US3089452A

US3089452A - Anti-yawing combination

Info

Publication number: US3089452A
Application number: US107858A
Authority: US
Inventors: Thomas R Pedersen
Original assignee: PENN IND Inc
Current assignee: PENN IND Inc
Priority date: 1961-05-04
Filing date: 1961-05-04
Publication date: 1963-05-14
Anticipated expiration: 1980-05-14

Description

T. R. PEDERSEN ANTI-YAWING COMBINATION May 14, 1963 Filed May 4, 1961 2 Sheets-Sheet 1 INVENTOR. Thomas R. Pedersen BY eum/s' War/Ii, S4flo- A TTORNEYS May 14, 1963 'r. R. PEDERSEN ANTI-YAWING COMBINATION 2 Sheets-Sheet 2 Filed May 4, 1961 INVENTOR. Thomas R. Pedersen BY lut/ Ma/r/s' d .9 5 014 ATTORNEYS This invention relates to an anti-yawing device for barges or scows. It is well known that a barge or scow, when being towed at the end of a hawser, will yaw to either side of the course of the tug instead of following in its wake, thus making it impossible to tow in a narrow channel or without endangering other passing craft and without unduly increasing the horsepower and time necessary to transport the barge and scow from place to place. This yawing becomes so extensive at times that the barge or scow will ride up along side and spaced from the towing tug to the extent of the length of the hawser, thus making it necessary for the tug to change its course to bring the barge or scow back into proper towing position with the result that the course is unduly increased and horsepower and time are wasted.

Even when the barge or scow is lashed alongside the towing tug it still has the tendency to yaw, making it necessary for the tug to set a course to compensate for the force applied to it by the yawing.

The present invention is designed to prevent the yawing of the barge or scow to any detrimental extent, thus conserving horsepower, time and course distance and overcoming the endangering of passing craft.

Additionally the use of the yawing device of this invention enables the towing company to increase its towing field since it enables it to tow barges and scows in narrow channels and in heavy traffic.

Since barges and scows are of similar construction exept for the position of the load-carrying deck, for convenience, the two will be referred to hereafter as a barge; but the invention is applicable to both.

In the drawing, I have illustrated one form of antiyawing device or" this invention in which,

FIGURE 1 is a partial perspective view of the stern of a barge, showing the 'anti-yawing device in position;

FIGURE 2 is an elevation looking at the stern of the barge and showing the position of the anti-yawing device in relation to the light or unloaded waterline of the barge;

FIGURE 3 is a fragmentary plan view of the stern of a barge with the position of the anti-yawing device shown in dotted lines;

FIGURE 4 is a fragmentary view of the anti-yawing device looking at the side of the barge adjacent its stern;

FIGURE 5 is a fragmentary view showing a modification of the anti-yawing device in section; and

FIG. 6 is an elevation of the anti-yawing device shown in FIGURE 5.

' Referring to FIGURE 1, the side of the barge is indicated by I, while the stern rake is indicated by the numeral 2. In the barge disclosed, this rake is curved upwardly from the bottom 3 to the deck 4, but it is to be understood that the invention is equally applicable to barges having straight or plane upwardly inclined stern rakes.

The anti-yawing device comprises generally a plate 5 which is angular in form. This plate may be made in two parts joined together at the vertex or of a single plate and is secured to the rake of the barge by means of brackets 6 which are preferably welded to the plate and to the plates of the barge, when the barge is constructed of or sheathed by metal.

As shown in FIGURE 3 of the drawing, the two sides of the plate 5 diverge rearwardly and, as shown in FIG- URE 2, upwardly from the center line or garboard strake of the barge. It is to be particularly noted that the antiyawing device is at all times completely below the waterline of the barge. In FIGURE 2 the unloaded or light waterline of the barge is indicated by the dot and dash line 7.

It is also to be noted that the lowest point of the antiyawing device which is indicated at 5' in FIGURE 2 is above the bottom 3 of the barge so that if the barge is drawn up on the ways or on a surface for repair or inspectionthe anti-yawing device will be well protected and not disturbed.

In the form of the invention shown in FIGURES 1 through 4 the vertical width of the plate 5 is, preferably, constant from end to end of the device and each of the brackets 6 is smilar to the others.

When the barge, even of 130 ft. length, is towed bow first by means of the usual hawser and bridle, the drag created by the anti-yawing device has been found in actual practice to prevent any detrimental amount of yawing and to cause the straight tracking of the barge, and this even though the resistance added to the barge is very small and thus requires very little horsepower.

