US1777799A

US1777799A - Windshield-cleaner motor

Info

Publication number: US1777799A
Application number: US549173A
Authority: US
Inventors: Alvah L Just
Original assignee: Trico Products Corp
Current assignee: Trico Products Corp
Priority date: 1922-04-03
Filing date: 1922-04-03
Publication date: 1930-10-07
Anticipated expiration: 1947-10-07

Description

Oct. 7, 1930. v A. L. JUST 1,777,799

v WINDSHIELD CLEANER MQTOR Filed Aprii 5, 1922 2 Sheets-Sheet 1 Patented Oct. 1930- I UNITED STATES PATENT OFFICE ALVAH L. JUs'r, or SYRACUSE, NEW YORK, ASSIGNOR 'ro TRiCO rnonuors CORPORA- TION, or BUFFALO, NEW YORK wINDsHI'ELn-cLEANEn MOTOR Application filed April 3,

I This invention relates to improvements in. windshield cleaners. and has for its object to provide a novel and simple device of the class, which may be operated by either fluid pres- 5 sure, or by the suction of the ordinary internal combustion engines employed for propelling motor vehicles. A further object is to provide novel and simple means for starting. stopping, and for controlling the speed of the cleaning member, and a further object is to provide novel and simple means for admitting atmospheric pressure to one end of the actuating cylinder, while the suction is being applied to the opposite end of the cylinder.

- I attain these objects by the means set forth in the detailed description which follows and as illustrated by the accompanying drawings, in which- 0 Figure 1 is a rear side elevation of the complete device applied to the Windshield of an automobile. Fig. 2 is an end elevation ofthe same. Fig. 3 is a top plan view of the complete device. Fig. 4.is a front side 5 elevation of the same.- Fig. 5 is a central vertical longitudinal section, taken on line 5-5 of Fig. 2. Fig. 6 is a vertical longitudi-- nal section, taken on line 66 of Fig. 7. Fig. 7 is a vertical cross-section taken on line 7'7 0 of Fig. 6. Fig. 8 is a bro en rear face view of the bracket which supports the cylinders and the valve. Fig. 9 is a similar view with the valve removed. Fig. 10; is a rear face view of the valve. Figs. 11 and 12 are de-' tached views of the connected pistons. And Fig. .13 is an enlarged view, showing the disc valve and its actuating parts.

In the drawings 2 representsthe trans.

parent part of an ordinary windshield, and

2 is the top rail of its frame.

My improved cleaner consists of the fol lowing parts 3 represents a frame or body, which supports all of the cleaner parts and which is preferably made of any sultable metal; From the opposite sides of the body 3 extend similar integral arms 3, both of which are perforated for attachment to the rail 2'. by screws or bolts 2 l'represents a casing orcylinder, whose ends are preferably tightly closed by caps 4.

shown), and the cleaner.

1922. Serial No. 549,173. 7

At one side of the cylinder the wall is cut away, to provide a circumferential opening 4 a' portion of the metal at the top and bottom of said opening being bent outwardly, to form lugs or cars 4",which are perforated. In this opening 4 is inserted the rear end of the main body 3, as best seen in Fig. 7, and these parts are then detachably secured'together, by means of screws 4, which pass through the perforations in the ears 4", and

are threaded into the top and bottomfaces of p the body 3. Within the cylinder 4 are disposed similar spaced pistons 5 5, which comprise outer disks 5, cup-shaped members 5", of any pliant material, and inner disks 5, all of which are held in place by bolts '5. The pistons are suitably spaced and connected for movement, as one part, by means of a substantially flat sheet-metal spacer 6,

as bestseen in Figs. 5'; Hand 12. The opposite ends of the spacer 6 are provided with to hold the pistons, as well as the spacer, from rotation inthe cylinder. The cylinder 4;, in the present case, is stationary, and only the pistons, the cleaning membenand the valve and its operating parts move. The pistons 55' are-preferably operated by the suction produced by the engine pistons, and for this purpose a pipe 7 forms the communication between any suitable'part of the'engine (not This pipe 7 connects directly with the main body 3, which is bored out of 7 to receive one end of the said pipe. The port? connects with an angular passage 7*, which terminates at an exhaust port? in the rear face of the body 3 constituting a valve seat, as shown in Figs. 6, 7, 8

