The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose; by Barber Thomas Walter

Author:Barber, Thomas Walter. [from old catalog]
Language: eng
Format: epub, pdf
Tags: Mechanical movements
Publisher: New York, Spon & Chamberlain
Published: 1902-03-25T05:00:00+00:00

THE ENGINEER'S SKETCHBOOK.

1522. Plain bevil gear; shafts at right angles.

1523. Plain bevil gear; shafts at acute angles.

1524. Plain bevil gear; shafts at obtuse angle.

1525. Plain bevil gear; four shafts at right angles.

1526. Skew bevils; shafts not in line with one another.

Note. —Where the pair are both of same diameter they are called " mitre wheels."

1527. Spur wheel and pinion; to increase or decrease power and

speed the diameters can bj varied to almost any proportion.

1528. "Screw gear"; single helical gear.

1529. Skew spur wheels ; shafts not parallel.

1530. Dr. Hooke's gear. Three or more separate wheels of similar or

dissimilar piicU fixed together so as to divide the pitch and reduce backlaj^h.

1531. The same result obtained by two wheels, one fixed to shaft,

the othcir loose and forced round by a spring so as to follow the pitch of the pinion and destroy all backlash.

1532. Mortise wheel teeth.

1533. Mortise wheel teeth; another method.

Note. —Wood teeth are usually one-third thicker than the iron teeth they gear into.

1534. Pin wheel and pinion gear.

1535. Lantern wheel.

1536. Screw gear, used in place of bevil gear. Shafts at right angles;

teeth at an angle of 45°.

1537. Variable speed cone gear.

1538. Va-riable speed square gear.

1539. Variable speed oval or elliptical gear.

1540. Irregular gear.

1541. Internal or epicycloidal gear. See Nos. 550 and 1545.

Used for differential blocks, &c. Note that both wheel and pinion run in the same direction, and that more teeth are in gear at one time than with external gear as No. 1527.

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