Vibrator mechanism

Claim 1

A VIBRATOR MECHANISM FOR USE ON FORMS FOR CASTING CONCRETE SLABS, SAID MECHANISM COMPRISING A RIGID STEEL BASE PLATE, A PLURALITY OF UPSTANDING STEEL SUPPORTS RIGIDLY SECURED TO SAID BASE PLATE AND FORMING A RIGID SUPPORT STRUCTURE, SAID SUPPORT STRUCTURE HAVING AT THE TOP THEREOF A PLURALITY OF APERTURED STEEL PLATE PORTIONS, A VERTICAL STEEL PIN FOR EACH APERTURE, EACH PIN HAVING A GUIDE PORTION EXTENDING ABOVE THE TOP OF SAID SUPPORT STRUCTURE, A HEAVY WASHER OF NON-METALLIC ELASTIC VIBRATION ABSORBING MATERIAL DISPOSED ABOUT THE GUIDE PORTION OF EACH PIN AND RESTING ON TOP OF THE SUPPORT STRUCTURE, AN INVERTED CUP SHAPED STEEL MEMBER DISPOSED OVER THE TOP OF SAID HEAVY WASHER, SAID INVERTED CUP SHAPED MEMBER HAVING AN UPWARDLY EXTENDING PIN PORTION, A STEEL VIBRATOR PLATE DISPOSED OVER THE SUPPORT STRUCTURE, SAID VIBRATOR PLATE HAVING APERTURES EACH OF WHICH REGISTERS WITH THE UPWARDLY EXTENDING LAST NAMED PIN PORTION, MEANS ON THE TOP FACE OF SAID VIBRATOR PLATE FOR RETAINING A CASTING FORM AGAINST LATERAL MOVEMENT IN NORMAL VIBRATING POSITION AND MEANS SUPPORTED FROM THE BOTTOM OF SAID VIBRATOR PLATE FOR CREATING VIBRATIONS IN SAID PLATE, SAID HEAVY WASHERS SERVING TO SUBSTANTIALLY SUPPRESS THE TRANSMISSION OF VIBRATORY ENERGY TO THE SUPPORT STRUCTURE.