. and 9. The passage or duct 7 connects with a threaded opening. 8, which is normally closed by a needle-valve '8, the inner end of i which controls the passage 7* (see Fig. 7

and therefore the starting and stopping, as well as the various speeds at which the cleaning member may be operated. The exhaust port 7 b is controlled by a disk-shaped rotary valve 9, which is pivoted preferably on a pivot post 9 the latter being anchored in the body 3. The disk 9 is held resiliently and from accidentalmovement, against the face of the body 3, by a spring 9, and a washer 9", carried by said post. The valve 9 has a limited rotary movement by means of a peripheral cutout 9 providing spaced parts or shoulders, andby a stop-pin or stop-post 9 which is also rigid to the body 3 (see Figs. 5, 6, 7 and 8). The opposite edge of the valve 9 is also provided with a similar cutout 9 providing spaced parts or shoulders, which receives the arm 10 of an inverted L-shaped lever 10, which is pivoted on the post 9 and serves as the actuator for the valve 9, the arm 10' contacting with said spaced parts or shoulders on the disk. The lever 10 extends downwardly (see Fig. 7) parallel to the valve and the body 3, and its lower end is formed into a hook 1O at the opposite side of the pivot point of the valve disk, to which a tension spring 10 connects. The upper end of the spring 10 is connected to the corresponding end of a lever 11, mounted rigidly on a shaft 12, which is journalled in the top portion of the body 3. The lever 11 is swungby the movement of the pistons preferably in the folowing manner: The lower free end of the lever 11 is provided with a stud or pin 11', which is disposed and plays in the slot 6 of the spacer 6. .By this construction and arrangement, the reciprocatory movements of the pistons and spacer, as shown by the full and dotted lines in Fi 5, rocks the lever 11 (and also the shaft 12%,. back and forth past the valve 9, as shown by the full and dotted lines in Figs. 5 and 6. 12" re resents the cleaning member, which is rigi 1y mounted on the outer end of the shaft 12, which projects through the rail 2, and consists of a rod or arm 12, and the cleaning element proper 12". The element 12 is preferably pivotally mounted in a holder 12 by a in 12 which allows said part to readily a just itself to the outer surfae of the windshield.- The holder 12 is preferably rigid on the'free end of the rod 12. 1

To operate the pistons 5-5 by the suction of the engine, as described, I provide two similar tubes 13-13', which extend in opposite directions from the body 3,. along the outer front side of the cylinder 4, as shown in Figs. 2, 3, 4, 8 and 9. The corresponding ends of the tubes 1313 are inserted in openings 1313? at the opposite sides of the body 3, and communicate with combined inlet and exhaust ports -13 .13 which are disposed at the opposite sides of the main exhaust or suction port 7'. The opposite or outer end-portions of thetubes13--13' are bent, and

the ends thereof are inserted in perforations 4 which are disposed close to the caps 4, and just beyond the extreme travel of the pistons. In order to connect the ports 7 and 1313 for communicating the'suction to the opposite ends of cylinder 4, the valve 9 is provided in its bottom face, (see Fig. 10) with a grooved passage or blind recess 9. The groove 9 is so positioned and proportioned that, when the valve 9' is rotated in opposite directions by the lever 10 (see Figs. 5 and 6), a free passage is effected between the port 7 and the ports 1313 as the case may be. In order to prevent the establishment of a vacuum in one end of the cylinder,

while the pistons are being drawn towards.

