US912198A - Propelling mechanism for boats. - Google Patents

Description

J. T. STAFFORD.

PROPELLING MECHANISM FOR BOATS. APPLIOATION FILED JUNE 30,1908.

' 912 198, I Patented F6119, 1909.

-gaw N 1 I glvwamioz unr'ran JAMES T. STAFFORD, OF NEW YORK, N. Y.

PRQPELLING- IiiEGHANISTt/I BOATS.

Application filed June 30,

T 0 all whom it may concern:

Be it lZIlOWIl that 1, James '1. S'riisroj citizen of the U 'tcd States of Ame 1 a: siding at New Yo in the c nty of blah York and State of 1\ CW lo ,3, have invented new and useful Improvements in Propeiling Mechanisms for Boats, of which thefollowing is a specification.

My invention relates to improvements in propelling mechanisms for boats, and its pri mary object is the provision of a mechanism of this character which is designed to permit twin r0 ellers to be driven from a single on gine s 1a t, whereby to sim lify the construction and cost of such mec 1:11118111 and to reduce to the minimum the number of engines necessary to propel a boat.

A further object of the invention is the revision of a simple, durable and efficient oundation for the propelling mechanism.

With the above and othe objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter fully described, claimed and illustrated.

In the accompanying drawing, l igure 1 is a'top plan View of a propelling mechanism constructed in accordance with my invention. Fig. 2 is a view in end elevation thereof. Fig. 3 is a View in side elevation thereof. Fig. fl is a sectional view of a modified construction of the inion or gear wheel.

Referring to t 9 drawing by reference nu merals,, 1 designates a fragmentary portion of the bottom and'2 a fragmentary portion of the stern of a boat of the usual form and construction. A plurality of relatively spaced beams or girders 3 are secured to the bottom 1 of the boat and extend trnasvcrsely thereof. The foundation for the propelling mechanism is mounted upon the beams or girders 3 and consists of integral 'i' and U-shaped structures. The T -shaped structure comprises a transversely disposed member 4 and a forwardly extending longitudinally disposed member 5, while the U-shaped structurecom rises a transversely disposed mcmher 6 an longitudinally disposed rearwardly extending members 7. The longitudinally disposed member 5 of the T-sh apcd structure is arranged in a plane extending centrally and longitudinally through the boat, and the longitudinally disposed meml'iers 7 of the U- shapcd structure are disposed i n parallel planes equally spaced from the plane of the member 5. Each of the members of the Specification of Letters Patent.

Patented Fen-e, is'oe.

1.)08. Serial No. MLG'TQ.

l foundation ce sists of a base 8, a web 9 and a The 1 ases 8 of the members land 6 while the h cads 10 thereof are space ihe foundation is se- 1 head 10.

are united, relatively propeller vdi els 16 securedthereto. Pinions 17 are fined on the propeller shafts 12 and enter the space between the heads 10 of the members 4 and 6. A single engine shaft 18 is journaled in bearings 19, 20-and 21. The bearing 19 is secured to the head of the mem: her a of the T-shaped structure, the bearing 2]. being secured to the head of the member 6 of the T-sha ed structure. A gear wheel 22 is fixed on t 1e engine shaft 18 and meshes with the pinion 1 7 1n Pg. 1 of the drawing, 1 have disclosed a modified form of the pinion or-gear wheel and, by reference to this figure, it will be'seen that the pinion or gear wheel comprises a periphery 23 which is provided with a plurality of dove-tailed recesses 24, the recesses openin out through one side of the inion or gear w ieel. Teeth 25 are provi ed with dove-tailed extensions 26 which are adapted to be received by'the recesses 24. The teeth 25 are secured within the recesses through the medium of an annular member 27 which is secured in a lied position by means of bolts 28. As the teeth of the pinion 0r gear wheel are removably secured in applied position, one or more of the teeth may be tooth or teeth 'being substituted for the removed tooth or teeth.

The connection between the engine shaft and the )ropeller shaft is such that the rotation of the former will simultaneously rotate the propeller wl'iecls 16. As the gear 22 is larger than the gear 17, the propellers are driven at high speed by a comparatively slow rotation of the engine shaft 18.

The use of a single engine. shaft to drive a plurality of propellers, permits the reduction of the number of engines necessary to propel a boat at high speed and affects a correspondcured to the learns or girders 3 by means ofremoved when unfit for further use, a new ing saving in fuel. and water. The construction in the propeller mechanism is such to prevent the engine shaft 18 from being spirally twisted.

- Itshould be apparent from the above description taken in connection with ;the accompanying drawings I provide a propeller mechanism which is simple of con-- struction which may be manufactured and.

sold. at s compnratievl'y low cost, and which. may he applied to a host of any construction.

Uh enges in the form, proportion and minor details of construction may he {112M191 w iin the scope of the claim without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus described the ii'ivention, wltl'nt is claimed as new, is

A host comprising a T shaped structure consisting of a trensversely disposedmember and e forwardly extending longitudinally disposed member, 21, U-sheped structure consisting of a transversely disposed memh er and rearwardly extending longitudinally dismelee posed members, bearings secured to the transversely disposed member of the T- shaped structure and to the longitudinally disposed members of the QU-shaped structure, shafts journeled in the hearings, propeller wh eels secured to the shafts, pioions secured to the shafts and disposed between the transversely disposed members of the structures, hearings secured. to the trensversely'dis osed nemhers of the structures and to the engit'udinelly disposed members of the T-shsped structure, a, shaft journeled in the hearings, and a pinion mounted on the shaft and meshing with the firstmsmed pinions, said last named pinion being also arranged hetween the transversely disposed members of the structures.

In testimony whereof I affix my [signature in presence of two witnesses.

JAMES T. STAFFORD.

Witnesses FRANKIE MArrE,

Josnrn UNKELBAer-r.

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