US913951A - Propeller. - Google Patents

Description

F. J. GOWING.

PROPELLER. APPLICATION FILED JAN. 16, 1907.

Patented M21112, 1909. 2 SHEETS-SHEET l.

Inventor. Fred J. Sowing. S flaw/U Kk m P. J. GOWING.

' PROPELLER.

APPLICATION FILED JAN.16,1907.

Patented Mar. 2, 1909.

2 SHEETSSHBET 2.

\fifitne ss es: Inventor;

' Fred JGOWing K No. 913,951.

UNITED STATES PATENT oFErCiE.

FRED GOWING, OF SACKET HARBOR, NEW YORK, ASSIGNOR or on E-nALr To J ERoME B. RosEBooM, or NOGALES, ARIZONA TERRITORY.

PRorELLER.

Specification of Letters Patent.

Application filed January 16, 1907. Serial No. 352,636. I

To all whom may concern:

Be it known that I, FRED J. Gowmo, a

citizen of the United States, residing at mvention relates particularly to a two-blade pro eller for use in driving and operating ig -speed vessels.

The object of the invention is to provide a propeller wheel which is simple, strong, effective and inexpensive, and wherein a greater amount of power may be obtained and therefore a greater speed may be imparted to a boat or like craft, at the expenditure of less fuel and energy than by the use of any other device of the class.

A further object is to provide a propeller which will operate with greater steadiness, higher speed, and with less sli or loss of effective propelling power than t e old forms of wheels, and a further object is to provide a wheel of the class wherein its peculiar design and structure renders it possible to greatly increase the size and lead of the blades, without necessitating any increase in the driving power.

The various features and parts of my invention will be understood from the detail description which follows, as well as by reference to the accompanying drawing,

which forms a in which Figure 1 is a sidev elevation, showing my ropeller applied to the stern of a boat. ig. 2 is a rear view of the propeller, taken on the line 22 of Fig. 1, showing the peculiar form of the blades. Fig. 3 is a sectional View of one of the blades taken on the line 3-3 of Fig. 2, showing a slight curve in the outer end of blade. showing the great lead or angle of the blades. Fig. 5 is a section on the line 5-5 of Fig. 2. Fig. 6 is a section on the line 6-6 of Fig. 2. Fig. 7 is a section on the line 7'7 of Fig. 2. Fig. 8 is a section on the line 88 of Fig. 2.

, Similar characters of reference are assigned part of thisspecification, and

Fig. 4 is a plan view,'

to corresponding parts throughout the several figuresi V Inthe drawing, I have shown. a propeller Wheel having two blades A and B, which are preferably formed integrally with a central ub 0, having a circular hole D through its center, for use in applying the wheel to a driving shaft E, which may be-operated by any so'urceof power, such as an engine or motor. v I

F, F represent the cutting or leading edges of the respective blades. These are formed sharp and substantially straight away from or tangent to the outer curved surface of the hub, extending thus for a distance equal to nearly the whole length of the blades. The cutting edges of the blades, it will be observed, extend to and are even or in line with the face of the inner end of the hub, and they are substantiall at right angles to the axis of the hub or w eel. The trailing edge G of each blade is formed in a large irregular curve, but the middle of the blades does not extend rearwardly beyond the outer end of the hub. The outer half of each blade is only slightly curved or dished, as shown in Fig. 3, while the other portion of the blade next to the hub is twisted or curved into almost a half circle. The inner end of the blades, where they are joined to the hub, preferably extend the full length of the hub, and each blade from the point H at the front end of the hub to the point I at the rear end of the hub describes a spiral line or command curve extending half way around the u 7 Under the construction of my wheel, there are no shoulders or corners in the vicinity of the hub to be exposed to the water and thereby offer resistance to the forward or rotary movement of the wheel.

When my wheel is applied to a boat and set in motion, the long straight leading edges F of the blades cut the water throughout l be a d-the wheel center; but the saidvacnum only lasts for an instant, 'or' long enough for Ithe Water/displaced by the' blades toibe' lvfor c ed into the hollow space, after which a .constant' ;-s'tr 'eam*'of water Will flow rear n r n,

the-blades-at or near theizpoints fDur fh lyladgfof y propeller are made very 65 1 J1g' ijth8-. operation of 1 the 1 wheel, owing to thepeculiar formi-and disposition of the;

blades',=hayi-1ig "the long straight cutting or leading, edges, t'h'ere is practically no churning 3 of the water aslt'h efwheel' revolves, and thereis apparently no slipor loss-of motion,

such'j aslcommonlygo'ceurwhere "the; older eliininationofresistanceand slipping.'

