Rotated spiral extractors are urged toward a bee board and are flexible so that they excurse and some find and enter holes in the bee board to ream out the holes. Others of the extractors which are so positioned so that they do not find holes for any given setting of the bee board merely spin against the near face of the bee boards while those extractors finding holes are pushed into the holes and retracted therefrom. Each extractor is driven by an overload clutch. The extractors are arranged in sloping rows and advancement of the bee board is in such increments that the entire face of the bee board is covered in one pass of the bee board past the extractors.

This invention provides apparatus for cleaning closely spaced electrical contact surfaces, such as, especially, telephone bank pins, which comprise longitudinally extending rods or wires which are closely spaced and which have exposed electrically conducting surfaces. The apparatus comprises a support means to which is attached a reciprocatably movable multi-digit cleaning member and drive means therefor. The fingers of the multi-digited member have an abrasive surface, such as a napped surface, and preferably also have means for wetting the napped surface with a cleaning liquid. The digits, or fingers, are so spaced on the member as to cooperatively interdigitate with the longitudinal electrical conducting means to be cleaned so as to abrade its surface, and thus clean, the longitudinal conducting element.

Controls for a sod cutter blade wherein a sod cutter machine has a blade movably mounted thereon and a linkage is connected to the blade for moving it into and out of the sod being cut into desired lengths of strips. The blade linkage is disposed in a parallelogram arrangement, and a motor is on the machine and actuates the blade, and the machine includes a measuring wheel connected to an electric system which in turn is connected to the motor for cyclically driving the blade. A control mechanism, in the form of a cam and a cam follower and a pivot arm, is interposed between the linkage and the motor control switch, such that the motor and the linkage make one cycle with each cut, and the entire mechanism is re-set to a starting position without ending in a dead center or other undesirable position.

A lawn treatment apparatus includes an open-bottomed support body having three treatment implements in the form of spiking devices or brushing/sweeping devices adapted to move through the open bottom. The support body carries a driving mechanism to drive the treatment implements with a combination of vertical and horizontal oscillations. A biasing mechanism is provided normally to hold the implement in a vertical attitude or substantially so when stationary.