US1523190A - Snow plane - Google Patents

Description

E. GERMAIN SNOW PLANE File o 21, 1922 7 Sheets-Sheet l MN mi w K J if O g? 5 Jan. 3, 1925. 1,523,190

E. GERMAIN SNOW PLANE File NOV. 21, 1922 7 Sheets-Sheet 2 gnu order E. GERMAIN SNOW PLANE 7 Sheets-Sheet 3 FiledNO 21, 1922 Jan. 1925- 1,523,190 E. GERMAIN SNOWPLANE File 21, 1922 7 Sheets-Sheet 4 E. GERMAIN SNOWPLANE File NO 21, 1922 7 Sheets-Sheet 6 Jan. 3, 1925.

E. GERMAIN SNOW PLANE Patented Jan. .13, 1925.

iammsr GERMAIN, or seamen-comm, emana snow. PLANE.

Application filed November To all lo/1.0m it may concern:

Be it known that I, ERNEST GERMAIN, a

subject of the King of Great Britain, residing at Samnaur,-Pi*ovince of Quebec, Ga nada, have invented certain new and useful Improvements in Snow Planes; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in I. the art to which it appertains to make and use the same.

' The present invention pertains to a novel snow plane which is designed to travel over snow and frozen lakes and rivers or other such places that are without roads during the winter-Q The plane is adapted to slide from ice to water and from water to ice, will climb steep hills and operate in a fair? ly strong win i The machine is mounted on a pair of parallel forward skis and an intermediate rear ski the latter being used as a rudder on both snow and water. made air tight and are of sufficient buoyancy to support 1 ,5 times the full load of the machine. The plane, while having several properties of the hydroplane, is not designed for water and is not intended to fly in the air, although various features of this invention may be useful if applied to a hydroplane or aeroplane.

- In aeroplane design lateral stability is ob-- tained by ailerons or wing warp, the pres sure of high speed air being used. In a snow plane where the speed is lower than in an aeroplane and the lateral balance is part.- ly maintained by the contact of the skis with a solid surface, it is necessary-to change the incidence of each wing in opposite directions with relation to a common axis in order to relieve some of the weight 7 on the skis when the latter are travelling in acurved path and also to counteract the centrifugal forces acting upon the overhead parts. To this end, the invention includes a construction by means of which the-two wings can be given simultaneous incidence from zero to 12 degrees on the'same side of the axis, and an auxiliary device is provided for giving the wings opposite incidence ranging from 1 to 3 degrees. The simultaneous incidence above referred to is effected by a mechanism operated by a lever, and the opposite incidence is produced by The three skis are 21, 1922. Serial No. 602,491.

means controlled from afoot bar, both the lever and the foot bar. being within the reach of the operator.

The steering ofthe steering of the boat by a rudder. This arran ement is particularly useful in a device of t is character which is adapted for roadless tracts, lakes and rivers where space is vast. At the lower portion of the machine frame is supported a stationary sector hav- 1ng a rearski is received and adapted to travel. Opposite sidesof the front end of the ski are connected by means of a cable to a steermg wheel also within the reach of the o erator. Depending on the power of t e motor, the machine, with the addition of tail members and the elimination of certain features which would obviously be detrimental in aeroplane construction, can be made to fly.

The invention is fully disclosed in the following description and in the accompanying drawings in which:

Figure 1 is a front elevation of the dev1ce;-

Figure 2 is a side elevation; Figure 3 is a perspective skeleton view; Figure 4 is a detail plan view, partly in section, of the sprocket mechanism shown at the rear end of Figure 3;.

Figure 5 is a plan view of the guide plate and assoclated parts;

groove in which the front end of the,

p p n p n the traction principle, and is similar-to they Figureti is a section on the line 6-6 of T Figure 5;

Figure 7 is a detail elevation of the stream lined cable;

Figure 8 is a vertical section through'theigure 9 is a section on the Figure 8;

- Figure 10 is me 8;

Figure 11 is a front elevation of the seat;

Figure 12 is a plan view of the machine;

line 9--9 of a detail plan taken on Figsteering Wheel and rod shown in Figure 3;

Figure 13 is a detail elevation of the nose, showing the shock absorber in section; Figure 14 is a section on the line 14-'14 of Figure 13;

Figure 15 is a section on the h] e 1515 of Figure 13 Figure 16 is a plar en Figure 1f .vith the top removed;

