US1434581A

US1434581A - Disappearing propeller device

Info

Publication number: US1434581A
Application number: US552330A
Authority: US
Inventors: Henry R Astridge
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-04-13
Filing date: 1922-04-13
Publication date: 1922-11-07
Anticipated expiration: 1939-11-07

Description

Patented Nov. 7, 1922..

UNITED STATES HENRY R. ASTRIDGE, or TORONTO, ONTARIO, CANADA.

DISAPPEARING PROI ELLER DEVICE.

Application filed April 13, 1922. Serial No. 552,330.

T 0 all to ham it may concern Be it known that I, HENRY R. As'rnrnen, of the city of Toronto, in the county of York, Province of Ontario. Canada, a subject of the King of Great Britain, have invented certain new and useful Improvements in Disappearing Propeller Devices, of which the following is a specification.

This invention relates to devices such as shown and described in United States Letters Patent No. 1,225,252, of May 8th, 1917.

In this device a casing is provided open at its under side and adapted to receive and house a propeller and propeller shaft. A motor crank shaft is journalled in one end of the casing, and the propeller shaft is connected thereto by means of a universal joint. Extending through the sides of the easing is a short rock shaft to which, within the casing, is secured a propeller shaft support having a sliding engagementwith the propeller shaft.

The propeller shaft is raised and lowered by the oscillation of the rock shaft.

The tendency is, when the boat is running, for the propeller and propeller shaft to lift, and means must therefore be provided to hold them down, but such means must not interfere with the movement of the parts when the skeg of the propeller shaft supporting device strikes an obstruction tending to lift it. My object therefore is t devise simple, effective and easily adjustable means for actuating the propeller supporting device and for frictionally retaining it in any desired position.

I attain my object by means of the con structions hereinafter described and illustrated in the accompanying drawings in which I v Fig. 1 is a side elevation, partly in section, of a motor attachment constructed in accordance with my invention:

Fig. .2' is a side elevation on a larger scale of part of the same showing particularly the frictional retaining means for the hand lever; and

Fig. 3 a cross section of these parts on the same scale.

In the drawings like numerals of reference indicate corresponding parts in the different figures.

1 is a casing of the device open at its under side and adapted to receive the propeller shaft 2 and propeller 3. The crank shaft 4 of the motor extends through the forward end of the casing 1, which is provided with a suitable stufling box 5. i/Vithin the casing, the crank shaft is connected to the propeller shaft by means of a universal joint 6. The propeller shaft is carried, so that it may be raised or lowered, by the propeller shaft support 7. This shaft sup port is pivotally supported within the casing by means f the rock shaft 8 hereinafter more particularly described. The rearward end of the support carries a suitable bearing 9 for the propeller shaft. Preferably the support 7 is double, passing on each side of the propeller shaft, and the bearing 9 is hung on a pivot 10 between the two parts of the support. The bearing turns on this pivot as the propeller shaft is raised or lowered, and at the same time slides longitudinally of the shaft.

At the junction of the two parts of the support 7 an open bearing 11 is formed. which receives the propeller shaft when the latter is in its lowest position.

To protect the propeller I provide the skeg 12 which extends rearwardly from the support 7 below the bearing 11.

The rock shaft 8, it will be noted, extends through openings in the opposite sides of the casing 1, which openings are surrounded by the smiling boxes 13 and 1 1, the sides of the casing forming the bottoms of these boxes. One end of the rock shaft is provided with an enlargement 15, preferably integral with the shaft, which forms a gland for the stuffing box 13. The stuffing box l i is provided with a gland 16, which is adapted to be set up by a nut 17 threaded on the end 18 of the rock shaft. The center 19 of the rock shaft, it will be seen, is squared or otherwise shaped to have a non-rotative engagement with the propeller shaft support? and, as the end 18 of the rock shaft is smaller than this squared portion of the shaft, the rock shaft is readily engaged with the said support by pushing it through the latter from left to right, as viewed in Fig. 3, by setting up the nut 17 without producing unduestrain against the sides of the casing. To the end 15 of the rock shaft I secure a brake drum 20. preferably connection is effected by means of a cap screw 21, passing through the end of the drum and threaded in the enlarged end 15 of the rock shaft.

