US1776963A - Compressed-air engine - Google Patents

Description

Sept. 30, 1930. B. ARCHER COIPRESSED AIR ENGINE Filed Dec. 5, 1929 2 Sheets-Sheer. 1

I In v enior v 7077? Jraer A iiorney COMPRESSED AIR ENGINE Filed Dec. 3, 1929 2 Sheets-Sheet 2' In venior lywrfyg-A'wfi/er By Attorney iii) Patented Sept. 30, 1930 UNETE'D STA-TES- PATENT OFFICE.

I-IARRYI-B. ARCHER; or nononvrmzn, NEW YORK oomrnnssnn-nmnnemn Application filed. December 3,1929. Serial; 110-. 411;.3Q4;

This invention. relatesrto compressed air,

engines andmore particularly to. devices of this character of the reciprocating piston type 'Wherein'a piston is mounted for recip- 5 rocatory movementin=a cylinden intowhieh the charge of compressed, air is alternately admitted on opposite sides oi the piston A in a manner to. actuatethe same.

7 An important object ofi-the inventionis to 1 provide,. ina manner ashereinaztterset forth, a compressed'air: engine {of the aforementioned character h avingc -associ ate d therewith 'a valved compressed air reservoir or tank wherein the valves are provided w-ithimeans 15 actuated by the motor fori properly operat+ V ingthe' same. 1. 1 i

. Another important object of the invention resides injthe provision of automatically operated meansin the form" of a reciprocat- 4 ing valve' for exhausting the air from the cylinder.-

- .I jOther objectsof the invention are to providea compressed air engine; which. will. be simple in construction, strong, durable, efficient' in -its use and. which maybemanufactured atlow cost. Still further objects and advantages of the invention will become apparent from a study of the following specification, taken inc'onneotion with the accompanying drawings wherein like characters-act" reference designate a corresponding parts V throughout the several views, and wherein -Figure 1 isa view inrside elevation of'a I comp'ressed air engineconstructed in accordance with thisinv'entionr f I Figure 2 is a vertical cross-sectional view, taken substantially on the line 2-2- of Figure 1 and looking in the direction of the arrows. a

Figure 3 is a vertical tional view. thereof longitudinal sec- Figure-t is a. detail view in side elevation showingthe' means for connecting the intake valve operating lever With said intake valve in a manner toactuate the same. r Figure '5. is an end view of Figure v Figure 6 is an." enlarged detail view in tc perspeq iye ot j the reciprocating. exhaust valve th'e samebeingv shown turned upside down, i i p g V Referring to the drawings. in detail, the referencecharacter l designates an elongated cylinder having one endclosed through the 5 medium of :a removable head 2'secured by the threaded bolts 8 to a flangev 4: on the adjacent endofthe' cylinder. The head 2. is provided with. acentrally, disposed opening and .a-p ack'.- ing flangefithrough Whichslidably extends a-rod Gupon theinner end of whichis-mountedithe pistonl7;

Adjacent itsoppo'site end; the: cylinder. l-is provided with. laterally extending internallythreade'd necks8 forthereception ofone end of the threaded conductor pipe designated generally by the: reference character 9.. The .upper'ends'of theiair conductor pipe 9. are threadedinto the side of a compressed air. reservoir on tanklO-throngh the medium of the laterally extending; internally threaded necksll'and'th'e upper end of said pipe'9 extends a: slight: distance into :the. reservoir lOi-to provide a valve. seat 12 (see Figure The. opposite. endsof the reservoir 10 are 79 closed by removable heads 13 secured to the flanges l4 bythe. threaded .bolts l5i Brackets i 16 are-vertically disposed'in the reservoir 10 at a point adjacent the valve seat 12 and pivotally mounted on the upper endportion of said bIELCkGUlSi-fl valvel adaptedito'seat on theadjacent seat l2 for controlling the passage of air therethrough. "These brackets 16 arebifurcated and the valves 17 are pivotally. mounted therebetween, as at 18; andsaid valves are provided with a rearwardextension/ l9 betweeniwhich extension", adj acent" its free end, andsthewall ofthe reservoir *is inengaged onsaid extension19; The push rods 23have their upperends provided with bifurcated heads 24 for thereception. of the downwardly extending protuberances- 25 i on theopposite' end of. rockingbeami26 :whioh necks 8.

