US1518334A - Engine-power-increasing device - Google Patents

Description

Dec. 9, 1924. 1,518,334

A. H. MCMASTER ENGINE POWER INCREASING DEVICE Filed June 23, 1924V Patented Dec. 9, 1924. l

UNITED VSTATES 1,518,334 PATE-NT OFFICE.

ARTHUR H. MOMASTER, OF LOS, ANGELES, CALIFORN/A:

ENGINE-rowEa-Incnnasme nnvrcni Application led June 23,

a citizen of the United States, residing at Los Angeles, in the county of Los Angeles. and State of California, have invented certain new and useful Improvements in Engine-Power-Increasing Devices, of which the following is a specilication. i

My invention relates generally to engines, and more particularly to a device that is applicable to practically all forms of fluid pressure engines having reciprocatory pistons, the purpose of said device being to materially increase the power that is developed by the engine with whichsaidI device is associated. My present invent-ion is an improvement on the engine power in-` creasing devices forming the subject matter of my co-pending applications for U. S. Letters Patent filed April 30, 1923, andbearing the Serial Numbers 635,808 and 685,809.1

The principal objects of my present 'invention are to generally improve upon and simplify the construction of the devices disclosed in my aforesaid (zo-pending applications, as well as other forms of similar devices, to provide a relatively simple, practical, strong and durable power increasing device that may be advantageously employed in connection with internal combustion engines, steam engines or, in fact, any engine having a reciprocating piston that is acted upon by the expansion of fluids or by the ignition and combustion of gases, liquid hydrocarbon. pulverized coal dust. powder or other similar explosive substances.

My invention contemplates a device that functions as a pitman or connecting rod between the crank shaft and piston of the engine, which device in operation enables the piston to remain stationary7 for a substantial period of time at the inner end of its stroke or while at high center and while the crank to which said piston is connected is traveling approximately 90 through the upper portion of its circular path of travel, thus making it possible to obtain the maximum degree of power from the expansive forces of the Huid pressure that is admitted to or ignited within that portion of the combustion chamber above the piston.

With the foregoing and other objects in view, my invention consists in the features of construction, combination and arrangement of parts hereinafter more fully yde- 1924. serial no, "151,787:l y f scribed andclai'med, ,reference being had to the accompanying dravgngsgfin which-' Figure 1 is a vvertical Segtlntakenlengthwise through the ce11teri-ofane11gine cylinder having a reciprocating; piston'. and showing Vmy improved power increasing; device applied thereto; y l

Figure 2 is ai vertical .section taken on the line 2 2 of Figure 1;. Figure 3 isa vertical section similar, to Figure 1showing al modifiedform o ,f the engine power increasing device; y

Figure -4 is,a ,vertieal\ section taken on the lineftf-.AiofFigureBs 1 -,l.:;

Referring ,byE numeral n to the; accompanyille drawings.' and--pa1ftcular1=y` tafhe form of device illustratedin; 1 and 2, 10 designatesannseeeylnden 1 1 thapiston that 4visvarnan ed f0npperationwithin said Cylinder, 1-hte; Splzkrlna-.Qrfigntion-de- VCf thtfisiaeated'e tleghead ofthe Gylinder, an@ 13 the-.Crankshaft that is associated 4with the. en, ;ine,l;a1id vwhich isprovided with `a crank such as zltfor each cylinder. My :inventioncontemplates a wrist =pin 15. having-litsgendseseatcd in the wall of piston 11 .andthe intermediate portion of said `wrist pin is provided Vwith a pair of cranks 16 and 1*(` that arearranged diametrically oppositeto each otherfor- 180 apart.

A connecting rod or pitman 18 connects the crankg16 ofthe wrist pin with crank 14 of the. crank shaft'13, and connected to crank 17 of the wrist pinis one end of an auxiliary connecting rod' 19 that extends alongside of the greater portion of connecting rod 18.- A pin or bolt, such as 20, passes through a longitudinally disposed slot 21 that is formed inthe lower portion of connecting rod' 18, and said pin'is rigidly seated in the lower portion of the auxiliary connecting rod 19. The lower or outer end of auxiliary connecting rod 19 is provided with a substantially T -shaped slot'22 that receives a guiding lrail orbar 23 that is substantially T-shaped in crosssection and which is carried by the lower or outer ends of a pair of oppositely arranged arms' 24 that project outwardly from the skirt-'portion of the piston 11. This guide bar-'occupies a position at right angles to the axis of the crank upward, as desgnatedihy 213, se that lone During the opeiaton'ff thnn 'Wit-11 which myv improved device associated, piston l18 in, its travell'vibrates or swings alongside the'guidefbar 25, andas such movement takes place fthe lower end Aof the auxiliary 4connectln'g zrod 29" slides lengthwise upon the guide bar, dueto 4the engagement of the slotted lowerenditliereof with said guide bar. As crank 14, ifvlliichftravels in ,the direction indicated by the arrowV in'Figure 1, approaches an la'ngularlpositi'on approximatelyx 45 in' advanceof high 'center' position ofthe piston, the lwerend of'auxiliary v. conecting rod 19 is 'traveling on the approximately-straight"lowportion 'f of bar 25,

andas crank 14 passe's'f fronithis,v position l,to high center the' auxiliary ,connecting rod 19 will, through its' "connectioiiwithcrank l17,

