US1019495A - Internal combustion engine. - Google Patents

Description

A. & R. LAFONTAINE. INTERNAL. GOMBUSTION ENGINE. APPLICATION FILED AUG. 28, 1911.

1,019,495. I Patented Mar.5,1912.

2 SHEETS-SHBET 1.

A. & R. LAFONTAINE. INTERNAL COMBUSTION ENGINE.

APPLICATION PiLED AUG. 26, 1911.

Patented Mar. 5, 1912.

Q 2 SHEETS-SHEET 2.

MM QN Witnesses UNITED STATES PATENT OFJHIUE.

ALONZG LAFONTAINE Ann nosamo'mrommns, or s'r. STANISLAS. QUEBEC.

. cannon.

,To g'ill whom Be it known that we, ALONZO LAFONTAINE and. RosAn 'o'LAroNTAiNn, both subjects of the: King of Great Britain, 'andresiding at St fStanislas, in the county of Champlain,

Province of. Quebec, Canada, have invented certain new and useful improvements in InternaLCombustwn En mes; and :we do hereby declare that the ollowing is a full,

clear, and exact description. of ,the invention, such as. will enable others skilled in the ra y n V Fig. 3,, through one of the cy der; and another object is to provide a simply,,constructed, compact, eflicient, and ecoartto which it appertains to make and use the same.

l The invention to be'hereina fte r described relates to internal combustion engines.

In order to more clearly'disclofset'he construction,operation, and usc-of-the invention,.,referencc should be had to the accoment. application.

Throughout the several figures of the inders; and Fig..5-1s a fragmentary sectional View showing. one set of pistons at the completion of thecompression-stroke. i j I l One object of the invention is to greatly ,1 simplify the valve construction and the valve operating parts; another object is to providemeans for mounting thefly wheel shaftfentirely outside of'the engine'cylinnom'ical engine with the fewest possible number of working parts.

Referring to the drawings in detail, 1 indicates any desired form or construction of asuitablebase from which extend the 'up-' rights or side arms 2 in which is .mounted the lateral spacing and supporting block 3 I "inthe upper concave face of which rests the upper cylinder of the engine. 011 the base ofthe machine is a second cylinder, an .exact duplicate of the upper cylinder. Preferably, each cylinder is jacketed or provided with a surromiding spaced wall.

Each cylinder receives motive 'fiuid through inlet openings or ports 4- through the side walls of the cylinder and close to the ODDO' ll5 uicifloatton ot Ietters Patent. Application fl led'August 28, 1811. Serial No. 646,335.

drawings forming part of the pres-v INTERNAL concussion ENGINE.

Patented Mar. 5, 1912.

site ends thereof. The exhaust passes from the cylinder through an outlet or exhaust "gitudinally reciprocable piston head 7, carried by the sliding piston rod 8. The corresponding rods of tlie'two cylinders are connected in pairs by yokes 8 which are slidably mounted on guide bars 9 extending from the end plates or caps of the cylinders. Each of these sliding yokes, in turn, is provided with a wrist pin 10 on which is journaled one end of a pitman 11. The opposite end of the pitman is journaled on one crank of the shaft 12 of the usual. fly wheel 13. This crank shaft, as clearly shown in Fig. 1, is journaled in the block. 3 and uprights 2entirely outside of either cylinder. From the feed ports or openings 4 the motive fluid passes along the ducts or grooves 14, in the interior walls of the cylinders until it gets bythe pistons 7. Then itrushes into the space between the pistons. As the pistons advance toward each other, the inner ends of grooves or ducts 14 will be closed or out off by them and the-charge will be compressed. As the pistons reach their inward limit and the charge is at its maximum com ression, it willbe exploded by the spark rom plug 15. The explosion drives the pistons apart and toward their initial positions 'at the opposite ends of the cylinders. Slidably mounted in one of each pair of the pistons is a block or disk 16 carried by a bar 17 slidably mounted in a tubular bore extending through the piston rod of that particular piston. Each bar 17 has only a limited sliding movement determined by the position of a stop pin 18 passed through the projecting portion of the bar and engaging the end of the corresponding piston rod, after each exhaust, as shown in Fig.3. It is held.in'this position by a leaf spring '190r the like secured at its center to one end of the guide bar 9 and arranged so that its opposite ends will be engagedby the'ends of the rods 17 just prior to exhausting, forcing the spring, temporarily, to the dotted line position, the full line position being restored again immediately upon completion of the exhaust.

