Automatic telephone call device

Claim 1

AN AUTOMATIC TELEPHONE CALL DEVICE FOR AUTOMATICALLY CALLING A REQUESTED SUBSCRIBER''S TELEPHONE APPARATUS BY MEANS OF A CALL KEY CONSITUTED BY A SUPPORT PLATE CARRYING, GROUPED IN TRANSVERSE SERIES SUCCEEDING ONE ANOTHER LONGITUDINALLY, CHARACTERISTIC SIGNS OF THE CALL-NUMBER OF THE APPARATUS TO BE CALLED, ONE OF THE TWO LONGITUDINAL EDGES OF SAID PLATE BEING PROVIDED WITH RETAINING TEETH, SAID CALL DEVICE COMPRISING: YIELDING EXPELLING MEANS FOR PRODUCING AN EXPELLING FORCE ON ANY CALL KEY INTRODUCED IN THE DEVICE; RETAINING MEANS FOR COOPERATING WITH THE RETAINING TEETH OF THE KEY; A SWEEPING LEVER FOR CONTROLLING SAID RETAINING MEANS, EXPLORING THE SURFACE OF THE KEY, CARRYING DETECTING MEANS AND FOR TRANSLATING CALL SIGNALS CORRESPONDING TO THE CHARACTERISTIC SIGNS OF THE CALL-NUMBER; A ROTATORY CONTROL CAM ACTING ON SAID SWEEPING LEVER FOR OSCILLATING THE LATTER; AND ELECTRIC MOTOR OPERATIVELY CONNECTED TO SAID CAM FOR ROTATING THE LATTER; SWITCHING MEANS FOR SAID MOTOR AND ADAPTED TO BE CONTROLLED BY THE KEY; A PIVOTING CONTROL LEVER FOR ACTUATING SAID SWITCHING MEANS; A CONTROL DISC OPERATIVELY CONNECTED TO SAID ELECTRIC MOTOR FOR ACTUATING SAID CONTROL LEVER; TRANSMISSION MEANS INSERTED BETWEEN THE MOTOR AND THE CONTROL DISC AND COMPRISING A GEAR WHEEL OPERATIVELY CONNECTED TO THE MOTOR AND COAXIAL WITH SAID DISC; AND SPRING MEANS FOR OPERATIVELY AND YIELDINGLY CONNECTING, WITH A ROTATORY CLEARANCE, SAID GEAR WHEEL AND SAID DISC.