions, said second input being connected to one of said contact portions and being separated from the other contact portion by said series connection.

Claim 21

A line transfer system according to claim 9 wherein said one contact portion includes means responsive to operation of said counting relays in said operating combinations for connecting said second input to an output of said first group for every operating combination of said counting relays.

Claim 22

A line transfer system according to claim 1 wherein said relay counter has five counting relays numbered from 1 to 5 inclusive and said means for operating said relays upon receipt of a digit from said calling station operates said counting relays in the following combinations according to the digit received: COUNTING RELAYS DIGIT 1 2 3 4 5 1 off on off off off 2 on off off off off 3 off off on on off 4 off on off on off 5 on off off on on 6 off off on on on 7 off on off on on 8 on off off off on 9 off off on off on 0 off on off off on said routing contact network including normally operated and normally released contacts; one of said first outputs being connected to said first input through a normally closed contact of relay (4), a selected normally closed contact of relay (5), and a normally open contact of relay (2); a second of said first outputs being connected to said first input through normally closed contacts of relays (3), (5), (4) and (2); a third of said first outputs being connected to said first input through a normally closed contact of relay (5), a normally open contact of relay (4), and said normally closed contact of relay (2); a fourth of said first outputs being connected to said first input through a normally open contact of relay (4), said selected normally closed contact of relay (5), and said normally open contact of relay (2); a fifth of said first outputs being connected to said first input through a normally closed contact of relay (3), normally open contacts of relays (5) and (4), and said normally closed contact of relay (2); a sixth of said first outputs being connected to said first input through normally open contacts of relays (3), (5) and (4), and said normally closed contact of relay (2); a seventh of said first outputs being connected to said first input through normally open contacts of relays (4) and (5) and said normally open contact of relay (2); an eighth of said first outputs being connected to said first input through normally open contacts of relays (1) and (5), a normally closed contact of relay (4), and said normally closed contact of relay (2); a ninth of said first outputs being connected to said first input through a normally closed contact of relay (1), a normally open contact of relay (5), a normally closed contact of relay (4), and said normAlly closed contact of relay (2); a tenth of said first outputs being connected to said first input through a normally closed contact of relay (4), a normally open contact of relay (5), and said normally open contact of relay (2); said first group of first outputs being said first, fourth, seventh and tenth outputs, said second input being connected between said normally open contact of relay (2) and said selected normally closed contact of said relay (5).