US1625043A

US1625043A - Interstal-cor

Info

Publication number: US1625043A
Authority: US
Publication date: 1927-04-19
Anticipated expiration: 1944-04-19

Description

April 19' 1927- H. E. MccRAY nrsnuancounsnou imams original med Fenu. 1 923 2 sheets-sneer 1 April 19,1927.

. Y 1,625,043 H. Y E, Mock/w rulmiu. cousus'r'rou Buelna v Original Filed Feb. 15. 192

2 Sheets-Sheet 2 Patented Apr. 19, 1927.

UNITED STATES HAROLD E. MCCRAY, 0F WATERLOO, IOWA,

ASSIGNOR T0 JOHN DEER-E TRACTOR COM- PANY, OF XVATERLOO, IOWA, A CORPORATION OFv IOWA INTERNAL-COI'BUSTION ENGNE` Original application filed February 15, 1923, Serial No. 619,081. Divided and this application led April My invention relates to internal combustion engines of the horizontal type such as are commonly used for operating farm machinery. In such engines it is desirable that the electric current required for ignition purposes be supplied by a magneto. The magneto must` of course, be driven by the engine, and my present invention has to do particularly with the arrangement of the magneto and the mechanism for driving the saine. lt has for its object to provide for mounting the magneto so that it will be easily accessible, and for positively driving it from the clank shaft of the engine in such manner that proper lubrication of such driving mechanism will always be assured, while the lubricant will be kept out of the magneto itself; also to provide a construction by which access may be had to the interior of the crank case without disturbing the magneto setting. I accomplish this object as illustrated in the accompanyingr drawings and as hereinafter described. What I regard as new is set forth in the claims.

In the drawings,-

Fig. 1 is a side elevation of my improved engine showing the magneto mounted. on the crank case thereof, and illustrating in dotted lines the driving train for the magneto;

Fig. 2 is a partial central longitudinal vertical section of the engine showing the interior of the crank Case and the driving train for the magneto located therein;

Fig. 3 is a partial vertical cross-sectional view showing the manner in which the'magneto is mounted on the crank case, and some of the driving connections thereof; and

Fig. 4 is a artial vertical cross-section on line 4--4 of ig. 1.'

Referring to the drawings, 5 indicates the base of'my improved engine, which, in the illustrated consruction, is in the form of a hollow casting adapted to be bolted or otherwise suitably secured to a supporting plate 6, of wood or other suitable material, and to contain within it a fuel tank 7.I which, as best shown in Fig. 3 occupies the greater portion of the base 5. At its upper margins the fuel tank is provided with an outwardlyextending fla-nge 8 which overlies an inwardly-projecting flange '9 at the upper margin of the base. A cover plate 10 fits Serial No. 26,152.

over the fuel tank 7, its marginal portions resting on the flanges 8, as shown in Figs. 2, and upon the margins of this cover plate rest the marginal portions of a crank case 11. hase 5 by bolts 12, as shown in Fig. 1. By this construction the cover plate 10 serves as the top of the fuel tank and also as the bottom of the crank case. For the purpose of filling the fuel tank, thecrank case 11 s provided with a passage 13, which is formed in a boss 14 projecting from the lower portion of the crank case, and such passage is adapted to be closed by a plug 14 or other suitable means. rlhe passage 13 leads to a filling opening 15 in the cover plate 10. A gasket 16 is placed between the crank case and cover plate 10 and around the opening 15 to prevent oil from leaking out of the crank case and into the fuel tank. For delivering the fuel from the fuel tank I provide a pipe 17, which is connected with the inner end o f said tank near the bottom thereof, and provided at its outer vend with aplug' 18 by the removal of which the tank may be drained. Leading from the pipe 17 is acheck valve 19, preferably of the ball type, made in the form of an elbow casting, and connected to said check valve by means of a coupling 20 is a supply pipe 21 leading to the fuel inlet of the engme cylinder. The pipe 17 and check valve 19 are both located lWithin the baseV 5as shown in Fig. 2, and byythis construction the check valve is protected and is not apt to be damaged in' transporting the engine, as when the pipe 21 is uncoupled none of the parts connected with the fuel tank project beyond the base. It should be understood that the construction of the basefand the arran ement of the fuel tank, as shown and d scribed are not included in the subjectmatter to which this application is particularly directed, but constitute that of a separate application tiled of even date herewith.

