A isa triangular slotted blade, having a reduced shank, impossible for the gases, even under any pressure which which is suitably attached to a V-shaped clamp, by which might be generated in the drain pipes, to make their way the device is easily and firmly secured to the edge of a ta- back through… … brush handle by its centrally per- latter, so that it clears the pin on being released without be- forated yoke part, B, until it is ing thrown back too far and thus impairing the efficiency of seated at the base of the same on its spring. the brisi e ferrule. The yoke, B, Patented through the…
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