In a tested barge, which tracked almost perfectly, the length was 130 feet, the vertex of the angle of the plate 5 was at the centre line of the barge and the ends of the plate terminated equidistant from the sides of the barge as the invention contemplates, the beam 36 0", the vertical width of the plate 5 was 0' 9", the angularity 10 15', the length of the plate from the garboard strake or center line to each end was 17' 6".

Because of the fact that the plate 5 on each side of the center line of the barge recedes toward the stem at the same angle to the center line as the opposite side of the plate, the drag or resistance is normally equal on both sides of the center line or garbo-ard strake. Thus the tendency of that portion of the plate 5 at one side of the center line of the barge to swing the stern of the barge will be met by equal force applied to the other side of the plate. Thus the yawing tendency in one or the other of the directions will be overcome.

The trials have revealed that the wake of the tow with the anti-yawing device in place is flatter than that of the tow absent the anti-yawing device and that there is less white water.

In FIGURES 5 and 6 of the drawing, a modification of anti-yawing device is illustrated. In this form of the invention, the plate 5 on each side of the garboard strake or center line is provided with a vertically adjustable fin 8. These fins are secured in their vertical relation to the plate 5 by suitable means such as by bolts 9 and nuts It which bolts extend through holes 11 in the plate 5 and slots 12 in the fin 8. These fins are, as shown in the drawing, independently vertically adjustable.

Provision is made for this adjustment so that if, under any conditions, it is found that a greater drag on one side of the garboard strake or center line is desirable, adjustment quickly may be made to compensate for the encountered variation. Also, if in any given instance it seems advisable to have a vertically wider plate, this may be accomplished by vertically downwardly adjusting both of the webs into the position shown in FIGURE 6.

To protect the plate 5 and brackets 6 from injury by vagrant lines or ropes, guards 13 are provided which are secured at the ends of the plate 5 and to the barge as illustrated in FIGURES 3 and 4.

Barges with the anti-yawing device of this invention mounted thereon have been in practical use both loaded and unloaded for many months and over hundreds of miles of towing and have demonstrated the satisfactory anti-yawing effect of the device of this invention.

While I have illustrated and described the preferred 3 forms of the invention many details of construction and of dimensions and angularity may be changed without departing from the spirit of the invention or exceeding the scope of the claims.

What I claim is:

1. The combination with a barge having an upwardly and rearwardly inclined stern of an anti-yawing device mounted on said stern arranged entirely below the light waterline of the barge and comprising an angular substantially vertical plate having the vertex of the angle arranged forwardly of and below the ends of said plate, said vertex being arranged in line with the longitudinal center line of said barge, said plate being of constant width throughout its length and the ends thereof being equidistant from the sides of said barge and from the beam of said barge.

2. The combination with a barge having an upwardly and rearwardly inclined stern of an anti-yawing device mounted on said stern arranged entirely below the light waterline of the barge and comprising an angular substantially vertical plate having the vertex of the angle arranged forwardly of and below the ends of said plate, said vertex being arranged in line with the longitudinal center line of said barge, said plate being of constant width throughout its length and the ends thereof being equidistant from the sides of said barge and from the beam of said barge, and vertically adjustable fins mounted on said plate at both sides of said vertex.

3. The combination with a barge having an upwardly and rearwardly inclined stern of an anti-yawing device mounted on said stern arranged entirely below the light waterline of the barge and comprising an angular substantially vertical plate having the vertex of the angle arranged forwardly of and below the ends of said plate, said vertex being arranged in line with the longitudinal center line of said barge, said plate being of constant width throughout its length and the ends thereof being equidistant from the sides of said barge and from the beam of said barge, and independently vertically adjustable fins mounted on said plate at both sides of said vertex.

4. The combination with a barge having an upwardly and rearwardly inclined stern of an anti-yawing device mounted directly on said stern and consisting of an angular vertical plate member consisting of two diverging Wings and having the vertex of the angle arranged forwardly of the ends thereof.

5. The combination with a barge having an upwardly and rearwardly inclined stern of an anti-yawing device mounted on said stern and arranged entirely below the light waterline of the barge and consisting of an angular vertical plate member consisting of two wings and having the vertex of the angle arranged forwardly of and below the ends thereof.

6. The combination with a barge having an upwardly and rearwardly inclined stern of an anti-yawing device mounted on said stern and arranged entirely below the light waterline of the barge and consisting of an angular vertical plate consisting of two wings and having the vertex of the angle arranged forwardly of the ends of said plate, said vertex being arranged in line with the longitudinal center line of said barge.

