US1148888A - Pneumatic motor-starting apparatus. - Google Patents

Description

APPLICATION FILED APR. 6. 1914.

Patented Aug/3, 1915.

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H. A. BROOKS.

PNEUMATIC MOTOR` STARTING APPARATUS.

Patented Aug. 3, 1915.

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PNEuMATlc MOTOR STARTING APPARATUS.

APPLICATION FILED APR. 6. |914.

Patented Aug. 3, 1915.

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H. A. BROOKS.

PNEUMATIC MOTORSTARTING APPARATUS.

1,14888, APPLICATION vFILED APR. 6. 19M.l Patented Aug.

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HARRY A. BROOKS, OF GLENDALE,

CALIFORNIA, ASSIGNOR TO CHARLES A. IDEAL, 0F

vLOS ANGELES, CALIFORNIA, AND MARVIN E. COX, OF SAN DIEGO, CALIFORNIA.

PN E'UMATIC MOTOR-STARTING. APARATUS.

annesse.

Specification of Letters Patent.

Application led April 6, 1914. Serial No.`830,094.

To all whom t may concern:

Be it known that l, HARRY A. BROOKS, a

\consist in the provisionof the novel and advantageous features and in the novel and improved construction, arrangement, and combination of parts and devices as will be apparent from the description and claims which follow hereinafter.

Objects of the inventionare to provide a novel and improved apparatus of the class specified vwhich is simple and compact in construction', strong and durable, easily appliedflto exlsting motors, light in weight,

economical 'to manufacture, install, and

maintain, easy and convenient to use, posl- -I tive and effective in operation, freed' from .the/motor shaft when it is not in operation, and by the use of which is avoided all danger of injury in case of back-firing or rotation of the motor shaftin a reverse direction.

in the art from -a consideration of thefollowing description of the preferred form 7 of yconstruction embodying the" invention, taken in connection with the accompanying drawings -in which-'4 Y i Figure 1 is a front elevational view of the apparatus, withvparts omitted and parts in sectlon; Fig. 2 is a partly broken front Aelej vational View of the apparatus, with some section; Fig.

omitted, taken on the line H Fig. 5 is a cross-sectional view ofthe appavratu's, with parts omitted and parts in changed position, taken on the line 5 5 of Fig. 2; Fig. 6 `is a perspective view of the crank, withfcurved wedges shown in dotted Other objects and the ,advantages of the' invention will be apparent vto those skilled lines; and Fig. 7 is a partly broken .and sectional view of the barostat disks.

The frame 10 has thereon a preferably integral pneumatic motor cylinder 11 which has one end thereof closed by a suitable head l2 and has its other end open. A valve 13 is arranged at'the head end of the cylindel 11 and preferably Vcomprises a closed cylinder 14 and an oscillatable member 15 which is provided with admission and eX- haust ports 16 and 17 which are adapted to register withfthe port; 18 in the cylinder 11. In the cylinder 11 is arranged a piston 19 having t ereon piston rings-20 andprovided with a wrist pin 21 to which is pivotally connected one end of a link 22 which latter has its other end pivotally connected to one end 4 of a crank 23 which extends through a slof.

24 in the open end portion of the cylinder l1. The other end portion of the crank 23 is formed with `a sleeve 25 provided lwith.

an ,extension 26 of increased diameter. A coil spring 27 is arranged on the extension 26 and has one end thereof secured 'to the extension and has the other end v28 thereof secured to the frame 10. l The put under tension during the outward stroke of the. piston 19 andis adapted to return the piston tothe inner or head end of the cyl- ,inder ll-the -latter preferably being inclined downwardly toward the head end to 'facilitate movement of the piston by the curved surspring. Outwardly inclined sleeve 25 and faces 29 are provided-on the have slidably arrangcd'- thereon `curvedl blocks or Wedges 30 which than the surfaces 29 .and end to the other.` vThe' large end portions of the wedges 30 are disposedon the small end' portions of the surfaces, and straps 31 are pivotally connectedto the large and small end portions of adjacent wedges 30. A cage 32 on the extension 26'bears on balls 33 which are arranged in -raceways 34 supported by an annular liange 35 which latter ispreferably formed integral with the frame 10. In a socket 36 on 'the crank 23 is arranged a spring 37 which is adapted to pressV-` againsta projection 38 on' the rear of areof less length one of the wedges 30 to move thewedges 30 .flange 39 which may be .formed on or secured Patented Ang.. 3, 1915.