the opposite end, the valve 9 is provided with two perforations '9 and 9*, which are disposed a certain distance beyond the opposite ends ofthe groove 9. By this arrangement when the valve 9 is rocked towards the right, the perforation 9 is brought into register with the port 13", which admits atmosphere through the said ports 9", 13 and tube 13 into the left hand end of the cylinder into the tube 13, and when the valve is rocked toward the left, the perforation 9 (see Fig. 8) is brought into register with the port 13, which admits the atmosphere through the said ports to the tube 13' and thus to the.right hand end of the cylinder. The oscillatory movements of the cleaning member 12' is effected by the rocking to and fro of the lever 11 through the reciprocatory action of the spacer 6 and the pistons 55, and the movements of these parts always correspond, since they are both rigid on the shaft 12. The timin of the strokes-,of the cleaner 12 may be e Iected by the manipulation of the needle valve 8, by

which the unscrewing of the said valve speeds up the cleaner 12, while the inward screwing of said valve slows d wn the cleaner, or stops its operation entirely. The forward and backwardmovements of the lever 11 have no direct ac'tion on the valve 9, there being no connection between these parts except through the spring 10". The valve 9 is operated directly by-the lever 10, through its arm 10', which plays in the .cutout 9, as de scribed. The operation of valve 9, is as follows: Assuming that the pistons 5-5 are positioned at the left endof the cylinder 4, as shown by the dot-ted lines in Fi 5, and that the suction is applied to the right. end of the cylinder, by means of the tube 13, the pistons are then drawn towards the right until they reach the full line position, shown in Fig. 6, and the corresponding position, shown by dotted lines in Fig. 5. This movement of the pistons, through the spacer 6, which is always in engagement with the lever 11, swings said lever from the position shown at a in Fig. 5, to that shown at b, in Figs. 5, 6

movement of the lever 11, the valve 9 and its actuating lever '10 remain stationary, as shown by the dotted position 0, in Figs. 5, 6 and 13, until the lug or spur 8 carried by the spacer 6, engages and swings the lever 10 towards the right. The spur 6 (as well asthc spur 6 is arranged to come to a stop beneath the center of the valve 9 (see dotted lines in Figs. 6 and 13). By the time the spur 6 comes to said stop, as described, the lever 10 is moved past the center of the valve, and the spring 10", whose tension has been increased by the completion of the stroke ofthe lever 11,fjerks the lever 10 towards the right,

as shown by the full lines in Fig. 6. ,This last quick movement of the lever 10, shifts its arm 10 from its engagement with the righthand end of the cutout-9 to the opposite end of said cutout (see dottedlines in Fig. 6),

after which said arm rotates the valve, to the extent shown by the-full lines in

Figsj

6 and 13. This positions the groove!) forestablishingfcommunication between the port 7 and the port 13,which shifts the suction from the pipe '13 to the pipe 13 and effects the return movement of the pistons towards the left, and so on; By thus delaying the action of the'valve 9, the atmospheric communication with the opposite ends of the cylinder is maintained practically throughout the full power stroke of the pistons, which greatly reduces the resistance, as well as the wear and tear upon the operating parts, and incidently,

' the said provision tends to greatly increase entirely automatic in its action from the time- 'the needle valve 8 is opened until it is closed. The device is simple, compact and light, and

ders'toodthat the suction of the 1- the power of the strokes of the cleaner 12,

which is avaluable feature, when it is un- I gine that is available for operating the windshield cleaner is not, as a rule, very strong, particularly nearly so. v a The device herein shown and described is can be produced at relatively small cost, and when properly constructed and installed needs no attention nor care except as here in above explained.

Having thus described myrinvention what I claim, 1s.- 1 v '1. A valve construction for fluid motors, comprising a body having a valve seat, a

valve disk in contact with said seat, a pivot" post on said body pivotally mounting the disk to oscillate to and from two operative positions on said seat, a stop postmounted on the body and coacting with the disk for limiting its oscillatory movement, a lever pivoted on one of-said posts and-having an end engaging a-portion of said disk at one side of the pivot of said disk and having another end extending to the opposite side of said pivot, a second "lever pivoted on said body to swing one of its ends from one side whe'nthe throttle is wide open or oi-the pivot of said disk. to the other side of the pivot of said disk, a spring connector between the extending end of said first lever and said second lever, an end of said spring connector being moved by said second lever from one side of the pivotof said second lever to the other side of its pivot, means for swinging the second level-. to shift its end of the spring, and means for swinging the first lever duringa portion of the swing of the second lever to shift its end of the spring to shift the spring from one side of the pivot of the disk to the other side of the plvot of the disk, whereby the disk is snapped from one operative position to the other.

