US191007A - Improvement in adjustable guards for screw-propellers - Google Patents
Improvement in adjustable guards for screw-propellers Download PDFInfo
- Publication number
- US191007A US191007A US191007DA US191007A US 191007 A US191007 A US 191007A US 191007D A US191007D A US 191007DA US 191007 A US191007 A US 191007A
- Authority
- US
- United States
- Prior art keywords
- screw
- shield
- propellers
- improvement
- propeller
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 241000272168 Laridae Species 0.000 description 8
- 238000010276 construction Methods 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 4
- 206010022114 Injury Diseases 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003292 diminished Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
Definitions
- the invention has for its object to prevent the swell of the water created by the revolution of the propeller from washing and injuring the banks of the canal or stream and consists in placing at each side of the propeller a shield, which is attached to the hull of the Vessel, and which, while allowing free access of the water to the propeller, Will practically prevent the formation of any lateral swell or wave.
- the invention also consists in the details of construction hereinafter .more fully pointed out.
- Figure 1 is a side view of the stern part of a boat provided with my improvement.
- Fig.2 is a stern view of the same.
- the letter A represents the hull of a canal or other boat, of suitable construction.
- B is the screw-propeller thereof.
- 0 is a shield, of tubular or other form, and provided with a large number of small perforations, and made of metal orother proper material.
- This shield G if made tubular, as in Fig. 2, encircles the propeller B, and is fastened to the stern of the boat A in suitable manner. I prefer to fasten it, however, in the manner indicated in the drawing-that is to say, by rods ac, attached to, and projecting forward from, the shield, and passing through corresponding eyes b b, that are applied to the hull of the boat near the stern thereof.
- the shield O can be adjusted lengthwise on the boat to regulate its effect; but other suitable fastenings may be employed.
- the shield 0 should be of such interior diameter that it allows free revolution of the screw-propeller, and is open at both ends, so that the water may freely reach the propeller through the front and be discharged at the rear of the shield. In this way the efficiency of the propelling mechanism is in no wise diminished; but the shield, though allowing the water to pass through its perforations, will break up and destroy any lateral swell created by the propeller, and prevent, in consequence, all injury to the banks of the canal or other water-passages through which the boat passes. If the shield is not perforated, it will also destroy the lateral swell but it is then not as efficient as a perforated shield.
- the shield tubular it may be made of other suitable form, as the essential feature of this invention consists in the application of a shield to each side of the screw-propeller of a vessel.
- the adjustable shield O herein described, fastened to the body of a vessel, A, by means of rods a and eyes b, substantially as specified.
Description
' A. MARSCHALL.
ADJUSTABLE GUARDS FOR SCREW-PROPELLERS.
No. 191,007- Patented May 22,1877.
ml'nesses Inventor:
222 M y 'z Z M.
N. PETERS, FHOTO-LITHOGRAPHER. WASHINGTON. ,D C.
UNITED STATES PATENT OFFICE.
AUGUST MARSGHALL, OF NEW YORK, N. Y.
IMPROVEMENT IN ADJUSTABLE GUARDS FOR SCREW-PROPELLERS Z Specification forming part of Letters Patent No. 191,007, dated May 22, 1877 application filed March 10, 1877.
To all whom it may concern:
Be it known that I, AUGUST MARSCHALL, of the city of New York, county and State of New York, have invented an Improvement in Screw-Propellers, of which the following is a specification This invention relates to an improvement on boats which are driven by means of screwpropellers and travel through narrow or shallow water-courses, such as canals or the like.
The invention has for its object to prevent the swell of the water created by the revolution of the propeller from washing and injuring the banks of the canal or stream and consists in placing at each side of the propeller a shield, which is attached to the hull of the Vessel, and which, while allowing free access of the water to the propeller, Will practically prevent the formation of any lateral swell or wave.
The invention also consists in the details of construction hereinafter .more fully pointed out. I
In the accompanying drawing, Figure 1 is a side view of the stern part of a boat provided with my improvement. Fig.2 is a stern view of the same.
Similar letters of reference indicate corresponding parts in both figures. V
The letter A represents the hull of a canal or other boat, of suitable construction. B is the screw-propeller thereof. 0 is a shield, of tubular or other form, and provided with a large number of small perforations, and made of metal orother proper material. This shield G, if made tubular, as in Fig. 2, encircles the propeller B, and is fastened to the stern of the boat A in suitable manner. I prefer to fasten it, however, in the manner indicated in the drawing-that is to say, by rods ac, attached to, and projecting forward from, the shield, and passing through corresponding eyes b b, that are applied to the hull of the boat near the stern thereof. By using this mode of attachment the shield O can be adjusted lengthwise on the boat to regulate its effect; but other suitable fastenings may be employed.
The shield 0 should be of such interior diameter that it allows free revolution of the screw-propeller, and is open at both ends, so that the water may freely reach the propeller through the front and be discharged at the rear of the shield. In this way the efficiency of the propelling mechanism is in no wise diminished; but the shield, though allowing the water to pass through its perforations, will break up and destroy any lateral swell created by the propeller, and prevent, in consequence, all injury to the banks of the canal or other water-passages through which the boat passes. If the shield is not perforated, it will also destroy the lateral swell but it is then not as efficient as a perforated shield.
Instead of making the shield tubular, it may be made of other suitable form, as the essential feature of this invention consists in the application of a shield to each side of the screw-propeller of a vessel.
I am aware that previous to my invention cylindrical shields having inner projections or blades have already been placed around propellers but the vanes served, by dammin g the water, to retard the action of the propeller, and to render, therefore, the entire attachment useless.
I claim as my invention- 1. The combination of a propeller, B, with the perforated encircling shield G, which is entirely smooth on its inner side, substantially as and for the purpose herein shown and described.
2. The adjustable shield O, herein described, fastened to the body of a vessel, A, by means of rods a and eyes b, substantially as specified.
AUGUST MARSOHALL.
Witnesses:
ERNEST O. WEBB, F. V. BBIESEN.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US191007A true US191007A (en) | 1877-05-22 |
Family
ID=2260414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US191007D Expired - Lifetime US191007A (en) | Improvement in adjustable guards for screw-propellers |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US191007A (en) |
-
0
- US US191007D patent/US191007A/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US1066988A (en) | Propeller. | |
| US537612A (en) | Propeller for vessels | |
| US191007A (en) | Improvement in adjustable guards for screw-propellers | |
| US1092960A (en) | Boat-propeller. | |
| US680671A (en) | Screw-propeller. | |
| GB124012A (en) | Improvements in and relating to the Driving of Ships, Boats, Windmills, Flying Machines and the like. | |
| US39394A (en) | Improved apparatus for marine propulsion | |
| US1029907A (en) | Propeller-wheel. | |
| US2328041A (en) | Steering device for boats | |
| US754710A (en) | Propelling apparatus for vessels. | |
| US201650A (en) | Improvement in screw-propellers | |
| US983587A (en) | Propeller-guard. | |
| US464898A (en) | Screw propeller | |
| US212638A (en) | Improvement in propelling canal-boats | |
| US1827806A (en) | Drag eliminator for ships | |
| US662522A (en) | Propeller for boats. | |
| US1234070A (en) | Screw-propeller. | |
| US170608A (en) | Improvement in guards for screw-propellers | |
| US154856A (en) | Improvement in means for utilizing the resistance to the forward motion of vessels | |
| US5224A (en) | V sgre | |
| US389330A (en) | Henry | |
| US636488A (en) | Propeller. | |
| US124136A (en) | Improvement in canal-boats | |
| US866544A (en) | Screw-propeller. | |
| US431096A (en) | Paddle-wheel for vessels |