The crank case constitutes also the main engine frame, since cast integral with it is' a combined cylinder block 22 and water hopper 23, as shown in Figs. l and 2. The engine cylinder 24 extends horizontally through the lower portion of the water hopper 23, but is separted therefrom laterally so that the water in the hopper' surrounds said cylinder. An opening is provided 1n The crank case is securely bolted to the the bottom of the cylinder block 22 through which the water in the hopper may be dra-wn off, which opening is closed b v a plug 25.

The crank case portion of the engine frame is provided with a removable cover 26, the outer end portion of which is secured thereto by bolts 27 at opposite sides of the cover, while its inner end portion is held in place by an intermediate bolt 28 which extends diagonally through a boss 29 in the cover plate 26 into a b oss 3() in that port-ion of thc engine frame which forms the inner wall of the water hopper 23, asshown in Fig. 2. The cover is made oil tight by providing suitable gaskets between the margins of said cover and 'the surface of the crank case against which they bear. Access may readily be-had to the various part within the crank case by removing the cover plate 26. since when the cover is removed the interior of the crank case is completely exposed.

A crank shaft 31 having a crank vportion 32 extends'transveisely of the crank case, and the end portions of said crank shaft are mnntedin suitable upper and lower bearings 'carried by the side walls of the crank case, the llower bearings being indicated by 33 and the upper bearings by 34, (see Fig.; 1).v As shown in said figure, the side walls of the-crank case adjacent to' these bearings arecut away, and the lower bearings 33 are formed in depressed portions or recesses in -said side walls.l The upper bear- Vings 34' are formed in removable blocks whiclrfit into said recesses and are held in place by boltsl 36. The bearings 33, 34 are provided-with the us'uaLanti-fri'ction 1inings, 37, as shown in Fig. 1. The crank shaft may readily be removed as occasion may require by removing the -c'ovcr 26 and the blacks 35.

Referring now to Fig. '38 indicates the piston of the engine` which operates in the cyli nder-24, said piston being connected by. a pitman 39 with the crank port-ion 32 of the cranlc shaft, which is preferably provided with two tly wheels 40, one at each 4side Yof the engine. One of said fly wheels is shown in Fig.- 1.

Electriccurrent for ignition purposes is furmshed by a magneto 41 which is mounted on the crank ca se at one side thereof between the crank shaftandthe water hopperZ as best shown in Fig. 1, and below the position of the magneto is a chamber 42,

best shown in Fig. 4, having a laterally disposed cover plate43. which chamber contains certain controlling mechanism that need not bei described as' it has nothing to d withthe subject-matter of this application. The cover'pl'ate 43 is removable so that access may. behad` to the parts contained in said chamber. and it is held in place by screws 44, as shown in Fig. 1.

'lhe magneto 41 is driven from the crank shaft 31 by means of a. train of gea-rs located inside the crank case and subject to lubrication by the splash system', as hereinafter described, said train of gears coinprisin r a pinion 45 mounted on the armature shaft 4G of the magneto and having a collar 47, preferably integral therewith, that projects through a substantially vertical slot 26*l in the crank case cover extending up from the lower edge thereof. as shown in Fig. 3; a gear 4S mounted on a transverse shaft 49 journaled in the side wall 11 of the crank case, as shown in Fig. 4; and a pinion 5() mounted on the crank shaft 31, as shown in Fig. 2. The cellar 47 serves to keep oil out of the magneto, and the slot 26 in the cover 26 permits the cover to be removed without disturbing the magneto setting. To make a tight closure at this point the cover is provided with a separately removable plate 26" and a gasket 26. that are secured to the outer face 'of the cover by one or more screws 26, and fit closely around the collar 47, as shown in Fig. 3. lVhen the cover is to be removed said plate and gasket arc first disconnected from it by withdrawing tbe screw or scr'ews 26".

