US160212A - Improvement in blades for screw-propellers - Google Patents
Improvement in blades for screw-propellers Download PDFInfo
- Publication number
- US160212A US160212A US160212DA US160212A US 160212 A US160212 A US 160212A US 160212D A US160212D A US 160212DA US 160212 A US160212 A US 160212A
- Authority
- US
- United States
- Prior art keywords
- blades
- hub
- improvement
- screw
- propellers
- 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
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000754 Wrought iron Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
- B63H1/26—Blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
- B63H1/20—Hubs; Blade connections
Definitions
- My invention relates to an improvement in the construction of propeller-blades, so that they will be greatly increased in strength and adapted to be easily replaced when necessary.
- Figure 1 is a perspective view, showing the back of the blade.
- Fig. 2 is a side view with a section of the hub and base of the blade.
- A is the shaft of a .propeller
- B is ahub to which the blades are to be secured.
- In the face of the hub are formed wide slots parallel with its axis, and of sufficient width and depth to admit of as great a thickness of metal as may be contained in the part of the blade which is fitted to the slot, and also the bracing-plates to be used.
- As many slots will be made as there are blades to the propeller.
- the propellerblades O are formed of sheets of metal of suflicient thickness to withstand the pressure. I prefer boiler-iron, which is shaped as may be desired for the blade. The inner end is bent at right angles and fitted to the slot in the hub.
- one, two, or more three strengthening-plates are used I prefer to bend the inner end of the propeller-blade and one of the plates in one direction, while the other two are bent in the opposite direction, thus filling the slot up ready to receive the outer plates and bands.
- These bands G are made of wrought-iron or steel, and sufficiently strong for the purpose. They may be shrunk upon the hub, a place being turned for them, so that they will lie flush with the outer face of the hub. The ends of the plates may be bent down over the end of the hub to further secure them, if desired. By this means the propeller-blades are made strong enough to resist any strain which may be brought upon them, and are at the same time elastic.
- a removable screw-propeller blade constructed of a series of gradually reduced plates, 0 cl 6, fastened rigidly together, and having their ends turned at right angles to fit the recesses in the hub, so as to make the blade strongest near the hub, as set forth.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
UNITED STATES PATENT OFFICE.
JAMES HART LOFT US, OF OAKLAND, CALIFORNIA.
IMPROVEMENT IN BLADES FOR SCREW-PROPELLERS.
Specification forming part of Letters Patent No. 160,212, dated February 23, 1875; application filed November 21, 1874.
To all whom it may concern:
Be it known that I, JAMES H. LOFTUS, of Oakland, Alameda county, State of California, have invented a Device for Securing Propeller-Blades to the Hub; and I do hereby declare the following description and accompanying drawings are sufficient to enable any person skilled in the art or science to which it most nearly appertains to make and use my said invention without further invention or experiment.
My invention relates to an improvement in the construction of propeller-blades, so that they will be greatly increased in strength and adapted to be easily replaced when necessary.
Referring to the accompanying drawing for a more complete explanation of my invention, Figure 1 is a perspective view, showing the back of the blade. Fig. 2 is a side view with a section of the hub and base of the blade.
A is the shaft of a .propeller, and B is ahub to which the blades are to be secured. In the face of the hub are formed wide slots parallel with its axis, and of sufficient width and depth to admit of as great a thickness of metal as may be contained in the part of the blade which is fitted to the slot, and also the bracing-plates to be used. As many slots will be made as there are blades to the propeller. The propellerblades O are formed of sheets of metal of suflicient thickness to withstand the pressure. I prefer boiler-iron, which is shaped as may be desired for the blade. The inner end is bent at right angles and fitted to the slot in the hub. I prefer to make the slot and the plates fiat, and then fit a holdingpiece over the outside of the whole, which shall correspond to the curve of the hub, and around which the holding-bands pass. In order to strengthen my blade where it is weakest-near the hub-I fit one, two, or more three strengthening-plates are used I prefer to bend the inner end of the propeller-blade and one of the plates in one direction, while the other two are bent in the opposite direction, thus filling the slot up ready to receive the outer plates and bands. These bands G are made of wrought-iron or steel, and sufficiently strong for the purpose. They may be shrunk upon the hub, a place being turned for them, so that they will lie flush with the outer face of the hub. The ends of the plates may be bent down over the end of the hub to further secure them, if desired. By this means the propeller-blades are made strong enough to resist any strain which may be brought upon them, and are at the same time elastic.
Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-
A removable screw-propeller blade, constructed of a series of gradually reduced plates, 0 cl 6, fastened rigidly together, and having their ends turned at right angles to fit the recesses in the hub, so as to make the blade strongest near the hub, as set forth.
In witness whereof I hereunto set my hand and seal.
JAMES HART LOFTUS.
Witnesses:
JNo. L. BooNE, O. M. RICHARDSON.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US160212A true US160212A (en) | 1875-02-23 |
Family
ID=2229622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US160212D Expired - Lifetime US160212A (en) | Improvement in blades for screw-propellers |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US160212A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8398298B2 (en) * | 2010-12-14 | 2013-03-19 | William H. Swader | Automatic pot stirrer |
-
0
- US US160212D patent/US160212A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8398298B2 (en) * | 2010-12-14 | 2013-03-19 | William H. Swader | Automatic pot stirrer |
| US8616762B2 (en) | 2010-12-14 | 2013-12-31 | William H. Swader | Automatic pot stirrer |
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