USRE14815E

USRE14815E - Automatic revebser

Info

Publication number: USRE14815E
Authority: US
Publication date: 1920-03-09

Description

y HORN; 1 l mmm-Anc Huissen# 'j APPucATLoN man ocr.5. 1918.1- .l Relssued Mar'.-9,1920. `I r y l 14,8145'l oh 'ofzo VUNITED STATES `PATENT OFFICE.

JOHN HOI-RN, OF CLEVELAND, O-HIO.

AUTolrA'rIc nEvnnsEn.

remue nieu october r', 191e.v serial No. 257,384.

.To all 'whom it may conce/m:

" Be it known that I, JOHN HORN, a citizen of the-United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and use` ful Improvement in Automatic Reversers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

The present invention relates to mecha-l nism for periodically and automatically reversing a series of controlling devices, thus obviating'the necessity of hand control and overcoming the irregularities and uncertainties due to manual operation.

- Though not limitedto the kind of structure referred to, the mechanism is Well adapted for controlling a regenerativefurnace or similar structure, wherein mechanism automaticallyand intermittently reversesair and fuel valves Without relying lon 4the memory and activity of a human operator.

Open hearthfurnaces, melting furnaces, brick kilns and the like frequently require the reversal of fuel or air supplied and the positionof stack or flue valves. This has ordinarily been done. manually. For instance, in the operation of open hearth furnaces, it has been the custom for the attendant to reverse the valves about every fifteen minutes, but this interferes with the attention of the operator to the other operations of the furnace, and, furthermore, it relies on his watchfulness and memory in effecting the reversals at the proper time. There have ,been many instances where the attendant damaged the material being produced or seriously injured the furnace by delaying or forgetting to make the reversals at the proper time.

I have overcome the ,difficulties mentioned and have introduced a regularity not attainable by hand operation, by providing a series of actuators, each having a controlling device; a traveling member adapted to engage tht` successive controlling devices, and a time controlled device governing'the movement of the traveler. If it be desired to op-A the invention, as well as the more generic combination of cooperating elements above referred to, is comprehended Within the invention herein claimed. Accordingly the invention may be best summarized as cornprising the lcombination of coperating elements for producing a novel result, as well as thecombination and arrangement of parts lillustrated in the drawings and hereinafter more fully explained.l The essential characteristics .of my invention are summarized in the appended claims.

The drawings illustrate my invention embodied in a structure wherein the actuators Specification of Reissued Letters Patent. Reissued D131', 9, 1920, v original no. 1351352, dated February as, 191s, serial No. 170,910, med my 25, 1917. Application vvfmcontrol fluid pressure cylinders.l Figure 1 is a front elevation of suchembodiment, portions being broken away and they-electrical part of the apparatus being illustrated diagrammatically; Fig. 2 1s a diagrammatic view illustrating valves which the actuators may'o'perate; Fig. 3 isa fragmentary plan, illustrating some of the fluid pressure valves; Fig. 4 is a fragmentary detail illustrating a modification of the means for reciprocating the traveler. l

In the drawings, the numeral 1 designates a fuel supply pipe through which gas, oil or vother fuel is supplied to branch pipes leading to the opposite ends of the furnace, kiln, or the like. The branch pipes 2 are alternately opened and closed by means of suitable valves 3 and 4,' one valve being closed While the other is open, and the valves being reversed at intervals, to change the supply of fuel from one end of the furnace to the other. l

Between the valves 3 and 4 is ahorizontal row of vertical cylinders 5, 6, 7, 8 and 9, it being understood that any'suitable 'number of thesecylinders can be used, according to the circumstances. The upper ends of said cylinders have portions 10 bolted or otherwise fastened to a horizontal sup orting bar, or frame, l1 and the lower en s of said cylinders have heads 12. Pistons 13 arey slidable vertically within the cylinders and have depending piston rods 14 extending through `the heads 12. The piston rods 14 of the cylinders 5 and 6 canbe connected to the air valves at one end of the furnace, and

the piston rods of the cylinders 8 and 9 can' be connected to the ,air valves at the other end of the furnace, while the piston rod of the cylinder 7 lcan be connected Vto the flue or stack valves. The piston rods are connected by any suitable' operative connections with the valves or devices, and since the present invention does not concern said con- I nections or the common valves or devices to which the iston rods are connected, they need not be illustrated or described in detail. Stop screws are threaded downwardly throu h the upper ends of the cylinders and are a justable to limit the upward movealso having an exhaust port 22 o ening into the atmosphere. The p1pes21 o the

valves

15, 16, 17, 18 and 19 are connected to the.