Que or more dowels 22, fitting in alined holes n both the end of the drum and the end of the rock shaft, prevent rotary movement of the drum relative to the rock shaft.

On the sides of the casing; adjacent the drum, and preferably diametrically opposite one another. are formed the lugs 23. To one of these lugs are secured the ends of the halves 24 of a brake band 31 preferably by lane of a bolt 25 extending through the lug and the ends of the brake band. Through the other lug; and the other ends of the halves of the brake band extends the bolt One end of this is provided with a wing nut 52. whereby the bolt ma be caused to tighten the brake band upon the drum to a v extent desired. The other end of the be t has a cam lever 28 pivoted thereon, which is operable to quickly release the pressure of the brake band whenever desired. in operating handle 29 is secured to the end of the brake drum preferably by means of the cap screw 21, which secures the brake drum to the rock shaft. This operating handle or lever is fitted between the lugs 30 formed on'the brake drum which thus prevent relative rotation of the handle of the drum.

It is evident that the rock shaft may be actuated. by means of this handle to throw the propeller shaft up or down, as desired. l /hen the propeller shaft is down, it may be held down against any normal upward pressure by suitably tightening the wing nut 27. As only frictional resistance is opposed to the upward movement of the propeller shaft support and propeller, the support is readily pushed up by contact of the slreg of the shaft support with an obstruction. To facilitate the raising of the propeller shaft by means of the operating' handle 29, the cam lever 28 may be pulled up and the pres sure of the brake band thus released.

llhat ll claim as myinvention is 1. In a motor attachment for beats the combination of casing open at its under side and adapted to receive and house a propeller and propeller shaft; a propeller shaft and propeller adapted to be raised and lowered; a propeller shaft support adapted to ise and lower the propeller shaft; a rock shaft journalled in the sides of the easing, said shaft being adapted to actuate the propeller shaft support; a friction drum on one end of said rock shaft; and an adjustable brake band connected with said casing and. engaging said friction drum.

2. In a motor attachment for boats, the combination of a casing open at its underside and adapted to receive and house a propeller and propeller shaft; a. propeller shaft and propeller adapted to raise and lower the propeller shaft; a rock shaft journalled in the sides of the casing, said shaft being adapted to actuate the propeller shaft support; a friction drum on one end of said rock shaft; two lugs on said casing at opposite sides of said drum; two half brake bands pivotally connected to one of said lugs; and an adjusting bolt extending through the other lug; and the other ends of said brake band.

3. in a motor attachment for boats, the combination of a casing; open at its underside and adapted to receive and house a propeller and propeller shaft; a propeller shaft and propeller adapted to be raised and lowered; a propeller shaft support adapted to raise and lower the propeller shaft; a rock shaft journalled in the sides of the casing, said shaft being; adapted to actuate the propeller shaft support; a stufling box formed at each side of the casing through which said shaft passes; a fixed gland formed at one end of the rock shaft cooperating with one stuffing box; an adjustable gland for the other stui hnn box carried by the shaft; a friction drum secured to the end of the shaft formed with the fixed gland; and an adjustable bralre band connected with said casing and (311g: ring said friction drum.

4;. in a motor attachment for beats, the combination of a casing open at its underside and adapted to receive and house a propeller and propeller shaft; a propeller shaft and propeller adapted to raise and lower the propcllci shaft; a rock shaft iournalled in the sides of the casing, said shaft being adapted to actuate the propeller shaft sup port; a friction drum on one end of said roclr shaft; two luo's on said casing at oppo site sides of said d ruin; two half brake bands pivotal-1y connected to one of said lugs; and an adjusting bolt extending through the other lug and the other ends of said brake bands l bolt being; provided with nut at one c and cam lever at the other.

at Toronto. Canada this 7th day HENRY E. ASTRIDGE.