US793373A - Feathering screw-propeller. - Google Patents
Feathering screw-propeller. Download PDFInfo
- Publication number
- US793373A US793373A US20628704A US1904206287A US793373A US 793373 A US793373 A US 793373A US 20628704 A US20628704 A US 20628704A US 1904206287 A US1904206287 A US 1904206287A US 793373 A US793373 A US 793373A
- Authority
- US
- United States
- Prior art keywords
- blades
- propeller
- screw
- box
- boat
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/30—Blade pitch-changing mechanisms
- B64C11/32—Blade pitch-changing mechanisms mechanical
- B64C11/34—Blade pitch-changing mechanisms mechanical automatic
- B64C11/343—Blade pitch-changing mechanisms mechanical automatic actuated by the centrifugal force or the aerodynamic drag acting on the blades
Definitions
- This invention relates to a screw-propeller which has its blades so attached that they will feather when the shaft is not rotated, and thus will not retard the boat, but will assume the proper pitch and drive the boat forwardly when the shaft is rotated.
- the object of this invention is to provide a very simple, strong, and durable screw-propeller with blades which will automatically feather when the motor is idle and will automatically set when the motor is started.
- each blade is formed eccentrically with relation to its shank, which is pivotally held in hearings in a box keyed to the tailof the shaft, so that the blades will oscillate on the shanks and tend to arrange themselves edgewise with relation tothe direction of travel through the water.
- Each blade is provided with a stop-shoulder, which is adapted to engage a stop-lug on the box, so that when the shaft is rotated and the blades tend to assume a position edgewise to the plane of rotation the stops will engage the lugs and hold the blades at the proper pitch to drive the boat forwardly.
- Figure l of the drawings shows a sideele vation of a two-bladed screw-propeller that embodies the invention with the blades feathered.
- Fig. 2 shows an elevation of this screw looking from the rear with the blades feathered.
- spring 8 may be arranged about the shank
- this screw is very SlIllple and strong and provides a screw-propeller which is always ready for use and yet which will not materially interfere with the speed of the boat driven by other power than a motor.
- Thisscrew-propeller is particularly adapted for sailing-boats which have auxiliary steam or other motors intended to be employed when itis impracticable to use the sails.
- Such screws as these could be used on the outside of triple-screw boats, which ordinarily are driven by the middle screw, the outside screws being used in an emergency or for speed, and when not used it is desirable that they shall not drag and impede the boat.
- a screw-propeller having a box adapted to be secured'to a shaft, said box being formed in two parts and having two openings extending therethrough transversely of the axis of the box, driving-blades, each blade having a shank that is eccentric with relation to its blade and a flange at each .end of the shank, said shanks extending through the openings in the box so that the flanges lie on opposite sides of the box, and stops on the box and adapted to engage stops on the flange for limiting the oscillations-of the blades, substantially as specified.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Description
No. 793,373. PATENTED JUNE 27,1905. E. HILL.
PEATHERING SCREW PROPELLER. APPLIOATION PiLBD MAY 4,1904.
Fog; 1.
Witnesses 12v venzoz":
M @y, i51 M'sQZZZorney M ym UNITED STATES ratentea dune 2'7, 1905.
EBENEZER HILL, OF NORWALK, CONNECTICUT.
F'EATHERING SCREW-PROPELLER.
SPECIFICATION forming part of Letters Patent No. 793,373, dated June 27, 1905.
Application filed May 4, 1904. $erial No. 206,287.
.To (all whom it may concern..-
Be it known that I, EBENEZER HILL, a citizen of the United States, residing at Norwalk, in the county of Fairfield and Statev of Connecticut, have invented a new and useful Feathering Screw-Propeller, of which the following is a specification.
This invention relates to a screw-propeller which has its blades so attached that they will feather when the shaft is not rotated, and thus will not retard the boat, but will assume the proper pitch and drive the boat forwardly when the shaft is rotated.
The object of this invention-is to provide a very simple, strong, and durable screw-propeller with blades which will automatically feather when the motor is idle and will automatically set when the motor is started.
The embodiment of the invention illustrated by the accompanying drawings has two blades; but the invention is not limited to a screw-propeller having two blades. Each blade is formed eccentrically with relation to its shank, which is pivotally held in hearings in a box keyed to the tailof the shaft, so that the blades will oscillate on the shanks and tend to arrange themselves edgewise with relation tothe direction of travel through the water. Each blade, however, is provided with a stop-shoulder, which is adapted to engage a stop-lug on the box, so that when the shaft is rotated and the blades tend to assume a position edgewise to the plane of rotation the stops will engage the lugs and hold the blades at the proper pitch to drive the boat forwardly.
