US1047872A - Feathering-propeller. - Google Patents

Description

A. M. AKERMAN. FBATHERING PROPELLER. APPLIOATION PILBD FEB.3,1912.

1,047,872, l Patented Dec. 17,1912

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EATHERN'GMROPELLER,

Specification of Letters Patent.

Patented Dec. l?, i912.

.Application lle February E, 1912. Serial No. 675,280.

. To aZZ 'whom t may concern:

' of construction, operation, control and adyso justment.

Vith these objects in viev:r my invention consists in the novel construction, combination and, arrangement of parts hereinafter described in detail, illustrated in the accom panyingr drawing and particularly pointed out in the appended claim.

ln the drawing-Figure l is tcp plan view of a section of the stern of a boat or vessel with my invention applied thereto, being also a section on line l-l of Fig. l. Fig. 2 is a vertical section online'2-2 of Fig'. 1. Fig. 3 is an enlarged vertical section, partly broken away, of the mechanism -lor turning' the blades of .the propeller or paddle Wheel. Fig. Il, is an enlarged top plan View of substantially the parts shown in Fig. 3, with the cover removed and the sleeve secured to said. cover shown in secn tion, or a section on line 4 4 'of Fig. S. Fig. 5 is a section taken substantially on line 5-5 of Fig. 3. y

. In the several views, 2 represents the hull or body of a boatvor vessel, 3 the propeller shaft and d the counter-shaft driven by any suitable means and operatively connected with the propeller sha'ltby bevel-gears 51 7. On the shaft 3 is mounted a sleeve l0 which is supported vertically by a Worm-r Wheel l1 keyed to the upperend of said sleeve. This sleeve is movable vertically on said sha-ft 3 by means of a belleranl lever l2 fulcrumed at 13 on the bearings.,- l', said lever v.having a fork lei which engages annular groove 15 inthe sleeve lil. vllie .bell-crank lever 12 is operated by a rod 16 pivote-d to said lever at 17 and extending to suitable operators stat-ion. The Sleeve l0 is revolubly adjusted about the axisof. the shaft 3 by means of a. Worin i8' that enf ,enges the Worm-wheel l1, said Worin being keyed 'to a shaft i9 having keyed thereon 'a drum 2Q onvvliich. is Wound a steering` rope or cable having); runs 2l and 22 running' over pulleys 23 and 24: to the operating stationv on'the vessel (not shown).

@n the sleeve 10, near its lower end, is.

secured cover 25 havinga downwardly ex'- tenfling' annular ilange 26 which tits into a cylindrical chamber or box 27 keyed to the Thus the box 27* lower end of the shaft 3. rotates with the shaft 3 While the sleeve 10' and the ycover 25 thereon are normally sta.

tionary.

which carry blades 32 and 33, While the in* ner ends of these shafts, Within the box, have secured thereto levers 3e and 35 which are, respectively, arranged at right angles to the planes of the blades 32 and 33. These levers .are successively engaged and forced into horizontal position, as shown in Fig. 5, by a lug 3G projecting from the under-side of 'the cover 25, the timing ofthe engagement being such as to Jforce the propeller-blade into a vertical and operative position during apart of its revolution away from the vessel When it is to be propelled forwardly, or during such portion of its revolution toward the vessel when the latter.v is to be moved backvvardly. During the remainder of its cycle the propeller blade is free and is thus permitted to turn into horizontal. position and feather the Water'Whicli is facilitated `by securing'the propeller shaft above the median horizontal line of the propeller blade, as shown in Fig. l, and in accordance with the usual mounting of feathering pad' adjustment. Said Fig. o also shows a change in vertical adjustment of the disk 25 to bringits lug 36 out of reach of the levers 231iand 35 in which event the blades or pad- 1 dies will feather continuously when the. shaft rotates. This vertical adjustmentof the lng 86 also makes provision for a partial engagement with each of the respective levers so as to incline the paddle more or less between its vertical and horizontalpositions and thereby vary the eifectiveness of its propelling power lbetween its maximum capacity in vertical position to its feathering position. By this means the speed of the vessel may bev controlled without varying the speed of the engine driving,` the shaft 3. The dotted lines in Fig. Ll indicate dierent positions of the lug 36. As shown in Fig. 5, the flange 26 is made wide enough to be engagedwith the box 27 when the ,lng is raised sufiieiently high to permit the nps'tanding levers 34 and 35 to pass underneath it without touching it. Thev number oi -paddles that may be employed isV not llim d to two, although for the purpose of iilnstrating the invention 20, shaft 19, worm 18 and worm-gear 1i. W hen it is desired to vary the speed without varying the speed of the engine driving the shaft 1G the disk or cover 25 will be suitably elevated from normal position, or lowered toward said position, by manipulation oi' the .rod 16, or connectionv therewith, the bellcrank 12 and its forli l5 engaging the groove l5 in the upper end of the sleeve l0.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The combination with a rotary shaft, of blades or paddles rotated or revolved by said shaft, said blades or paddles being mounted to face and move edgewise through' their path of movement, means 'for temporar-ily locking the blades in the'aoing position, means for varying the looking means to cause same tolorl(L the blades in an inclined position relative to their path of movement and for releasing said blades or l paddles entirely from said looking means, and means for shitting the looking means to different positions radially from said shaft.

In testimony whereof l: have hereunto set my hand in the presence or" two subscribing witnesses.

AXEL M. AKERMAN. Witnesses v JULiA M. Ban-iron, d. W. Bnoiisrnoixr.

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