US1425057A

US1425057A - Internal-combustion engine

Info

Publication number: US1425057A
Application number: US202795A
Authority: US
Inventors: Rowledge Arthur John
Original assignee: D Napier and Son Ltd
Current assignee: Napier Turbochargers Ltd
Priority date: 1917-11-19
Filing date: 1917-11-19
Publication date: 1922-08-08
Anticipated expiration: 1939-08-08

Description

A. J. ROWLEDGE. INTERNAL COMBUSTION ENGINE.

APPLICATION FILED NOV. 19. 19H.

Patented Aug 8, 11922 3 SI'IEETS-SHEET I F -fi I LIT/ 42k V wmm A. J. ROWLEDGE. INTERNAL COMBUSTION ENGiNE. APPLICATION FILED NOV. 19, 1917.

l gg5 57 Patented Aug. 8, 119221 I i 3 SHEETS-SHEET 2.

A. 1. ROWLEDGE. INTERNAL COMBUSTION ENGINE. APPLICATION FILED NOV; 19, I91?- 3 SHEETSSHEET 3.

1 $52,5 5? Patented Aug. 8 I922;

UNHTE stares Patent ensues.

ARTHUR JOHN ROWLEDGE, 01E LONDON, ENGLAND, ASSIGNOR TOD. NAPIER z SON,

LIMITED, OF LONDON, ENGLAND.

- INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent. Paflggntgqfl A g, $9 1922 Application filed November 19, 1917. ,Serial No. 202,795.

To all whom it may concern:

Be it known that I, ARTHUR JOHN Row- LEDGE, subject of the King of England, residing at London, in England, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification.

This invention relates to internal combustion engines of the type comprising three sets'or blocks of cylinders arranged so that the axes of the cylinders are disposed in three planes relatively inclined about the crank shaft axis and each block of cylinders having one or a pair of cam shafts mounted on the cylinder heads for operating the valves, and has for its object to effect certain improvements in the method of driving these cam shafts off the crank shaft and also of driving one or more magnetos and the necessary water and oil pumps which is embodied in the present ap'p'licants concurrent application for United States Letters Patent Serial No. 196,710 filed October The invention will be fully disclosed in the following description when taken in connection with the accompanying drawings in which:

Figure 1 is an end elevation partly in vertical section on the line 1 -1 in Figure 3 looking in the dlrection of the arrows and illustrates one construction of internal combustion engine of the type indicated having the present improvements applied thereto.

certain parts being omitted for the sakeof clearness.

Like letters indicate like parts throughout the drawings. I

The three sets or blocks of cylinders A, B

and C are arranged so that the axes of these cylinders are disposed in three planes relatively inclined about the axis of the crank shaft D the angle between,the'block of cylinders A and the block ofcylinders B being equal to the angle between the block of cylinders A and the block of cylinders C. On the head 'of each block of cylinders are mounted two cam shafts A A B ]B and C C these cam shafts serving to operate the twin sets of valves with'which each cylinder in each block is provided. These cam shafts are geared together by spur gearing so that they rotate in opposite directions and on the end of one of the cam shafts A B C is a bevel wheel'A B C which gears with a corresponding bevel wheel E E E mounted on what may be termedthe 'outer end of an intermediate shaft. These three intermediate shafts are similarly constructed and each is divided at some point in its length into two parts connected by a detachable coupling which will be more particularly described hereafter. In Figure 1 the detail construction of the central intermediate shaft only is'shown in section the two portions of this shaft being designated G and G. 0f the lateral intermediate shafts H and J only a portion of the end of each shaft appears in Figure l the figure showing in elevation the casings K within which these shafts are enclosed.

All the three intermediate shafts G H and J are disposed truly radial with relation to. the axis of the crank shaft D. On the end ofthe lateral intermediate shaft H is a bevel wheel H and on the end of the intermediate shaft J is a bevel wheel J both these bevel wheels gearing with a bevel wheel D mounted on the crank shaft D or on an extension or prolongation therethe crankshaft is somewhat prolonged or provided with an extension as shown in Figure 3 and carries in addition to the bevel wheel D a second bevel wheel D by means of which two magnetos are driven as shown in Figure 2. These two magnetos L are disposed on opposite sides of the crank shaft D and are driven through bevel wheels L gearing with the bevel wheels D Theoil and water pumps are driven off the same bevel wheel D which serves to drive three intermediate shafts (3;, H and J.

