Abstract This invention relates to the application of reverting ringing to a multiparty telephone line. In accordance with the invention, the ringing selection switch automatically applies coded ringing signals to the side of the line on which the called party if located and revertive ringing signals to the other side of the line. In a preferred embodiment of the invention the ringing selection switch is a crossbar switch having horizontal and vertical paths with point of contacts with each other. Each vertical path comprises a plurality of wires, one of which having contacts for connection to the source of ringing signals and a second one of which having contacts for connection to the source of revertive ringing signals. The wires have two additional contacts which are selectively operated for connecting the source of ringing signals to one side of the line and the source of revertive ringing signals to the other side of the line.
Inventors
👤 George W Saunders
👤 Robert E Hartlen
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-27 11:36
CPC Classifications
H; H04; H04Q; H04Q5/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
89 words
An apparatus for supplying ringing signals to party line subscribers connected to opposite sides of the same telephone line comprising: a. a ringing supply comprising a source of coded ringing signals and a source of revertive ringing signals, b. a ringing selection switch connected between the ringing supply and the telephone line and adapted to selectively supply coded ringing signals to the called subscriber connected to one side of the telephone line and revertive ringing signals to the calling subscriber connected to the other side of the telephone line.
Claim 2
Independent Claim
89 words
An apparatus for supplying ringing signals to party line subscribers connected to opposite sides of the same telephone line comprising: a. a ringing supply comprising a source of coded ringing signals and a source of revertive ringing signals, b. a ringing selection switch connected between the ringing supply and the telephone line and adapted to selectively supply coded ringing signals to the called subscriber connected to one side of the telephone line and revertive ringing signals to the calling subscriber connected to the other side of the telephone line.
Claim 3
Dependent Claim
179 words
An apparatus as defined in claim 1 wherein said selection switch comprises a crossbar switch having a plurality of horizontal and vertical paths having points of contact with each other forming crosspoints and wherein each vertical path comprises, a first wire having crosspoints for connection to said source of coded ringing signals, a second wire having crosspoints for connection to said source of revertive ringing signals, a third wire, and wherein, said first, second and third wires each has corresponding additional first and second crosspoints, the third wire being connected to said source of coded ringing signals through both said first and second crosspoints of said first wire, and the horizontal path connecting said first and second crosspoints of the second and third wires being cross-connected, and connected to opposite sides of the telephone line such that the operation of either all said first or all said second crosspoints will supply coded ringing signals to the side of the telephone line to which the called party is connected and revertive ringing signals to the other side of said line.