A gear with a metallic core and a peripheral member of synthetic material connected to said core, in which said metallic core has a substantially H-shaped diametric section the legs of which are engaging inwardly extending radial portions of said peripheral member, while axis-parallel pins extend through said core and said peripheral member, one of said legs being adjustable.
A gearwheel attached to an expanded tube portion in a force-locking way, and including at least one plate metal disc member having a cylindrical hub portion on which a supporting ring is slid which has a yield strength higher than that of the tube portion, and at least one gear ring attached to the disc member.
A coil actuating apparatus in a coil spring making machine in which uniform coil springs are manufactured by alternately actuating reciprocating movement of a rack and stoppage of such movement for a predetermined period of time by rotation of a main cam through reciprocating rotation of a crank arm.
An electric power steering apparatus includes a worm wheel having an annular tooth portion made of synthetic resin and a boss portion made of metal. The annular tooth portion has teeth that engage with a worm, and the boss portion is fitted to the annular tooth portion. One of an inside peripheral surface of the annular tooth portion and an outside peripheral surface of the boss portion has concaves disposed on both axial ends thereof, and the other has convexes fitted into the concaves. The radial length of these concaves and convexes is 1 to 2.5 times as large as the axial length of the concaves and convexes.
The invention is an improved clutching means for tapping attachments and particularly adaptable in attachments having free axial float. Direct and reverse drive is provided for by way of planetary gears for driving in direct and reverse drive in the exemplary attachment in which the clutching means is embodied. An adjustment is provided for depth. Spring biased clutch drive members are provided for both the direct and reverse drive providing a narrow, neutral position. Each clutch driver member is in the form of a sleeve having a ball race carrying driving balls interposed between axial splines on a driving part and on the driven spindle. The splines have arcuate side surfaces to confrom to the driving balls providing for substantially frictionless drive in both direct and reverse modes, the balls being free to roll. The splines are especially configurated to facilitate engagement of the balls with them. In one form the splines have slanted or inclined end surfaces to achieve this purpose and in a preferred form the splines have arcuate side and end surfaces forming a continuous oval shaped track.
A bead chain sprocket is formed from a predetermined length of arcuately pocketed flexible plastic cog-like strip wherein the strip is received and affixed within the smooth peripheral groove of a flanged pulley, thereby to provide a simple, reliable and versatile mode of fabrication of such sprockets.
