Abstract: A rotary-to-linear motion converter comprising a frame having a roll axis, and a pitch axis passing through a common point. The axes are mutually orthogonal. The common point is positioned between an input end and an output end. An input shaft rotates on the roll axis and has an offset drive cam on its interior end. The offset drive cam has a central point positioned at the frame common point. A rocker housing has a pitch axis and a yaw axis. The pitch axis and yaw axis are mutually orthogonal and pass through a common reference point. Pitch bearings mount the rocker housing pitch axis for rotation on the frame pitch axis and position the rocker housing common reference point to be coincident with the frame common point. A rocker cam means rotates the rocker housing yaw axis and couples rotary motion from the offset drive cam into oscillatory rocker housing pitch motion. An output shaft is slidably coupled to the frame.

Abstract: A powder dispensing brush for use in dispensing medicated powders or flea control powder onto the body of a pet comprises a hollow elongate handle provided with an end opening closed by a snap-lock closure through which the powder is inserted into the handle interior. The handle itself is formed to provide a grasping surface over one longitudinal segment thereof and an applicator segment on the remainder of its structure. Formed on one lateral surface of the applicator segment are a plurality of conical projections each provided with a central vertical port communicating with the interior cavity of the handle. It is through these ports that powder deposited in the handle is dispensed onto the skin of the animal. In order to control the flow rate of the powder there is further included inside the handle a sliding plate provided with a plurality of openings disposed to align, along one point of the sliding stroke with the ports in the projection.