is pivotally mounted for vertical adjustment on the reservoir through the medium of a threaded standard 2? which has its lower end threadedly engaged in a socket 28 on the reservoir and the upper end of which is provided with a bifurcated head 29 between the furcations oi which the rocking beam 26 is pivotally supported, as at 30. The nut 31 is threaded on the standard 27 for engagement with the upper end 01": the socket member 28 for securing the standard in adjusted position.

Exhaust passages 32 communicate with the cylind 1 adjacent its opposite end and at a point diametrically opposed to the threaded As seen in Figure 3 of the drawings. the passages 32 extend longitudinally in the lower wall of the cylinder 1 toward the center thereof and are then directed outwardly and communicatewith the interior of a valve chest 33 which is secured, as at 3 1 tosaid cylinder 1. The valve chest 33 is provided with a removable closure plate 35 secured thereto by the bolt 36 and provided with a flange 37 which projects into the valve chest adjacent the wall thereof and terminates in spaced relation with respect to the wall of the cylinder 1. clearly seen in Figure 3 of the drawings. The tree end of the flange 37 prov des a shoulder in the valve chest 33 upon which is mounted for reciprocation a. slide valve 38 which is provided with a transverse port 39 adapted to be brought into registry with the outer ends of the exhaust passages 32. The valve 38 is provided, on its lower de, with depending ears 40 provided with longitudin lly extending slots l1 for slidablv receiving the T-heads 4-2 of the rods 43 which slidahly extend through one end wall of the valve chest 33, as at 4st. A supporting arm 45 is rigidly secured to the removable head ot the cvlinder 1 and has pivotallv mounted on its free end and at the intermediate portion thereof a lever 46 which is operativelv connected with the piston rod 6 throug h the medium of a pin and slot conuection 47. The lower end of the lever 16 is oieratively connected to the rod 43 through the medium o the connecting link 48. An exhaust pipe "-9 communicates with the interior of the valve chest 33 on the lower side thereof.

A supporting arm 50 is rigidly secured, as at 51. to one of the removable heads 13 of the reservoir 10 and on the free end of sa d 50 the intermediate portion of an actuatine lever 52 s pivotally mounted, as at 53. One end of the lever 52 is operatively connected to the piston rod 6 through the med um of he pin and slot connection 54. A vertically disposed standard 55 extends up wardlv from the top of the reservoir 16 and is provided with a. long tudinally extending head 56 on its upper end having upstanding flanges m on its longitudinal side to provide a channel for the slidable reception of a block 58 (see Figures 4 and 5). As seen in Figure 5 of the drawings, the head 56 is disposed adjacent the rocker beam 26 and on one side thereof. As seen most clearly in Figure 4, the block 59 is provided with a slot or recess 59 which comprises a pair of horizontally disposed longitudinally extending portions which have communications with each other through a diagonally extending portion 60.

The slot 59 is for the reception of a horizontally disposed pin 61 which projects laterally from the adjacent side of the rocking beam26. The block 58 is provided with a rearward extension 62 in the free end portion of which is disposed a transversely extending pin 63 which projects from the opposite side of the extension. A link 64: is provi ded with a bifurcated free end portion which embraces the extension 62 of the block 58 and is provided with a longitudinally extending slot in each of its furcations for the reception of the projecting end of the pin 63 and said slots are designated by the reference character 65. The opposite end of the element 64: is pivot-ally connected to the adjacent end of the actuating lever 52 as at 66. Means for supplying air under compression to the reservoir 10 is provided through the medium of a valved inlet 67 which is controlled through the medium of an actuating rod 68 pivotally connected to an arm 69 of the valve which is disposed in the air supply conduit 67 adjacent said'reservoir.