The lower portion of the crank case serves as an oil reservoir. oil being supplied thereto through an inlet 51, best shown -in Fig. 1 and indicated by dotted lines in Fi'g. 2, said inlet preferably being in the fo'rm of a cylindrical boss projecting from the lowe'r portion of the crank case at one side thereof, about midway of the length thereof, and normally the 'inlet is closed' by a plug'-52. Through this inlet the level of the' oil inay be observed. and it is locate'd substantially at thc center. of-the engine with respect to the fore and aft dimensions thereof, so that it will provide :rsafe gauge for` ascertaining the level of the oil in the'crank case, regardless'of whether or not the 'engine has been set slightly o'ut of level. Located within the crank case and secured to'the bottom thereof is a pan 53, shown in Figs. 2 and 4. which has a hole or' perforation 54 in it a sho'rt distance above the bo'tt'or'n tler'eof for admitting oil from the c'rank case to said pan, and at that 'side of said-pan adjacent to the cylinder 24' it is pro`vi'ded with an upwardly-projecting curved deeci tor' 55, the purpose of which will be hereinaftc'r explained.. Arranged over and dipping into the pan 53 is a centrifugal governor 56 mounted on a transverse shaft 57 journaled in the side wall 11a of the-crank case. as show'nin Fig. 4. Said-governor comprises weighted levers 5S pifvoted at 59 to dix-'erging arms 60 which project from the in ner end of the shaft 57, the leversv 58 being provided with inwardlyprojecting arms (i1 wiich project toward the axis o't-th'e shaft 57. As the governor rotates the weighted portions of the levers 58 tend to swing out, or away from the shaft 54, while the outer ends of the arms 6l tend to move inwardly in substantial alinement with the axis of said shaft. This inward movemeinL of the arms 61 is resisted by a spring 6'?. mounted on a rod 63 that extends axially through the shaft 57 and is provided with a head 64 at its inner end which underlies the. inner ends of the arms 61. as shown in F ig. 4. 'lhe spring 62 is fitted in'a recess in the inner end portion of the shaft 57, and the inner end of. said spring bears against an abutment formed at the inner end of said recess. By this construction the spring ('12 tends to hold the governor in its normal position, but yields to permit the governor levers to swing out under centrifugal action. The governor is driven from the crank shaft of the engine througlrthe pinion and gear 48. the latter of which connects with a pinion 65. mounted on the shaft 57. The same gears that drive the magneto also drive the governor 56, and this construction, therefore, obviates the necessity of having two sets of gears for driving the two mechanisms. The governor isv so arranged with reference to the pan 53 that when it is rotatedby the operation of the. engine and the weighted levers 58 aretherel'iycaused to swing outwardly, or away from the shaft 57, they 'then dip into the oil in said pan, andconsequently act to distribute it throughout the crank case. lthereby lubricating the parts therein. The gears by which the armature of the magneto is rotated, as well as the amature shaft are therefor constantly lubricated, when the engine is in operation, but the oil is kept from passing into the magneto itself by the collar 47. rlhe plate 26 and the gasket 26 prevent the oil from passing out over the collar 47. Furthermore, when the cover is removed the driving gears of the magneto are completely exposed so that access may easily be had to them.

Oil is supplied to the pan 5?, from the crank case by the hole 54. which arrangement provides a simple and accurate means for controlling the amount of oil thrown by the governor. which is limited to the amount that will pass throughl the hole 54. The pan serves to keep out sediment which may accumulate iu the bottom of the crank case` and the sides of the pan also serve as deectors to direct the oil .throughout the interior of the crank case. The defiector 55 above referred to is provided to prevent an excessive amount of oil from being thrown against the piston and into the cylinder. and I also prefer to provide an additional shield 66 in the form of a plate which extends transversely of the crank case adjacent to the inner end of the cylinder 24 and between it and the pan 53, as shown in Fig. 2. Said shield is secured at its upper margin to a Range (3T projecting downwardly from the cover plate 26, and is provided with a vertical slot wide enough for the passage of thc pitman 31). The particular means shown and descrihrd for distributing: the l l icant is riot herein ihziznrd as it is include-5. in the subject-inattivi' of a separate application for patent. filed of even date herewith. and it should be understood that so far as my present invention is concerned, any suitable means may be provided for appiying the oil to the parts to be lubricated.

