US2520024A

US2520024A - Channel tank top construction for ships

Info

Publication number: US2520024A
Application number: US25477A
Authority: US
Inventors: Wilford G Bartenfeld
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-05-06
Filing date: 1948-05-06
Publication date: 1950-08-22
Anticipated expiration: 1967-08-22

Description

Aug. 22, 1950 w. G. BARTENFELD CHANNEL TANK TOP CONSTRUCTION FOR SHIPS Filed May 6, 1948 d Z 6 f n e Z M r w Awmm atented Aug. 22, 1950 UNITED STATES PATENT CHANNEL TANK TOP CONSTRUCTION EOE SHIPS Wilford G. Bartenfeld, Lakewood, Ohio Application May 6, 1948, Serial-No. 25,477

3 Claims. 1

This invention relates to channel tank top con.- struction for ships, and more especially to a construction for a tank top by a transverse arrangement of channels supported by longitudinals.

The main object or" the invention is to provide a channel tank top construction in which the channels extend transversely and consequently thej oints between the channels lie in the same direction as the usual transverse scraping, movement of the clam-shell bucket upon the tank top in the-unloading ofthe ship.

Another object of the invention is to provide such a transverse channel tank top to save damage thereto by the ,clam-shellibucket, or in event the channels become distorted or out of surface alinement relative to one another by damage of said bucket, the bucket would not be bumping across possible upstanding side edges of the channel'sbut move smoothly in the same direction therewith.

Another object of the invention isto provide suchea1transverse channel tank top and supporting structure therefor at reduced weight, lower cost. resulting therefrom, and further reduced cost. in the prefabricating .of same and also in the assemblingthereof.

With the. above and other objects in view, the invention will be hereinafter described with reference to the accompanying drawings, and the novel features thereof will be particularly pointed out in the appended claims.

Inthe drawings, Figure l is a diagrammatical view of the cross section of the hull of a ship provided with a tank top according to my invention andlookingtowards the flange of a channel,

Fig.2 is a cross sectionalview of a part ofthe hull and my construction of tank top taken through the web of a channel,

Fig. 3 is a fragmental sectional view, on an enlarged scale, taken on line 3-3 of Fig. 2,

Fig. 4 is a similar view taken on line i-4 of Fig. 2, and

Fig. 5 is a cross sectional view of a pair of adjacent flanges of the tank top channels showing the welding of same.

Referring to the drawings, l represents the hull of a ship used for carrying coal or ore and comprising a bottom 2, sides 3 and 4, and longitudinal channel girders as at 5. The sides of the side tanks are indicated by 6 and l and extend to the bottom 2.

For carrying out my invention, there is arranged longitudinally of the ship and extending from the bottom 2 to the tank top, a center keelson 8 and side keelsons 9 and Ill. The usual floor plates 1! extend from the center vkeelson to the side keelsons. The channels, designated by [2, forlforming the tank top are cut oil-the required length for extending transversely of the ship from the side 6 to the side 1 of the side tanks andareinverted and arranged flange to flange in any suitable number with their outer sides I3 05 their webs H!- in surface alinement for forming the top of the tank as indicated by 15. For securing together the channels 12 side by side ingroups and, also for making the longitudinal joints 16 between the flanges ll thereof watertight and also water-tight at their ends l8, welding is employed at the upper web sides at l9 and at the lower toe ends at 20 and also at said ends of said channels.

.In assembling the groups of welded inverted channels [2 in position in the ship, said groups are placed upon the top edges of thecenter keelson8 and the side keelsons 9 and Ii), and with the adjacent pairs of welded flanges ll of the channels serving as a guide, said top edges of said keelsons are notched out beneath said pairs of'fianges by burning for receiving same and permitting the webs M of the channels to rest upon said top edges of said keelsons and the top edges of the floor plates ll. Air release openings 2| areprovided at'the inner corners of the channels 12 by cutting oli the complemental corners of the side keelsons at 22. After the groups of channels l2 are dropped into place inthe notched outkeelsons, the longitudinal joints of the adjacent groups are welded as already described, and all joints between the channels l2 and the center keelson 3 and the side keelsons 9 and Iii are welded at 23 and 2 2, and'between the channels i2 and the floor plates l l at 25.