2. A valve construction for fluid motors, comprising a body having a' valve seat, a valve disk in contact with said seat and having spaced parts, a pair of posts onthe body, one post being positioned. to contact alternately with said spaced parts of said ,disk as the disk is moved to determine the operative limit positions of said disk, the

other of said posts pivotally mounting the other side-of the pivot of said disk, a spring connector between the extending'end of said first lever and said second lever, an end of said spring connector being moved by said second lever from one side of the pivot of saidsecond lever to the'other side of its" pivot, a reciprocablemember having a part adapted to contact with the second lever to swing said second lever, whereby its end of the spring is shifted, and a part for engaging and moving said first lever during a portion of its movement of the second lever whereby the end of the spring on the first lever is shifted during a portion of the movement of the second lever and the spring is shifted from one side of theapivot of the disk to the other snapping the disk from one operative position to the other. a

3. A valve construction for fluid motors, comprising a body having a seat provided With an exhaust port and a pair of inlet and exhaust ports, a valve disk pivoted on said body to move on said seat to and fromtwo operative positions, said valve diskihaving in its face contacting with said seat a. blind' recess portion adapted in one operative positlon to place the exhaust port in communication with one of the inlet and exhaust ports and in'its other operative position to placethe exhaust port in 'oommunlcatlon i is with the other inlet and exhaust port, a lever pivoted on said body and having an end engaging a portion of said disk to move it, a second member mounted on said body and having a portion movable first to ,one side and then to the other side of the pivot point of said valve disk, a spring connected to a part of said lever and to said portion of said second member, means for moving said secondvmember and for moving said lever a distance with said second member whereby said spring is shifted from one side to the other of said pivot point, snapping the disk from one of its operative positions to the other.

4. A valve construction for fluid motors comprising a body having a rock shaft to be operated journalled therein, said body with its rock shaft being removable as a unit from the cylinder of said motor, a seat on said body provided with an xhaust port and a pair of inlet and exhaust ports, a valve disk pivoted to oscillate on said seat to and from two operative positions, said disk having in a face contacting with said seat a recessed portion adapted in one operative position to place the exhaust port in communication with one of the inlet and exhaust ports and in its other operative position to place the exhaust port in communication with the other inlet and exhaust port,

a lever pivoted on said body and having an end engaging a portion of said disk to move it, a second member fixed to said rock shaft and having a portion movable first to one ment of said rock shaft a predetermined distance in one direction to place said disk and said lever underspring tension tending to moveisaid disk from one operative por sition to,another when the rock shaft has traveled a predetermined distance. v

5; A device ofthe class described comprising a tubular body, a. pair of oppositely disposed spaced pistons movable in said tubularbody,a-piston rod connecting the pistons for simultaneous movement, fluidconduits connected to the opposite ends of said body,

a rock shaft, avrock arm connected ,to the shaft, an operative connection between said rock arm and said, piston rod including spaced parts on one of said connected elements and a parton the other of said connected elements interposed between said spaced parts, a main suction line, a valve controllingcommunication between the main suction line and either of said first-named tons for simultaneous movement,

fluid conduits, a pivoted lever having one end engaged with said valve, a spring connecting the opposite end of said lever with the rock arm, and means movable with the piston rod for eifecting an initial movement of said lever from one limit of movementto a position where the spring will suddenly snap the lever to its opposite limit of movement.

6. Mechanism of the character described, comprising a cylinder, spaced pistons recipe rocal therein, a member connecting the pistons for simultaneous movement, uid conduits connected to the opposite ends of the cylinder, means for alternately applying suction to said conduits including a suction line, a valve for bringing said suction line alternately into communication with said fluid conduits, a lever for actuating said valve, a power-transmitting rockshaft, an. arm fixed to the shaft and rockable back and forth by the piston-connecting member to opposite sides of the mounting of said lever for oscillating the shaft, resilient means connected at its opposite ends to the lever and arm and having its endsmovable to opposite sides of the mounting of said lever, that end of said resilient means which is connected to the arm being moved back and forth to opposite sides of the lever mounting by and during movement of said piston connecting member, and means operable by the pistonconnecting member to initiate an oscillatory movement of the lever, subsequent to the movement of the arm-attached end of said resilient means from one side to the opposite, side of the" lever mounting, for moving the lever-attached end ofthe resilient means-to a position from which said resilient means will continue said oscillatory movement of the lever to effect actuation of said valve.