Figure 7;igure 20 is a section on the line 20'-20 of Figure 15;

Figure 21 is a side elevation showing theskeleton of the machine;

Figure 22 is a plan of the skeleton of the machine;

Figure 23 is a detail of the forward portion of the machine in skeleton;

Figure 24 is a side elevation correspondin to Figure 23;

igure 25 is a detail plan view partly in section of the segment, taken on the line 25-25 of Figure 26';

Fi ure 26 is a section on the line 26-26 of Figure 25;

Figure 27 is a front elevation correspondin%to Figure 23;

igure 28 is a detail lan view of the rear end of the machine in s eleton;

Figure 29 is a section on the line 29-29 of Flgure 28;

Fi re 30 is a section on the line 30-30 of Figure 27 5Fi re 31 1s a section on the line 3l-31 of Figure 30; I

Fire 32 is a section onvthe line 32-32 of Flgure 27;

Figure 33 is a detail skeleton plan view of thg center section and wings;

1 of Figure 33;

Fire 35 is a section on the line 35-35 of Flgure 33;

Fi re 36 is a section on the line 36-36 of Figure 33;

Figure 37 is a front View of Figure 34;

and,

Figure 38 is an enlarged section on the line 38-38 of Figure 33.

The device is mountedon a air of for.- wardparallel skis 1 and an mtermediate rear ski 2. Upon each of the forward skis is mounted a pair of aligned bearing members 3 (Figure 17) which are disposed sli htly to the rear of the transverse axis. ese bearings are preferably formed of aluminum and hollowed out as at 4 for lightness. In the top of each bearing is formed ashallow recess 5 communicating with an additional cavity 6 for the reception ofa square piece of soft rubber 7 which acts as a cushioning member. The top of each rubber inset is concaved as at 8 to provide a seat for a twopart bronze bushing 9. Thehollow axle 10 passes through the bushings and serves as the uniting means for the two' forward skis.

Each bearing is equipped with asuitable cap 11 through the sides of which are passed bolts 12', these bolts also extending throughre 34 is an elevation on the line 34-34 thehearings 3 for securi them to the skis. Ringlets. orcollars 13 are razed on the axle at opposite sides of the bearings for retaining the axle against shifting along its longitudinal axis and for holding the skis 'in constant spaced relation.

The. fuselage comprises a pair of'u per andlower frames 14 and 15 respective] which converge to a point at the rearenc A strip 16 is extended across the sides of the lower frame and. supports aking bolt 17 which passes into the rear ski 2 as shown in Figure "2, a'suitable bearing 18 being interposed to afford pivotal connection between the fuselage and the rear ski. Be-

withsockets 23 which receive the legs of upwardly extendingVs 24 on the upper ends of which is mounted a miniature'fuselage" orcenter section 25. This center section is constructed of a plurality oflongrons 26 and suitable spacers 27 (Figure 34) over which a suitable coverin fabric is drawn. To the forward ends of t 1e lower longrons is secured a pair ofengine bearers 27 on which is mounted an air cooledmotor 28. The interior of the center section is designed to contain agasoline tank 29 and oil tank 29', as shown inFi res 33 and 34. Themotor shaft 128 is inclined at an angle of three degrees to the horizontal,. thus giving the line of thrust an upward grade of 3 degrees and thepropeller 129 is fixed at right angles thereto.

Theaxle 10 is formed in two sections the inner contacting ends of which are surrounded by a sleeve member30 (Figures 27 and 32) which is secured to the sections by pins 31- penetrating therethrough. Onthe upper part of the sleeve is formed aneyelet 32 which is engaged on opposite sides by the legs of a.center V 33 whlch are bound by abolt 34. The upper endsof the le' of theV 33 are secured to opposite sides 0 the center section,- thus providing additional su porting means for the latter, as shown InFi re 1.

e forward portion of the fuselage is completed by a pair of front posts 35 (Figure 21) which join the forward ends of the upper and lower frames.- The lower ends 'of these posts carryaluminum brackets 36 which receive theaxle 10 whereby the front end is supported'. Anose portion 37 extends outwardly from the forward forate ends of the frames and consists of twoangular members 38 composed of square tubing. The vertices of these members are reinforced by angle plates 38., '39- through which is passed afastening bolt 40. o I

