US2046558A - Boat construction - Google Patents

Description

July 7, Q HUSSMAN 2,046,558

BOAT CONSTRUCTION Original Filed Aug. 22, 1931 2 Sheets-Sheet 2 E Q5 11 I 4 m 50 I ATTOR Y Patented July 7, 1936 PATENT OFFICE.

BOAT GQNSTRUCTION Carl Hussman, Chicago, 111,, assignor to United States Gypsum Company, Chicago, 11]., a corporation of Illinois Application August 22, 19.31, Serial No. 558,683 Renewed February 17, 1934 tions, in which the motors for propelling theboat are resiliently supported in order to reduce the 5 vibration of the boat when the motors are operating.

It has been proposed to utilize resilient spring clips for supporting the motor of the boat and also for taking the thrust of the propeller'shaft so as to reduce the vibration of the boat due. to operation of the motor. The present invention deals with locking down the motor rigidly as might .be desirable during rough weather, and also means for throwing a load onthe main motor supporting springs in addition to the weight of the motor itself.

An object of the present invention is to provide animprovedsupporting baseqfor the motors of a boat and to provide means for limiting the vibration or completely stopping the action of the. suppportingspring clips, asm ht be necessary during rough weather.

v.Another object of-the inventionv is ,to connect the twin resiliently supported-motorsyofia. boat to prevent undue lateral andindependentmovemem thereof. M

A further object of the inventionisto: provide a motor supporting resilient base suitablefor :permitting vibration of the motors axially of the crankshaftso as to make the use. of :aresiliently held thrust bearing unnecessary; also to improve boat constructionsin other respects hereinafter specified and'claimed.

Reference is to be had --to the accompanying drawings forming apart of' this specification, in which Fig. 1 is a plan, diagrammatic view of the boat showing portions of a power driving mechanism,

Fig. -2 is a sectional elevation on.1ine 2.-.2 showing a tie bar for connecting together-a pair of boat motors,

Fig. 3 is a plan view of a resilientbase for supporting one of the boatmotors or engines,

Fig. 4 is a fragmentary elevation of theengine base taken on line 44 of'Figure 3,

Fig. 5 is a sectional elevation of the motor base taken on line 5-5 of Figure "3,

,Fig. 6 is a sectional plan view of a portion of the engine base taken on line'6 6 ofFigure 5, Figs. 7 and 8 are sectional elevations of the motor base taken on lines l.1 audit-.8 respectively-of Fig. 4, and Fig. MS a sectional elevationofa.flexiblecou- Qpling on one of thepropeller shafts.

In theboat hull H], a series of metal angle bars II are rigidly secured to the boat frame, preferably extending longitudinally of the boat to form a support for one or more motors or engines I2. As commonly constructed, two, of the engines, I2 are provided inspaced parallel relation so as to operate a pair of propeller shafts I3 carrying propellers M on their outer ends for causing the movement of the boat. Each of the propeller shafts I3 is provided with a pair of bearing brackets l5 and I6 exterior of the boat hull, a stufling box I1, and a rigid coupling l8.

Each of said shafts is also provided with a flexible coupling 19 which comprises a pair of annular flanges 20, secured by keys 2| and set bolts 22 to the ends of the propeller shaft 13 in the case of one set of annular flanges and. to the endof a co-axially extending engine shaft 24 in the case of the other annular flange. An annular series of laminated pins 25 connects the outer edges of the flanges 20' so as to permit a lim.- ited amount of rotary relative movement between the annular flanges 20 when the motors are started and stopped so as to reducethe vibration of the boat. Annular plates 26 are secured in recesses formed on each inner face of each flange 20 and said plates have inwardly. extending, semi-circular projections 21 for co-acting one with the other to take the thrust of the propeller shaft I3. A connecting link 28 passes through the annular plates 26, being provided with enlarged heads 29 for preventing said plates 26 from separating. The inner ends of shafts l3 and 24, contact with the large heads 29 of the connecting link 28 so as to limit the axial move,

ment of said shafts. A spring wire 30 in ann n lar form engages in a recess in each of the laminated pins 25 and on each one of the annular flanges 20 so as to maintain said flexible pins 25 in position. By means of the flexible couplings shown in Fig. 9, the vibration due to the revolution of the propellers is carried directly to the motor or engine [2 and these vibrations are prevented from being transmitted to the boat. hull H) by resilient engine bases to be more fully described.

