US 1730659 A
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Description (OCR text may contain errors)
uct. s, 1929.
C?. B, JOHNSON ET AL RECIPROCATORY PISTON MACHINE Filed Dec. 6, 1928 5 Sheets-Sheet y m g M 0. JM o 6,07 lvl s Oct. 8, 1929. o. a. JoHNsoN ET AL 1330,659
-RECIPROC-ATORY PISTON MACHINE Vcd ATTORNEYS Oct. 8, 1929. o. a. JoHNsoN E1' AL RECIPnocAToRY PIsToN MACHINE Filed Dec. 6,l 1928 AEA f7 w @MW wf f f3; m w i @fm W n .y W v w A 1J HW C n w f @a 0 j 4 Q Patented oct. s, 1929v UNITED' STATES OSCAR '.B. JOHNSON, 0FV AROMAS,
AND HARRY M KORTBIGHT, OF WATSONVILLE,
vCALIFORNIA RECIPROCATORY-PISTON MACHINE Application led December G, 1928. Serial No. 324,147.
The invention relates to machines embodying reciprocatory pistons, such as engines,
compressors and pu1nps`,.and the present disclosure is devoted to an internal combustion engine.' f
'The machine is of the general type in which the main shaft is provided with a cam or cams instead of being in the form of a crank shaft, and in which the' pistons operate rollers 1o which engage the peripheral portions of said cam or cams, and it is the primary object of the invention to'provide anew and improved construction in which the cam-engaging rollers are mounted directly upon the linner ends of the istons and in which unique provision is ma e for holding the rollers in contact with the cohacting `cam edge. In carrying out the above end, the machine embodies a pair of cylinders and pistons or a number of suoli pairs, and for each pair, a
rocker is provided which is linked to the pistons to hold the rollers of the latter against the cam, and it is a further aimy to provide a novel construction of piston provided with unique means for supporting the rollers 4and the outer link pivots.
Yet another ob'ect is to provide a construction' which is rat er simple and' inexpensive, yet will be efficient, reliable and in every ao way desirable.
With the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, description being accomplished by reference to the accompanyingl drawings'. o
Fig. 1 lis a transverse sectional view through a V-type of engine embodying our invention. y t
Fig. 2 is a view similar to Fig. 1 but showing the invention in connection with va radial c linder engine in which the cylinders may either be stationary or may rotate about the shaft.
Fig. 3 is a vertical sectional view on line.
The form of construction detailed in Figs. 1 and 3 will first be described. lIn these views, 4 denotes a main shaft extending through a casing 5 which may be of any desired length according to the number of pairs of cylinders 6 which it is to carry. Only one pair ofsthese vc linders is shown and the description willige correspondingly abridged. T he cylinders 6 diverge from the shaft 4 and are suitablyrsecured to the casing 5, and between the inner ends of said cylinders, saidl casing is provided with an internal fulcrum support 7 of rigid nature. 'Two T-shaped rockers 8 have their Shanks 9 disposed at opposite sides of the fulcrum support 7, and 6o a fulcrum 10 passes through said Shanks and support.l The T-head 11 ofeach rocker 8 has its ends disposed at the inner ends of the c inders 6 and said head ends are swingalile into said cylinder ends during oscillation of the rockers.
Pistons 12 are disposed in the cylinders 6 and are Vprovided at their inner ends with rollers13 engaging the peripheral edge of a cam 14 which is secured to the shaft 4, and by 70 means of links 15, the pistons 12 are connected with the ends of thev rockers 8, said links and rockers being independent of the rollers 13 and serving to hold the latter tightly against the edge ofthe cam 14 dur- 75 ing all strokes of the piston. The cam 14 possesses two high points 180 apart and two low points 180 apiart and incident to one 'rotation Vof the s aft, effects a complete cycle (four strokes) of each piston.