7. Mechanism of the character described,

comprisinga cylinder, spaced pistons recip- Y the'pisuid conduits connected to the opposite ends of the cylinder, means. for alternately applying suction to said conduits including a suction line, a valve for bringing said suction line alternately into communication with said fluid conduits, a lever having a play connection with the valve for actuatin the valve subsequent toia predetermined idle moverocal therein, a member connectin ,ment of the lever, said piston-connecting member having spaced parts adapted to alternately engage said lever as the pistons approach their opposite limits of travel for initiating each oscillatory movement of said lever, a rock arm swingable across from one side to the o posite side ofthe lever mounting-by and dEiring movement of said pistonconnecting member, a spring havin its ends connected to the lever and to th arm at points spaced from their mountings whereby the ends of the spring will be moved to opposite sides of the lever mounting, said "arm .moving its end of the springlfirst and thereby tensioning said spring w erebythe same will act to complete each oscillatory movement of the lever after the lever movement has been initiated by said piston operated member."

8. Mechanism of the'character described,

29 of the lever, said piston-connecting member having spaced parts adapted to engage said lever as the pistons approach their opposite limits of tr vel for respectively initiating an oscillatory ovement of said lever, said spaced parts acting upon sa d lever during its idle movement, and means operable by' and during movement of pistons for accelerating the movement of said lever after it has been started, whereby the operative 30 movement of said lever will be comparative- 1y quick. J v 9. Mechanism ofthecharacter described, comprising a cylinder, spaced pistons reciprocal therein, a member connecting the pistons 3 for simultaneous movement, fluid conduits connected to the opposite ends of the cylinder, means for alternately applying suction to said conduits including a suction line, a valve for bringing said suction line alternately into commnication with said fluid conduits, a lever having a play connection with the valve for actuating the valve subsequent to a predetermined idle movement of the lever, said piston-connecting member having-spaced parts adapted to engage said lever as the pistons approach their opposite'limits of traved for initiating each rocking movement of said lever, said spaced arts acting upon said leverduring its idle m vement, a rock shaft, an arm fixed onthe shaft and rockable by and duringmovement of said piston-connecting member, and a spring connecting the arm to the lever at points spaced from their mountings and movable to opposite sides thereof by the combined action of said lever and arm.

10. Mechanism of the character described, comprising a cylinder, spaced pistons reciprocal therein, a' member connecting the pistons for simultaneous movement, a power-transmit ting rock shaft, an arm fixed on the shaft and os cillatableby said piston-connecting member'forrqcking the shaft, fluid conduits connected tothe opposite ends of the cylinder, a suction line, a valve operable to connect the suction line alternately to the fluid con:

duits, a lever for actuating said valve spaced lugs on the piston-connecting mem er for engagingthe valve lever as the pistons approach their limits of travel to thereby initiate the oscillatory movements of said valve lever, and a spring connected to the lever and arm and movable under tension by the latter to positions where said spring will expend its energy in completing the oscillatory moveends of the cylinder, a suction line, means for operatively connecting the suction line alternately to the fluid conduits inbluding a valve, a lever for actuating the same, a spring connecting the lever to the rock arm at" points spaced from their respective mountings whereby said spring will be arranged by sai rock arm to operate the valve lever after the movement of the latter has been initiated by a moving part of the mechanism, and means. carried by the piston-connecting member for engaging and imparting such initial movement to-the lever as the pistons approach each limit of travel whereby said prearranged spring will function. p