1What I claim as in v invention and desire to secure by Letters Patent, is-

l. In an internal combustion engine, the combination of a crank case, a removable cover therefor having a slot therein extending from one edge of said cover, a crank shaft disposed transversely of said crank case, a. magneto exteriorly mounted on the crank ease, and having its armature shaft. extending through said slot gearing arranged inside the crank case for driving the armature shaft of said magneto, oil distribating means inside the crank case for lubrieating said gearing, and means for preventing egress of oil through said slot-.

2. n an internal combustion engine, the combination of a crank case. a'reniovable cover therefor, a crank shaft disposed trans*- versely of said crank case, a magneto mounted exteriorly on said crank case and having an armature shaft extending through said cover into the crank case, said cover being removable independently of said armature shaft, a pinion carried by said armature shaft, a colla-r around the armature shaft and extending through said cover, and means for driving said pinion from said crank shaft.

3. In an internal combustion engine, the combination of acrank ease, a removable cover therefor, a crank shaft disposed transversely of said crank case, a magneto mounted exteriorly on said crank case and having an armature shaft extending through a slot in said cover into the crank case, said slot extending from one of the edges of said cover, a pinion carried by said armature shaft, a collar integral with said pinion and extending around the armature shaft through said slot, and means for driving said pinion from said crank shaft,

4. In an internal combustion engine, the eon'iljiination of a crank ease, a removable cover therefor, a crank shaft disposed transversely in said crank case, a magneto mounted exteriorly on said crank case at one side thereof and having an armature shaft extending through a slot in said cover, a pinion carried by said armature shaft and having a collar extending through said slot, a detachable plate carried by the cover outside of said slot and fitting around said colllO lar, and means for driving said pinion from said crank shaft. 5. In an internal combustion engine, the combination of a crank case, a removable cover therefor. a crank shaft disposed transreisely in .said crank ease, a. magneto mounted cxteriorly ou said crank case at one side thereof and having an armature shaft. extending through a slot in said cover, a pmion carried by said armature shaft and haring a collar extending through said slot, a detachable plate car ied by the collar outside of said slot. a gasket between the plate and the. cover fittingr around said collar, and means for driving said pinion from said crank shaft.

6. In an internal combustion engine, the

combination of a crank case comprising twoV separable sections, a crank shaft in said crank case, a magneto, a shaft extending through said crank ease and driven at its inner end from said crank shaft and operatively connected at its outer end to said magneto, said shaft passing through a slot in one of said crank case sections, which slot extends to one `of the edges of said latter section whereby said section can be removed without interrupting the driving relation to said magneto,'and means for protecting the magneto against the discharge of lubricant through said slot.

7. In an internal combustion engine, the combination of a crank case comprising two separable sections, a magneto mounted exteriorly of said crank case, a driving member passing through said crank case and adapted to be driven at its inner end from within said crank case and adapted to impart operative motion to said magneto, said driving.,r member passing through a slot in one of said crank case sections, which slot extends to one of the edges of said latter section whereby said section can be removed without interrupting the driving relation to said magneto` and a detachable closure member for covering said slot against the egress of lubricant,

S. In an internal combustion engine, the combination of a crank case, a removable cover therefor, a crank shaft, journaled in said crank case, a magneto supported exteriorly of said crank case, a rotary member passing through said crank case, means within said crank case for driving said rotary member from said crank shaft, means operatively connecting said rotary member with said magneto, said rotary member being disposed within a slot in said removable cover, said slot extending to the lower edge of said cover and permitting removal of said cover independently of said rotary member, and a closure plate detachably connected to said cover for closing said slot around said rotary member.

HAROLD E. MsCRAY.