US1431382A - Reversible screw propeller - Google Patents

Reversible screw propeller Download PDF

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Publication number
US1431382A
US1431382A US515063A US51506321A US1431382A US 1431382 A US1431382 A US 1431382A US 515063 A US515063 A US 515063A US 51506321 A US51506321 A US 51506321A US 1431382 A US1431382 A US 1431382A
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US
United States
Prior art keywords
propeller
shaft
reversible screw
blades
screw 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
Application number
US515063A
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English (en)
Inventor
Duerr Edgar
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1431382A publication Critical patent/US1431382A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing
    • B63H3/02—Propeller-blade pitch changing actuated by control element coaxial with propeller shaft, e.g. the control element being rotary

Definitions

  • This invention relates to screw propellers of the type in which the angularity of the propellerblades with relatlon to the axls of the propeller shaft can be altered to reverse the direction of propulsionof the boat or the like to which the propeller is fitted.
  • the object of my invention is to provide an improved arrangement of the means for operating the propeller blades which shall be strong, efficient and reliable, shall permit of the b-lades being turned to any deslred position and shall automatically lock the blades in such position.
  • My invention comprises the combination witheach propeller blade of a pinion thereon engaged at opposite points by two pinions keyed to a shaft by keys in right and leftl hand spiral keyways so that endwise movement of the shaft imparts opposite angular movements to the pinions thereon and so turns the propeller blades to any desired angle.
  • FIG. l is a sectional elevation and Figure 2 an end view of a reversible screw propeller constructed and arranged in one convenient form in accordance with my invention.
  • the propeller boss is made in three parts, one part a being secured upon a hollow driving shaft b, a second part c which carries the blades d and their reversing mechanism and which screws on to the first part, and a third part e which is screwed into the second part.
  • the complete boss may be of any desired external form.
  • the said central shaft passing tiirough the propeller is given longitudinal movement, the two pinions L, z' thereon are turned through equal angles in opposite directions and so turn the propeller blades d.
  • the latter can be turned to any position from a feathering position to one giving full ahead or full astern motion to the boat to which the propeller is fitted.
  • vthe propeller blades are self locking in any position and no said shaft.
  • the drive to the propeller may be arranged through both the hollow and central shafts -or through either of these.
  • the part 7c is attached to the engine driving shaft or its equivalent and the end of the shaft b is keyed therein.
  • the rod f1 passes through a cross head or disc m which is attached to a sliding collar .n by rods o. The latter pass through holes inpart m and are thereby caused to rotate the cross head m and the rod f1.
  • a suitable fork or its equivalent operated by hand or by power traverses the collar n-and the shaft f for altering the angular position of the propeller blades.
  • the propeller is simple to assemble, readily manipulated for reversing and speed controlling purposes, and the blades are not liable to ready fracture or breakage from the boss or to become jammed during operations. It can be used upon aircraft, as a fan or exhauster and for other purposes.
  • the comtorque is transmitted to the ybinatibn with a plurality of blades, a boss meme@ el a shaft in seid bose, e
  • seid shaft epgegng said pnons, right and left hund Spual key and keywey connections between seid shaft and said Wheels, and

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Screw Conveyors (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US515063A 1920-12-31 1921-11-14 Reversible screw propeller Expired - Lifetime US1431382A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB36640/20A GB176568A (en) 1920-12-31 1920-12-31 Improvements in reversible screw propellers

Publications (1)

Publication Number Publication Date
US1431382A true US1431382A (en) 1922-10-10

Family

ID=33495813

Family Applications (1)

Application Number Title Priority Date Filing Date
US515063A Expired - Lifetime US1431382A (en) 1920-12-31 1921-11-14 Reversible screw propeller

Country Status (4)

Country Link
US (1) US1431382A (de)
DE (1) DE367194C (de)
GB (1) GB176568A (de)
NL (1) NL9989C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2573764A (en) * 1947-06-07 1951-11-06 Carl J Green Variable pitch propeller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2573764A (en) * 1947-06-07 1951-11-06 Carl J Green Variable pitch propeller

Also Published As

Publication number Publication date
DE367194C (de) 1923-01-18
GB176568A (en) 1922-03-16
NL9989C (de)

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