Fuse and disconnect device for manual or thermal operation

Claim 1

IN FUSE AND DISCONNECT APPARATUS, IN COMBINATION, A BUSHING COMPOSED OF INSULATING MATERIAL AND HAVING AN AXIAL BORE THERETHROUGH, THE BUSHING HAVING ELECTRICAL CONTACT MEANS AT ONE END THEREOF, A PAWL DISPOSED AT THE OTHER END OF THE BUSHING, A TUBULAR STRUCTURE COMPOSED AT LEAST PARTIALLY OF INSULATING MATERIAL SLIDABLY DISPOSED IN THE BORE IN THE BUSHING AND CARRYING OTHER CONTACT MEANS AT ONE END THEREOF WHICH MAKES ELECTRICAL CONNECTION WITH THE CONTACT MEANS ON THE BUSHING WHILE THE TUBULAR STRUCTURE IS IN THE BORE IN THE BUSHING, THE TUBULAR STRUCTURE HAVING A PLURALITY OF THREADS ON THE OUTER SURFACE THEREOF AT THE OTHER END THEREOF ADAPTED TO BE ENGAGED BY SAID PAWL, CONNECTING ROD MEANS COMPOSED OF CONDUCTIVE MATERIAL SLIDABLY DISPOSED IN THE TUBULAR STRUCTURE, FIRST COUPLING MEANS ON THE CONNECTING ROD MEANS, THE TUBULAR STRUCTURE INCLUDING SECOND COUPLING MEANS, THE FIRST AND SECOND COUPLING MEANS ENGAGING EACH OTHER WHILE THE TUBULAR STRUCTURE AND CONNECTING ROD MEANS HAVE A PREDETERMINED AXIAL RELATIONSHIP WITH RESPECT TO EACH OTHER FOR TRANSMITTING ROTARY MOTION FROM THE CONNECTING ROD MEANS TO THE TUBULAR STRUCTURE, AND A FUSE ELEMENT EXTENDING BETWEEN THE OTHER CONTACT MEANS AND THE ADJACENT END OF THE CONNECTING ROD MEANS, SAID THREADS BEING SLIDABLE PAST THE PAWL WHEN THE TUBULAR STRUCTURE IS INSERTED IN THE BORE IN THE BUSHING, THE PAWL ENGAGING THE THREADS WHEN THE TUBULAR STRUCTURE IS BEING WITHDRAWN FROM THE BORE IN THE BUSHING WHEREBY THE TUBULAR STRUCTURE MUST BE TURNED TO PERMIT MOVEMENT OF THE THREADS PAST THE PAWL.