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 Thomas Walter Barber

[1464]. Double volute chair spring.

[1465]. Spindle-shaped open or close spiral spring for tension.

[1466]. Parallel open or close spiral spring with coned ends.

[1467] & [1468]. Volute springs.

[Larger plate.]

[1469]. Torsional spiral spring.

[1470]. Wire staple torsional spiral spring, used for hinging; the ends of the wire are bent at a right angle and driven into the wood.

[1471]. Fixed spring.

[1472] & [1473]. Sear springs.