US1012441A - Propeller. - Google Patents

Propeller. Download PDF

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Publication number
US1012441A
US1012441A US57322910A US1910573229A US1012441A US 1012441 A US1012441 A US 1012441A US 57322910 A US57322910 A US 57322910A US 1910573229 A US1910573229 A US 1910573229A US 1012441 A US1012441 A US 1012441A
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United States
Prior art keywords
blades
propeller
hub
sets
width
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Expired - Lifetime
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US57322910A
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William Reid
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Individual
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Priority to US57322910A priority Critical patent/US1012441A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections

Definitions

  • a further object of the invention is to so space the sets of blades that those of one set will not interfere with the roper working of those of the set next in front, the object being to prevent the rear blades engaging the water from the forward blades.
  • Figure 1 is a side elevation of the propeller.
  • Fig. 2 is a rear view thereof; and
  • Fig. 3 is a view looking at the ends of the propeller blades.
  • 1 designates the propeller shaft; 2 the propeller hub which carries the propeller blades.
  • 2 the propeller hub which carries the propeller blades.
  • To this hub are secured two sets of blades A and B, the blades B being the rear blades and the blades A the forward blades.
  • the blades A are arranged radially with respect to the'hub and the longitudinal center line thereof is perpendicular with respect to the propeller shaft. These blades may, of course, be given any desired pitch and may be of any suitable shape.
  • the blades B are placed a suitable distance in the rear of the blades A and the longitudinal center line of each of said blades is oblique to the longitudinal center line of the propeller shaft so that said blades incline rearwardly from the hub.
  • These blades are, of course, arranged at diametrically opposite points as illustrated clearly in Fig. 2 and are directly in the rear of the blades A, as also illustrated clearly in Fig. 2.
  • the purpose of the rearward inclination of these blades B is to prevent said blades receiving the water from the blades A.
  • the rear blades are arranged oblique to the longitudinal line of the shaft so that the 1 space between the blades is equal to twice the width of the blades from the hub up to their place of greatest width.
  • the blades shown in the drawings, gradually increase in width from the hub to a point near their outer ends it is necessary to incline the rear set of blades rearwardly in order to maintain said blades from each other a distance equal to twice the width of the blades. It is manifest that if the blades were of the same width throughout all points in their length they might be arranged parallel.
  • a boat fitted with such a pro- A propeller comprising a hub, and forward and rear sets of blades thereon, the forward set of blades extending radially outward in opposite directions with their axes perpendicular to the hubaxis, the rear set of blades being located in alinement with and to the rear of the forward set of blades with their longitudinal axes in a plane passing through the axis of the hub stantially equal to twice the width of either and sald blades, said rear blades being inblade at that .point. in
  • sub- THOMAS MCMAHQN sub- THOMAS MCMAHQN.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

W. REID.
PROPELLER.
APPLICATION nun) JULY 22, 1910.
1,012,441. Patented Dec. 19, 1911.
WILLIAM REID, OF NEWARK, NEW JERSEY.
PROPELLER.
Specification of Letters Patent.
Patented Dec. 19, 1911.
Application filed July 22, 1910. Serial No. 573,229.
To all whom it may, concern:
Be it known that I, IVILLIAM REID, a citizen of the United States, and a resident of Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvementsin Propellers, of which i the following is a full, clear, and exact devide a propeller having a plurality of sets of blades having two blades in each set, said blades extending radially from the hub in diametrically opposite directions and the blades of the rear set or sets being directly in the rear of the blades of the forward set.
A further object of the invention is to so space the sets of blades that those of one set will not interfere with the roper working of those of the set next in front, the object being to prevent the rear blades engaging the water from the forward blades.
With these and other objects in view, the invention will be hereinafter more particularly described with reference to the accompanying drawings, which form a part of this specification, and will then be pointed out in the claims at the end of the description.
In the drawings, Figure 1 is a side elevation of the propeller. Fig. 2 is a rear view thereof; and Fig. 3 is a view looking at the ends of the propeller blades.
Referring to the various parts by 1111- merals, 1 designates the propeller shaft; 2 the propeller hub which carries the propeller blades. To this hub are secured two sets of blades A and B, the blades B being the rear blades and the blades A the forward blades. The blades A are arranged radially with respect to the'hub and the longitudinal center line thereof is perpendicular with respect to the propeller shaft. These blades may, of course, be given any desired pitch and may be of any suitable shape. The blades B are placed a suitable distance in the rear of the blades A and the longitudinal center line of each of said blades is oblique to the longitudinal center line of the propeller shaft so that said blades incline rearwardly from the hub. These blades are, of course, arranged at diametrically opposite points as illustrated clearly in Fig. 2 and are directly in the rear of the blades A, as also illustrated clearly in Fig. 2. The purpose of the rearward inclination of these blades B is to prevent said blades receiving the water from the blades A.
The rear blades are arranged oblique to the longitudinal line of the shaft so that the 1 space between the blades is equal to twice the width of the blades from the hub up to their place of greatest width. As the blades, shown in the drawings, gradually increase in width from the hub to a point near their outer ends it is necessary to incline the rear set of blades rearwardly in order to maintain said blades from each other a distance equal to twice the width of the blades. It is manifest that if the blades were of the same width throughout all points in their length they might be arranged parallel. I have found that by so spacing the sets of blades from each other, the desired result is secured and a boat fitted with such a pro- A propeller comprising a hub, and forward and rear sets of blades thereon, the forward set of blades extending radially outward in opposite directions with their axes perpendicular to the hubaxis, the rear set of blades being located in alinement with and to the rear of the forward set of blades with their longitudinal axes in a plane passing through the axis of the hub stantially equal to twice the width of either and sald blades, said rear blades being inblade at that .point. in
clined rearward relative tothe forward This specification signed and witnessed blades and spaced from said forward blades this eighteenth day of July A. D. 1910. 5 in such a manner that the distance between the blades on a line parallel with the axis Witnesses of the shaft is, at :any point Between the JOHN SHEEHAN,
hub and the widest part of the blades, sub- THOMAS MCMAHQN.
WILLIAM. REID. I
US57322910A 1910-07-22 1910-07-22 Propeller. Expired - Lifetime US1012441A (en)

Priority Applications (1)

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US57322910A US1012441A (en) 1910-07-22 1910-07-22 Propeller.

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US57322910A US1012441A (en) 1910-07-22 1910-07-22 Propeller.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4514146A (en) * 1982-10-20 1985-04-30 Mitsui Engineering & Shipbuilding Co., Ltd. Propeller for ship
US20130259693A1 (en) * 2012-04-03 2013-10-03 Yih-Wei Tzeng Ship propeller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4514146A (en) * 1982-10-20 1985-04-30 Mitsui Engineering & Shipbuilding Co., Ltd. Propeller for ship
US20130259693A1 (en) * 2012-04-03 2013-10-03 Yih-Wei Tzeng Ship propeller

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