US1306939A - Charles isaac adams - Google Patents

Description

C. I. ADAMS INTERNAL COMBUSTION ENGINE.

APPLICATION FILED NOV-9.1917;

Patented June 17, 1919.

CHARLES ISAEC ADAMS, OF LONDON, ENGLAND.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented June 17, 1919.

Application filed November 9, 1917. Serial No. 201,022.

forming the en ine flywheel.

The present invention has for its object certain improvements in engines of the above type whereby in order to increase the efliciency of the engine by increasing the number of strokes for each revolution, the piston speed is increased so that a greater number of explosions per revolution may be obtained.

In accordance with this invention the connectlng rods of each piston are connected to an intermittently rotating body or crank, the movement of which is controlled by a suitable cam or cams the arrangement being such that the piston speed is considerably accelerated whereby the number of strokes completed by each piston per revolution of the engine may be increased. With the bulk of engines of this class as at present constructed, owing to the type of construction a, low piston speed is obtained, it is only possible to secure two strokes per revolution of the engine.

In order that the invention may be the better understood drawings are appended in which i Fig. 2 is a similar view illustrating an arrangement of the cranks and the cam operating said cranks. I F g. 3 1s a sectional view of an eng ne embodying the present invention.

Fig. 4 is a front view of said engine.

Fig. 5 is a sectional view showin the arrangement whereby fuel is supplied to the cylinders.

Referring to Fig. 1 of the accompanying drawings in which for the sake of clearness the action of a single cylinder only is shown.

In the said figure, 1 indicates the fixed shaft of the engine, and 2 the intermittently moving disk or crank. 2 indicates the rod connected to the crank and to the piston, not shown. In Fig. 1 it is assumed that the piston is at the commencement of the firing stroke when the parts would occupy the position shown. The motion of the crank, the

speed of which is somewhat higher than the speed at which the cylinders move, is intermittent, the arrangement being such that the crank case and with it the cylinders, carried thereby are moved through an angle of 90 while the crank itself moves through an angle of 180. By this means the piston speed is considerably accelerated.

The desired movement of the crank 2 is in the present instance secured by means of the parts shown in Fig. 2 in wh1ch is illustrated an arrangement desi ned for use with a four cylinder engine. 11 the figure referred to 4 indicates a cam path which is fixed relatively to the cylinders, 5 indicates the crank casin to which the said cylinders are attached. ivotally connected to the arms 2 are links 7 and 8 carryin at their outer ends rollers which engage t e aforesaid cam path 4. The rollers upon the links 7 and 8 are carried by slippers or equivalent means working in guides 7", 8 supported from and moving with the crank case 5. The outline of the cam path 4 is such that the crank is intermittently moved in the same direction as the case 5. Connected to each of the pins forming the pivots of the arms 2 2 are two connecting rods 2 which in turn are connected to the respective pistons in thefour cylinders.

' Referring to the engine shown in Figs. 3 and 4 as in Figs. 1 and 2, 1 indicates'the shaft upon which are revolubly mounted two double cranks indicated respectively by 2 and 9. Connected to the arms ofcrank 2 are the links 7 and 8 which links carry pins with rollers at either end, running in the cam paths 4 and with which links are associated other rollers 10, 11 preferably mounted on ball bearings and running in the guides 7 8*. Connected to the crank pins 12, 13 are the inner ends of rods 2 which rods at their outer ends are connected to the piston 14 moving in cylinders 15 which cylinders are mounted upon and re volve with the crank case 5. The cam path 4 is formed upon a disk or plate w which is disposed in the crank case and which disk is secured in any suitable manner to the shaft 1. 16, 17 indicate respectively the admission cranks, rollers engaging said cams, guides for said rollers, said guides moving With the crank case, links to which said rollers are attached, said links being connected to the cranks, the cams being of such outline that the cranks are intermittently actuated and the speed of the pistons for certain strokes is accelerated, admission and 8X1 haust valves for the cylinders, spring pressed valves for said admission and eX- haust, levers operating the valves, rods operating said levers, a second lever for the

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