A win supporting axle 41 p transversely t roug the ody of the center'section, being supported in bearings 42 formed in a pair of opposite spacers, 27, as shown in Figures 34' and 35; The wings are of a semi-cantilever construction consisting of rigid panels each made of five paral el spars43 of spruce of an 111 thick which are traversed by spaced ribs parallel thereto. The ribs are inlaid into the spars as in'Fi re 38, and the vertical spaces thusforme are filled withwebs 45 forming an I-beam cross section. Themaster ribs 46 are engaged byparallel web members 45 at opposite edges whereby a box like construction is formed.- The spars are pierced for the pnassa of the internal bracm wires 47, w 'le t e webs are peras at 48 for lighteni The central spar is about 6. inches inwldth and the .remainmg' spars are of decreasing widths whereby a stream line cross section is de? veloped, as shown in Figure36. The panels are built on special forms and are covered with aero cloth after being fastened together. Theaxle 41 carries clips 49 in line with the intermediate master ribs for receiving the upper ends ofwing supporting tubes 50, the lower ends of these tubes being received in sockets 51 (Figures 30, 31) clamped to thewebs 20 by thesame bolts 52 that hold the above mentionedsockets 21. The clamps are joined to the forward ends of theengine bearers bycables 53 for relieving drag stresses. Steel envelopes 54 are passed around the intermediate master ribs at opposite sides of theclips 49 and serve to receive the outer ends of thecontrol cables 55,-the operating mechanism for which is described below.

The sides of thelower frame 15 are joined bycross bars 56 and 57 at the front and rear ends respectively, as shown in Figure 3. These bars supportthe ends of spaced guide strips 58 between which is received aslidable control beard 59. A rack 60 is formed intermediate the ends of the control board and is engaged by a pinion 61 mounted on a shaft 62supported inbearings 63 on the sides of the lower frame.-

On one of the bearings is formed a twelvetoothed quadrant 64, while adj acent thereto is an operating or controllever 65 keyed to theshaft 62 and carrying a adapted to engage the teeth of the quadrant. Anintermediate cross bar 67 extends across the lower frame and beneath the guide strips. A perforated plate 68'is securedto the guide strips by means of U-bolts 69 passing theret rough and under the bar 67.; The forward end of the control boardextends through and beyond the :forward bar 56 where it is rovided with amountin 70 on which is pivoted adouble s'ectiona 5segment 71 which is cast of aluminum. posed'bearing strips 72 areplaced at posite sides of this-member each being supported by an end of theboard 56 and one ofthe posts 35 for receivi thepulleys 73. The back of eac of theU plates 19 Figures 30 and 31) has secured thereto a' pair ofbrackets 74 by which are supported additional ca les 55 extending from the wings pass over thepulleys 75 and 73, intersecting at the sides of themember 71 and secured to o posite ends'of said sides, as in Figure 25. T e control board carries anadditionalmounting 76 on which is pivoted a foot.bar 77 provided at its ends with'foot straps (not shown). Through the o posite sides of themember 71 are passed clevises .78 which are connected to the ends of the foot Op- Opguide 7 pulleys 75. The

of the control board 'is mounted a pair of legs 8O which support the operators seat -81. When thecontrol lever 65 is pulled rearwardly, the control board is moved forwardly carrying the element .71 with it, and the o erators seat is guided byparallel rails 81 Figures 21, 22) fixedto the frame of the fuselage. Consequently the foremost of the cables 7 5: are slackened, while the remaining two cables are tightened, thus causing an equal upward tilting of both wlngs. Obviously a reverse movement of the leverwill result in opposite movement of the wings. This device is employed for imparting equal and simultaneous change to both win At the rear end of the control board is disposed still another block 82 (Figures 21, 22) on which is: rotatably supported asprocket wheel 83, aportion 84 of which (Figure 4) is blank. In the base-of therear leg 80 is mounted abushing 85 through which apin 86 isadapted to slide, this pin being normally urged outwardly by aspring 87 in the bushing. The pin is adapted to engage in anotch 88 formed in'the blankvportion 84 for the purpose of holding the sprocket against unintentional or undesired rotation. The sprocket is engaged by' a pushed inwardly, the corresponding side of a thesectoral member 71 advances, while the other side moves rearwardlyv about the pivot point. Accordingly theforward cable 55 connected to one of the wings is tightened and the other forward cable is slackened, the remaining cables also taking opposite movements. This results in one of the wings being turned upwardly, while the otheris tilted downwardly, as dietin ished from the action previously descri d resulting from the operation of thelever 65.

