Chapter XXXII: Section 39: GUIDES, SLIDES, &c

PISTON-ROD GUIDES.

=672. Two bars and crosshead;= these must be far enough apart to allow for the angle of the connecting rod.

=673. Four bars, crosshead, and slide blocks;= the connecting rod working between the two pairs of guides. The bottom guides are often cast solid with the bedplate.

=674. Bar and slipper.=

=675. Adjustable slipper;= there are other adjustments for wear by wedge pieces, similar to No. 19. See also No. 21.

A plain guide bush is sometimes used as No. 682, and a forked
connecting rod with long fork coupled to the gudgeon or crosshead.

=676. Section of No. 673 and alternative crosshead= for two round bar guides.

=677. Slide bed and slipper.=

=678. Section of trunk guide,= cast with engine bed and bored out.

=679. Oscillating cylinder piston head guides.=

=680. Oscillating fulcrum= in lieu of guides.

=681. Diagonal crosshead and guide bars,= to allow the crank and connecting rod end to pass the guide bars.

VALVE ROD GUIDES.

=682, 683, 684, & 685.=

GUIDE ROLLERS.

=686 & 687. Guide rollers= for ropes, &c.

=688 & 689. Guide rollers= for bars of various sections.

LIFT AND HOIST GUIDES.

=690. Cage guided by four corner posts.=

=691 & 692. Cage runs on two vertical rails,= and is steadied by a third guide. For large cages. Small cages only require guides on one side, as 692.

=693. Iron wire or rod guides,= strained tight, are sometimes used, especially in mines, as guides for the cage; two are used to guide the cage and two for the balance weight.

=694. Planished round iron guides,= with half round fixing brackets and runners attached to cage; these guides are equal to planed bars and much less costly; two are usually sufficient for any cage.

=695. ~T~ ~L~ or ⊔ iron guides,= for goods lifts.

=696. Wire rope guides,= with separate pair of wood guides for balance weight.

=697. Intermediate guides= for double cage lifts; for large cages extra guides at each side should be used.

=698. Sloping carriage guides.=

=699. Vertical bracket cage guides.=

MACHINE GUIDE BEDS.

=700. Double ~V~ bed,= with set screw adjustments.

=701. Guide bed= for planing machine, or any machine where the bed is not liable to lift in working.

=702. Round bar and flat guide bed.=

=703. Deep ~V~ guide;= much used for crossheads, tool boxes, &c., requiring accurate movement.

=704. Lathe bed= with square guides and adjustments for wear.

=705. Planing machine,= double ~V~ bed.

=706. Crosshead= for two single bar guides, with renewable wearing strips and square guide surfaces.

=707. Radial slide= for tool box, usually of same section as No. 700.

ROPE GUIDES.

708, 709, & 710; in 709 the rope can be threaded without passing the
end through.