USRE16757E

USRE16757E - knight

Info

Publication number: USRE16757E
Authority: US
Priority date: 1922-10-31
Publication date: 1927-10-04
Also published as: US1525550A

Description

Oct. l4,A l1927.`

c. Y. KNIGHT l MECHANISM FOR `FACILITATINCY THE STARTING OAF .INTERNAL COMBUSTION ENGINES' Oct. 4, 192?.

C. Y. KNIGHT MECHANISM FOR FACILITATING THE STARTING OF INTERNAL COMBUSTION ENGINES 3 Sheets-.Sheet 3 Original Filed Oct. 17. 191B .o m g 7 l m mmm Ellll INVENroR. v hfflllc@ Y Knight,

A TTORNEY Reissued Oct. 4, 1927.

UNITED STATES .PATEN Tv OFFICE.

VcHARLIzs Y. KNIGHT, or PASADENA, CALIFORNIA, -AssIGNoR To THE KNIGHT AMERI- CAN PATENTS COMPANY, or CHICAGO, ILLINOIS, A coBroRATIoN OF'DELAWABE.

MECHANISM Fon FACILITATING THE STARTING or INTERNAL-COMBUSTION ENGINES.

original 1110. 1,305,905, dated :une a, 1919, serial No.. 258,527, med umher 17, 191s.

reissue kle'd December B,

The present invention relates to improve- `ments in mechanism for facilitating the starting of internal combustion engines and has for its object the provision of mechanism ofthi'sclass which shallbe of improved construction and operation. p I

, A further object of the invention is to proy l vide an im vroved starting mechanism. for an engine em'odyingy rotatable portions .with means for effecting a. change in the speed of one of said portions to insure the starting of the en ine. y

Al furt erobject of the invention is to provide an engine havin a driving andl a riven portion mounted or rotation in unison` with means for effecting a change in speed of one of said portions and means ac- -t'uated by one of saidportions i'or continuing Vrthe rotation of the other portion inthe l VFigure III is fra direction in which it is first moved. Further objects ofl the invention relate to improvements in detailed forms of construction and in the method of operation which as shown, described and claimed herein constitutes one embodiment ofthe invention, though it will be understood that other embodiments falling within the scope of the appended claims may be evidentto :those skilled in the art to which this invention appertains and that therefore the invention isnot limited tothe specific arrangement shown in the drawings, in which:

, Figure I' is a side elevation of an engine constructed inaccordance with` and embody- 'i`n` 'the objects set fort-h above.v

. ifigure II is a vertical section taken on line II-II of Figure I.

y entary vertical section taken on line III- II of Figure I.

Fi re IV is a vertical section takenv on line V-IV of Figure I.

' Figure V is a fragmentarysectional plan ytaken on line V-Vo- Figure I.'

In many cases the conditions under which internal combustion engines are operated makes it im erative that the weight-of the engine and associated parts shall be reduced to a minimum and under .such conditions it is very desirable to dispense with thev usual starting mechanism. This is especially true in 'aerialnavigat-ion Where the starting 'of the engine is diiilcult unless special provision I Application for 1919. Serial No. 343,371.

is made for this purpose. In the present application I have shown one form` of internal combustion engine in which the engine cylinders and base rotate around' the crank shaft and at different rates of speed and I `have illustrated my invention as applied to'l an engine of this type. 'y

