US2687106A

US2687106A - Snug stowing anchor

Info

Publication number: US2687106A
Application number: US219842A
Authority: US
Inventors: Linnenbank Donald; Fred B Money; Jr Dwight P Noel
Original assignee: Boston Metals Co
Current assignee: Boston Metals Co
Priority date: 1951-04-07
Filing date: 1951-04-07
Publication date: 1954-08-24
Anticipated expiration: 1971-08-24

Description

Aug 245 1954 D. LINNENBANK ET AL SNUG STOWING ANCHOR oww/:4T

. ATTYS Patented Aug. 24, 1954 SNUG STOWING AN CHR Donald Linnenbank, Chester, Pa., Fred B. Money,

Thorcfare, N. J., and Dwight P. Noel, Jr., Crum f Lynne, Pa., assignors to The Boston Metals Company, Chester, Pa., a corporation of Maryland Application April 7, 1951, Serial No. 219,842

This invention relates to a ships anchor of the stockless type consisting primarily of two members, that is, a shank member and a crown and fluke member. The latter is designed to lie flat against the hull of a ship when the shank is drawn up into the hawse pipe. For this purpose the crown and nuke member is substantially the combination of a flat slab which tapers gradually in thickness `from its rear end forward to the tips ofthe flukes with a head portion which projects symmetrically in both directions from the plane of the flukes, each such projection being adapted to enter the mouth of the hawse pipe so that the iiukes can lie fiat against the hull, there being no other projections out of the plane of the nukes. At the base or rear end of the ilukes are two aligned, laterally projecting stabilizing arms which are integral with and in the same plane as the corresponding flukes. The head portion of the crown and fluke member contains a socket in which is received a ballv formed at the rear end of the shank. The head portion also has a slot which is forward of and narrower than the socket, but is a little wider than the portion of the shank adjacent to the ball. This permits relative rocking movement between the shank and the crown and fluke member, The side faces of the shank are preferably plane, but the upper and lower faces are rounded,` preferably having a curvature equal to that of a cross-section of the hawse pipe, The ends, of the slot in the head are concaved correspondingly to be fitted by a rounded face portion of the shank when the crown and fluke member is rocked with respect to the shank to its limit in either direction. The portions of the head which project from the plane of the flukes serve as tripping scoops to dig into the ground and thus to cause the crown and fluke members to rockas the anchor is dragged along the ground, thus `causing the points of the lukes to dig into the ground so as to bury the iiukes.

For a more complete understanding of the invention, reference may be had to the following description thereof and to the drawing, of which- Figure l is a perspective view of an anchor embodying the invention;

Figure 2 is a sectional view on the line 2-2 of Figure 1;

Figure 3 is an elevational view of the anchor held in an upright position with the shank and nukes in a common plane;

Figure 4 is a section on the line 4-4 of Figure 3;

Figure 5 is an elevational View of a portion 1 Claim. (Cl. Illia-208) of a hull showing the anchor stowed in place;

Figure 6 is a fragmentary `sectional view of the hull shown in Figure 5 and the anchor stowed in the hawse pipe; and

Figure 7 is a sectional view on the line 1--1 of Figure 6'.

The anchor illustrated on the drawing is of the stockless type consisting of two major members which are rockably connected together. One of these members consists of a Yshank I0, the othermeinber being a unitary crown and fluke member comprising two lukes l2 and I6 extending forward from tripping head portions it, and laterally projecting

arms

20 and 22 to stabilize the anchor. The lukes l2 and IE with their respective `arms 2i! and 22 lie in a common plane and constitute a slab which tapers gradualiy in thickness from a maximum at the rear end or base of the flukes forward to the tips of the flukes. The arms E@ and 22 are preferably in the same straight line and project beyond the outer edge of the rlukes so as to prevent the anchor from rolling over on the axis of the shank when it is dragged along the bottom. The head portion i8 projects in both directions from the plane of the fiukes and arms, these two projections being the only portions of the crown and fluke member projecting from such plane. The head portions IB are located at the base of the dukes and between the arms 2i) and 22 `which extend in opposite directions therefrom. r1`he tripping head is hollow and contains a socket 24 which is shaped to receive a ball 26 formed on the rear end of the shank l). Communicating with and forward of the socket 2li is a slot 28 in the head i8, this slot being narrower than the socket 2t but slightly wider than the portion of the shank It which is adjacent to the ball 2t as indicated in Figures 3 and Li. The ball 2S and the socket 2li form a ball and socket joint which permits the crown and iluke member to rock through a limited angle with respect to the shank Iii so that the shank can extend at an angle of approximately 45 to the plane of the fiukes, on either side of such plane. Thev limit of such relative rocking movement is `determined by the end walls 32 and 34 of the slot 23, these end walls being engaged by the shank lil when the latter has swung to one or the other of its limiting positions. The shank preferably has a cross section such as is illustrated on Figure 2, with straight sides 36, 3B and rounded top and bottom faces iii] and i2. The corner edges i4 of the shank are rounded oif with a greater curvature than the top and bottom faces 'i0 and 42.

