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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Prior art keywords
propeller
shaft
reversible screw
blades
screw propeller
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Expired - Lifetime
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US515063A
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Duerr Edgar
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    • 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)

Description

E. DUERR.
REVERSIBLE SCREW PROPELLER.
APPLICATION FILED NOV. 14, 192|.
Patent-ed Oct. 110, 1923,
Patented @et l0, MEZ.
EDGAR DUERR, 0F BELLA VISTA, ENGLAND.
REVERSIBLE SCREW PROPELLER.
Application led November 14, 1921. Serial No. 515,063.
T 0 all 'whom it may concern.'
Be it knownv that I, EDGAR DUERR, a subject of the King of Great Britain and Ireland, and resident of Bella Vlsta, Langham Road, Bowdon, in the county of Chester, England, have invented certaln new. and use ful Improvements in Reversible Screw Propellers, of which the following 1s a speciication.
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.
My invention further comprises the details of construction and arrangement hereinafter described and claimed.
,to is disposed a shaft Referring to the accompanying sheet of explanatory drawings Figure 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 same reference letters in the two views indicate the same parts.
In the illustrated application of 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.
Within the hollow shaft b before referred f having right and left hand spiral keywa s g therein, 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. By reasonbf the arrangement of the two pinions upon the shaft f,
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. In the arrangement illustrated, 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.
To give strength to the propeller blades, these are each supported at both sides of the pinion thereon as shown. To place the blades in position they are threaded into the boss through the bevel pinions, the latter being pinned to prevent unscrewing.
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.
f desired, instead of traversing the shaft b from the engine side of the propeller it may be operated from the opposite side and the propeller shaft b be made solid.
l. In reversible screw propellers, the comtorque is transmitted to the ybinatibn with a plurality of blades, a boss meme@ el a shaft in seid bose, e
peil o Wheels om,
seid shaft epgegng said pnons, right and left hund Spual key and keywey connections between seid shaft and said Wheels, and
:means for imparting longitudinal movements to seid shaft relativ es Set forth.
ely to sold Wheels,
ln testimony whereof l have signed Edy name to this specoetlon.
GAR DUREE.
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)

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US1431382A true US1431382A (en) 1922-10-10

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US515063A Expired - Lifetime US1431382A (en) 1920-12-31 1921-11-14 Reversible screw propeller

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US (1) US1431382A (en)
DE (1) DE367194C (en)
GB (1) GB176568A (en)
NL (1) NL9989C (en)

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 (en) 1923-01-18
NL9989C (en)
GB176568A (en) 1922-03-16

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