"The incidence obtained from the lever 55 'varies. from zero to 12 degrees and the quadrant tie-contains twelve teet one for each degree. The wings. can be tilted 3 degrees on each side of-thecentral tube 41 by meansof the foot bar. For a "left turn of the snow. plane, the pivot baris operated in the direction of the turn, which action increases the incidence. of the right wing and reduces the left b a similar amount. If the planeis travelling over hard snow. and if thelever 65 is maintained'in -the second notch, giving the wings an equal incidence of 2 degrees, the right hand wing will rise 3 degrees, increasing the angle thereof to 5 degrees, while the. left hand wing falls 3 degrees and 'attains an incidence of 1 degree negative.

The steering mechanism for the rear ski comprises asector 91 fixed beneath the body, being preferably secured to thelower frame 15, as shown in Figure 21. The sector is covered with astream line sheeting 92 for decreasing air resistance.- The forward end of the rear ski is fitted with a reinforcing member 93 which terminates in alip 94 beneath which is secured an angle iron 95. The rear edge of the sector is notched or stepped, as at .96 (Figure 29), the base of the step being provided with acover plate 97. Thelip 94 is received in the notch and is adapted to slide therein substantially throughout the'length of the sector. At the 7 ends of the sector are providedlinks 98 for asteering rod 104 surrounded by a steering ost is sli able but not rotatable with reation to the rod so that thewheel 106 may I be ad'usted longitudinally of-the frame in acco ance with the movement of the seat '81. To the inner end of the steering rod is fixed adrum 109 around which is wound acable 110, this cable passing over thepulleys 99 and 100 and also over additional 4 guide pulleys 111 and 112 glournalled at oppositesides of thestandar 103. The ends of the cable are secured to eyes 93 formed at opposite sides of the member 93 at the forward end of the rear ski. Obviously upon rotation of thewheel 106 in either direction, one side .of thecable 110 is pulled shoc upwardly over the pulleys whereby the forward end of the rear ski is causedito travel formed and have their inner ends attached to a rectangular plate 115 (Figure 16). This plate is disposed within the fuselage, as shown in Figure 24, and works back and forth when the skis are violently struck.

This plate is cushioned upon a thick-piece ofrubber 116 laid across the lower sides of the anles 37. Beneath the lower legs of the ang es is laid an underplate 117 of metal similar to theplate 115 and rounded pieces ofhard wood 118 are secured to each of the last mentioned 1plates, thelower iece 118 and the under p by means ofbolts 119, as shown in Figure 15. The entire mass is 'held to ether by means ofarc 120 wound spirfily therearound to al ow separation between the angles and therubber piece 116, Aflexible memberv 121 is anchored beneath theplate 115 and passes therethrou h to thepiston rod 123 of apiston 122, slifably mounted in anair cylinder 124 fixed tothe upper legs of the an les. The back of the piston is joined to t e base of the cylinder by means of aspring 125 which facilitates rearward or upper movement of the piston 11 n corresponding yieldin of therubber piece 116. In the front wall 0 the cylinder is provided a check valve 126 and a restricted air outlet- 127. When the device 115-120 expands, thepiston 122 is drawn rearwardly ate being fixed tot e angles,

and the space ,atthe forward side is readily filled by air passing throu h the inwardly openin check valve 126 and the air passa e 127. en the movement is reversed, the return of the piston is retarded because of the check valve being closed and the passage 127 being of restricted size. Accordingl the piston and cylinder act as a absorber. I w

The skis are each built of six longitudinal rock elm members 130 (Figure 27) which are reinforced byblocks 131 in the vicinity of the bearingmembers 3. These members are connected horizontally and vertically by means of mahogany braces 132. At inter-.

vals, perforatedrectangular plates 133 are fixed within the 10 'tudinal members to provide additional racing means. The outside is preferably formed of two ply cross grain covering of cedar from the center of the sides and around the top and cedar and beech from. the center of the sides and around the bottom. The lining 134 under the convex of the ski-is removable, being held in place by screws (not shown).

A preferred embodiment of the invention has the following dimensions: Span, 18' 4"; wing ratio, 4; length overall, 18

,6" height, 6' '2"; front skis, 9 long by 14" wide; maximum height, 14"; 9 long by l0 wide;height 12".

