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

Section 80.—SPRINGS.

(See also [p. 178].)

[2479]. Wooden springs of lance wood or ash.

[2480]. Carriage spring, with splayed link suspension. This improves the play and action of the spring over the vertical method.

[2481]. Duplex compression spring. The two springs are coiled opposite ways.

[2482]. Equalising lever to distribute the load on two car springs.

[2483]. Double-ended volute spring for compression.

[2484]. Spring band.

Spring piston rings. See [Section 58].

[2485]. Conoidal spiral spring.

[2486]. Adjustable spiral spring. A washer on top has four vanes below it drilled with holes to suit the diameter and pitch of the spring wire, which, being threaded through the vanes, is rendered inactive, so far as it is held by the vanes. This appliance, therefore, is used to shorten or lengthen the live or active part of a spiral spring.

[Larger plate.]