Mechanical sound-producing fire alarm device

Claim 1

A SOUND-PRODUCING FIRE ALARM DEVICE, COMPRISING A HOUSING, A SPRING-WOUND MOTOR MOUNTED WITHIN SAID HOUSING, SAID MOTOR INCLUDING A WINDING STEM EXTENDING THROUGH A WALL OF SAID HOUSING TO THE EXTERIOR THEREOF, A WINDING KEY SECURED ON THE END OF SAID WINDING STEM IN CLOSE PROXIMITY TO SAID HOUSING WALL, A SHAFT OPERATIVELY ASSOCIATED WITH SAID SPRING-WOUND MOTOR FOR ROTATION UPON UNWINDING OF SAID MOTOR, SAID SHAFT DISPOSED IN PARALLEL RELATION TO A WALL SECTION OF SAID HOUSING, AND STRIKING MEANS MOUNTED ON SAID SHAFT ADAPTED TO STRIKE AGAINST SAID WALL SECTION UPON ROTATION OF SAID SHAFT, SAID STRIKING MEANS INCLUDING A BAR SECURED AT SUBSTANTIALLY ITS LONGITUDINAL CENTER ON SAID SHAFT, SAID BAR BEING OF A LENGTH TO HAVE THE DISTANCE OF EACH END THEREOF FROM ITS SAID SHAFT LESS THAN THE DISTANCE FROM SAID SHAFT TO SAID WALL SECTION, AND STRIKER ELEMENTS FREELY AND SLIDABLY MOUNTED AT EACH END OF SAID BAR FOR LONGITUDINAL SLIDABLE MOVEMENT THEREON FROM A POSITION OF HAVING THE STRIKING PERIPHERY THEREOF DISPOSED AT A DISTANCE FROM SAID SHAFT NOT EXCEEDING THE DISTANCE FROM SAID WALL SECTION TO SAID SHAFT, IN ONE POSITION THEREOF, AND TO HAVE THE STRIKING PERIPHERY THEREOF DISPOSED AT A DISTANCE FROM SAID SHAFT EXCEEDING THE DISTANCE FROM SAID WALL SECTION TO SAID SHAFT IN ANOTHER POSITION THEREOF, AND COOPERATING MEANS ON SAID WINDING STEM, EXTERIORLY OF SAID HOUSING, AND AN ADJACENT PORTION OF SAID WALL FOR RECEIVING AND HOLDING A FUSIBLE ELEMENT, SAID FUSIBLE ELEMENT IMMOBILIZING SAID WINDING STEM RELATIVE TO SAID WALL SECTION, SAID COOPERATING MEANS COMPRISING AN OUTWARDLY-FACING RECESS PROVIDED ON SAID WALL EXTENDING RADIALLY RELATIVE TO SAID SHAFT, AND A COOPERATING, OPPOSITELY-FACING RECESS PROVIDED IN AN END OF SAID WINDING KEY ADAPTED TO BE DISPOSED IN REGISTER WITH SAID RECESS IN SAID WALL, SAID FUSIBLE ELEMENT HAVING A PORTION THEREOF DISPOSED IN EACH OF SAID RECESSES.