US1184651A - Gas-engine. - Google Patents

Description

I. LE R. JOHNSTON.

lGAS ENGINE.

APPLICATION FILED FEB. 9. II9I4. y

Patented May 23,1916.

3 SHEETS-SHEET I.

mmm..

I. LE R. JOHNSTON.

GAS ENGINE.

APPLICATION FILED IEB. 9, 1914.'

Patented May 23, 1916.

3 SHEETS-SHEET 2.

'l mmm.

Ehm/mow 04% www www? in ner remission,

- inenten. W

lli

titl entrino ofi the 2-cycle type.

:or nennen?,

cnronntnssronon 'ro msmn .reime o..

ens-nnenvn tneelteation of mettere Potent. l

' dnnlioetlon tiled tetruery t, mit. Serial No. Stigter.

To all 'wltoartt may concertar.

Beit movin thatL-lssnc lin liter donnsnon, a citizen ot the llnited States, residing at Detroit," in the county oi Wayne and `State ci Michigan, have invented certain new and iis/etui improvements in Gros-Englnes or vwhich the tollovving is a specidcation.

This invention relates to internal combustion engines, and more particularly to that,y class thereof which are generally ovvn a rotary-type, and it has or one ot it objects the provision of sn engine oit thi/s class comprising a multi-cylinderheod rttntahle within a stationery casing -vvhi h contains the gas inlet and exhaust passages and charnhe'rs.-

invention has, iinrtherniore tor its object the improved construction and orgeniration oi the gas supplying mechanism which the present instance ycomprises tor establishing a supply ot gas under I. slight pressure, regardless oi the suction cstahlishcd'hy the rnovernent'ot the piston within each cylinder. l

linrther omects oi the invention vvill hereiinafter epnear and he particularly dened :in cieirns.

l he invention has heen clearly illustrated in the accompanying drawings, in which similar characters denote similar parte, and in which iignre l regorese ts a central longitudinal section oi' an internal combustion engine ernhodying iny invention.; v Fig. 2 is a crosssera tion on line 2--2 oi Fig. l. Fig. 3 is a sinnlar section on line 3-3 et Fig. l, the several vievvs mentioned thus' tar illustrating .en

eterring to the drawings, l0 denotes. a cylindrical casing or shell provided with lateinlly-ezntending` flanges ll whereby the saine may he secured A upon any suitable trarne. This shell is closed at one end loy a. cover or head l2 (see Fig. l), the hub portion i2 ont which is provided Withua hell' hearing i3 tor rotetahly supporting the seein shaft lt ot the engine et that point. tdirniliarly, the other end of the casing l@ is provided with a head orcover l5, the hoh gooition l5 ot which has a hall-bearing' lo tor supporting the shalt lt at that end. iironi the iforegoing it vvill he 'understood that the casing, together with its lcovers 'l2 and l5, are stationary members.

Mounted tor rotation Within the casing i0 and closely vtting Within the same, is a cylinderhead ll', one end oi vvhichis pro-A vided with a cover member 18 having its central `portion secured to a flange lt of the rnain shaft lt, While its' oppositel end carries a' cover-member 19, the hub i9 ot which is supported Within the huh extension ot the, casing cover l5 through the intervention ot a hell-.hearlng 20, thus holding the several parts in true central relation relatively to each other.. l

ln Figs. i to 3, the head i7 comprisestvvo sets et cylinders, designated in a general' Way ley fC .and QC", each set comprising` tour cylinders designated hy a, t, c, d, and e, f,

i y, it, respectively, the particular cylinders oftleach set being preferably so' disposed as to have their ares intersecting' each other at 'lll right angles, ond furthermore so arranged that the ones ot the cylinders ot one set are located angnlarly halt vvsy hetvveen the axes ont the second set. inasmuch as the engine ythus tar described is oi' the'tvvo-cycle type,

it tollovrs deringr, eech rotation oi the `rnain shaft and the cylinder head eight irnypnlses vvill loe imparted to the same at equally spaced intervals. Mounted tor radial reciprocation in the several cylinders above mentioned are pistons a", t', o, d, e",

f, g, it', respectively, each Aniston having a spindle 2l'entending1 therethrongh and provided at its outer ends with anti-friction rollers 22, one set traveling Within grooves Sil 23 oi" an eccentrically disposed resistance .nieniher 2t which is stationary and lreyed to the huh l5 oli the cover. lo, a lrey or spline 25 (see Fig. l). ln order to obtain uniformity of movement, the grooves 23 are preferably oi true eccentric shape, and the resistance member 2li is provided with tvvo sets oi such grooves 23, 25 respectively for the pairs oi" sets oi the pistons of the engine respectively, the organization being such that the high and low points of one groove vvill he` disposed halt" vvay, or at an ongle oi tortylive degrees (or an uneven multiple thereof) relatively to the high and lovv points ot the other set.