diverge. from one i spring 27 is to the shaft which latter passes vfreely recess formed in a bracket 43 which may bel secured by cap screws 44 to the frame 10- and to a lug 45 on the cylinder 11. A pin 46 on the shaft 40 permits of cranking the shaft manually when desired. A dog 47 is adapted to engage with a projection 48 onl the rear side of* one of thewedges 30 to hold the wedges inwardly against the pressure of thepring 37 and out of contact'with theo set 39'; said doghaving thereon a pivot 49, bearing in thebracket 43, and an-.arm 50 to which is attached a wire 51 which which latter may be secured by a clamping block 53 and screws- 54 to a lug 55 on the cylinder 11.

compressed when the wire 51 is ulled to disengage the dog 47 from the projection 48, and is adapted to cause vrengagement of the dog 47 with the projection 48- whenfthe pull on the wire ceases.

The oscillatable member 15 of the valve 13 is 4carried by a shaft 57 which has one end thereof mounted vin a .bearing 58 in the rear end of the cylinder 14 andvhas the other end portlon thereof 4passing through the head 59 of the cylinder and connected to an arm 60 which latter is provided with a counterweight 61 at one end .thereof and with an odset portion 62 at the other end thereof.

In order that the oscillation of the member' 15 may be easily eected notwithstanding the pressure vof the air in the cylinder 14,

the shaft 57 has a substantially rectanguar portion thereof disposedbetween depending. anges are through elongated openings 65 in the shaft 57. Alever 66 has one end .thereof mounted on a pivot 67 which passes through the offset portion 62fand is secured by the jam nut 68. lever 66 is'attached one lendof a lcoil spring 69 which has itsothfer 'end suitably attached to theframe 10. i The spring 69 holdsthe lever 66 in contact with a grooved roller 70 which yis mounted' on. a pivot- 71 suitably;`v

mounted on the frame '10.' A projection A71 on the sleeve 2 5 is adapted tobeariagainst the roller 72 on the rear'fsidefof the lever- 66 to actuate thev lever to cause .movement of the' c )scillatablememberj V1,5 to'l the 'exhaust' and said'projectio'n 71 'isadapted' a' "projection 7 3 at the endposition, to engage with -the action of a barostat. press'or preferably consists of. a cylinder`7 6 passes throu-gh a tube 5 2` Interposed between-the lugr 55 and arm 50 is a coil spring 56 whichis lpuppet j,valve7 9 and has. a

79f mayl be connected to the 'mountedon an spring 84 which latter 63 on the member 15, and pins 64. passed through the anges 63 and l 1n size than theconlcal points 90 and are Y -into a lsocl'et l94 screwed `89.L The pressure of the spring, 93 may -be At a point between the ends. ofthe-4 .'lrality of spaced vi'c'o'rrug'ate of\ the lever 66 and, assisted bythe spring 69', actuate the -lever to cause movement wedges 30 inwardly to cause disengagement of the wedges with the annular odset 39 should the engine, not shown, -start to op-v crate Vthe shaft 40 in a reversev direction.

' An air compressor adapted to be operated b the shaft 40 is mounted on the frame 10 an has its operation controlled -through The air comhavi-n one end thereofopen .and having a head. 7 screwed inthe other end thereof. A spring-pressed valve 77 is arranged in the' cylinder 76 adjacent to the head 77,V and a hollow piston7 8 is arranged. in the cylinder/7 6, which piston has at its inner end a port. 8 0l at its outer end. An' oil ductj'? 8 andan air pipe any suitable manner. The piston' 78 has thereon an extension 81 whichis slidably extension 82von the cylinder 76and provided with a slot 83 for the receptionof vone end portion of a retracting has its other end suitably secured to the frame 10.

vA link 85 ,has one end portion thereof formed bifurcatedand mounted on a pivot cylinder 76 1n 86 on the extension 81, and it has the other Iend 87 thereof -formed'to contact with an eccentric 8 8 which is mounted fast on .the