7. The combination with a barge having an upwardly and rearwardly inclined stern of an anti-yawing device mounted on said stern and arranged entirely below the light waterline of the barge and comprising an angular vertical plate having the vertex of the angle arranged forwardly of the ends of said plate, said plate being of constant width throughout its length.

8. The combination with a barge having an upwardly and rearwardly inclined stern of an anti-yawing device mounted on said stern and consisting of an angular vertical plate member consisting of two wings and having the vertex of the angle arranged forwardly of the ends of said plate, said vertex being arranged in line with the longitudinal center line of said barge and the ends of said plate being equidistant from the sides of said barge and from the beam of said barge.

9. An anti-yawing device for barges consisting of an angular anti-yawing plate, the legs of said plate being of equal length from the vertex of the angle of their ends and a fin mounted on said plate at each side of the vertex thereof and adjustable to increase the effective width of said plate to increase its drag ability.

10. The combination with a barge having an upwardly and rearwardly inclined stern of an anti-yawing device mounted on said stern arranged entirely below the light waterline and above the bottom of the barge and comprising an angular substantially vertical plate having the vertex of the angle arranged forwardly of and below the ends of said plate, said vertex being arranged in line with the longitudinal center line of said barge, said plate being of constant width throughout its length and the ends thereof being equidistant from the sides of said barge and from the beam of said barge and a plurality of spaced vertical fins extending rearwardly from said plate and at substantially right angles thereto.

11. The combination with a barge having an upwardly and rearwardly inclined stern of an anti-yawing device mounted on said stern arranged entirely below the light waterline of the barge and comprising an angular substantially vertical plate having the vertex of the angle arranged forwardly of and below the ends of said plate, said vertex being arranged in line with the longitudinal center line of said barge, said plate being of constant width throughout its length and the ends thereof being equidistant from the sides of said barge and from the beam of said barge and a plurality of spaced vertical fins extending rearwardly from said plate and at substantially right angles thereto and spaced substantially equal distances apart.

12. The combination of a barge having an upwardly and rearwardly inclined stern of an anti-yawing device mounted on said stern arranged entirely below the light waterline of the barge and comprising an open angular plate extending downwardly from said stern of said barge, the vertex of the angle being at the forward portion of said angular, plate and the portions of said plate on the opposite sides of said vertex extending rearwardly from the vertex and being of substantially equal areas with the ends thereof substantially equidistant from the sides of the barge and from the beam thereof.

13. The combination of a barge having an upwardly and rearwardly inclined stern of an anti-yawing device mounted on said stern arranged entirely below the light waterline of the barge and comprising an open angular plate extending downwardly from said stern of said barge, the vertex of the angle being at the forward portion of said angular plate and the portions of said plate on the opposite sides of said vertex extending rearwardly from the vertex and being substantially symmetrical.

References Cited in the file of this patent UNITED STATES PATENTS 883,455 Friedel Mar. 31, 1908 923,648 Gunnel June 1, 1909 1,442,522 Nachenius Jan. 16, 1923 1,980,114 Taylor Nov. 6, 1934 2,068,921 Leigh Jan. 26, 1937 2,930,338 Flomenhoft Mar. 29, 1960 2,971,487 Plum Feb. 14, 1961 2,984,200 Toussel May 16, 1961 2,994,290 Merchant Aug. 1, 1961 2,998,792 Hasler Sept. 5, 1961 FOREIGN PATENTS 3,719 France Dec. 7, 1904 838,860 France Dec. 16, 1938 423,165 Italy July 7, 1947 1,210,934 France Oct. 5, 1959

Claims

1. THE COMBINATION WITH A BARGE HAVING AN UPWARDLY AND REARWARDLY INCLINED STERN OF AN ANTI-YAWNING DEVICE MOUNTED ON SAID STERN ARRANGED ENTIRELY BELOW THE LIGHT WATERLINE OF THE BARGE AND COMPRISING AN ANGULAR SUBSTANTIALLY VERTICAL PLATE HAVING THE VERTEX OF THE ANGLE ARRANGED FORWARDLY OF AND BELOW THE ENDS OF SAID PLATE, SAID VERTEX BEING ARRANGED IN LINE WITH THE LONGITUDINAL CENTER LINE OF SAID BARGE, SAID PLATE BEING OF CONSTANT WIDTH THROUGHOUT ITS AND LENGTH AND THE ENDS THEREOF BEING EQUIDISTANT FROM THE SIDES OF SAID BARGE AND FROM THE BEAM OF SAID BARGE.