In the preferred form of construction` herein illustrated, each piston 12 is provided acrossy its interior with two spaced lparallel longitudinally extending webs 16 integral t with', the head andthe skirt of said piston. 85
Between the inner, ends of these webs, the roller 13 is mounted by means of a bolt or the ylike 17 and appropriate ball or roller bearings 18.y The portions of the webs 16 between the roller 13 and the piston head, are inte- 90 grally connected by a wrist pin bearing body 19 through which a wristpin 20 passes for pivoting the outer ends ofthe links 15 to the piston, these links being disposed at the outer 5 sides of said webs 16. 'Preferably the wrist pin bearing embodies roller bearings 21. Similar bearings 23 (Fig. 3) are preferably employed at the pivotal connection 22 between the links 15 and the rockers 8, and
' other bearings 10* of the' same nature are pairs of cylinders 6a each pair, pistons, links, rockersvand rollers cam 14:a on the shaft 4.'
preferably associated with the fulcrum 10. In the construction shown in Fig. 2, two are shown and with such as those above described, are associated, all of the rollers contacting with a single If the engine be of @the rotating cylinder type, this shaft will of course be ligzed but otherwise the cylinders and the casing 5* to which they are secured, will be non-rotatably mounted and the shaft will be free to rotate.
It will be seen from the foregoing that rather simple and inexpensive provision has been made forus'e in the production of a reciprocatory piston machine, regardless of the exact type of the latter, dispensing with cranks-on the main shaft and replacing these cranks and the connecting rods with cams and rollers, the latter being directly carried by the istons. Thentoo, particular atten.
`tion is invitedto the novel arrangement of 'rockers and links which has been provided for insuring contact of the rollers with the cams at all times without anyparts having that within the scope of the invention as' i claimed, variations may be made.
1. In a reciprocatory piston machine, a shaft, two c lindersdiverging from said shaft, a rigidyfulcrum support'between the inner ends of saidvcylinders, a rocker fulcrumed between its ends to said fulcrum support, said ends of said rocker being swingable with two spacedA 3. In areciprocator 4shaft, two cylinders iiverging from said shaft, a rigid fulcrum support between the inner ends oftsaid cylinders, pistons in said cylinders cach provided across its interior parallel longitudinally eX- tending webs, Y'rollers AIdisposed one in each piston and mounted between the endsof said webs toward said shaft, wrist pinbearings carried by said webs betweenV said rollers and the piston heads, links disposed two in each piston and positioned lo itudinally of said pistons at the outer sides o wrist pins'engaged with said wrist pin bearings and pivoting the outer ends of said links to the pistons, a cam on the aforesaid shaft contacting with said rollers, and twin rockers fulcrumedto the aforesaid fulcrum support and pivoted at their ends to the inner ends of said links.
4. In a reciprocatory piston machine, a piston provided across its interior with twoi `spaced parallel longitudinally extending* fWeb's, a cam-engagingy roller mounted between'thexinner ends of said webs, bearing meansearried by said webs between said roller an(l the piston head, links disposed longitudinally of the piston at the outer side piston machine, a
of said webs, means pivoting the outer ends of' said links to said bearmg means and means for pivoting the inner ends of said links to another member.
In testimony lwhereof we have'hereunto i aflixed our signatures.
OSCAR B. JOHNSON. HARRY M. KORTRIGHT.
into said cylinders respectively, pistons in said cylinders, pivoted links connecting -said pistons with the adjacent ends of said rocker, rollers mounted on the --inner ends of said pistons independently of the ivots of said nks, and a cam on said sha t with which said rollers are held in contact by lsaid links and `rocker.
2. In a reci rocator piston machine, a shaft, two c" inders iverging from said shaft, a rigidyfulcrum support between the inner ends of said cylinders, a T-sha ed rocker whose shank'is fulcrumed to said ulcrum, the ends of the T-head of said rocker being swingable into said cylinders respectively, pistons in said cylinders, pivoted links connecting'said pistons with said ends of said T-head of the rocker, rollers mounted on the inner ends of said pistons independently of the pivots ofsaid links, and a cam on said shaft with which said rollers are held in contact by said links and rocker.