Abstract: An apparatus for measuring tension in cables or chains comprises a unitary structure which may be entirely formed by welding and bending operations. An elongated resiliently deformable rod has its opposed ends bent laterally in opposite directions into hook-shaped formations to engage a section of a cable in which the tension is to be measured, causing the cable to assume a non-linear, generally helical configuration when the apparatus is assembled thereto. An adjustable height pad may be attached to the center of the bar to engage the cable and increase its helical angle. An indicator bar, having indications provided thereon, is disposed in generally radial relationship to the rod adjacent one end thereof. A cantilever pointer has one end welded to the rod remote from the indicating bar and the pointed end disposed adjacent the indicating bar.

Abstract: A tubular cylinder block is mounted for rotation about its axis within a cylindrical bore of a pump housing. The pump housing has circumferentially spaced inlet and outlet ports opening radially to the bore. Right angle intersecting diametric passages extend through the cylinder block and are alignable with the inlet and outlet ports during rotation of the drive block, the diametric passages being square in cross-section, and piston members of corresponding square transverse cross-section are slidably positioned within respective diametric passages with the piston members bearing square slots within side faces thereof intermediate of their ends facing axially. A square drive block is carried commonly within the piston member slot whose axis of rotation is adjusted eccentrically relative to the axis of rotation of the cylinder block. Cylinder block internal peripheral grooves separated by lands control fluid passage via the piston formed cavities between the inlet and outlet ports.