-shaft -4(). The cylinder 76 is vmounted on .-a bracket -89 on 4the frame 10, and' saidl formed in the" inclined end portions at the upper part of a bar 92 which bar is 'pressed steam at its llower part by a spring 93 extending into 'the bracket adjusted by turning thesocket 94. The bar 92 has thereon an arm 95 provided with-"a hook 96 which is adapted to fit on .aprojection 97 on the rear side of the bifurcated end yof the'link 8 5. A casing'preferably cons istingof ahollow bottom 'part 98 suitablyse- 'cured to the f1-aine 10 and a hollow top part 99 screwed thereon 'has arran ed thereon a plu-- x hollow disks 100. Near. their centen-the top and bottom of adjacent disks 100 joined together by cir'- 'tact with the offset 39 by the crank shaft its motor to operate, the

cular walls 101. A stem 102 suitably secured to the upper of the disks 100 extends freely into a recess 103 at the top of the casing, and a hollow nipple 104 is suitably affixed to the lower of the disks 100 and extends through and is secured to the bottom part 98 of the casing by means of a hollow nut 105. A rod 106 extends freely through the central portion of the nut-105, nipple 104, and the disks 100. The rod 106 is formed with a conical point 107 at one en'd thereof which is fitted in a conical recess 108 of larger size formed at the bottom of the stem 102, and with a conical point 109 at the other end thereof which is fitted in a conical recess 110 of larger size formed at the top of the bar 92. Air from a suitable storage tank may pass to the casing through the port 111 and pipe 112 connected therewit shown but it will be understood that when the apparatus is applied on an automobile the tank may be disposed in any convenient position on the automobile. In the raised position of the link 85, the end 87 may bear against a lug 113 on the frame 10, and a shoulder 114 on' the front side of the bifurcated end of said lever may bear against a projectiony 115.

In operation-air under pressure having beeny admitted to the valve cylinder 14 Jthrough a suitable valve, not shown, in the pipe 116 which is connected to the storage tank-the wire-51 is pulled to effect disengagement of the dog 47 with the projection 48 so that the spring 37 may act to move the wedges 30 outwardly into frictional conof the iange 39, whereupon the air passing through the ports 16 and 18 drives the piston 19 and thereby effects a movement of the the .sleeve 25 to turn and' thereby jam the wedges 30 between the Asurfaces 29 and the offset 39 so that the latter turns with the sleeve 25 and causes the shaft 40 to turn. Should the shaft 40 while it is being turned faster movement ofl the offset 39 in a direction opposite to that of the sleeve 25 will cause the wedges 30 to move inwardly and operatively disconnect the offset 39 from the sleeve 25. Should the motory start to drive the shaft 40 in a reverse direction, the projection 48 will be moved to engage the stop and cause the wedges 30 to move inwardly and thus operatively disconnect the sleeve 2 5 fromfthel offset 39. When the piston 19 has completed about one half of its working 'stroke the projectionl 71 engages with the roller 72 `on the lever 66 and moves the lever to effect a movement of the member 15 of the valve 13- to close the port 18 to permit expansion of the air in the cylinder 11 to drive the piston 19 to the end of the stroke. At the time the piston The storage tank is not' vvalve 77 crank 23 to cause reaches the end of the stroke, the member 15 will have been moved to have the exhaust port 17 in registry with the port 18 so that the air may be exhausted from the cylinder 11 by way of the ports 17 and 18 and pipe 117 when the spring 27 acts to return the piston 19 to the head end of the cylinder 11. On the return stroke of the piston 19 by the spring 27 -the latter acts to turn the sleeve 25 so that the wedges 30 are moved inwardly and the projection 71 is caused to engage the projection 73 on the lever 66 and move the latter to eEect a ymovement of the valve member 15 which brings the ports 16 and 18 into registry at the end of the return stroke of the piston 19. The operation of the crank 23 by the piston 19 is continued until the motor starts, whereupon the wire 51 being `no longer pulled the spring 56V acts to cause a movement of the dog 47 into engagement with the projection 48 and the starting Iapparatus is freed from operative connection with the motor shaft 40.