Mitt

A shOIt vertical shaft M with a bevel wheel bevel wheel D is disposed radially with relation to the crank shaft axis and opposite to but not truly in line with the central intermediate shaft G as shown in Figures 1 and 3. The water pump N is of suitable type and construction and is mountedon or driven either directly or indirectly by or through the shaft M. At some suitable point in the length of the pump shaft M is mounted a skew pinion M or a worm which gears with two corresponding wheels 0 each of which is fixed on a shaft 0 which lies at right angles to the pump shaft M and parallel to the axis of the crank shaft B. -Each of these shafts 0 drives two coaxially mounted oil pumps I P Q arranged wise the drive being taken off the crank shaft from the bevel Wheel D which serves to drive the three intermediate shafts .G, H and J;

One of the oil umps P in each pair' serves to deal with t e oil which drains into a sump. suitably disposed below, the suction pipes P from this sump being shown in Figure 2. These two pumps P deliver through a pipe P to the oil tank. The other pump Q on each oil pump shaft 0 serves to supply oil to the engine this oil being drawn from the tank throu h a lateral connect-ion Q (Figure 2) an delivering upwards. The. delivery from one of these supply pumps Q, leads as at Q (Figure 3) into one end of the hollow crank shaft D which is carried out to a point over or adjacent to the oil pumps, A second delivery QF (Figure 2) from the supply pump Q, leads to the opposite end of the crank shaft. The other supply pump Q, de:

livers through a connection 4 to the cam shafts on the heads of the cylinders.

The coupling em loyed for the purpose of connecting the a utting ends of the two parts of each intermediate shaft, such as the two parts G G of the central intermediate shaft, may conveniently be constructed .in the following manner and as illus trated in Figure 1. Though as there shown,

in connection with the central shaft G G it is to be understood that a similar device may be employed for-coupling the two portions comprising each lateral intermediate shaft H and J The two abutting l ends of the shaft lengths G. and G are somewhat thickened and in each thickened part are formed one or more longitudinal keyways G G. In

each of these key-ways lies a corresponding key or feather S carried by a sleeve S which surrounds the joint. The key-Ways,

G extend to a greater distance along the.

are wholly clear of the abutting ends of.

'the shaft lengths G and G. When the sleeve S occupies this latter position itis possible to separate the ends of the shaft lengths G and G and the outer portion G can be independently. rotated or removed. To make the joint the ends of the two portions G G of the shaft are brought toether and the sleeve S is then slipped over them when the keys S will engage equally the key-ways G and G and thus serve to couple the ends of the shaft lengthsso as to transmit the drive. The sleeve S is retained in place by a bolt or pin S which passes transversely through the sleeve and through the abutting ends of the shaft lengths G and G circular notches 'being formed in the ends of these shaft lengths to allow of the passage of'the bolt. Thebolt S externally in a cylindrical guide or bearing S which is in turn .mounted in a boss K which forms part of the casing enclosing the intermediate shaft. Access can be had to the couplin by unscrewing a socket or sleeve K whic encloses; the couplingthis sleeve being then free to be slid along the tubular casing K.

By thus forming each intermediate shaft in two portions connected by a device such as described or by some other adjustable couplingof a like nature it is possible to set the timing of the cam shafts carried on the cylinder heads after' the parts have been assembled. Thus when the cylinders are in place the shaft length G can be rotated to adjust the timing of the cam shafts A A before the shaft'length G is coupled to the shaft length G.

The disposition of the parts and details of construction may be modified as found desirable and in accordance with the construction of the other portions of the eng What I claim as m to secure by Letters P atent is j 1. In an internal combustion engine, in

combination; a crank shaft having a bevel wheel fixed thereon, a rotary oil pump havinvention and desire see said means comprising a short shaft arranged with its axis radial to the axis of said crank shaft and having a bevel wheel mounted thereon which meshes with the bevel wheel on the crank shaft, said shaft extending between the pump shafts and being operatively connected thereto.

2. In an internal combustion engine the combination-of. three blocks of cylinders arranged sothat the axes of the cylinders lie in three planes relatively inclined about the crank shaft axis, a cam shaft mounted on the head of each block of cylinders, a bevel wheel on one end of each cam shaft, a crank shaft, a bevel wheel towards one end of the crank shaft and driventhereby, a second bevel wheel adjacent to the first bevel wheel and similarly driven by the crank shaft, three intermediate shafts through which the cam shafts are driven from the crankshaft all these three shafts lying truly radial with relation to the crank shaft axis, a bevel wheel on the outer end of each intermediate shaft gearing with the bevel wheel on the end of the corresponding cam shaft, a bevel wheel on the inner end of each lateral inter- .mediate.shaft these two bevel wheels gearand two magnetos each havin on its shaft a bevel wheel which gears with the second bevel wheel on the crank shaft as set forth.