'12. Mechanism of the character described,

comprising a cylinder, spacedpistons therein,

a member connecting the pistons for. simultaneous movement, and means for operatively applying fluidlpressure to the pistons, said means including a valve a lever foractuating the valve, a spring connected at one end to the lever for swinging the same, means movably supporting the opposite end of the spring and operable by said piston-connecting member for moving said opposite end of the spring to position said spring in proximity to the pivot of said lever whereby the latter will ,still be held against movement, and means operable by said piston-connecting member as the lot pistons approach their respective limits of I movement fer moving said lever a distance suflicient to bring the spring across and beyond said lever pivot whereby said spring will quickly move the lever for actuating the valve. l c

13. A.- valve snap action for windshield cleaners comprising a movably mounted valve, a lever having connection therewith, a spring positioning member movable by a moving part of the windshield cleaner motor,

a spring connecting the positioning member to said lever and movable back-and forth be-,

tweentwo operative. positions at opposite" sides of the fulcrum of said lever for impart- J30 iiig to the latter a valve shifting movement, and means operable from a moving part of the 'motor for positively moving said lever subsequent to a prelimlnary positioning of said spring by said positioning member to slliipplement such preliminary positioning in e ecting a shift of said spring to the opposite side of the lever fulcrum.

14. A valve snap action for Windshield cleaners comprising a movably mounted valve, a lever having Connection therewith, a spring positioning member operable by a moving part of the windshield cleaner motor, a spring connecting the positioning member to said lever and movable back and forth between two operative positions at opposite sides of the fulcrum ofsaid lever for imparting to the latter a valve shifting movement,

and means operable from a moving part of the motor'for positively moving said lever subsequent to a preliminary positioning of said spring by said positioning member to supplement such preliminary positioning in I effecting a shift of said spring to the opposite side of the lever fulcrum, said means also positively moving said 'valve through said lever and upon failure of said spring to function when firstshifted to said opposite side of said lever fulcrum. a

15. The combination with an automobile windshield frame, of a fluid pressure motor comprising a cylindrical casing closed at both ends andhaving a central opening, a body member inserted in the casing opening and constituting the sole means of support for the casing from the windshield frame, the

opposite end portions of the casing being free from said frame, a piston in the casing, a rock shaft journaled in the body member and 0perable by the piston, valve mechanism on the body member for operatively admitting fluid pressure to the casing, and means for'operating the valve mechanism by and during movement of the piston.

16. The combination with an automobile windshield frame, of a fluid pressure cleaner motor mounted thereon, said motor comprising a casing, a piston therein, valve mechanism for operatively admitting fluid pressure to the casing, a rock shaft centrally arranged in the casing and operable by the piston, a casing-supporting body member in which said shaft is journaled, saidbody member centrally supporting the casing and constituting'the sole means of support therefor, the opposite end portions of the casing being unattached to the frame, and means for securing the body member to the windshield frame.

l7. A fluid pressure motor for windshield cleaners, comprising a cylindrical body, a block arranged intermediate the length of the body and dividing the latter into a pair of alined cylinders, a piston operable in each cylinder, said block having a valve seat on its inner face with ports opening therethrpugh from the cylinders and from a source of operating pressure, a wider operating shaft journaled in said block and terminating at its innenend within the cylinder body, said pistons being operatively connected to said shaft to rock the same, a valve within the cylinder body operating on the valve seat to operatively connect the ports thereof, and automatic mechanism for operating the valve, said mechanism including a part directly carried and operated by said shaft.

18. A fluid pressure motor for windshield cleaners, comprising a cylindrical body, a block arranged within the body and dividing the same into a pair of spaced cylinders, a piston operable in each cylinder, means operable by the piston across the inner face of said block, said inner face having a valve seat provided with a pressure supply port and spaced cylinder-ports, a valve operable on the seat to operatively connect the pressure supply port alternately to the cylinder ports, means for automatically actuating the valve, and a wiper operating shaft journaled solely in said block and operably connected by the first means to said pistons to be rocked thereby.

19. A fluid pIGSSUILG motor for windshield cleaners, comprising a cylindrical body, a block arranged within the body and dividing the same into a pair of spaced cylinders, a piston operable in each cylinder, means o'perable by the piston across the inner face of said block, a. wiper operating shaft journaled in said block, the latter constituting the sole means of support for said shaft, a member fixed on the inner end of the shaft and directly connected to said means to be operated thereby, said inner face having pressure supply and cylinder ports, and automatic valve mechanism for operatively connecting the ports, said mechanism embodying said member.

