US1636092A - Anchor - Google Patents

Description

M. W. HALL ANCHOR Filed Feb. 2. 1924 July 19, 1927.

INVENTOR fp/Kme ATTORNEY Patented July 19 192.7.

umm-w. nur., or Naw accuenta, Naw von.

manon.

Appnuamn mea February 2, 1924. semina. 390,111.

This invention relates to anchors for ships use, and my improvements are directed to ,that type of anchorl having pivotal fiukes. Usually, with this type of anchor the flukes are crowned with an abutment structure Cul which 'engages the surface the flukes are\in 4tended to penetrate, and thereby limits the degree to which the iiukes can dig into the sand, mud or other bottom.

It is an object of my invention to entirely avoid this objection. 'j The lukes of my improved anchor -are designed to present a broad, flat, plane surface, with as little abutmentv or resistance effect as possible, the whole forward sides of the flukes being refined down to a' relatively keen sharp cutting edge to enhan'c'ethe penetrating qualities; the shank also is given a relatively broad fiat section, havmg its greatest thickness longitudinally along its center line, andtapering vertically each way to a cutting edge, the object lbeing lto reduce shank resistance to a minimum.

A further peculiarity of design is in the` construction of the pivot by which the liukes are attached to the shank, the shank beingI provided at. each side with a trunnion or transverse bearing pin, constructed integral with the shank, and upon which the ukes are pivotally supported, 'the object of -this arrangementv being to provide a suitable length of bearing to insure and preserve a central alignment of the shank .with the flukes.

In order to fully realize the maximum holding value in this type of anchor, itl is not alone suiicient to reduce the penetrating resistance to a minimum, but provisions must be made to eliminate an inherent defeet characteristic of the double pivoted fluke type of anchor, such defect being the liability of rolling over and breaking out under dragging conditions.

Some of the contributing auses for this peculiarity of action are.:

1st. Unel ual earthA resistance,.c ausing one iuke to u down faster than the other.

2nd. on-alignment of shank with iiukes,

giving greater leverage to one fluke over` that of the other.

3rd. Shank resistance at the center line` of anchor, producing a -fulcrum eect upon which the anchor finds support for its roll'- in action.

o 'cure the anchor of theseA critical delfacts, the following provisions have been made. Correct alignment of the shank is msured b the peculiar arran ement of pivotal bearlng for shank and ukes.

The shank-resistance at the center line of anchor has been reduced to a minimum, eliminating the fulcrum effect upon which the anchor found support for its rolling ac- Neutralizing the unequal earth resistance Ais achieved by using twoy widely separated trip members, placed near the outer sides of thefiukes, and serving as stabilizers'by introducing avbalancing resistance when either fluke tends to advance downward ahead of the other.

Anchors of the double pivoted fluke type have also proven deficient when it was found imperative to lay at short scope of the cable. All vessels lying at anchor with even a moderate wind blowing, have a perpetual yawing motion from side to side. This` motion is transmitted through the cable to the anchor and produces a similar swaying from side to s1 e.

Owing to the fact that these anchors have two ukes hooked into the bottom, they cannot pivot readily upon the lukes as they sway from side to side, and in consequence the swaying motion causes them to break out and drag.4

- This deficiency is almost wholl eliminated or neutralized in my improve anchor, by the use of the .thin wide shank, which buries down deep in the mud. When t-he anchor hooks in, this broad shank provides a suitable resistance to absorb the swaying action of the vessel without disturbing the anchor, or causing it to break outand drag. V.Other featuresl and advantages of my invention will hereinafter appear.

In the drawing:

' Figure 1 is a plan view of my improved anchor` partly broken away, with the ilukes.

prone.

Fig. 2' is a partial side view thereof showin Ya ilukeangled as in operation.

ig. 3 is a section on theline 3-3 on Fig. -1, and i Fig.4 4 is a 'section on the line 1r-4 of Fig. 2.

In said views let 1 indicate the shank, having at its free end a ring oreyelet 2 for engaement by a cable, and let 3, 4, respectively 1n icate trunnions which extend from op osite sides of the shank, at its other end. he flakes 5 and 6 are alike and each has in its with aligned bolt holes to receive a bolt 11' that passes through a .spacer 12, which carries a terminal trip line ring 13.

The spacer 12 1s an angular member having the forward surfaces 14, which co-act with the end 15 of shank 1, and serve as stops, to limit the degree of angular move#- ment of the iukes, the spacer being rigidly connected `to the flukes by reason of bolt 9 passing therethrough. A

Lateral equalizing means for the anchor, to prevent rolling action thereof and to cause its flukes to both enter the sand or mud bottom in operation, are here shown as a pair of angle members each having a web 16 and ange 17. The angle members are mounted by their webs upon the bolt 9, respectively near the ends thereof, to be thus Widely spaced apart, their webs butting against the opposite ends of the bearing portions of the fiukes about the bearing openings8, being secured by the bolt head 18 and nut 19. The flanges 17 lie transversely of the flukes, and are of sufficient length to serve their purpose, which, as stated, is that of stablizing the iukes, by preventing the anchor from turning unduly about its longitudinal axis, to cause greater engagement by one fluke than by the other.

The iuke bearing portions are recessed at 20 to accommodate the angle members, also the bolt head and nut, and the Webs 16 have each a saddle-like recess 21, to fit over the bearing portions 22, whereby the angle members become rigidly engaged with the flukes.

It will be noted that the shank 1 is relatively broad in aiplane perpendicular to the axis of its trunnions, is transversely narsee Fig. 4) while the flukes (see Fig. 3 are relatively narrow in a plane per pendicularvto the -same axis, and transversely broad. The shank tapers toward its opposite edges 23, and the flukes taper toward their opposite edges 24. By these means strength of the shank and fiukes is provided, and they are each enabled to rea'dily cut into the sand or mud bottom, from either side.

It will also be noted that the flukes are headless, the lines of their bearing portions merging into the blade lines with a tapering effect, without providing any transverse abutment such as would tend to retard the entry of the flukes. into the sand or Inud bottom.

Variations within the spirit and scope of my invention are equally comprehended by the foregoing disclosure.

I claim:

1. The combination, in an anchor, of a shank that is relatively broad in height and narrow in width throughout its length, said shank being tapered to cutting edges at both sides of its height, and iiukes pivoted to MILAN W. HALL.

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