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

[10]. Centre-line adjustment for lathe headstocks, &c.

[11]. Variable curve adjustment; used in compass planes, instruments for drawing arcs of circles, &c.

[12]. Vertical shaft footstep adjustment; employed on millstones, horizontal grinding mills, &c., to regulate the space between the grinding surfaces. See [No. 261].

[Larger plate.]

[13]. Side screw adjustment for injectors, jet pumps, &c.

[14]. Levelling adjustment; can be used with either 3 or 4 screws: for telescope and level stands, theodolites, &c.

[15]. Horizontal central adjustment for footsteps, &c.

[16]. Slotted link and lock nut for adjusting angle of a lever.

[17]. Disc and ring with partial angular adjustment by a screw and nut; used for screwing dies, self-centering chucks, &c. The nut and bearing of the screw have allowance for swivelling.