US802602A

US802602A - Propeller for boats.

Info

Publication number: US802602A
Application number: US21592304A
Authority: US
Inventors: Herman S Searle
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-07-09
Filing date: 1904-07-09
Publication date: 1905-10-24
Anticipated expiration: 1922-10-24

Description

No. 802,602. PATENTED 06124:, 1905. H. S. SBARLE.

PROPELLER FOR BOATS.

APPLICATION FILED JULY 9, 1904.

2 SHEETS-SHEET l.

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No. 802,602. PATENTED 001224, 1905. H. S. SEARLE.

PROPELLER FOR BOATS.

APPLICATION FILED JULY 9, 1904.

2 SHEBTSSHEET 2.

NlTED STATES PATENT OFFICE.

PROPELLER' FOR BOATS.

Specification of Letters Patent.

Patented Oct. 24, 1905.

Application filed July 9, 1904. Serial No. 215,923.

To (all whom it may concern.-

Be it known that I, HERMAN S. SEARLE, of Rochester, in the county of Monroe and State of New York, have invented a new and useful Improvement in Propellers for Boats, which improvement is fully set forth in the following specification and shown in the accompanying drawings.

My invention relates to boat propulsion by means of revolving paddles, the invention being an improved paddle-propeller to be attached at the sides of the boat.

The main object of the invention is to construct the paddles so as to turn in their respective bearings in the shaft and to provide simple means for turning them automatically at intervals on their axes as they are collectively carried around by the revolving shaft to cause the blades of the paddles to alternately present their faces and their edges to the Water.

Other objects and advantages of the invention will be brought out and made to appear in the following specification and the construction particularly pointed out in the appended claims, reference being had to the accompanying drawings, which, with the reference characters marked thereon, form a part of the specification.

Figure 1 is a side elevation of my improved paddle-propeller. Fig. 2 is an end view of the rigid boxing for the shaft, seen as indicated by arrow 2 in Fig. 1, the shaft and the paddles being omitted. Fig. 3 is an end view of the propeller, seen as indicated by arrow 2 in Fig. 1. Fig. 1 is a side elevation of parts near the outer end of a boxing, a part being axially sectional and broken away. Figs. 5 to 8 are side elevations of the paddle-head and parts of the boxing occupying different relative positions, parts being omitted and one paddle cross-sectioned near the boxing. Fig. 9 is a side elevation of a part of the shaft and associated parts, the boxing and a part of the paddle-head being in longitudinal axial sec tion and parts broken away. Fig. 10 is a similar side elevation of the shaft and other parts, the paddle being shown in a relatively difi'er ent position from that shown in Fig. 9. Fig. 11 is an end view of the propeller with parts broken away, the paddle-head being transversely sectioned through the axes of the paddles on the dotted line 11 11 in Fig. 8. Fig.

12 shows an outline plan of a boat with my improved propellers attached in place thereon.

Figs. 1, 3, and 12 are drawn to scales smaller than those of the other figures.

Referring to the parts shown, A is a hollow cylindrical or tubular metallic body constituting a holder or boxing for the inclosed revolving paddle-shaft B.

C, Figs. 1 and 3, represents a series of independentpaddles held or carried by the shaft B to overhang the end of the boxing A, as shown, the paddles being mounted radially in an enlarged part or head 6 of the shaft. Two or more of these boxings, in pairs, each boxing with its shaft and set of paddles, are employed on a boat D, as shown in Fig. 12. The boxings are placed horizontally in the hull or body of the boat with their ends projecting a short distance from the sides of the boat, the axes of the boxings being in vertical planes at right angles with the axis of the longitudinal center line of the hull. In mounting these boxings they are made rigid with the body of the boat and so placed on the two sides of the boat that the boxings of each pair in transverse lines shall be opposite and coaxial, as shown.

The paddles C are designed to turn intermittently on their respective axes in their bearings a in the heads I) of the various shafts B, each paddle turning at each movement through an angle of ninety degrees. These intermittent axial motions of the paddles in their bearings are for the purpose of causing the blades on of the paddles to successively present their broadsides and their edges to the water as the shafts are revolved, these relative positions of the paddles being clearly shown in Figs. 1 and 3. The axes of the pad dles are in a plane at right angles with the shaft B, and the manner of holding the spindles 0 of the paddles by the head I) so as to turn therein is clearly shown in Figs. 9 and 11. The bearings (Z of the spindles in the head are preferably made slightly tapering, though this is not essential to the invention, the spindles being held to place in the head or prevented from moving longitudinally out of the head by some convenient and wellknown means, as screw-nuts a threaded onto their extreme inner ends, as shown. \Vhile these nuts do not interfere with easy axial motions of the spindles in their hearings in the head, they prevent the paddles becoming detached from the shaft B. For the purpose of automatically turning the spindles in their hearings in the head 6 as the shaft B revolves the outer end of the boxingA is formed with an expanded part or bell f, comprising a pair of circular concentric ring-sections g 21, divided or terminated by radial openings or channels is It. (See Fig. 2.) Within the ringsection g is a supporting ring-section h of rectangular cross-section, as shown, aiding to stiffen said ring-section 9. Within the ringsections M the bell f of the boxingAis formed with a plain annular surface Z at right angles with the axis of the boxing, the ring-sections g and 2' projecting equally longitudinally beyond this surface, as appears in Fig.4. The low ringsection it is in one piece with the outer heavy ring-section g and projects longitudinally from the surface Z only about half the distance, as shown. The outer and inner radii of the ring-section it are equal to the corresponding radii of the ring-section d, the outer radius of the latter ring-section being equal to the inner radius of the ring-section g, these matters being clearly shown in Figs. 2 and 4. hen the shaft Bis in place in the boxing A, the inner annular surface of the head Z) meets the equal annular surface 5 of the boxing, the head filling the circular space within the opposing ring-sections 7L 6, as appears in Figs. 3 and 11, all the ring-sections overhanging the adjacent part of the head.

