US1671387A - Outboard-motor installation - Google Patents

Description

May 29, 1928. 1,671,387

E. W. TROTMAN OUTBO ARD MOTOR INSTALLATION Filed Nov. 15, 1327 5 Sheets$heet l E. W. TROTMAN OUTBOARD MQTQR INSTALLATION May 29, 1928.

3 Sheets-Sheet 2 Filed Nov. 15, 1927 May 29, 1928. 1,671,387

E. W. TROTMAN OUTBOARD MOTOR INSTALLATION FiledNov. 15, 1927 3 Sheets-Sheet 5 Patented May 29, 1928.

- .UmTEmjsTAr-Es 4 1,671,381 PA rl-zur OFFICE. 7

nnwaan WILLIAM rnornmn, or wonvnnnmrron, ENGLAND.

ournoaan moron ms'ranmrr'ou.

Application filed November 15, 1927, Serial No. 238,884, and in Great Britain November 27,.1'1986. I 1 a- This invention relates to outboard motor installations, of the kind in which the power portion has a vertically arranged crankshaft (or substantially so) with one or more cylinders radial thereto and constitutes a unit which is detachably connected with another unit beneath it for attachment to a boat and supporting the transmission shaft and propeller. I I

It has previously been proposed to provide on the lower unit arms having at their ends hinged clamping bows adapted to gri around the outer ends of the respective cy inders. Alignment of the two units was ensured by the bearing boss forthe crankshaft are connected by fasteners, each comprising a number of parts, of which one is fixed to one unit and, in effecting the locking, is

adapted by a vertical movement to enter another part of the fastener which is attached to the other unit.

In the accompanying drawings, showing various methods of carrying out the invention: a A

Fi re 1 is an outline elevation of the comp ete motor, omitting all unnecessary parts,

Figures 2-8, to a larger scale than the foregoing, are fragmentary views showing various methods of connecting the power portion of the motor with the lower unit bydwhich attachment is made to the boat, an I Figure 9 is a fragmenta'ry'axial section to 46 a still larger scale showing not only an attachment means betweenthe two parts of the motor but also the means for simultaneously connecting or disconnecting the water-cooling supply.

In Figure 1, which illustrates anengine having twin opposed cylinders actuating a- 65. 3, the flywheel at 4, and a fuel tank at 5 According to this invention, the two units Y arranged above the cylinders and surroundmg the flywheel. The means by which the motor is secured to the stern of the boat-is constituted by a pair of brackets 6 arranged one on each sideof the casing 7 surrounding the engine shaft; (not shown). These brackets are of inverted U-form. adapted to engage the transom or equivalent part of the boat, the inner limbs 8 of the brackets being shorter than the outer ones and carrying clampin screws engaging the 'holes 9 to effect the xi'ng of the .motor to the boat. 7

By the present invention the power portion or unit comprising the engine and its associated parts including the fuel tank are disconnectible from the bracket and the parts carried by the latter, including the propeller and transmission gear,.the bracket with these parts being hereunder termed the lowerunit. The various methods b which the connection is made between t e two parts of the motor are illustrated in Figures 2-8 and constitute further features of the invention.

The casing 7 depends from, and, to provide for steering by swivellin the propeller,- is angularly free in a plat orm 10 which may be of the general form shown in Figures 2, 4, 7 and 8, or as in Figures 1 and 9. This platform is provided with a pivotal connection (not'shown) with the upper ends of the brackets 6, so that the motor can tilt fore and aft in the known'manner.

On its upper side is a hollow neck 11 I having a flange 12, and upon the latter rests an annular web 13 on the underside of the a crankcase 2. From this web depend pins 14 which extend through holes in the flange 12 and also into holes in the'platform 10. A tubular boss 15 on the crankcase 2 enters the hollow neck 11' forminga spigotal'register betwen the power and lower units.

The pins 141f01111 quick attachment means for the two units, and in Figure 2 they are grooved as at 16 for engagement by a coneended thumb screw 17 mounted in the edge of the platform 10. The cone end mayxexart a wedge effect on the lower side of the groove 16 to draw the parts firmly together. Thus it is only necessary to slack off the screws 17 to enable the power unit to be lifted off the lower unit, it being understood that there is a s lined or-e uivalent connection (not shown between t e engine crankshaft and the transmission.

In an aim-min method as team in Figure 8, the depending pins 14 are adapted to coaxial with the to engage nuts 32 which bear on the -toth pinch block extend into holes 18 provided'in pinch blocks 19 of a knownkind carried in the lower unit.

These pinch blocks 19 are mounted in reoesses'20 in the lower unit and have thread .7 ed extensions 21 passin through vwashers 22- closing the mouths of t e recesses,"and wingnuts 23 engage with the extensions 21' bearing on the washers'so that the depending lock and the side: of a hole 24 in the lower unit throu h which they extend into the pinch blocE. If preferred the depending I pins14 on the power head may have formed in them a depression or roove 16 where the engagles so at when the latter is tightened up t ore is a itive engagement in addition to the ictional, which revents disengagement until the ,pinch locks are slacked back to a sufiicient extent. I The pigs 14, however,-may'be plain as in alternative, and in many cases a prefarable connection, is shown in Figure 4. In this the end-of the pins, which are .somewhat shorter than before, are screw-threaded at .25 and are adapted to be engaged with what are in eflectjmion nuts 26-'having thumb grips27 and rotatably mounted on stems 28 I pins 14 and provided at their ends with lars 29'which render the nuts 26 endwise fast when tightened up. This arrangement has the advantage that the nuts cannot become detached or lost.

