PART I.
SECTIONS 1–106.
(For Additions see pages 245-335.)
Section 1.—ANCHORING.
1. Rope pulley anchor—a car which grips by sinking its wheels in the soil; employed for ploughing tackle.
2. Anchor plate—buried in the ground below a mass of masonry—for attaching guys, tie rods, &c. Sometimes a frame, or plate, laid on the ground and ballasted, is the method used.
3. Screw mooring, screwed into the ground.
4. Heavy stone sunk in the ground and having a ring attached; or a mass of concrete, similarly placed, used for guy ropes, tie rods, and foundation bolt attachments.
5. Grapnel.
6. Mushroom anchor.
7. Double fluke anchor.
8. Martin’s patent anchor, with swivelling flukes. Several other patent anchors are modifications of this.
Stakes, with or without flanges, vertical or horizontal, are sometimes employed, the flanges taking the cross strain of the ties, &c. Fencing posts, gate posts, tree stakes, and tennis poles are of this class.
Section 2.—ADJUSTING DEVICES.
For adjustment by Screws, see Section 78, and by Wedges, see Section 36, These are the commonest appliances employed. For Cams also, see Section 9. For adjusting Pedestal Brasses, see Section 46.
For adjustments by keys, cotters, &c., see Section 37. See also Nos. 251, 269, and 297.
9. Split cone sleeves and set screw adjustment for a revolving standard, or similar detail, where there is much wear or great accuracy is required in the revolving bearing.
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.