"'When my Wheel". is first set in motion and the boat begins to movezforward, there is an;

makes of propellers are 'usedQ. My,- wheel .is

thei'elic'ire."more powerful, and" capable ofdriving a'boat at higher speed because of the ap' arent vacuum 'orfivoid formed directly referredto plays a'very'imp'ortant part in the successful. operation of'iny propeller, for

v the reason that; it affords a I ready and placed-f by the'propeller blades; which 'r eeffective" way 10f disposing of the water disquire some such mean s 'for its disposition in order'-, tfo"prevent the churning ofthewater andfthe consequent retarding ofIthe' moveinht of the vessel by reason o'f the'loss of effective propelling power a11d" tlie"1eSiSt ance heretofore ;1*eferred to. My, experience lsho ws that; a propeller which'operates in water. which is constantly churning or boilmg; impartsless power to a boat, than when the water-is simply. cjut'and then discharged asternjin a direct ma'nner f-ro1n the centerof:

the wheel,;;in a steady 'streamleq'ual to the volume"v displaced and under conditions of least-resistance as described. The "vacuuni-like spacewhich occurs behind the hub ofth'e Wheel-at, the instant the boat starts forward, affords a receptacle into which the water may be forced in the iirst'place without encountering any resistance, andafter the "currents 'of-water begin to fill the saidvoid,

it will thereafter continue to flow astern in a Y steady' andfifreestream, with practically no increase ofresistance as the speed of the boat craft.

' principal objects of iny invention to provide a wheel which will' eilectually remedy this annoying and injurious defect. Tothis end,

- Owing tothe manner in wh genera ly in use.-

peller, but three or four bl 'ploye'dwith good" results; although-for high speed boats,-in connection withwhich I intend-to use my wheeLl prefer to employ only There are few-power driven or propelled boats in whichthe vibration and jar from the propellingmechanism is not plainly felt by theoccupants, no matter where they.- chance to sit .or stand, 'and it is one of the {nearly the same width for at least the length of the straight cutting edges, and that feature,

taken with the gradually increasing concavity or dishin of the blades from their tips Ktoitheipoint where they are joined to the hub,- causesthewheel to. rotate in a steady manner,without any-perceptible vibration or chatter, and thereby produces an eflectwhich is not only very pleasing and desirable, but which also prevents racking j and Otherwise injuring the craft.

- {During th rotation of bladesA and B, the

water-displacedby them-is carried orflows 7 across the blades 111 substantially the course indicated by the arrows J ,shownin Fig. 2.

It will be observed that blades A and B, .Where'they are joined toj-the hub, have a greater width than the lengthgofthe hub, V

because they are disposed or formed in a spiral line.- This feature is, of greatimpor'tance, becauseit not only'adds strength Wiseyielding tov the great strain resulting .from their being driven through the water at ahigh rate of-s-peed. 4 I

air-totem and dispose the parts oflmy' propeller,-the

blades are capable of being applied to the 'hub' at an angle whichwillgi-ve a lead nearly 'one-third'gr'eater than [find on" an of the wheels now in use; and by reason'of the fact to the blades, butit'also serves to prevent the blades from vibrating, wabbling, or otherthat my blades-are made-bro'ader 'and longer proportionally than the others; they exert a greater propelling power, operate more steadily and evenly, an'd from'actual testsof my wheel, V in. connection with the same "engine and bOat Iha-ve been jablevto" reduce the 4 runn ng tlmeover a -measured course at least thirty er cent, ascOrnp'aTed the Wheels I I'have shown. but two; on pro-i.

[this maybe emtwo blades constructed and applied as herein operation.

shown and described, asthey areafdapte'd for operation-at higher speed, because they -offer r less resistance and therefore require i'lighter engines and lessvfuel and'energy for their It is obvious that some changes or modifications may bemade in the .,stru'cture or form ofjniy' wheel, without de arting from the spirit of theinvention, and vtherefore do not restrict myself to-the precise construc-=- tionand arrangement as herein-shown and described. f l

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is j 1 1 Atwo blade propeller, comprising a central hub, and a pair of oppositely disposed c0nling from at or near the tips thereof to the caved blades, the said-blades having a long points where they are joined to the hub. 10 straight cutting 'edge extending at right I In testimony whereof I affix my signature angles to and flush or in the same plane with in presence of two witnesses.

one end of. said hub, and having a widtlr' FRED J. GOWING. greater than the length of said hub for a dis Witnesses: tance equal to the length of said cutting edges, EDGAR V. BLOODOUGII,

the concavity of said blades grsduallyincreas- WM. KL Mor'r.

Images