Each paddle-spindle c is formed with a pair of short projecting rectangular bars or spurs n 0, adjacent and crossing each other at right angles, the planes of the spurs being at right angles with the axis of the spindle. The inner spur 0 of each pair rests against the convex surface of the paddle-head b and is opposite the ring-section 2', while the outer spur n is opposite the outer ring-section g, as clearly appears in Figs. 9, 10, and 11. As the shaft B is revolved in the boxing the projecting ends of the spurs successively encounter the ends of the ring-sections g 2', respectively, which cause the spindles to turn through quarter-revolutions at each movement, causing the blades m of the paddles C to present their flat faces or their edges to the water, as the case may be. This intermitted turning of the paddles, with their blades, in their seats in the head 5 will be readily understood by inspecting Figs. 5 to 8, inclusive.

Fig. 5 shows the position of the parts relative with the boxing A when the paddle is broadside to the water and doing duty, one end of the outer spur n overlapping the ringsection 2' and the side of the inner spur 0 bearing evenly against the face of the ring-section The turning of the shaft will bring the outer spur n against the end of the ringsection 9, causing the spindle to turn in the head Z), as indicated in Fig. 6, the parts finally taking the positions shown in Fig. 7 In these relative positions of the parts the blade of the paddle is edgewise to the water and performing no service, the spindle having been turned through a one-fourth revolution,

with the long side of the spur 92 evenly against the face of the ring-section g. In this position of the paddle one projecting end of the inner spur 0 is in under the ring-section g and moving in the annular space Within it, this position of the spurs relative with the parts of the bell f being clearly shown in Fig. 9. A continued revolving of the shaft will cause the approaching covered end of the inner spur 0 to encounter the end of the ringsectiont' and again turn the spindle, as appears in Fig. 8, it finally assuming the original position shown in Fig. 5, the paddle being again brought into position of service, with a long edge or side of the spur 0 resting fiat against the face of the ring-section vi. The continuous revolving of the paddle-shaft in the boxing will cause all the paddles to be turned, as described, as they are brought in succession around to the openings k, dividing the ring-sections g 71, causing each paddle to alternately present its face and its edge to the Water.

Whether there are two or more of the openings A: through the ring-sections g h 2 is not essential to this invention, nor is it material to the invention as to what points or places in the revolutions of the paddles they are caused to turn on their axes to beat the water or cut idly through it, these being matters depending upon circumstances and to be determined by the judgment of the manufacturer or user. The essential idea as to this feature of the invention is to at such times and in such manner shift the paddles that they will yield the best results from the power consumed. It is, further, clearly not essential to this invention that any given number of paddles be associated with a single shaft B. Four, more or less, may be employed, four being shown in the drawings as a matter of convenience.

Nor is it essential to the invention that the paddle-shafts B be revolved by any particular means. I have shown sprockets E on the inner ends of the shafts to be turned by chains in some manner that is common and well known in this class of machinery. It is designed to have the construction such that the propellers at the two sides of the boat may be driven independently, so to be turned simultaneously in opposite directions for the purpose of swinging the boat around, as it were, upon a central vertical axis.

lVhat I claim as my invention, and desire to secure by Letters Patent, is

l. A propeller for boats, comprising a rotatory shaft, a series of paddles carried thereby the axes of the paddles being radial and in a plane at right angles to the axis of the shaft, a shaft-casing having its outer end formed with an expanded part with a pair of circular concentric ring-sections divided by radial openings and a supporting ring-section within one of said sections and the other formed with a plain annular, surface, and

soaeoa spurs crossing each other at right angles on the spindles of the paddles adapted to overlap the supporting ring-section and to cooperate with said ring-sections and said radial openings.

2. A propeller for boats, comprising a rotatory shaft, a series of paddles carried thereby the axes of the paddles being radial and in a plane at right angles to the axis of the shaft, the paddle-spindles being support-ed solely at their inner ends by the said shaft, a shaft-casing having its outer end formed with an expanded part with a pair of circular concentric ring-sections divided by radial openings and a supporting ring-section within one of said sections and the other formed with a plain annular surface, and spurs crossing each other at right angles on the spindles of the paddles adapted to overlap the supporting ring-section and to cooperate with said ring-section and said radial openings.

3. A propeller for boats, comprising a rotatory shaft, a series of paddles carried thereby the axes of the paddles being radial and in a plane at right angles to the axis of the shaft, the paddle-spindles being supported solely at their inner ends by the said shaft, a shaft-casing having its outer end formed with an expanded part with a pair of circular concentric ring-sections divided by radial openings and a supporting ring-section within one of said sections and the other formed with a plain annular surface, said shaft having an enlarged head abutting said plane surface within said enlargement of the casing.

In witness whereof I have hereunto set my hand, this 7th day of July, 190%, in the presence of two subscribing witnesses;

HERMAN S. SEARLE.

Witnesses:

ENOS B. WHITMORE, MINNIE SMITH.