A machine constructed according to these dimensions has a weight of about 600 pounds, and the center of resistance lies close to the ground due to the friction of the skis. The center of lift is directly over the points of attachment of the front. skis, and the center of gravity is approximately 2' behind the center of lift, thus enabling the machine to rise over the snow and to counteract the difference between the forces of thrust and resistance. The center of buoyancy is 1 ahead of the center of lift. The propeller is 6 6" in direar skl,

ameter by 4' 6 pitch and its tips clear theground b 28" in order to avoid snow dri ts.

Having thus fully described the invention, what I claim as new and desire to protect by Letters Patent is 1. A plane comprising a forward pair of parallel skis, an axle extending thereacross and journalled therein, a rear ski intermediate said forward skis, a fuselage hingedly connected to said axle and pivotally connected to the rear ski, a pair of Vs extending upwardly from the ends of the axle, and a center section supported by said Vs.

2. A plane comprising a forward pair of parallel skis, an axle extending thereacross and journalled therein, a rear ski intermediate. said forward skis, a fuselage hingedly connected to said axle and pivotally connected to the rear ski, a pair of Vs extending upwardly from the ends of the axle, a center section supported by said Vs, and a motor and prop eller disposed in advance of said center section.

3. A plane comprising a forward pair of parallel skis, an axle extending thereacross and journalled therein, a rear ski intermediate said forward skis, a fuselage hingedly connected to said axle and pivotally connected to the rear ski, a pair of Vs extending upwardly from the ends of the axle, a center section supported by said Vs, a wing axle extending transversely through said center section, wings supported on said axle at opposite sides of the section, and means for tilting said wings.

4. A plane comprising a forward pair of parallel skis, an axle extending thereacross and journalled therein, a rear ski intermediate said forward skis, a fuselage hingedly connected to said axle and pivotally. connected to the rear ski, a pair of Vs extending upwardly from the ends of the axle, a center section supported by said Vs, a wing axle extending transversely throu h said center section, wings supported on said striking axle at opposite sides of the section, means for tilting said wings, and a motor and propeller mounted in advance .of said center section.

5. A plane comprising a pair of parallel forward skis and an intermediate rear ski, a body supported on the front skis and pivoted to the rear ski, a sector carried by the body and adapted to guide the forward edge of the rear ski, and means for turning said rear ski on its pivot.

6. A plane comprising a frame and a pair of wings supported thereby, a pair of guide strips extending longitudinally of said frame, a control board slidably mounted between said strips, a block pivoted to said control board, and a pair of cables extending from each end of said block to one of said wings.

7. A plane comprising a frame and a pair of wings supported thereby a pair of guide strips extending longitu inally of said frame, a control board slidably mounted between said strips, a block secured to said control board, a pair of cables extending from each end of said block to one of said wings, a rack formed in the upper face of said control board, a shaft extending transversely of the frame and carrying a pinion meshing with said rack, and means for rotating said shaft.

.8. A plane comprising a frame and a pair of wings supported thereby, a pair of guide strips extending longitudinally of said frame, a control board slidably mounted between said strips, a block secured to said control board, a pair of cables extending from each end of said block to one of said wings, a rack formed in the upper face of said control board, a shaft extending transversely of theframe and carryin a pinion meshing with said rack, a toot ed quadrant disposed at one end of the shaft, and a control lever keyed to the shaft and adapted for selective engagement with said quadrant.

9. A plane comprising a frame and apair of wlngs supported thereby, a pair of guide strips extending longitudinally of said frame, a control board slidably mounted between said strips, to said control board, a nair of cables extending from each end of said block to one of said wings, a rack formed in the upper face of said control board, a shaft extending transversely of the frame and carrying a pinion meshing with said rack, a toothed quadrant disposed at one end of the shaft, a control lever keyed to the shaft and adapted for selective engagement with said quadrant, and an o erators seat mounted on the control boar in proximity to said lever.

