Apparatus for abrading by vibratory flowing of the abrading material

Claim 1

A HIGH FREQUENCY VIBRATORY TYPE ABRADING MACHINE FOR ABRADING FRIABLE AS WELL AS NON-FRIABLE MATERIALS IN A GRANULAR MASS OF ABRADING MATERIAL WHICH CONSISTS OF A FRAME HAVING A FRONT AND BACK, A MATERIAL CONTAINER SECURED ON SAID FRAME AND HAVING A CHAMBER WITH SMOOTH INNER SURFACES ON THE BOTTOM AND FRONT AND SIDES WHICH RETAINS THE MATERIAL THEREIN DURING ABRADING OPERATION, A REACTION BASE MOUNTED ON ISOLATORS, TUNED STRAIGHT SPRINGS EACH HAVING ONE END SECURED TO SAID REACTION BASE AND THEIR OTHER END SECURED TO SAID FRAME TO SUPPORT SAID CONTAINER FOR RECIPROCATION IN A SINGLE PLANE, AN ELECTROMAGNET HAVING ITS ARMATURE MOUNTED ON SAID FRAME AND ITS ELECTROMAGNETIC FIELD MEMBER MOUNTED ON SAID REACTION BASE TO HOLD THE SAME IN OPERATIVE SPACED RELATION WITH SAID ARMATURE AND WHEN ENERGIZED TO FEED BY VIBRATORY RECIPROCATION SAID MATERIAL ONE DIRECTION AGAINST SAID FRONT OF SAID CHAMBER WHERE IT FLOWS UP AND BACK OVER ITSELF IN AN ENDLESS PATH, SAID FRAME AND SXAID MATERIAL-LOADED CONTAINER AND SAID REACTION BASE AND SAID TUNED STRAIGHT SPRINGS MAKING UP A TUNED VIBRATORY SYSTEM THE NATURAL PERIOD OF VIBRATION OF WHICH IS A SELECTED FREQUENCY CLOSE BUT NOT IN RESONANCE WITH THE FREQUENCY OF THE ALTERNATING CURRENT TO ENERGIZE SAID ELECTROMAGNET AND RECIPROCATE SAID MATERIAL-LOADED CONTAINER AT A HIGH FREQUENCY TO PRODUCE A FEEDING ACTION AND FEED THE MATERIAL IN ONE DIRECTION AGAINST SAID FRONT WALL OF SAID CONTAINER WHERE IT FLOWS UP AND BACK OVER ITSELF IN A CONTINUOUS PATH WITHIN THE SMOOTH SURFACED CHAMBER OF SAID CONTAINER TO PERMIT THE ABRADING MATERIAL TO ABRAE FRIABLE AS WELL AS NONFRIABLE MATERIAL IN THE GRANULAR MASS OF ABRADING MATERIAL.