3. In an internal combustion enginethe combination of three blocks, of cylinders arranged so that the axes of the cylinders lie in three planes relatively inclined about the the head of each block of cylinders, a bevel wheel on one end of each camshaft, a crank shaft, abevel wheel towards one end of the crank shaft and driven thereby, three intermediate shafts through which the cam shafts are'driven from the crank shaft all these three shafts lying truly radial with relationto the crank shaft axis, a bevel wheel on the outer endof each intermediate shaft gearing with the bevel wheel on the end of the corresponding cam shaft, a bevel wheel on the inner end of each lateral intermediate shaft these two bevel wheels earing with the bevel wheel on the crank s aft, a second bevel wheel dn one of the lateral intermediate shafts and positioned near its inner end, a bevel wheel on the inner end of the central intermediate shaft this bevel 4. In an internal combustion enginethe combination of three blocks of cylinders arranged so that the axes of the cylinders lie in three planes relatively inclined about the crank shaft axis, a cam shaft mounted on the head of each block of cylinders, a bevel wheel on ohe end of each cam shaft, a crank shaft, a, bevel wheel towards one end of the. crank shaft and driven thereby, a second bevel wheel adjacent to the first bevel wheel and similarly driven by the crank shaft, three intermediate shafts through which-the cam shafts are driven from the crank shaft all these three shafts lyin truly radial with relation to the crank s aft axis, a bevel wheel on the outer end of each intermediate shaft gearing with the bevel wheel on the end of the corresponding cam shaft, a bevel wheel on the inner end of each lateral intermediate shaft these two'bevel wheels gearing with the first bevel wheel on the crank shaft, a second bevel wheel on one of the lateral intermediateshafts and positioned near its inner end, a bevel wheel on the inner end of the central intermediate shaft this bevel wheel gearing with the second bevel wheel on the lateral intermediate Q shaft, two magnetos each having on its shaft a bevel wheel which gears with the second bevel wheel on the crank shaft, oil and water pumps, and means for driving these pumps off the first bevel wheel on the crank shaft as set forth. I

5. In an internal combustion engine the" combination of three blocks of cylinders arranged so that the axes of the cylinders lie in three planes relatively inclined about the crank shaft axis, two cam shafts mounted on the head of each blockof cylinders", gearing between the two cam sh'afts on each block of cylinders, a bevel wheel on one crank shaft axis, a. cam shaft mounted on end of one of the cam shafts in each pair, a crank shaft, a bevel wheel towards one. end of the, crank shaft and driven thereby, a second bevel wheel adjacent to the first bevel wheel and similarly driven by the I crank shaft, three intermediate shafts through which the cam shafts are driven from the crank shaft all 'these three shafts i lying truly radial with relation to the crank shaft axis, a bevel wheel on the outer end of each intermediate shaft gearing with. the bevel wheel on the end of the corresponding cam shaft, a bevel wheel on the inner end of each lateral intermediate shaft these two bevel wheels gearing with the first bevel wheel on the crank shaft, a second bevel' wheel on one of the lateral intermediate shafts and positioned near its inner end, a

bevel wheel on the inner end of the central intermediate shaft this bevel wheel gearing with the second bevel wheel on the lateral intermediate shaft, two magnetos each having on its shaft a bevel wheel which gears with the second bevel wheel on the crank shaft, oil and water pumps, and means for driving these pumps off the first bevel wheel on the crank shaft as set forth.

6. In an internal combustion engine the combination of three blocks of cylinders arranged so that the axes of the cylinders lie in three planes relatively inclined about the crank shaft axis, a cam shaft mounted on the head of each block of cylinders, a bevel wheel on one end of each cam shaft, a crank shaft, a bevel wheel towards one end of the crank shaft and driven thereby, three intermediate shafts through which the cam shafts are driven from the crank shaft all these three shafts-lyingtruly radial with relation to the crank shaft axis, a bevel wheel on the outer end of each intermediate shaft gearing with the bevel wheel on the end of the corresponding cam shaft, a bevel wheel on the inner end of each lateral intermediate shaft these two bevel wheels gearing with the bevel wheel on the crank shaft, a second bevel wheel on one of the lateral intermediate shafts and positioned near its inner end, a bevel wheel on the.

inner end of the central intermediate shaft bevel wheelon the lateral intermediate shaft, a water pump with its shaft disposed at right angles to the crank shaft axis, a bevel wheel on the end of the water A pump shaft gearing with the bevel wheel on "the crank shaft, oil pumps, and means for driving the oil pumps off .the water pump shaft as set forth.

