Direct key calling telephone station having binary converting means

Claim 1

A KEY CALLING TELEPHONE STATION FOR CALLING ANY ONE OF A PLURALITY OTHER STATIONS WITH EACH STATION HAVING A DECIMAL CALL NUMBER INCLUDING A PLURALITY OF INDIVIDUALLY MANUALLY OPERABLE NORMALLY OPEN KEYS EACH REPRESENTATIVE OF A DECIMAL NUMBER, MEANS INTERCONNECTING THE KEYS TO THREE WIRES TO PRODUCE A BINARY NOTATION IN SAID WIRES REPRESENTATIVE OF THE DEMICAL NUMBER OF THE KEY OPERATED, A FIRST RELAY TREE AND A SECOND RELAY TREE, EACH OF SAID TREES BEING CONSTRUCTED AND ARRANGED TO CONVERT A BINARY NOTATION INTO A DECIMAL NUMBER AND HAVING A FIRST, SECOND AND THIRD RELAY, MEANS INTERCONNECTING THE TWO TREES IN SERIES WITH THERE BEING AN OUTPUT LINE FOR EACH DECIMAL CALL NUMBER AND AN INPUT, MEANS FOR CONNECTING THE THREE WIRES WITH EACH WIRE BEING CONNECTED TO ONLY ONE OF THE RELAYS OF SAID FIRST TREE TO EFFECT A CHANGE THEREIN REPRESENTATIVE OF THE BINARY NOTATION CARRIED BY THE WIRES CAUSED BY OPERATION OF A FIRST KEY, MEANS FOR SHIFTING THE CONNECTION OF THE THREE WIRES TO THE SECOND TREE TO EFFECT A CHANGE THEREIN REPRESENTATIVE OF THE BINARY NOTATION CARRIED BY THE WIRES CAUSED BY OPERATION OF THE SECOND KEY, SAID MEANS CAUSING CONNECTION OF ONE WIRE TO ONE RELAY OF THE SECOND RELAY TREE, TELEPHONE MEANS INCLUDING AN INFORMATION LINE CONNECTED TO THE INPUT OF SAID TREES AND ADAPTED TO BE CONNECTED THROUHG THE TREES TO THE OUTPUT LINE OF THE DECIMAL NUMBERED STATION DETERMINED BY OPERATION OF THE KEYS.