Figure l of the drawings shows a sideele vation of a two-bladed screw-propeller that embodies the invention with the blades feathered. Fig. 2 shows an elevation of this screw looking from the rear with the blades feathered.
These shanks are loosely held in hearings in a box 3. so that the blades may oscillate on the axis of the eccentric shanks and tend to assume planes of the least resistance when in the water. The box is fastened to the tail of the shaft 4 in any desired manner. Upon flanges 5 at the ends of the shanks are stop-shoulders 6, that are adapted to engage stop-lugs 7, formed on the box, to limit the oscillatory movementsvof the blades. When the motor connected with the shaft is idle and the boat is moving forwardly, the blades will feather on the shanks and drag in the planes of least resistance and not materially affect the speed of the boat. When the motor is started up, the blades turn on the shanks until the stopshoulders on the flanges engage the stop-lugs on the box and hold the blades at the desired pitch for driving the boat forwardly. A
so as to normally hold the blade feathered, as illustrated in Fig. 5. With springs the blades would keep in feathered position when the boat was standing still and would not flap back and forth; but when power is applied the springs will yield and the blades set in driving position.
The construction of this screw is very SlIllple and strong and provides a screw-propeller which is always ready for use and yet which will not materially interfere with the speed of the boat driven by other power than a motor.
Thisscrew-propeller is particularly adapted for sailing-boats which have auxiliary steam or other motors intended to be employed when itis impracticable to use the sails.
Such screws as these could be used on the outside of triple-screw boats, which ordinarily are driven by the middle screw, the outside screws being used in an emergency or for speed, and when not used it is desirable that they shall not drag and impede the boat.
ing the blades in feathered position, substantially asspecified.
2. A screw-propeller having a box adapted to be secured'to a shaft, said box being formed in two parts and having two openings extending therethrough transversely of the axis of the box, driving-blades, each blade having a shank that is eccentric with relation to its blade and a flange at each .end of the shank, said shanks extending through the openings in the box so that the flanges lie on opposite sides of the box, and stops on the box and adapted to engage stops on the flange for limiting the oscillations-of the blades, substantially as specified.
' EBENEZER HILL.
Witnesses:
E. HILL, J r., HOWARD H. MOSSMAN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20628704A US793373A (en) | 1904-05-04 | 1904-05-04 | Feathering screw-propeller. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20628704A US793373A (en) | 1904-05-04 | 1904-05-04 | Feathering screw-propeller. |
Publications (1)
Publication Number | Publication Date |
---|---|
US793373A true US793373A (en) | 1905-06-27 |
Family
ID=2861863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US20628704A Expired - Lifetime US793373A (en) | 1904-05-04 | 1904-05-04 | Feathering screw-propeller. |
Country Status (1)
Country | Link |
---|---|
US (1) | US793373A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4047841A (en) * | 1974-11-15 | 1977-09-13 | Ab Jarnforadling | Propeller blading for a self-adjusting propeller for boats |
-
1904
- 1904-05-04 US US20628704A patent/US793373A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4047841A (en) * | 1974-11-15 | 1977-09-13 | Ab Jarnforadling | Propeller blading for a self-adjusting propeller for boats |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR20010040686A (en) | Propulsion system | |
US866369A (en) | Propeller. | |
US793373A (en) | Feathering screw-propeller. | |
KR101488000B1 (en) | Thruster for ship | |
US725097A (en) | Propeller. | |
US3567336A (en) | Propellers | |
US833364A (en) | Propeller for navigable vessels. | |
WO2017150299A1 (en) | Horizontal axis rotor and boat equipped with said rotor | |
US51295A (en) | Improved screw-propeller | |
US445864A (en) | spare | |
US624761A (en) | Screw-propeller | |
US1234070A (en) | Screw-propeller. | |
US453361A (en) | Screw-propeller | |
US2231464A (en) | Propeller | |
US835313A (en) | Screw-propeller. | |
US136015A (en) | Improvement in screw-propellers | |
US748176A (en) | Screw-propeller. | |
US2045A (en) | Improvement in the form of the screw-propeller for propelling vessels | |
US187633A (en) | Improvement in screw-propellers | |
US152973A (en) | Improvement in screw-propellers | |
US514489A (en) | Paddle for propelling small boats | |
US193989A (en) | Improvement in screw-propellers | |
US517233A (en) | Fritz otte | |
US496857A (en) | Propeller | |
US1853158A (en) | Vessel stern |