When the shaft 40 is driven by its motor, not shown, the eccentric 88 is adapted to move the linkand cause the piston 78 to compress air admitted through the valve 79 and force the compressed air through the and through the pipe 79 to the storage tank. The compressed air exerts a pressure on the disks 100 in the casing and. causes the disks to crowd together and thereby cause a downward pressure on the rod 106. Vlhen the -pressure of the air reaches a predetermined amount, the pressure of the rod` 106 on the bar 92 is such that the hook 96 engages the projection 97 and the spring 93 acts on the bar 92 to have the arm 95 move'the lever 85 to raised position. When the pressure of the air in the casing falls,

' the disks 100 spread apart and exert less pressure on the rod 106 and hence on the bar' i 118 is radially nearer to the shaft 40 and misses the projection 119 when the shaft 40 is rotated by its motor.

While one form of the construction em- I bodying the invention has been particularly illustrated and described, many changes and 'modifications thereof will occur to those skilled in the artwherefore the right is reserved to all such changes and modifications as do not depart from the spirit and scope of the invention as defined 1n the appended claims.

I claim: 1. In apparatusof the class specied, the

l said sleeve,

combination of a frame, a motor thereon, a crank formed with a sleeve rotatively` mounted on the frame and operatively connected with thel piston of said motor, a shaft l having a ange thereon and 1passing through s ee tracting spring attached to the sleeve and tothe frame, means operatively connected With the sleeve and with the valve vof said motor for operatingthe valve, an air compressor, and an eccentric on -said shaft for operating the air compressor. l

3. In apparatus of the class specified, the

combination of a,frame,`a motor thereon, a`

crank formed `vvith a sleeve rotatively mounted on the frame and operatively connected with the piston of said motor, a shaft having a flange thereon and passing through wedges on'the sleeve adapted to frictionally engage with said iange, a retracting' spring attached to the sleeve and to the frame, means operatively" connected with "the sleeve and with the v alveof said motor for operating the j an eccentric on said shaft for operating the valve, ansair compressor,

air compressor, and means for controlling the operation of the air compressor by the eccentric.

4. The combination of a frame, a; crank formed with a sleevel and rotatively mounted on the frame, said. sleeve having curved 1nclined surfaces thereon, a shaft passing through the sleeve, and having a flange thereon, Wedges arrangedon said surfaces, and means on the sleeveand Wedges for vmov-ing the Wedges on said surfaces to cause formed with a sleeve and rotatively mounted y ed on the frame,

'the wedges to make frictional contact with saidflange.. l

-5. The combination of a frame, a crank on the frame, said sleeve having urved inclined surfaces thereon, a shaf passing through the sleeve and having a angei thereon, Wedges arranged onsaid surfaces, means on the sleeve and wedges for moving the Wedges on said surfaces to cause the Wedges to m'ake-frictional contact with said flange, and means including a' pneumatic"- motor for operatlng said crank.

6. The combination of a frame, a crank formed with a sleeve and'rotatively mountsaid sleeve having curved sleeve rotatively l ing afhook adapted to va crank formed with a pressor inclined surfaces thereon, a shaft passing through the sleeve and having a flange thereon, Wedges arranged on said surfaces, means on the sleeve and Wedges for moving the wedges Qn said surfaces to cause the Wedges to make frictional contact with said flange, means including a pneumatic motor for operating said crank, and an air compressor operatively connected with said shaft. -Y

7. The combination of a frame, a crank formed with a sleeve and rotatively mounted on the frame, clinedysurfaces thereon, a shaft passing through the sleeve and having a flange thereon, Wedges arranged on said surfaces, means on the sleeve and Wedges for moving the Wedges on said surfaces to cause the Wedges to make frictional contactwith said iange, means including a vpneumatic'motor for operating said crank, an air compressor operatively connected with said shaft, and means including a, barostat for controlling the operation of said air compressor.