20. fiuid pressure motor for windshield cleaners, comprising a cylindrical body a supporting member for said body engaged with the same intermediate its ends, pistons operablein the opposite ends of said body, a wiper operating shaft journaledin said supporting member transversely of the body and between the pistons, a member fixed on the shaft within the body, means directly connecting the pistons to said member for operating the same, a valve seat ar'rangedon said supporting member and having a pressure supply port and spaced cylinder ports, a

valve operable on the valve seat, and autostanding ear, closures for the reinoteends of said tube, a central body portion having a portion adapted to be inserted insaid struckout portion of the cylinder and detachably engaged by said ear,-a rock shaft mounted in fluid inlet and exhaustpassages in said body,

ports from the respective fluid exhaust and fluid inlet and exhaust passages opening on the inner face of said body, avalve on said body for alternately connecting the fluid exhaust passage port with the respective fluid inlet and exhaust passage ports, a pair of spaced pistons connected-to move together in said tube, a part on said rock shaft adapted to be movedby said pistons hereby said rock 'shaft is oscillated as said pistons rcciprocate, a part connected to said valve and having a portion engaging a part of said pistons whereby said valve is operated from said pistons, said body, rock shaft and-valve:

being insertible and removable from the struck-out portion of said tube as a single unit, and a pair of removable fluid inlet and exhaust tubes extending from said inlet and exhaust passages in said body to theends of said tube. i

22. In a fluid pressure motor, the combina tion with an automobile windshield frame, of a body portion adapted to engage said frame and having parts for securement of said body portion to said frame, a cylinder having 'a recessed or cut out portion to receive a part of said body portion whereby said cylinder is maintained by said body portion on said frame, a rock shaft mounted in a bearing in said \body portion and projecting from said bod portion beyond said'cylinder, a portion of said rock shaft being positioned'in said cylinder, means for securing said cylinder on said body portion whereby said cylinder is supported on said windshield frame by said body portion, a valve'and valve mecha nism mounted on said body portion in said cylinder, a piston in said cylinder, and operable connections between said piston and said rock shaft and said piston and said valve mechanism whereby said rock shaft and said valve'me'chanism are operated by the movement of said piston, said body portion, rock shaft and valve and valve mechanism being,

removable as a single unit from said cylin p der. i

23 A fluid pressure motor comprising a cylinder, a piston construction in said cylinder, a piston rod connected to said piston construction and havingan angularly extend ing part, an oscillatory rod operablyconnected to said part and adapted to be connected to a windshield cleaner, a bearing in which said oscillatory rod is mounted, said oscillatory rodand bearing being in a valve block detachably mounted in said cylinder,

inder, each of said separate tubes bearing able from said tube as a single-unit.

and valve mechanism in said valve block for alternately exhausting-fluid/from the ends of'said cylinder for moving said piston construction in said cylinder.