lower portions of the respective cylinders 5, 6, 7, 8 and 9, while the pipe 21 o the valve 1 7 is connected to the upper portion of the intermediate cylinder 7. This cylinder`7 has the two valves 17 and 17', whereb theA piston of this cylinder is moved by uid pressure in both directions, while vthe pistons of the cylinders 5, 6, 8- and 9 are simply raised by fluid pressure, and moved downwardly by gravity, assisted by the movement ofthe devices to which the piston rods are con-f nected. f It is to be pressure cylinder operatin devices areemployed, 'the connections rom, the pistons may be made in any manner desired. Thepistons may be single acting (operating in one direction by pressure and in the other by gravity) as in the case of the cylinders 5, 6, 8 and 9, or the device may be double acting as in the case of the cylinder 7.

24 in Fig. 1 illustrates a series of actuators arranged in a horizontal row. In case the fluid pressure Aembodiment shown is employed, each actuatoris on the stem of a' valve as '3, 15, 16, 17, 17','

fluid controllin 18, 19 and 4. The members 24 accordingly close and open these valves as desired, each valve remaining in its given position until it is altered by the subsequent movement of its actuator. y

A nut 25 'travels upon a horizontal screw 26, arranged parallel with the series of actuators 'and journaled in suitable bearings 27, and has a tappet member 29 `which is preferably provided with a roller 30 for engaging the members 24, the roller 30 being movable into the jaw of the respectivemembers and after turning that member moving on out of engagement therewith and understood that-when the fluid- 'into ,engagement with the. `next member.

AThe nut is caused to reciprocate back and forth bythe rotation of the screw. If the thread of the screw extends only infone direction,'the directionof its rotation is periodically reversed to reverse the direction of travel of the nut. If the screw is of the right and left hand variety, as-shown in Fig. 4, a continuous rotation of the screw in one direction causes a reoiprocation of Aa suitable nut, as is well understood. Suitable means is provided for'rotating the screw as, for example, an electric mo- -tor 31: geared by atworm 51 and worm wheel 52 withythe screw shaft.' The motor is lauto- .maticalyvstopped at the end of each stroke ofthe traveling nut by switching mechanism operated by the nut, as hereinafter described it is restarted after a suitable interval of .time by any suitable time controlled mechanism.

' When the single thread screw of Fig. 1

is employed the motor is made reversible and rotatesin opposite directions after each stopping, the mechanism' switched by the nut not only opening the circuit but setting it for reverse reconnection by the time con- Fig. 4, the motor Will always revolve in one direction and is simply periodically stopped for the desired length o time.

.While some time controlled device acting periodically at predetermined intervals, is an important feature the invention is inde- This motor isshown in Fig. 1 as trolled device.` 'In the embodiment shown 1n l 10o V pendent of the .particularform of time controlled mechanism employed. y Any suitable device may be'employed for this purpose i which is operative to restart the movement 'of the traveler afte'ra predetermined period :of rest at each end of the stroke.

, I n Fig. 1, I have shown the timing device as clock mechanism 32 which may be assol ciated with an ordinary clock. 33 indicates a suitable arbor rotated bythe clock work which may have a revolution once every' hour or can be geared at an other desired speed. Mounted onthis ar r are shown 'metal disks 34 and3'4 insulated from each y other and each having diametrically opposed 4,projections 35-35 and 35"-35, the projections on one disk being shown as spaced'a quarter turn from those on the other. This providesv very readily for actuation of the motor every fifteen minutes if' the arbor 33 makes one rotation per hour. The projections 35 35 onthe disk 34 in the embodi- `ment shown operate to bridge a pair of contacts 37 and provide a circuit for the 'travel of the nut toward the left, while the contacts35 and 35 on the disk 34 contact with the terminals 36 and provide for movement of the traveler toward the right. Electric current is supplied'from any suitable source as indicated by the'generator 38.

The automatic stopping device `for-'the motor at each end of the stroke is shown as consisting of the electric switches 39 and 40 arranged to be engaged and operated by the nut when it reaches the respective 'ends of its movement, these switches being connected by a link 41 so that when either switch is opened the other becdmes automatically closed. In the circuit .arrangement shown, the contacts on the clock mechanism are of suflicient size so that after bridging the corresponding pair of terminals they remain in such contact at least until the traveling nut has reached the opposite end of the stroke. Tracing the circuits illustrated in Fig. 1,-

Ait will beseen that when the switch 39 is closed, this closes the circuit between conductors 42 and 43, the former being connected with one terminal of the generator 38 and with the contact 36, and the latter being' connected withone terminal of the motor 31. The switch 40 serves to close the circuit between'said terminal of the motor 3-1` and` a conductor 44, which'is connected tov one Contact 37 and to the` other terminal of the generator 38. The other members of the pairs of contacts36 and'37 are connected by a conductor 45 with theother terminal of the motor 31. The lines 43 and 45 lead to the field or armature of the motor 31, other` lines, as 48 and 49 lead from the source of current to the armature or field, as the case may be, independently of the clock and contacts. As shown the switches 39 and 40 are alternatelyo erated by the U-shaped bracket 46 carried y and depending from the nut 25.