I The curvature of the top and bottom faces is preferably equal to the curvature of a cross section of the hawse pipe 46 into which the anchor is intended to be drawn when not in use. When an anchor which is attached to a chain cable is being raised, the planes of the successive links are at right angles to each other so that as the chain cable is drawn through the hawse pipe, the planes of the links are inclined with respect to the surface of the hawse pipe with which the links are in actual contact. This means that when the shackle 48 at the forward end of the shank I reaches the hawse pipe, the anchor is turned about 45 from the angular position the shank will assume when the anchor has been drawn up into the pipe. Thus the anchor must turn itself through an angle of 45 while the shank is being drawn into the hawse pipe. The curvature of the top and bottom faces 40 and 42 of the shank, as well as the rounded edges 44, facilitate this turning movement of the anchor about the axis of its shank as it is drawn into the hawse pipe.

The curvature of the top and bottom faces of the portion of the shank which is adjacent to the ball 26 is also useful in tending to prevent cocking of the shank when the shank is rocked to one of its limiting portions. For this purpose the end walls 32 and 34 of the slot 28 are concaved with a curvature similar to that of the shank surfaces by which they may be engaged. The

convex shank surface tting into a corresponding concave end wall of the slot tends to maintain the shank in a plane perpendicular to the

arms

26 and 22 when the shank engages one or the other of the end walls of the slot.

The head portions I8 which extend from the plane of the ukes and arms are of somewhat irregular shape but each such portion has a substantially semicircular contour outline when projected on a plane which is perpendicular to the axis of the shank I 9 when the shank is in one or the other of its limiting positions. Such contour is shown in Figure 7, the curvature being such that one of the head portions I8 will t snugly into half of the circumference of the hawse pipe when the anchor is stowed therein. This, together with the shank and adjacent portion of the flukes, effectively blocks the hawse pipe so as to prevent sea water from surging up through the pipe when the bow of the Vessel dips into Waves. Since the head portions are of such a size and shape that either can enter the hawse pipe, the flukes and arms can be drawn up against the hull so as to lie flat against it and present a minimum of surface to water, ice, i'lotsam, or the like which may be cast against the bows of the vessel. When one head portion is within the hawse pipe, the Aother one necessarily projects outward from the plane of the flukes, but this outwardly projecting head portion presents a somewhat spherical surface outward and is the only portion of the `anchor projecting from the plane of the flukes.

The socket 24 opens to the rear of the anchor so as to receive the shank when the members are 4 to be assembled. When the ball has been fitted in the socket a retaining pin 50 is mounted to the rear thereof, this pin passing through a pair of .

ears

52 and 54 which project rearward of the head portion I8. In order to provide additional facial area for the flukes and also to reduce the weight of the anchor, the head projections are relieved as at 56.

While the ratios of the various dimensions of the anchor may vary to some degree, it is preferred that the extreme width of the anchor, that is, the distance between the extremities of the arms ZE! and 22 be about 92% of the shank length, and that the maximum transverse dimension of the head portions I8, which appears as the vertical height of the illustration in Figure 4 of the drawing, be about 35% of the shank length. The thickness of the slab portion of the crown and fluke member preferably tapers from (i1/2% to 21/% of the shank length.

We claim:

A stockless anchor for ready engagement with a generally cylindrical hawse pipe comprising a shank having cable-attaching means at one end thereof, and a' unitary crown and iiuke'member pivotally connected to the other end of said shank and rockable from a plane containing the axis of the shank through a limited angle in either direction, said crown and fluke member including a tripping head, stabilizing arms projecting in opposite directions outwardly from said tripping head, lukes extending forwardly from the inner portions of said arms and immediately adjacent the shank, said arms and fiukes being substantially fiat and coplanar, said tripping head comprising symmetrical portions projecting in opposite directions from the plane of said arms and flukes, each said portion having a generally semicircular contour when projected on a plane perpendicular to the axis of the shank when the shank is in limiting position adjacent said portion, whereby when the shank of the anchor is drawn snugly into a ships hawse pipe having a diameter approximately equal to the diameter of said semi-circular contour either tripping head portion fully enters into the generally cylindrical hawse pipe and together with the shank and the adjacent portions of the iiukes substantially blocks the hawse pipe, and said arms and ukes rest generally at against the side of the ship.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 323,774 Baxter Aug. 4, 1885 907,957 Bickley Dec. 29, 1908 1,804,273 Pelkey May 5, 1931 2,279,302 Craig Apr. 14, 1942 2,282,566 Danforth May 12, 1942 2,315,513 FitzGerald Apr. 6, 1943 FOREIGN PATENTS Number Country Date 5,243 Great Britain Feb. 26, 1897 29,413 Great Britain Dec. 31, 1904