In re Carr

ROBB, Associate Justice.

Appeal from a decision of the Patent Office refusing to allow 17 claims for patent, some of which were for a method and others for an apparatus for tamping newly laid concrete, so as to compact it.

The machine employed is power-driven and provided with a transversely extending tamping bar yieldingly suspended from the frame of the carriage by means of stiff leaf springs. The bar is given rapid vertical vibratory movements by means of an eccentrically weighted section of the flexible power-driven shaft. The function of the downward movement of the bar is to compact the…