When the engine is in. operation, the piston 7 reciprocates in the cylinder 1 and the lever 52 is rocked on its pivot 53 through the medium of the pin and slot connection 54 with the piston 6 and the slot 58 is caused to reciprocate on the head 56 of the standard 55. The rocking beam 26 is thus actuated through the medium of the laterally projecting pin 61 which is disposed in the recess or slot 59 of the block 58, said pin moving into the different horizontally disposed portions of the recess as the slot reciprocates for imparting movement to the rocking beam 26. The beam 26 alternately unseats the valves 17 and air under pressure which is stored in the reservoir 10 passes through the conduit 9 and alternately enters the cylinder 1 on opposite sides of the piston 7, as will be obvious. The reciprocation of the piston 7 and the rod 6 also imparts movement to the lever 46 through the medium of the pin and slot connection 47 for reciprocating the valve 38 in the valve chest 33 and the movement of said valve is so timed with respect to the piston 7 and the valves 17 and as air is admittedto the cylinder on one side of said piston the port 39 in the valve registers with the exhaust passage 32 which has communication with the opposite side of the piston. The slot in the element 64 travels over the ends of the pin 63 in the extension of the block 58 and said block is of such length that the head 56 will be actuated only when the lever 52 approaches the end of its rearward and forward strokes. Air from any suitable source is stored under pressure in the reservoir 10 through the me- I dium of the valved inlet 67. It is further pointed out that the connection provided by the cross head 42 in the slots 41 of the valves 38 provide means whereby said valves will be actuated only when the lever 46' approaches the end of each stroke.

It is believed that the many advantages of a compressed air engine constructed in accordance with this invention will be readily understood, and although the preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of construction may be had which will fall-within the scope of the invention as claimed.

lVhat is claimed is 1. A compressed air engine of the character described comprising a cylinder, a .piston mounted for reciprocation inthe cylinder, a piston rod connected to the piston, a reservoir adapted to contain air under pres sure mountedon the cylinder in spaced parallelism therewith, pipes communicating with the reservoir and with the cylinder adjacent opposite ends of the latter, valve seats disposed in the reservoir on the ends of the pipes, pivoted valves disposed within the reservoir and adapted for engagement on the valve seats, integral tails on thevalves, coil springs engaged with the tails and the adjacent wall portions of the reservoir for yieldingly urgthe reservoir, the opposite ends of said beam in engagement with the adj acent ends of the push rods for alternately opening the valve in the reservoir, means for rocking said beam comprising a standard mounted on the reservoir, a channelled head on the free end of the standard and adjacent the rocking beam, a block slidably mounted in the channelled head and having a recess having connected horizontally disposed portions vertically oil'- set with respect to each other, a pin extending laterally from the rocking beam and disposed in the recess, a lever pivotally mounted on the reservoir, and connected to the piston rods for actuation thereby, said lever operatively connected to the slot for imparting reciprocatory movement thereto and means for exhausting the air from the cylinder. 7

In testimony whereof I affix my signature.

HARRY B. ARCHER.

ing the valves toward closing position, push rods slidably extending through the wall of the reservoir and engaged with the tails for alternately opening the valves for admitting air to the opposite ends of the cylinder, a rocking beam adjustably and pivotally mounted on the exterior of the reservoir and having its opposite ends engaged with the adjacent ends of the push rods for actuating the latter, means actuated by the piston rod for rocking-said beam and means actuated by the piston rod for exhausting the'air from the cylinder; 7 I

2. A compressed air engine of the character described comprising a cylinder, a piston mounted for reciprocation in the cylinder, a piston rodconnected to said piston, a compressed air reservoir associated with the cylinder, pipes communicating with the reser-. voir and with the opposite end portion of the cylinder, said pipes extending in to said reservoir, valve seats formed on the ends ofthe pipes within the reservoir, spring controlled valves pivotally mounted in the reservoir adjacent the pipes and adapted to seat on the valve seats for closing the pipes, push rods slidably extending into the reservoir for engagement with the valves for alternately opening the same, a rocking beam having its intermediate portion pivotally mounted, on'

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