Each of the angle bars I] has a horizontally extending leg or flange 32. A metallic bar 33 ex tends parallel to and above each of the angle legs 32,..being spaced apart therefrom and, in effect, forming a mount for the mechanism subject to vibration. Resilient spring clips having central saddle members .34, integral loops 3.5, and outstanding legs 36, are positioned between the'an- .gle legs 32 and bars 33 or legs 32 in alternate arrangement best seen in Fig. 4. Blocks 3'! are secured by rivets 38 to the bars 33, so as to engage each of the saddle members 34. Stud bolts 39 are screwed into blocks 31a, and pass through bars 33 to connect to the motor base. Other rivets 40 secure the clip ends 36 to the legs 32 or bars33, as the casemay be. The spring clips thus are positioned between and resiliently conmeet the bar 33 with the angle leg 32 so as to prevent vibrations of the motor or engine being transmitted to the boat hull I0.

It has been found that the spring clips under the motors operate at the highest efiiciency from a sound and vibration insulating standpoint,"

when they are loaded with a particular and rather limited range of loading. In many instances, therefore, it is desirable to place an additional load'upon the main supporting springs over and above that occasioned by the weight of the motor itself. For this purpose of auxiliary loading, I utilize auxiliary spring clips 42 which are of the same general nature as the main spring clips. Clips 42, however, have their outstanding flanges or legs 43 securedto the lower face of the angleleg 32. A stud bolt 44 is screwed into a block 449. and through the saddle member of the clip 42, the leg 32, the bar 33 and through the motor base flange 45, the latter being secured to the bar 33 by means of bolts 44 passing through bolt holes 46. The nut 4'1 on the upper end of each of the bolts 44 may be adjusted so that the tension of the spring clips 42 throws any desired auxiliary load on the main spring clips supporting the motor so as to bring the main spring clips up to the desired loading and to their maximum efiiciency from a Vibration insulating standpoint.

In some cases, such for example as during rough weather, it is desirable to limit or entirely stop the vibration of the main spring clips for short periods to prevent undue vibration of the motors due to the pitching and rolling of the boat. For this purpose, I provide wedge blocks 48 which are secured to the lower face of the metal bar 33by means of screws 49. A wedge face 50 formed on the lower face of the block 48,-co-op erates and engages with a wedge face 5| formed upon a movable wedge block 52. Each of the bolts 44, preferably passes through an opening formed in the wedge block 48, and the wedge block 52 is preferably provided with a slot 54 to receive the bolts 44 and permit lateral movement of said block relative to said bolt.. The wedge faces 50' and 5i are preferably lined with lead or other soft material so that, when said bases are slightly separated, vibration of the motors will not produce unwonted noise.

In order to permit the lateral adjustment of the movable wedge block 52, a stud bolt 55 is screwed at one end into the block 52, and. the opposite end of said bolt 55 is provided with a threaded section 56 for receiving a pair of lock nuts 51. The bolt 55 passes through an upstanding flange 58 formed on an angle bracket 59, said bracket having a downwardly extending flange 6B secure-dby rivets Bl to the angle bar H. The

flange 58 extends between the lock nuts 51 and rigidly secures the bolt 58 and block 52 in any desired adjusted position. *A plate 62 also extends upwardly between the flange 60 and angle bar H, being provided with a hole for-slidably receiving the inward end of bolt 55. The lower 'face of wedge block 52 is preferably provided with a dovetailed groove engaging with a dovetail tongue 63 formed on the upper face of the of springing angle leg 32 so as to accurately guide the sliding movement of said block 52. a

In view of the fact that the motors high above the resilient bases, the tops of these motors tend to vibrate or move laterally of each l2 extend other when in operation. It is desirable, therefore, that when the motors are arranged in pairs,

cross bars 65 be used to connect the tops thereof.

Brackets 6B of suitable shape may be secured by bolts 61 to the exhaust manifold of the motors,

and sleeves 68 are formed on said brackets for receiving the outer ends of the rods 55. A collar 65 and a nut H1 on each end of the rod 65, rigidly position the sleeves 68 on the rod 65. The rod 65 is preferably bent at an obtuse angle to form an arcuate section H which serves the purpose of giving additional head room between the motors l2 and also to permit a limited amount or movement possible between the motors, thus improving the vibration characteristicsof the'entire system. "One or more, such as three as shown, of theser'ods'65 may beused if desired. Other forms of adjacent mechanical units than motors may also be connected 'advanj tageously with this type connector. v 7

It will be seen that the spring clipsare of fiat metal and areof such character as tohave little or no resilience in the plane of the metal,

but owing to the integral loops 35, the saddle members 34 may move slightly in the plane of.