8. In apparatus of the class specified, the combination of a shaft, an eccentric thereon, an air compressor, including a cylinder and a piston larranged therein, a link operatively connecting the piston With said eccentric, a retracting spring connected with said piston, and means including a barostat for said sleeve having curved 1n lcontrolling the operation of said, link by tric, including a spring-pressed bar carryt over said projection, hollowvdi'sks in said casing, and a ro operatively and said bar.

10. Apparatus of the class specified, comprising a frame, a pneumatic motor thereon, sleeve rotatively mounted on the frame and operatively connected with the piston of said motor,l a shaft having a flange thereon and assing through said-sleeve, Wedges on said s eeve adapted to mov@J outwardly to frictionally engage With said flange, a retracting spring attached to the sleeve and to the frame, means operatively connected With the sleeve and With the valve of said motor vfor operating the valve, an eccentric on said s aft, an air commounted on the frame, including a cylinder and a piston arranged therein, a link operatively connecting the last mentioned piston With said eccentric, a retractd 11o connected between said disks ing spring on the frame connected with theY l last mentioned piston, and means including a barostat on the framefor ccntrolling the operation of said link' by said eccentric.

11. Apparatus of the class specified, comprising a frame, a pneumatic motor thereon, a crank formed with a sleeve rotatively mounted on the frame and operatively con- .'nected with the piston of said motor, a shaft having a iange thereon and passing through said sleeve, wedges on said sleeve adapted to move outwardly to frictionally engage with the flange, a retracting spring attached to the sleeve and to the frame, means operatively connected with the sleeve and with the valve of said motor for operating the valve, an eccentric on said shaft, means on the frame for compressing air, including a' cylinder and a piston arranged therein, a link adapted to operatively connect the last mentioned piston with the eccentric and hav ing a projection thereon, a casing on the frame, and means actuated by compressed air in said'casing for controlling the operation of thelink by the eccentric, including a spring-pressed bar carrying a hookadapted to t over the projection, hollow disks arranged in said casing, and a rod operatively connected between said disks and said bar.

12. In apparatus of the class specied, the combination of afframe, a pneumatic motor thereon, a crank formed with a sleeve rotatively mounted on the frame and operatively connectedwith the piston of said motor, said sleeve having curved inclined surfaces thereon, a shaft having a iange` thereon and .passing through said sleeve, wedges arranged on said surfaces, means inycluding a dog for holding said wedges from outward movement on the surfaces, and. means on the sleeveand wedges for causing outward movement of the wedges on said surfaces to have said wedges frictionally engage' with said ange.

13. In apparatus of the class specified, the combination of a frame, a pneumatic motor' thereon, a crank formed witha sleeve rotatively mountedon theframe and operatively connected with the piston of said motor, said sleeve having curved inclined surfaces thereon, a shaft havina ange thereon and passing through sai sleeve, wedges arranged on saidsurfaces, means including a the frame adaptedy to move said wedges out fof frictional engagement with said iange when said shaft is operated in afr'everse direction.

14. The combination of a frame, a motor having a valve including an oscillatable member, a crank formed with a sleeve ro- `tatively mounted on the frame and loperatively connected with the piston of said motor, a shaft passing through the sleeve and having a flange. thereon, wedges arranged on the sleeve and adapted to frictionally engage` with said ange, a retracting spring connected to the sleeve and to the frame,

a lever operatively connected with said .os-v

cillatable member, and means on said sleeve and leverfor 'operating the lever.

15. The combination of a frame, a motor having a valve including an oscillatable member, a crank formed with a sleeve rotatively mounted on the frame and operatively connected with the piston of said motor, said sleeve having curved inclined surfaces thereon,` wedges arranged onsaid surfaces, va shaft having a ange thereon and passing through said sleeve, meansA including a dog for holdingsaid wedges from outward movement on the surfaces, means on' the sleeve and wedges for moving the wedges youtwardly on saidsurfaces to cause the wedgesl to make frictionalcontact with said ange, aV retracting spring connected to the sleevean'd to the frame, a lever operatively coiected with said oscillatable member, and means o n said sleeve and lever for operating the lever.

:in testimony whereof, I have signed my name ,to this specification, in the presence of two subscribing witnesses, at Los Angeles, county of Los Angeles, State of California,

thisvth day oi' March, A.l D.,19'14.

HARRY A. BRooKs.

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