In the drawings designates a frame o'r casing vform-ing' the crank casing of an inter-nal 'combustion engine provided with rad-ially arranged cylinders 11. The frame or casing 10- is provided with a hollow journal 12 supported in a bearing 13 whichv is'carried by a frame member 14 and at the side ofthe casing 10v opposite the" bearing 513 a Second bearing' 15 is supported by a frame 16 which is suitably connected with theframe 14, said bearing 15 having mounted therein a hollow yjournal 17 which extends from the casing 10. Inthis way the casing 10 andtheengine cylinders 11 are mounted.' to rotate -freely within the bearings upon the' frame members 'I4 and 16 of the machine: The crankshaft 18 extends through the hollow journals 12 and 1 7' of the casing 10 and is free to rotate therein.' One end of the ,crank shaft is corrnec'ted with the load to be driven which in the drawings is illustrated as a propeller blade 19 of an aeroplane. The opposite end of.v the crank shaft is provided with a gear 20 normally vloose upon the shaft and rigidly connected with a clutch disc 20 arrangdto ybe caused to rotate with the shaft, preferably by means of a friction' clutch member 21. The clutch member '21 is controlled by a lever v22 connected withy said clutch member suitable links and whichv is held inV its various positions of adjustment by anadju'stable locking member (not shown) I'which is adapted lto engage the teeth of the segment 23 to hold thev leverin various positions of adjustment. n A spring 24 isl provided to force the" clutch member 21 into position to lock the disc 20" and gear 20 upon theshaft 18. The gear 2O meshes with a larger gea-r 25 which is preferably'formed integral with a pinion 26 meshing with an idler pinion'27 Which in turn drives a second large gear'28. The gear 28 is end of which is journaled in a'boss 30 on the frame 16 land the other end in a bearing 31 on an'v arm 32 extending upwardly from ioo rigid upon a. shaft 29, one v the frame 14 as shown in Figures I and IV. The gear 25 and pinion 26 ar-e mounted upon a shaft 33 one'end of which is journaled in a boss 33 on the frame 16 and the other end in a bearing 34 supported by the arm 35 of the frame 14. Mounted upon said arm is also a bearing 36 in which a short shaft 37 Carr ing the pinion 27 is journaled, said pinion eing adapted to drive the gear 28 and pinion 38 on the shaft 29. -A sprocketfchain 39 connects the sprocket 40 on the engine casing 10 with the pinion 38 on the shaft 29, as shown in Figures I and V.

When the engine is under normal operation the crank shaft 18 andvcasing 10 will of course be rotated in different directions and the chain of gearing b-etween the engine casing and -crank shaft determines the relative speed of rotation of the two engine parts upon the frame. It will be seen that the casing 1() will be rotated through the reduction gearing at a comparatively low rate of speed while the shaft 18 and the propeller blade 19 will be driven at a rapid rate of speed in an opposite direction, By this arrangement the advantages of a rotating engine base and cylinders vare secured without the disadvantages resulting from the rapid speed of rotation incident to the type of engine in which the cylinder base rotates at the rate of speed of the driven parts. As shownin Fi ures I and III the end of the crank shaft 18 as rigidly secured thereto a ratchet wheel 42 and a pawl 43 is pivoted on the frame 16 and provided with a hand lever 44 by which it may be moved into and out of engagement with the ratchet wheel. At this point the crank shaft 18 is journaled in a bearing 45 on the rear of the frame 16, as'shown in Figure III.

In starting an engine ofthis type the clutch member 21 is disconnected and the awl 43 is moved out of engagement lwith the ratchet 42. This leaves the engine casing 10 and crank shaft 18 free to be rotated in unison and consequently the entire mass may be rotated as a. freewheel without the shifting of the pistons in their cylinders and consequently without the resistance due to compression in the cylinders. On first starting the engine, as by turning the propeller by hand, the parts will be rotated in a counter-clockwise direction :as viewed Figures II and III that is of course when the pawl 43 has been removed to release position. When the momentum of the moving parts has become suiiiciently great the *operator will move the pawl 43 into engagement with the ratchet 42 and thus stop the rotation of the crank shaft 18, leaving the casing 10 free to continue its rotation in a counter-clockwise direction. Since the cylinders and casing continue to rotate and the shaft 18 is held by the pawl or clutch, as the case may be, it follows that movement III of the pistons in their cylinders will take place exactly the same as if the engine base were held stationary and the engine cranked in the usual manner. As soon as the rotation of the crankshaft is suiciently checked or stopped by means provided for that purpose explosions in the cylinders will begin and the propeller and crank shaft will then rotate in a reverse direction from the cylinders and engine casing. The clutch member 21 may now be thrown in so that the engine base and crank shaft may be made to rotate at a predetermined rate of speed, one with respect` to theother, according to the proportion of the gearing Connecting them, and

when this has been accomplished the engine will be operating in a normal way. When the explosions begin in the engine cylinders the tendency will be to rotate the crank shaftv18 in a clockwise direction as viewed in Figure II` and the heavy parts, including the engine casing and cylinders in a counterclockwise direction. There will be no great strain brought upon the engine since the heavy parts will continue to move in the direction in which they were rst moved. Furthermore there will be no great resistance to the movement of the crank shaft in t-he opposite direction in which the casing is rotated because it rotates freely under the pawl 43 in this direction. i

It will be apparent. that instead of bringing the crank shaft18 to a sudden stop by throwing the pawl 43 into engagement with the ratchet 42, the engine may be started as previously stated by first bringing the

heavy parts

10 and 11 and the crank shaft 18 up to the necessary speed to give them the required momentumV and then throwing the clutch member 21 into engagement with the discA 20 of the gear 20 which will produce relative rotation of the crank shaft and engine cylinders and cause explosions to occur in the cylinders in the same way as if the engine were cranked in the usual manner.