to which connecting red-'11s iscon'nected; and as a result', pistonll willnialintain a prac.` tically stationary positibnfat itshigh center orlwhile 'thefrank-i's'pa'slsiig 'from a! l point A ,y approximately 45 inadvai'c'e'of high center to a point `fpprximatelyfg45f past high center. Du'ringthis 'timefth'e' compressed gaseous' fuel charge' is held'nnder maximum compression, and said compressed `charge is not fired until the crank and connecting rod are substantially out of toggle or at a point approximately 45 pastvhigh center. Asthe lower end of auxiliary rod 19 passes on to the curvedportion 26 ofthe guide rail, said auxiliary rod commences to Vmove upward, thereby swinging craink17'to its 'upperl limit of movement and, consequently, swing lng crank 16 to its downward limit of move ment, such action taking place during the travel of the crank from its high center position to a point approximately' 45 pasthigh center. This relative movement of the pistons'l is permitted by reason of the fact that pm 20 which is seated in the auxiliary connecting rod is arranged so as to slide freely through slot 21 in the main connectmg rod 18. When crank 14 has reachedl a point approximately 45 'past high center, the compressed gaseous fuel charge above the p1ston 1s ignited and the ex ansion following combustion drives the piston downward 'on its power stroke and' during the jdownwardswinging movement`of the crank ll4 and the u ward 'movementfthereof to 'a point approximately 45 in advance of high center, 'the two connecting' rods,' the pistons and wrlst pm all move as one part..

IIi tlie'mdilid construction illustrated in Figures' 3 and 4, wrist pin 27 is provided with an eccentric 28 that receives the upper end of main'connecting rod 29, the lower end of the latter being connected to crank SEU of crank sha-ft 31, and the upper end of that is carried by extension armson the piston of the engine, and the main and auxiliary connecting rods have la 'pin-and slot connection similar f to the pin-andslot connection between rods 18 and y19.

Gruidel bar 34 has an upwardly'curvedportion 35 and, as in the previously described construction, whenfthe lowerl end ofaux'ilfI iary 'connecting rod 32 travels en ,"'to'this upwardlycurved end portion :of'thfef guide v rail, 'the upwardv swinging movement of crank arm 33 moves eccentric`28 downward, therebyenablingthe piston with which the dev ice is' associated to remain stationary whilethe crank 30 is travelingthrough' the upper'portion of its path o f-travel ory from a ,pointapproximately 45 in advance'f'of highcenter to apoint approximately 45 past high center. f V

' While I have shown anddescribedfmy `improved device as being particularlydesigned for use in connection with internal combustion engines, it willbe understood that practically the same structure modified to suit conditions may be advantageously employed on practically all types of reciprocating piston engines, which are operated 'by steam, compressed air, crude oil, or by the practically instantaneous combustion of pulveriz'ed coal or the like Thus it will be seen that I have provided relatively simple, practical and efficient means for materially increasing the effectiveness of iiuid pressure engines, the mechanism employed being of such structure as to be easily and cheaply produced and readily installed.

It will'be understood that minor changes in thesize, form and construction of the various parts of my improved engine power increasing device may be' made and substituted for those herein shown and described without departing from the spirit of the invention, the scope of which is set forth inthe appended claims." I claim as my inventiont'- i 1. In an engine, the combination'with the pistonv thereof, and 'the 'crank shaft, of a wrist pin mounted in the piston* land'having a pair of bearing portions that are oifset relativeto the axis of s'aidwristl pin, a main connecting rod arranged between 4one of said bearing portions and the crank shaft, an

auxiliary connect-ing rod connected to the other bearing portion of said wrist pin and means carried by the piston and serving as a guiding bearing for the outer portion of said auxiliary connecting rod.

In an engine, the combination with the piston thereof, and the crank shaft, of a wrist pin mounted in the piston and having a pairof bearing portions that are offset relative to the axis of said wrist pin, a main connecting rod arranged between one of said bearing portions and the crank shaft, an auxiliary connecting rod connected to the other bearing portion of said wrist pin, means carried by the piston and serving as a guiding bearing for the outer portion of said auxiliary connecting rod and a pin and slot connection between the main and auxiliary connecting rods.

3. In an engine, the combination with the piston thereof and the c'ank shaft, of a wrist pin joui-nailed in the piston and pro- `vided with a pair of cranks that are arranged substantially opposite to each other, a main connecting rod arranged between one of said cranks and the crank shaft, an auxiliary connecting rod connected at its inner end to the other crank of the wrist pin, and a guide bar carried by the piston and with which the outer end of the auxiliary eoni'iecting rod engages.

4. In an engine, the combination with the piston thereof and the crank shaft, of a wrist pin journalled in the piston and provided with a pair of cranks that are arranged substantially opposite to each other, a main connecting rod arranged between one of said cranks and the crank shaft, an auxiliary connecting rod connected at its inner end to the other crank of the wrist pin, a

guide bar carried by the piston and with which the outer end of the auxiliary connecting rod engages and the two connecting rods having sliding pivotal connection with each other.

5. An engine power increasing device comprising a wrist pin for the piston of the engine, which wrist pin is provided with a pair of eccentrically arranged bearing portions, main and auxiliary connecting rods connected respectively to said bearing portions, the main connecting rod being connected to the crank shaft of the engine and a guiding bearing for the outer portion of said auxiliary connecting rod.

6. An engine power increasingdevice comprising a wrist pin for the piston of the engine, which wrist pin is provided with a pair of eccentrically arranged bearing portions, main and auxiliary connecting rods connected respectively to said bearing portions, the main connecting rod being connected to the crank shaft of the engine, a guiding bearing for the outer portion of said auxiliary connecting rod and the outer portions of said connecting rods having sliding pivotal connection.

7. The combination with an engine piston and crank shaft, of a wrist pin mounted in said piston and having an eccentrically arranged bearing portion, a rod connected to said bearing portion and said crank shaft and means associated with said wrist pin and rod for rocking said wrist pin to shift the position of the bearing portion thereon during a predetermined portion of each cornplete rotation of said crank shaft.

In testimony whereof I aix my signature.

ARTHUR H. MCMASTER.

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