US6737A - Air-chamber of life-boat - Google Patents
Air-chamber of life-boat Download PDFInfo
- Publication number
- US6737A US6737A US6737DA US6737A US 6737 A US6737 A US 6737A US 6737D A US6737D A US 6737DA US 6737 A US6737 A US 6737A
- Authority
- US
- United States
- Prior art keywords
- boat
- air
- bow
- life
- stern
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 241000272168 Laridae Species 0.000 description 18
- 238000010276 construction Methods 0.000 description 6
- 238000005188 flotation Methods 0.000 description 6
- 230000005484 gravity Effects 0.000 description 6
- 210000001331 Nose Anatomy 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPINGÂ
- B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
- B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
- B63B43/10—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy
- B63B43/12—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy using inboard air containers or inboard floating members
Definitions
- My improvement consists of a peculiar construction or extension of each of the said air chambers C, D, whereby I am enabled with respect to the common mode of making such air chambers, to obtain more buoyant power and in consequence thereof a greater elevation of the center of gravity of theboat above the plane or line of flotation, whenever the said boat may be thrown bottom upward.
- others are gained by the improved mode of constructing the boat at or above the bow and stern.'
- the ordinary method of constructing a life boat, with an air tight chamber at the bow and stern, is to extend the top part of each of said chambers as represented by the dotted lines a c d, in Fig. 9 and flat or nearly flat in cross section. By so doing the air spaces at or near the points a, 7), beco-me very much contracted and present very little buoyant power.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Cleaning Or Clearing Of The Surface Of Open Water (AREA)
Description
um'rE E AIR-CHAMBER 0F LIFE-BOAT.
To all whom it may concer-n,
'tion of it.
In the drawings I have represented my improved boat as made 'with longitudinal air tight chambers A, B, placed along the sides and under the gunwale. I however do not deem them as constituting any part of my improvement. I have also exhibited the boat as built with air tight chambers C, D, arranged respectively at the bow and stern, the space for the rowers or navigators being between the said chambers, as seen at E, the said space being provided in the usual way with any suitable number of thwarts, o-r seats, F, F1, F2, &c.
My improvement consists of a peculiar construction or extension of each of the said air chambers C, D, whereby I am enabled with respect to the common mode of making such air chambers, to obtain more buoyant power and in consequence thereof a greater elevation of the center of gravity of theboat above the plane or line of flotation, whenever the said boat may be thrown bottom upward. The higher the center of gravity is elevated above vthe line of flotation under such circumstances the more readily will the boat be able to right itself or come right side up in case of being upset by sea or other cause. Besides this advantage others are gained by the improved mode of constructing the boat at or above the bow and stern.'
The ordinary method of constructing a life boat, with an air tight chamber at the bow and stern, is to extend the top part of each of said chambers as represented by the dotted lines a c d, in Fig. 9 and flat or nearly flat in cross section. By so doing the air spaces at or near the points a, 7), beco-me very much contracted and present very little buoyant power.
I `make the deck or upper part of each of the said air chambers semi-conical, or semi Specification of Letters Patent No. 6,737, dated September 25, 1849.
paraboloidal, or some approximation thereto, and with the top descending toward the nose f, or It, of the bow or stern as seen at e j, g h, the base of each cone being elevated above the gunwale z', as seen at Z) e, c g.
Then the boat is upset or turned bottom upward, such a construction causes each semi-cone at or near its base to dip into the water, instead of dipping in at its apex as it does when the boat is constructed in the usual way. Ve thus obtain a great increase of buoyancy, in consequence of the same, and by so doing give to the center of gravity of the boat a greater elevation above the line of flotation, and of course a greater tendency to the boat to right itself.
The reversed inclined semi cone deck at the bow affords to the rowers great protection against seas which may be thrown over the bow. Besides this it adds to the strength of the boat, and renders the air chambers better adapted for stowage than they are when constructed in the old way, as de` scribed.
I generally intend to construct the bw or stern part of the boat, viz, that part which is below the plane of the aXis of the reversed semi cone deck a counterpart or about a counterpart of the said deck sofar as the form of its outer surface is concerned. For instance I make the whole o-f the bow or stern, a full cone or a paraboloid, or approXimat-ion thereto, but although I may adopt such a mode of construction. I do not by any means consider it essential to my invention.
lVIy invention, and that which I claim con` sists in the peculiar enlargement or mode of making each of the decks or upper parts of the air chambers at the bow and stern, each being constructed with a reversed inclina` tion, or depression toward the nose of the bow or stern and an elevation of base high above the gunwale, as represented in the drawings, and as differing from the mode hereto-fore practiced, and substantially delinpeated on said drawings by dotted lines; the said improvement in the bow and stern air chambers enabling me to obtain advantages as above stated, as well as many others not herein enumerated.
In testimony whereof I have hereto set my signature this fourth day of August A. D. 1849.
Witnesses: J. DURELL GREENE.
MELZAR F. IIoBBs, R. I-I. EDDY.
Publications (1)
Publication Number | Publication Date |
---|---|
US6737A true US6737A (en) | 1849-09-25 |
Family
ID=2067038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US6737D Expired - Lifetime US6737A (en) | Air-chamber of life-boat |
Country Status (1)
Country | Link |
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US (1) | US6737A (en) |
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0
- US US6737D patent/US6737A/en not_active Expired - Lifetime
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