24 In a fluid pressure motor .for 7 windshield cleaners, a tube having a centrally arranged opening and forming a pair of alined cylinder portions, end pieces on said tube closing the ends thereof, a pairof spaced pistons in said tube, one piston being in each 7 of said cylinder portions, a connecting member between said spaced pistons, a body member insertible in and removable from said tube opening and centrally disposed between said cylinder portions and connected to said tube, said body member extending into said tube so that the latter will overlie the former and be directly supported thereby, fluid passages in said body member, a pair of separate tubes extending lengthwise of said cylat one end ii i one. of said cylinder portions and atthe other end in said central bodymembcr for admitting fluid to or exhausting fluid from the ends of said cylinder portions, said connecting member having a part extending angularly relative to the path of 0peration of said connecting member, a rock shaft having a laterally extending part operably engaging said connecting member '5 part,said body member having a bearing in Which said rock shaft is mounted, said body being dctachably mounted in said cylinder,) and valve mechanism in said body for admitting or exhausting fluid said tubes 25. In a fluid pressure motor, the combination with'an automobile windshield frame inember, of a tube providing a-pair of cylinder portions, a central valve supporting block m 5 insert-ible in and removable from said tube, a rock, sliaft mounted in said valveblock, a motion transmitting member mounted on said rock shaft-to move said shaft, a pair of spaced pistons in said cylinders, operating connec- 1m tions between said pistons and said motion transmitting member, a valve on said valve supporting block in said tube for controlling .the admission of fluid to said cylinder por- 'taining said rock shaft in operative position with'respect to said windshield, frame, said valve block, rock shaft and motion transmit ting member being iusertible in and remov- 26/111 a fluid pressure motor, a metal tube providing a pair of alined cylinder portions, a pair of spaced pistons in said cylinder'pon tions, a block centrally disposed between said cylinder portions, and carrying a valve and 13a pressure through shield frame by said central body, a pair of valve actuating mechanism, a member (ion-' nectmg the piston, parts of sald valve actuating mechanism extending bet-ween said pis- '=tons to be operated by the movement thereof,

a power transmission arm arranged to be operated by said piston connecting member, a rock shaft operably connected to said arm and adapted to carry windshield wiper said rock shaft being carried by said block,

extending transversely to the axis of said piston and adapted to move a member to be operated by s id motor, a part on said rock shaft extendin into the path of travel of said piston, a part on said piston adapted to engage said rock shaft part to swing said roclz shaft, a central body having a portion insertible in a recess in said cylinder and providing a bearing for said rock shaft, said body portion having a part adapted to en gage a windshield frame, means for securing said body rigidly to said windshield frame whereby said rock shaft is maintained in operative position with respect to said windshield frame, and means detacliably securing said cylinder to said central body whereby said cylinder is supported adjacent the windspaced projections on an inner wall of said cylinder, a rigid part on said piston moitable between and engaging said spaced projections, whereby said piston is prevented from turning in said tube and said first piston part is maintained alined with said rock shaft, and means for admitting fluid pressure to said cylinder for causing said piston to reciprocate in said tube.

28. In a fluid pressure motor, a sheet metal tube constituting a pair of cylinders, a pair of spaced pistons in said cylinders and reciprocable therein, a sheet metal spacer member connecting said pistons and reciprocable therewith, said tube having on its inner wall a pair of projecting guide parts struck inwardlytherefrom upon opposite sides of a portion of said spacer to guide the latter *lengthwise whereby said pistons are prevented from rotating in said tube, and means for causing said pistons to reciprocate in said tube.

29. In a fluid pressure motor,a metal tube constituting a pair of cylinder portions and having a recess therein, a pair of spaced pi's tons in said cylinder portions and reciprocabld therein, a sheet metal spacer member connecting said pistons and reciprocabletherewith, a pair of integral spaced lugs on the inner walls of said tube struck out from the metal of said tube, a portion of said spacer being movable between said.lugs, whereby said spacer and pistons are prevented from turning in said tube, a central supporting member having means for rigid securement to a windshield frame of an automobile and having a part projecting into the recess in said metal tube, means connecting said metal tube adjacent said recess to said central meniber whereby said tube is supported adjacent the windshield by said central member and is prevented from turning with respectthcreto, fluid controlling valve and valve mechanisms on said central member in said tube, an operating shaft for a windshield wiper carried in bearings in said central member and being positioned by said central member with respect to the windshield frame and having a part projecting into said tube for operative connection with said pistons, and struck out parts on said spacer for operating said valve mechanism.

In testimony whereof I affix my signature.

ALVAH L. JUST.

CERTIFICATE or coanacrron.

PafliihtrNM-l-l,777,799. Granted October 1, 1930, m

'ALVAH L. wsr.

It is hereby certified that error appears in the printed specification of the above numbered. patent requiring correction as follows: Page 5, line 40, claim 9, for the misspelled word "commnication" read communication, and line 46, same claim, for "-traved" read travel; page 6, line 68, claim 17, for "wider" read wiper; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 9th day of December, A. D. 1930.

I r M. J. Moore, (Seal) Acting Commissioner of Patents.