Chapter CXLVIII: Section 84: Toothed Gearing
(_See also p. 186._)
=2493. Circular rack= (revolving) and sector, used on governors.
=2494. Skew worm and wheel gear.=
=2495. Oval gear,= linked together.
=2496. Mitre gear,= angle of shafts variable. The two bearings are hinged together on the pitch line of the pair of wheels.
=2497. Wood-faced spur gear,= to run with the wood faces in contact for quietness. The wood faces are renewable, like mortise teeth. See Nos. 1352 and 1353.
=2498. Elastic spur gear,= to prevent backlash.
=2499. Bevil gear,= with roller teeth in one wheel of the pair.
=2500. Circular rack and pinion gear.= The rack can revolve independently of the vertical movement.
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The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purposeChapter CXLVIII: Section 84: Toothed Gearing
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