Each of the blocks or.disks 16, when in the 'full line position of Fig. 3, is adapted in full line in Fig. 5, 'at this time.

' piston, is so proportioned as to completely number ot cylinders.

to close an exhaust port 20 in the corresponding piston 7. When in the full line position of Fig. 7, the port 20 is left uncovered. The uncovering of the port 20 is dueto the compression of the motive fluid before its explosion, and to its expansion at and after explosion. The port 20 is adapted to be alined with a similar port or exhaust passage extending through the cylinder Wall, such alinement' occurring at the instant that the piston 7 reaches its war- Ward limit. It will be remembered that the block'or disk 7 is in the position shown The exansive force of the exploded charge will )6 suflicient to hold the blocks in this position and overcome the power of the'spring 19 until the exhaust rushes out through the exhaust port 20 and the alined exhaust port ,in the cylinder. AS soon as the exhaust takes place, the spring ist'ree to act aml the blocks or disks 16 will be driven inward to cover the port 20. .\t the instant that the block 16' closes-the exhaust port 20. the inner ends of the ducts or grooves l-t will be uncovered by the continued rearward movement of the pistons 7. at both ends ot' the cylinders, thus admitting a fresh charge. That part 21 ot the piston. lying between the exhaust port 20 amt the inner end of the cover the inner ends ol the duetsor grooves it during the short time that any part. ol' the exhaust port '20 is in alinement with the exhaust port leading through the. cylinder wall. 3y such a construction. the valve htoeltanisin controlling the l'eed aml exhaust. is reduced to the simplest possible and is arranged with great compactness. .\t the same time. there is praetieallv no vibration. as has been clearly proved by artual operation.

It is obvious that the invention may be readily applied either to a single cylinder engine or to an engine of practically any Likewise. two oi more cylinders may be used with only a single piston in each and these pistons may be arranged to work alternatel in opposite directions or in the same direction. Ur. again, a single cylinder with a single piston therein may he used.

Only one preterred application of the in-- vention has been shown in the. present drawings. in order to clearly disclose the same.

It is thought that the operation and useof the invention will be clear from the pre ceding detailed description.

(.hanges maybe made in theconst ruetiou.

arrangement, and disposition of the several parts of the invention without in any way departing from the field and scope of the same and it is meant to include all such within this application wherein only a pret'erred form has been'diselosed.

Having thus fully descrihedour invention. what we claim as new and .desire to secure by Letters Patent is:

l. in combination.- an engine cylinder provided with an exhaust port. a piston slidably mounted in said cylinder and provided with an exhaust port adapted to be alined with the port in said cylinder, a block slidably mounted in said piston and adapted to close the port therein. and means for moving said block to operative position.

in combination. an engine cylinder provided with an exhaust port, a piston slidably mounted in said cylinde' and provided with anexhaust port adapted to be alined with the port in said cylinder, a hollow piston rod connected to said piston, a bar slidably mounted therein. a block can port in said piston. and means adapted to engage the aforesaid bar block.

3. in combination. an engine cylinder provided with an exhaust port, a piston slidably mounted in said cylinder and provided with an exhaust port adapted to be aliued with the port in said cylinder, a 1101- low piston rod connected to said piston, a bar slidably mounted therein, a block carried by said. bar and adapted to cover the port in said piston. and means for yieldingly engaging said-b: and actuating said l lt:('l\' as the aforesaid piston approaches the limit ol its outward movement.

l. in combination. an engine cylinder prmided with, an exhaust port and delivery dnrts. a piston slidably mounted therein and prmided with an exhaust passage adapted to be alined with the port in said cylinder, said piston being also' provided with a part adapted to ("over amt close the inner ends ol said delivery duets during such alinemeal. a disk'mounttal in said piston and adapted to close the port therein, and means l'or actuating said disk.

in witness wlu-reol' we have hereunto set our hands in the presence of two witnesses.

\l'iln ssest I and actuate said

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