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US698584A - Screw-propeller. - Google Patents

Screw-propeller. Download PDF

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Publication number
US698584A
US698584A US9051502A US1902090515A US698584A US 698584 A US698584 A US 698584A US 9051502 A US9051502 A US 9051502A US 1902090515 A US1902090515 A US 1902090515A US 698584 A US698584 A US 698584A
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United States
Prior art keywords
propeller
screw
hub
bearing
conical
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Expired - Lifetime
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US9051502A
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Robert Thaler
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Priority to US9051502A priority Critical patent/US698584A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/30—Lightning protection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • ROBERT TI-IALER OF WEST BAY CITY
  • MICHIGAN MICHIGAN
  • This invention relates to an improvement in screw-propellers, the object of the invention being to provide a simple and eflicient propeller having large area of blade-surface and large area of bearing-surface upon the projecting portion of the stern-post to prevent the shaft being bent or broken when the blade strikes an obstruction.
  • Another object is to provide means for antomatically removing dirt and grit from the rubbing-surfaces of the propeller and the projection on which it turns.
  • Figure l is a perspective View of the propeller and shaft.
  • Fig. 2 is a part-longitudinal section of the propeller in place on the projecting bearing of the stern-post.
  • Fig. 3 is an enlarged section taken on the line as w of Fig. 1.
  • A represents the screw, the length of which is preferably somewhat greater than the diameter.
  • the blades are helical in form and in revolving describe a cylinder of uniform diameter.
  • the shaft 1 is rigidly secured, by means of the key 2, to the outer end of the hub and fits the bore of the hub tightly from its outer end to about its middle.
  • the other end of the hub is provided with a conical recess 3, extending axially from the forward end of the screw and tapering to its smaller end 3 about midway the length of the screw.
  • the inner surface of the conical recess is finished to form a smooth bearing-surface.
  • the stern-post of the vessel is fitted with a rearwardly-projecting boss 4:, which carries at its outer end a conical bearing 4?, the outer surface of which exactly fits and forms a bearing for the inner surface 3 of the revolving hub.
  • the shaft 1 extends axially through the projection 4 and the conical bearing 4:.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Description

No. 698,584. Patented Apr. 29
B. THALER.
SCREW PRUPELLEB.
(Application filed Jan. 20, 1902.)
(No Model.)
WITNESSES:
ATTORNEY UNITED STATES PATENT OFFICE.
ROBERT TI-IALER, OF WEST BAY CITY, MICHIGAN.
SCREW-PROPELLER.
SPECIFICATION forming part of Letters Patent No. 698,584, dated April 29, 1902.
Application filed January 20, 1902. Serial No. 90,515. No modelJ ject of the Emperor of Germany, residing at West Bay City, in the county of Bay and State of Michigan, have invented certain new and useful Improvements in Screw Propellers; and I do hereby declare the following to be a full, clear, and exact description of the inven-,
tion, such as will enable others skilled in the art to which it appertains to make and use the same.
This invention relates to an improvement in screw-propellers, the object of the invention being to provide a simple and eflicient propeller having large area of blade-surface and large area of bearing-surface upon the projecting portion of the stern-post to prevent the shaft being bent or broken when the blade strikes an obstruction.
Another object is to provide means for antomatically removing dirt and grit from the rubbing-surfaces of the propeller and the projection on which it turns.
With this object in View the invention consists in certain novel features of construction and combinations and arrangements of parts, as hereinafter set forth, and pointed out in the claim.
In the accompanying drawings, Figure l is a perspective View of the propeller and shaft. Fig. 2 is a part-longitudinal section of the propeller in place on the projecting bearing of the stern-post. Fig. 3 is an enlarged section taken on the line as w of Fig. 1.
A represents the screw, the length of which is preferably somewhat greater than the diameter. The blades are helical in form and in revolving describe a cylinder of uniform diameter. The shaft 1 is rigidly secured, by means of the key 2, to the outer end of the hub and fits the bore of the hub tightly from its outer end to about its middle. The other end of the hub is provided with a conical recess 3, extending axially from the forward end of the screw and tapering to its smaller end 3 about midway the length of the screw. The inner surface of the conical recess is finished to form a smooth bearing-surface.
The stern-post of the vessel is fitted with a rearwardly-projecting boss 4:, which carries at its outer end a conical bearing 4?, the outer surface of which exactly fits and forms a bearing for the inner surface 3 of the revolving hub. The shaft 1 extends axially through the projection 4 and the conical bearing 4:.
In order to remove dirt or other foreign substances from between the rubbing-surfaces of the hub and the conical bearing 4:, I provide through the shell of the .hub pairs of slits 5, separated by intermediate bars 5, through which the dirt can escape. In practice I prefer to shape the intermediate bar 5 as shown in Fig. 3, having inner scraping edges 5 which mechanically remove the dirt from the surface of the bearing at and discharge it into the water through openings 5.
In practice I prefer to arrange a sufficient number of slits 5 around the hub and to make them of such length that the paths of succeeding slits as they travel around the conical bearing will overlap, thus thoroughly cleaning every part of the rubbing-surface.
By constructing the hub of the screw-propeller as abovedescribed and mounting it upon the conical bearing 4, which is rigidly attached to the stern-post of the vessel, I produce a screw having great lateral rigidity and one which cannot be easily broken by striking snags or other obstacles.
What I claim as my invention, and desire to secure by Letters Patent, is
A propeller for vessels comprising in combination a series of helical blades of greater length than the diameter of the propeller; a hub integral with said blades; an axial hole through said hub, the outer portion of the length of said hole being adapted to fit the propeller-shaft the remaining portion of said holebeing enlarged from the middle of the hub toward its forward end, to form a conical recess; openings through the conical shell of g
US9051502A 1902-01-20 1902-01-20 Screw-propeller. Expired - Lifetime US698584A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US9051502A US698584A (en) 1902-01-20 1902-01-20 Screw-propeller.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9051502A US698584A (en) 1902-01-20 1902-01-20 Screw-propeller.

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US698584A true US698584A (en) 1902-04-29

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US9051502A Expired - Lifetime US698584A (en) 1902-01-20 1902-01-20 Screw-propeller.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060128235A1 (en) * 2004-12-14 2006-06-15 David Wrigley Prevention of cavitation corrosion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060128235A1 (en) * 2004-12-14 2006-06-15 David Wrigley Prevention of cavitation corrosion

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