The 20th century History of the anchor

hall s improved stockless anchor

in hall s improved anchor, arms , crown of cast steel in 1 piece, , shank of forged steel passes through aperture in crown secured 2 cross bolts. 2 trunnions or lugs forged lower end of shank.

byer s stockless anchor

in w.l. byer s plan, flukes , crown consist of steel-casting secured forged shank through bolt of mild steel, axis of parallel points of flukes; 1 end of bolt has head, other screwed , fitted phosphor bronze nut allow bolt withdrawn examination. palm cast on each side of crown trip flukes when anchor on ground, , bringing them snug against ship s side when weighing.

wasteneys smith s stockless anchor

wasteneys smith s anchor composed of 3 main parts, shank , crown form 1 forging, , 2 flukes or arms separate castings. bolt passes through crown of anchor, connecting flukes it; prevent flukes working off connecting through bolt, 2 smaller bolts pass though flukes @ right angles through bolt , recessed half diameter it.

small boat anchor patterns

small boat anchors have developed bit separately first half of 20th century, advent of cqr , developed geoffrey ingram taylor of scotland in 1930s. design not symmetrical, , required use of bow-roller design stow it. practical small boats , yachts, not scale in practical manner large shipping. cqr manufactured lewmar.

american richard danforth invented , developed danforth pattern in 1940s, return symmetrical concept large flat plate flukes. anchor offers holding power weight (high efficiency) not perform in other respects, meaning not general purpose anchor. original danforth still manufactured , sold tie down engineering in usa.

peter bruce of isle of man in uk developed claw-type bruce anchor in 1970s. bruce anchor co has primary role in large anchor business, producing mooring anchors , permanent installation types heavy industry, such oilrigs. on of reputation, bruce small boat anchor type successful, , represented significant improvements on cqr. no longer produced.

new generation anchors have come force since latter part of 20th century. german buegelanker features simple single flat triangular fluke, roll-bar ensure correct setting. surprisingly simple design, has proven more effective ancestors. frenchman alain poiraud developed spade anchor in 1990s, huge leap in performance on types proceeded it. spade first anchor make use of concave fluke, provides greatest efficiency (as opposed convex plow type of cqr, or flat plate type of danforth).