For supporting the channels l2 between the keelsons, longitudinal stringers 26 consisting of a vertical plate 2i and having a lateral flange 23 at its lower edge are employed. The upper portions of the plates 2? of the stringers 26 are notched out similar to that of the center keelson for receiving the pairs of flanges ll of the channels I2, and are welded thereto at 29 and 3B in the same manner, and the lateral flanges 28 of the stringers enter notches iii of the floor plates H and rest upon the bottom edges 32 thereof.

The transverse channels l2 are supported at their ends by angles 33 and 3d fixed to the sides 6 and l, and the keelsons and the floor plates may be supported and the latter connected to the former according to standard practice.

The construction for transverse channel tank 3' top herein described provides a tank top capable of withstanding much clam-shell abuse in unloading, and provides for widely spaced and therefore fewer keelsons longitudinal stringers supporting the tank top channels from the floor plates, all of which makes for a prefabricated construction of less weight and reduced cost of material, also welding and erection at lower cost.

Having fully described my invention, what I claim is:

1. In a channel tank top construction for ships, the combination of keelsons, floor plates, channels having a web and flanges, the channels being inverted and arranged with their flanges side by side in pairs, the joints between said pairs of flanges being welded, the keelsons being notched for and receiving said pairs of flanges and permitting the webs of said channels to rest upon said keelsons, the joints between said keelsons and said channels being welded, the webs of said channels resting upon said floor plates, the joints between the webs of said channels and said floor plates being welded, stringers extending between said keelsons, the stringers consisting of vertical plates having lateral flanges at their lower edges, the vertical plates of the stringers being notched for and receiving said pairs of flanges of said channels, the vertical plates of the stringers being welded to said channels, and said floor plates being notched for receiving and retaining said lateral flanges of said stringers against lateral movement for supporting said stringers.

2. In a channel tank top construction for ships, the combination of keelsons, floor plates, channels having a Web and flanges, the channels being inverted and arranged with their flanges side by side in pairs, the joints between said pairs or flanges being welded, the keelsons being notched for and receiving said pairs of flanges and permitting the webs of said channels to rest upon said keelsons, the joints between said keelsons and said channels being welded, the webs of said channels resting upon said floor plates, the joints between the Webs of said channels and said floor plates being welded, stringers extending longitudinally between said center keelson and said side keelsons, said stringers consisting of a vertical plate and a right angle flange at its lower edge, the vertical plates of the stringers being notched for receiving said pairs of flanges of said channels and being welded thereto, said floor plates being provided with vertical rectangular openings extending from their upper edges for receiving and providing seats for and preventing lateral movement of said flanges of said stringers,

and said vertical plates and said flanges of said stringers being welded to said floor plates.

3. In a channel tank top construction for ships, the combination of keelsons, floor plates, channels having a web and flanges, the channels being inverted and arranged with their flanges side by side in pairs, the joints between said pairs of flanges being welded, the keelsons being notched for and receiving said pairs of flanges and permitting the webs of said channels to rest upon said keelsons, the joints between said keelsons and said channels being welded, the webs of said channels resting upon said floor plates, the joints between the webs of said channels and said floor plates being welded, stringers extending longitudinally between said center keelson and said side keelson, said stringers consisting of a vertical plate and a right angle flange at its lower edge, the vertical plates of the stringers being notched for and receiving said pairs of flanges of said channels and permitting the webs of said channels to rest upon said plates of said stringers, the vertical plates of the stringers being welded to said channels, said floor plates between said center keelson and said side keelsons being provided with vertical openings extending downwardly from their top edges and having parallel sides and a right angle bottom, stringers consisting of a vertical plate and a right angle flange along its lower edge, and the stringers being arranged in said openings of the floor plates and having their flanges resting upon said bottoms thereof and retained by said sides thereof for supporting said stringers and holding same in alinement.

WILFORD G. BARTENFELD.

REFERENCES CITED The following references are of record in the flle of this patent:

UNITED STATES PATENTS Great Britain Nov. 10, 1927