Abstract: A protractor-type hatching control device having a base segment (leg) cooperable with a straight-edge or the like movably mounted on a drawing board, including an adjustable hatching segment (leg) having a drawing-edge for controlling a drawing instrument (pen or pencil), and pivotally-connected to the base segment for setting to different angles at will for establishing angularity of the hatching; or line-spacer (indexer) carried by the adjustable segment, and settable at will to differently spaced positions relatively to the drawing-edge for uniformly controlling the selected spacing between the hatching drawn by said instrument in working contact with the drawing-edge; a knurled knob threaded on a stem defines the pivotal connection, for locking the hatching segment and line-spacer in their adjusted positions, and release of the know accommodates setting of the line-spacer and/or adjustable segment according to the desired line spacing and angle, respectively; and a provision for knife-like closing of the

Abstract: A drum-type brake adaptive to front and rear-axle constructions on motorized vehicular equipment, in which braking torques are developed by one or more radially-operating caliper units positioned around the circumference of an open brake drum co-rotatable with the vehicle road wheel. The caliper unit comprises an inner and an outer segmental brake shoe which carry detachable linings, respectively, in spaced confronting relationship that straddle-mount the drum's flange to apply braking forces to opposite faces, respectively, thereof, and reciprocative mechanism including a pair of interengaging push-pull members projecting from the brake shoes, respectively, and slidably installed along the radius of the drum's backing plate.