7 7. In an internal combustion engine the combination of three blocks of cylinders arranged so that the axes of the cylinders lie in three planes relatively inclined about the crank shaft axis, a cam shaft mounted on the head of each block 'of cylinders, a bevel wheel on one end of each cam shaft, ,a crank shaft, a bevel wheel towards one end of the crank shaft and driven thereby,

three intermediate'shaffts through which the cam shafts are driven from the crank shaft all these three shafts lying truly radial with relation to the crank shaft axis, a bevel wheel on the outer end of, each intermediate shaft gearing with thelbevel wheel on'the end of the corresponding cam shaft, -a bevel wheel on the inner end of eachlateral intermediate shaft these two bevel" wheels gearing with the bevel wheel on the crank shaft, a second bevel wheel on one of the lateral intermediate shafts and positioned near its inner end, a bevel wheel on the inner end of the central intermediate shaft this bevel wheel gearing with the .65 second bevel wheel on the lateral interrazapsv mediate shaft, a water pump with its shaft disposed at right angles to the crank shaft axis, a bevel Wheel on the end of the water pump shaft gearing with the bevel wheel on the crank shaft, two sets of oil pumps on two shafts disposed parallel to the crank shaft axis, and gearing between the two oil pump shafts and the water pumpshaft so that the oil pumps are driven off the water pump shaft as set forth.

8. In an internal combustion engine the combination of three blocks of cylinders arranged so that the axes of the cylinders lie in three planes relatively inclined about the crank shaft axis, a cam shaft mounted on the head of each block of cylinders, a bevel wheel on one end of each camshaft, a crank shaft, a bevel wheel towards one end of the crank shaft and driven thereby, a second bevel wheel adjacent to the first 85 bevel wheel, and similarly driven by the crank shaft, three intermediate shafts through which the cam shafts are driven from the crank shaft all these three shafts lying truly radial with relation to the crank shaft axis and each of these shafts being divided at some point in its length into two 1 parts the ends of which abut, a detachable coupling for the abutting ends of the two parts of each intermediate shaft, a bevel wheel on the outer endof each intermediate this bevel wheel gearing withthe second shaft gearing with the bevel wheel on the end of the corresponding cam shaft, a bevel wheel onthe inner end of each lateral intermediate shaft these two bevel wheels gearing with the first bevel wheel on the crank shaft, a second bevel wheel on one of the lateral intermediate shafts and positioned near its inner end, a bevel wheel on the inner end of the central intermediate shaft this bevel wheel gearing with the second bevel wheel on the lateral intermediate shaft, two magnetos each having on its shaft a bevel wheel which gears with the second bevel wheel on the crank shaft, oil and water pumps, and means fordriving these pumps off the first bevel wheel on the crank shaft as set forth. 9. In an internal combustion engine the combination of three blocks of cylinders arranged so that the axes of the cylinders lie in three planes relatively inclined about the crank shaft axis, two cam shafts mounted on the head of each'block of cylinders, gearing between" the two cam shafts on each block of cylinders, a b'evel wheel on one end of one of the cam shafts in each pair, a crank shaft, a bevel wheel towards one end of the crank shaft and driven thereby, a second bevel wheel adjacent to the first bevel wheel and similarly driven by the crank shaft, three intermediate shafts'through which the cam shafts are driven from the crank shaft all these three shafts lying truly radial with relation to the crank shaft axis and each of .these'shafts being divided at some point in its length into two parts the ends of which abut, a detachable coupling for the abutting ends of the two parts of each intermediate shaft, a bevel wheel on the outer-end of each intermediate shaft gearing with the bevel wheel on theend of the corresponding cam shaft, a bevel wheel on the inner end of each lateral intermediate shaft these two bevel wheels gearing with the first bevel'wheel on the crank shaft, a second bevel wheel on one of the lateral intermediate shafts and positioned near its inner end, a bevel wheel on the inner end of the central intermediate shaft this bevel wheel gearing with the second bevel wheel on the lateral intermediate shaft, two magnetos oppositely disposed on either side of the crank shaft with their shafts at right angles to the crank shaft axis, a bevel wheel on the end of each mag to the crank shaft axis, and gearing between the two oil pump shafts and the water pump shaft so that the oil pumps are driven off the water pump shaft as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARTHUR JOHN ROWLEDGE.

Witnesses:

ROGER R. BAGGATT, ERNEs'r Risk.