- It will be understood that any other equivalent quick connecting. device orv devices may be emplo ed as'an alternative. Thus, as shown in 1 and 6, slotted lugs30 maybe provi ed instead of the depending pins 14, and these lugs are arranged with studs 31 or set screws provided in the lower unit and engaged by wing lug and clamp it. The end of the wing nut which bears on the slotted lu may be cylindrical as at 33 toenter a cy 'ndrlcal recess 34 in the face of the slotted lugs. This provides a positive instead of a merely frictional engagement. 7,

In the alternative construction shown by Figure 7, a split clam ing band'35 is secured e power unit an is adapted to en'ga' v the edge .of a circular platform 36'on ti: lower unit. Atthe split it is provided with' a tangentially arranged screw 37 adapted to close the band and grip the platform 36.; Locating spring detents 38 may be employed between the band and the platform.

In Figure 8 the power unit is provided with a depending flange or a band 39 toencircle a part such as the circularvplatform 36. In this case the locking of the two units s efl'ected .by pins 40 on the part 36 engag-. mg slots inthe other part WhlOh extend first as at'41 and then circumferentially as at teams: the crankshaft "axis in the manner -of a 'ba plunger 43 carried y one part engages a recess in the other.

-- 7 As the" removal of the power portion from the lower unit would ordinarily necessitate a disconnection of the coolin water suppl pipe, the following simple joihting means i lustrated in Figure 9 may be employed. A collectin plate 44 for thewater is concenins-14' are. thereby gripped between the .trically ormed. or mounted on a sleeve 45 carrying the casing 7 surroundingv the verticaltransmission shaft 46, the sleeve being an larly movable byv an integral wheel 47 Wit a: tiller (not shown} attached thereto for controlling the propel er to steer and reonet joint. A spring verse the boat. 'In the upper face of the 1 plate 44 is a. concentric groove 48 with sides converging downwardly. .Into this groove fits either a ring, or, as shown, a block 49 (one for each cylinder) diametrically arran and of non-metallic substance such as e onite. I I

These blocks can be pressed into the groove by springs 55 constituted by forming radially extending spaced fingers on a ring of flat resilient material 56 arranged just above the plate 44, the fingers 55 hearing on the blocks. The latter carry pipe branches 50 connectedv at 51 to each cylinder jacket 52, and a passage 53 in each' lock connects with its branch and with the bottom of the groove 48 to supply to it watercollected by the plate. Statronar guides, which may be constituted by the above mentioned fingers or by projections on the plate carrying them, engage the parts 54 of the blocks to which the branches are connected to prevent the blocks mo with the plate 44 and sleeve 45v when the fitter are moved angularly for steering purposes. I When the power head is disconnected the blocks simply lift out of the oove 48, and when reconnected, they read- 11y re-enter the groove and are retained there by the springs.

The invention-thus provides for the easy separation of the'two principal parts of the motor and their re-attachment with rapidity and security.

What I- claim as my invention and desire to secure by -Letters Patent of the United States is 1. In an outboard motor installation, the combination of a power unit including a vertically arranged crankshaft, a crankcase enclosing said crankshaft and carrying a cylinadapted to enter and to be secured in a socket u n the other unit in alignment with said pm, substantially as set forth.

2. In an outboard motor installation, the combination of a power unit including a vertically arranged crankshaft, a crankcase enclosing said crankshaft and carrying a cylinder radially arrangid thereto, a second unit separate from and low the power unit adapted to be attached to a boat, a propeller and transmission mechanism carried'by the second unit, connecting means between the two units constituted y a depending part on the power unit adapted to engage a cooperating part on the other unit, a watercollecting plate located around the axis of the engine shaft, an annular groove in said collecting plate, and a block adapted to fit said annular groove attached to and forming locating means for a conduit which supplies coolin water from the annular groove to the cylin ers, substantially as set forth.

3. In an outboard motor installation, the

' combination of a power unit including a vertically arranged crankshaft, a crankcase enclosing said crankshaft, and carrying a cylinder radially arranggll thereto, a second unit separate from and ow the power unit the pin and anchored adapted to be attached to a boat, a propeller and transmission mechanism carried by the second unit, and connecting means between the two units, in which the two units are secured together by a quick fastening device comprising a pin extending from one unit and screw-threaded for engagement by a threaded socket rotatably mounted endwise fast upon the other unit in alignment with the pin, substantially as set forth.

4. In an outboard motor installation, the combination of a power unit including a vertically arranged crankshaft, a crankcase enclosing said crankshaft, and carrying a cylinder radially arranged thereto, a second unit separate from and below the power unit adapted to be attached to a boat, a propeller and transmission mechanism carried by the second unit, and connecting means between the two units, in which the fastener comprises a screw-threaded pin extending from one unit and adapted to enter a threaded socket rotatably mounted in alignment with upon the other unit, substantially as described.

In testimony whereof I have signed my name to this specification.

EDWARD WILLIAM TROTMAN.

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