the clip ends 36 in one direction only and also transversely of said-plane. Thus', when the pro-- 7 I3 is vibrated axially'under the propeller l4, this axial vibration peller shaft thrust of the is transmitted to the motor shaft 24'.which. is]

provided with a thrust bearing inside of. the motor. This propeller vibration, therefore, vi-

bratesthe motor 'axially'of the propeller shaft is, and this vibration is permitted due to the arrangement of the spring clips. These spring clips also permit the'up and down vibration of the motor as it operates. Obviously, there are features of the invention which will find ready applicability in other resilient mountingsthan for boat engines specifically I would state in conclusion that while the -lllustrated examples constitute a practical embodiment'of my invention, I donot wish to limit myself precisely to these details, since manifestly, the same may be considerably varied without departing from the spirit ofthe invention as defined intheappendedclaims.

Having thus described my invention, -I claim as new and desire to secure by Letters Patentzf 1;"In a boat construction, a pair of supporting members extending longitudinally of saidboat motor, base bars in spaced, parallel relationj'to said members, spring clips having'central saddle members and outstanding ends, said clipsbeing arranged in alternate manner so as to-yieldingly connect said bars to said members, and amotor supported by said bars. 1 1

2. In a boat construction,;an elongated sup:

porting member rigidly. connected to the frame the vibration ofv said spring clips due to the operation of the boat motor.

31111 a. boatconstru'ctioma propeller shaft, a motor, for rotating saidpropeller shaft, a flexible coupling on said propeller shaft arranged to yieldingly connect said propeller shaft to'the shaft of said motor so that said propeller and motor shafts may have slight circumferential relative movement, saidflexible coupling being arranged to rigidly transmit the thrust of the propeller to the motor shaft, and spring means under said motor arranged to permit slight yielding movements of said motor axially of said propeller shaft under the action of the propeller thrust.

4. In a boat construction, an elongated supporting member rigidly connected to the frame of said boat, a base member in spaced, parallel relation to said support member, spring clips in alternate arrangement and yieldingly connecting said base member to said support member, a motor supported by said base member, auxiliary spring clips associated with said support member and arranged to increase the load on said main spring clips in addition to the weight of the motor, and means for adjusting the tension of said auxiliary clips.

5. In a boat construction, a pair of longitudinally extending angle bars secured to the frame of said boat, a plurality of fiat spring clips arranged along said angle bars, and a motor having a. propeller shaft and yieldingly supported by said spring clips to prevent vibration of said motor being transferred to said boat frame, said clips being connected between said bars and motor edgewise toward the axis of said shaft, so as to permit slight movement of said motor axially of said shaft and vertically, but resist movement of said motor transversally of said shaft.

6. In a boat construction, a propeller shaft, a motor for rotating same, fiat spring clips resiliently supporting said motor so as to prevent the transfer of vibration from said motor to the frame of said boat, said clips being arranged edgewise toward the axis of said shaft to permit yielding movement of said motor axially of said propeller shaft under the, influence of the thrust of the propeller, and so as to resist movement of said motor transversally of said shaft.

7. In a resilient construction for vibration isolation, a pair of relatively rigid members, and yieldable spring means between and connecting said members together and maintaining the same in resilient spaced relation, said spring means comprising a plurality of individual elements each having spaced attachment portions, one of said attachment portions being laterally outstandings relative to the other, said spring elements being attached to said members in alternate arrangement.

8. In a resilient construction for vibration isolation, a pair of relatively rigid members, and yieldable spring means between and connecting said members together and maintaining the same in resilient spaced relation, said spring means comprising a plurality of individual elements each having spaced attachment portions connected by resilient loops, one of said attachment portions being adapted for direct connection to one of said members and the other for indirect connection to the opposite member by means of an intermediate rigid element, said spring means being attached to said members with the direct connection attachment portions in alternate arrangement.

CARL HUSSMAN.

CERTIFICATE OF CORRECTION.

Patent No. 2,046,558. July 7, 1936,

CARL HUSSMAN.

It is hereby certified that error appears in the printed specification of the above numbered patent rquiring correction as follows: Page 1, second column, line 55, strike out the words "or legs 52"; page 2, first column, line 2, after the numeral "55" and before the comma insert or legs 52; page 3, second column, line 17, claim 7, for "outstandings" read outstanding; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office Signed and sealed this 22nd day of September, A. D. 1936.

Henry Van Arsdale (Seal) Acting Commissioner of Patents.

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