Referring to liig. 2, the cylinder head rotates in thedirection oi arrow' a, and the enhaust port 26 is so disposed inthe casing` that each cylinder will have a -toll communication' therewith when its piston has 4arrived at the innermost end olits stroke, or in other Words, the exhaust will commence Milli litt 4due to the spark-plu approximately degrees".TV before the end ter being commonf to both? setsaof cylinders C, C as" clearly seen-in 2Fig.}=l. A Awater space 29 Ais provided to preserve the moving parts at proper temperature. In order to prevent leakage in the outer ends of the cylinders duringthe compression stroke of the pistons, each cylinder is surrounded by a packing ring 30 seated within a corresponding recess in the cylinder.- and maintained in contact with the, inner bore of the casing by a spring 31 seated within an annular recess 32. fhis spring may be very light, because the centrifugal force exerted upon the ring 30 during the rotation of the cylinder head will be amply sufficient to maintain the ring i vent leakage. 'lhe same constructlon applies to the cylinders of the second set C" which exhaust through a port 33 communieating with the exhaust pipe 28 through a conduit 34. In order to support the lefthand end of the resistance member in proper relation to the shaft 14, a ball-bearing is interposed' between these two members at that point. Gas is supplied to the several cylinders through a pipe\ 35, coming from any suitable carbureter and communicating wit a conduitl36 provided on the cover 15 and having an aperture 37 through which the gas may pass into the space 38 which constitutes a gas chamber from which the gas is not only permitted to enter into the inner chamber 39.4of the cylinder head, but-is drawn thereinto by fan-blades 40 provided on the member 19 above mentioned, so that the rotation of the latter will tend to slightly compress the gas Within the chamberv 39 from which the gases may enter the several cylinders through slots 40', which not only act as ports but are furthermore utilized as guides for the anti-friction rollers 22 above described:

By referring to Fig. 2'it will be seen that the operation is as follows: The piston gu is near the end of its inward stroke and cylinder g is, and has been, in communication with the exhaust port 26. In this position of the pistonthe greater part of the exhaustA gases have already left the cylinder and the gas-inlet slots '40 are on the point of being uncovered, and will thus remain uncovered during the next succeeding movement of forty-live degrees. of the cylinder head movement. The charge of gas accumulated in the cylinder will then be compressed until the highest point of the eccentricpath of the grooves 22 has been reached, whereupon the charge is fired by an electrical spark,

Sas usual in machines of this class, t e spark-plug having itsinner end disposed wlthin a recess 45 30 in `close contact to preprovided for that purpose and into which the compressed. gas will enter as soon as the compresslon chamber formed mthe piston will be in-,register therewith. The same operation just described in connection with the piston g and its c linder g, prevails for each of the other cylinders and pistons of this particular set. i

The other set, and the operation pertaining thereto, are clearly shown in Fig. 3, the spark-plug S seated Within the recess 45 exploding the charge in the same manner as mentioned above, it` being understood that the several pistons a', b,"c, d', are controlled by the grooves 25 of the resistance melnber 24 above referred' to. While the gas of the carbureter pipe 35 enters into the gas chamber 38 through the port 37, gas is also carried to the opposite end of the machine through a conduit 46 opening into the conduit 36 and communicating at the other end with a conduit 47 constituting a part of the cover 12and opening through a port 48 into the gas chamber 49 from which the gas is taken by fan-blades 50 into the inner chamber 51 for distribution for the second set of cylinders.

I claim:

1. A gas engine comprising a casing having an exhaust port and a gas inlet chamber, a head mounted for rotation in said casing and having al series of consecutivelyoperative radial cylinders, pistons movable in said cylinders respectively, a stationary resistance member having a cam groove, a

device carried by each piston and extending through the cylinder Wall into said cam groove, means carried by said head for carrying gas under pressure into said gas'chamber, and a conduit connecting said gas chamber with each cylinder at a predetermined point of the piston movement. l

2. A gas engine comprising a casing having an exhaust port and a gas inlet chamber, a head mounted for rotation in said caslng and having a series of cylinders open attheir outer ends and adapted to registerl with said exhaust port, pistons movable in said cylinders respectively, a stationary resistance member having a cam groove, devices carried by each piston and extending through the cylinder walls into said groove,

' means controlled by the 'movement of said lll sistance member havinga cam groove, devices carried by each piston and extending through the cylinder walls into said groove,A

said cams, a stationary resistance member 15 secured at one end of the casing, spindles carried by said pistons respectively, and eX- tending through the Walls of the respective cylinders, and engaging said cams, a shaft, and a cover attached to one end of said head and secured to said shaft.

In testimony whereof l affix my signature in presence of two Witnesses.

SAAC LE ROY JOHNSTON.

- Witnesses:

CHAs. F. SCHMELZ, H. l). MACDONALD.

Images