IVhile I have shown and described in considerable detail a structure constituting one embodimentof the invention it will 'be understood that such showing and description is more or less illustrative of a particular embodiment of the invention and I do not limit the invention to the exact structure and arrangement ofparts shown. It will be further understood that the invention as set forth in the claims `comprehends both the broader and more limited manner of carrying out the improvements which I have made and that the claims herein are drawn with the idea in view of protecting all novelty inherent in said invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In combination, a motor having the frame member thereof mounted for rotation frame and, shaft and having a crank shaft arran "d `to'rotate relative to said frame during Yt e operation of said motor, means for supporting said to rotate in unison with one another, and means for stopping the rotation of said shaft to cause relative rotation of shaft connected with said cylinders to be driven thereby, means for supporting said shaft so that it is free to rotate with said engine base and cylinders, and means for checking the rotation of said shaft to cause relative movement between said base and shaft for the purpose of st-arting the operation of said motor.

3. An internal combustion engine having a rotary crank shaft, cylinders arranged to rotate about said crank shaft, means for support-in said shaft and cylinders so that y f they are ree to rotate in unison with one another, means for interruptin the movement of the shaft thereby causing it to rotate relatively with respect to said cylinders for the purpose of starting the operation of said engine and means for causing said shaft to be driven from said cylinders.

4. In an internal combustion engine, a driving mechanism and al driven member, the mass of the driving mechanism being relatively greater than that of the driven member Vand said driven member being arranged to be driven in-a direction opposite that of said driving mechanism, means for supporting said driving mechanism and driven member to move in unison with one another to develop kinetic energy in said y moving parts, and means for causing said parts to move relative to one another under the influence of the energy thus developed for the purpose of starting the operation of said engine, the direction of rotation of saidV driving member being unchanged by said starting operations.

i ber and sha 5. In `an internal combustion engine, a base member having cylinders connected therewith, a crankshaft journaled to rotate in vsaid base member and driven by said engine, bearin s for supporting said base mem- It so that they are free to rotate in unison with one another to develop energy of rot-ation, and means for checking the rotation of said shaft While said engine base continuesto move thus producing relative rotation between said shaft and engine base for the purpose of starting the operation of said engine. h

6. In combination, an engine comprising 'a driving portion and a driven portion adapted for relative rotation during the normal operation of the engine, a starting mech- `shaft adapted for'relative "rotation withfre spect to each otherduring t-he normal operation of the engine, and starting' mechanism therefor inciuding means forpermitting rotation of both the cylinders and crank shaft in unison, and means for subsequently retarding the rotation of the crank shaft to effect the starting of the engine.

8..In combination, a driving mechanism comprising an internal combustion engine mounted for rotation and having a driven cra-nk` shaft mounted to rotate in unison therewith and in a reverse direction with respect thereto, means for effecting a relative rotation of said shaft to effect a starting of the engine, and means actuated by said shaft ,y

or continuing the rotation of the engine in the direction in which itis first moved.

s 9. In combination, an engine, comprising a driving portion and a driven portion, force transmitting connecting mechanism positioned in iiXed relation to said driving portion, said driving portion being arranged to rotate in a non-driving relation with said driven portion, and' means for effecting a change in speed of said driven portion Without changing the direction of rotation of the driving portion and connecting mechanism to permit the starting of said engine.

l0. In combination` a driving mechanism comprising an internal combustion engine mounted for rotation and having a crank shaft mounted to rotate both in unison therewith and relatively thereto in the same or reverse direction, and means for retarding the lrotation of said shaft to effect the starting of the engine before reversing the direction of rotation of said shaft.

11. In combination, an engine comprising two portions capable of rotation in unison and in opposite directions in a driven relation, means for varying the speed of one of said portions without change in the direction of rotation to eHect the starting of the engine, and means for connecting said porportion and tion of the portions to cause the engine to assume its cyclic function.

14. In an internal combustion engine the combination of crank shaft, cylinders arranged to rotate about said crank shaft,A

speed transmission mechanism connected to said cylinders and meansA for connectingand disconnecting Said crank shaft `from said speed transmitting mechanism.

In testimony whereof I aiix my signature.

CHARLES Y, KNIGHT.