10. A plane comprising a frame and wings supported thereby at opposite sides a block secured thereof, a block pivotally and slidably mounted in the frame, and a pair of cables extending from each; end of the block to one of the wings. A

11. A plane comprising a frame and wings disposed at opposite sidesthereof, a pair of guide strips extending longitudinally of said frame, a control board slidable between said strips, a block pivoted to said strips, a pair of cables extending from each end of said block to one of the wings, and means for sliding said board.

a 12. A plane comprising a frame and wings disposed at opposite sides thereof, av

pair of guide strips extending lon itudinally of said frame, a control board s idable between said strips, a block pivoted to said strips, a pair of cables extending from each end of said block to one of the wings,-means for sliding said board, a foot bar pivoted to the board, and cords connecting opposite ends of said bar to opposite ends of the block. a

13. A plane comprising a frame and wings disposed at opposite sides thereof, a pair of guide strips extending lon 'tudinally of said frame, a control board s idable between said strips, a block pivoted to said strips, a pair of cables extending from each end of said block to one of' the wings, a rack formed in the upper face" of said board, a shaft extending 'trans versely of the frame and carrying a pinion adapted to mesh with the .rack, means for turning the shaft, a foot bar pivoted to the board, and cords connecting opposite ends of the bar to opposite ends of the block. 15. A plane comprising a frame and wings disposedat opposite sides'thereof, a

-pair of guide strips extending lon 'tudinally of said frame, a control board s idable between said strips, a block ivoted to said strips, a pair of cables exten 'nfi from each end of said block to one, of t e wings, a rack formed in the upper face of the board, a shaft extending transversely of the frame and carrying a pinion ada ted to. mesh with the rack, a toothed qu rant at one end of the shaft, a lever keyed to the shaft and adapted for selective engagement with the quadrant, an operators seat mounted on the board In proximity to said drum, said cable being pulleys and having its ends connected to opposite, sides of the rear ski.

.ski pivoted to the bottom thereof, a sector lever, a foot bar pivoted to the board in proximity to the seat, andcords connect ing opposite ends of said bar to opposite ends of the block. v

.16. A planecom ris ng a frame, a rear skipivoted to the, ottom thereof 'a sector" supported by the frame and law a groove formed along its arc of less ra us, a, lip formed on the forward end of the rear ski and received in said groove, and means for moving said lip along the groove.

17. A plane comprising a frame, a rear ski pivoted to the ottom thereof, a sector supported by the. frame and havm a gooove formed along its arc of less radius, a lip formed on the forward end of the 3 rear ski and received in said groove, a standard mounted on the frame, a steerin rod journalled in the standard, a drum fix to the rod, and a cable havin its intermediate portion wound aroun the drumand its ends secured to opposite sides of the rear ski. I

18. A plane compzising a frame, a rear ski pivoted to the supported by the frame and havin a groove formed along its arc of less ra 1us, a lip formed on the forward end of the rear ski and received in saidgroove, a standard supported on the frame, a steering rod journalled in the standard, a. drum secured to the rod, pulleys carried by the standard and by theends of the sector, and a cable having its intermediate portion wound around the 19. A plane com rising a frame, -a rear fski pivoted to the ottom thereof, a sector supported by the frame and having a groove formed along its are of less radius, a lip formed on the forward end of the rear ski and received in said groove, means for moving said lip along the groove, a pair of wings supported by the frame,fa block slidablv mounted on the frame, and a pair of cables extending from each end of said block to oneof said wings.

20. .A plane comprising a frame, a rear sln' pivoted to the bottom thereof, a sector supported by the frame and having a re us,

groove formed along its arc of less a lip formed on the forward end of the rear ski and received in said groove, means for moving said lip along the groove, a. no

pair of wings supported by the frame, a block pivotally mounted on the frame, and a pair of cables extending from each end of said block to one of said wings. I

21. A plane comprising a frame, a rear supported by the frame and having agrogve formed along its arc of less radius, a 11p formed on the forward end 'of the rear ski and received in said groove, means ttom thereof, a sector passed over said 5 each end of said block to one of said wings.

22. A plane comprising a frame, a rear ski pivoted to the bottom thereof, a sector supported by the frame and havin a groove formed along its arc of less ra ius,

m a lip formed on the forward end of the rear ski and received in said groove, means for movlng said lip along the groove, a

pair of wings supported by the frame, a pair of guide rails extending longitudinally of the frame, a control board slidable between the guide rails, a block pivoted to said board, a pair of cables extending from each end of the block to one of the wings, means for shifting said board, and a seat mounted upon the board.

In witness whereof I have hereunto set my hand...-

ERNEST GERMAIN.

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