With the parts arranged as illustrated in Fi 1 and 2, the nut 25 is at the left hand en of the screw 26 andthe member 46 has wlnch they are connected. The valves 17.

18 and 19 connect the upper portion of the .cylinder 7 and lower portions of the cylinders 8 and 9 with the orts opening into Y the atmosphere, where y the pistons of cyl- 'inde-rs 7 can move upwardly, whilethe pistons of cylinders 8 and 9 can n'iove downwardly.

Shortly after the nut comes into the posi- 'tion shown in Fig. 1 the contact 35 will cease to bridge the terminals 37; then after a suitable interval of time has elapsed since it came into that position, one of the switches or bridging members 3'5 will be brought by the 'clock into engagement with the contacts 36, to |bridge the gap therebetween. This closes a clrcuit including the generator 38, conductor 42, contacts 36, conductor 145, motor 31, ,switch 40and conductor 44, the switch '40 having previously closed when the switch 39 opened. The motor will now rotate the screw in the direction to cause the nut to travel toward the right. The member 29 is therefore carried under the members24 ,in succession, and in contacting with the right hand depending arms of said members 24 will swingl them toward the right, the leftfhand arms being,

swung downwardly to ydepending position.

This reverses the lvarious actuators 24 in vsuccesslon and in the embodiment shown reverses one by one. after the other the valves"` 3,' 15, 16 and 17 which were open, therefore 3, 15, 16, 17, 17, 1s, 19 and 4., The valves-1 85 become closed, and the valves 17', 18, 19 and 4 which were closed become open. v The valves 15, 16 Vand 17 accordinglyestablish communication between the lower Aportions of the cylinders 5, 6 and 7 and the atmosthev respective pistonsY to phere, "ermittin move ownwa y. Valve 17 establishes communication between the pipe 20 and upper portion of the cylinder 7, 'whereby the respective piston is forced downwardly by pressure fluid, while valves 18' andl 19 now` establish communication between the pipe 20 and lower portions of the cylinders 8 and 9, whereby their pistons are forcibly raised.` Valve 4 is 'openedfto reverse the flow of fuel to the other end of the furnace.A

' When lthe nut 25 reaches the 'end of its lolo movement to the right,l the member 46 opens' the switch 40, and closes the switch 39.

Switch 40 being opened will -open the cir-l. cuit above-described, thereby stopping the motor 31, after which the res ctlve switch' member 35 is' moved away tacts 36. l

Aftery another interval of time, the next oms-the oon-'1 Y switch member 35 engages the contacts 37,

as seen in Figfl, to close the circuit including the generator 38, conductor 42, -switch 39 which is now closed, conductor 43, motor 31, conductor 45, contacts 37 and conductor The motor 31 is therefore again rotated. This rotation will ybe in the same direction if the right and left hand screw structure of Fig. 4 is employed, .but inthe embodimentofy Fig. 1 it is in the opposite direction, as the reversed polarity of current supplied in Fig. 1 indicates.' This oppositeA rotation of the motor rotates the screw 26 in the opposite direction, thereby -moving the nut 25 to the left. In this movement the various actuators will be successively engaged and each reversed. In the embodiment shown, this will reverse the Various valves and bring them into the positie-n first described. When the nut 25 reaches the end' of its movement to the left, it o ens the switch 39 and .closes the switch 40, t e open- 1n .of the `switch 39 stopping themotor.

.t will-thereore'be seen that the nut 25,

when it starts from either direction travels continuously to; the other e dof its movement and then rests until t e timecontrol mchanism establishes an electric connection, vwhen the nut travels Ito the other end of its movement The speed of travel -Will of course depend on the speed of the motor and the' gearing and may be variedaecord ing to the rapidity with which itis desired --Ato operate the successive devices. The various devices are arranged in the order in which it is desired to have them operate; for instance, infcontrolling an Iopen health or 'naturalgas feed furnace, the valve 3 may 'control natural gas to one end of the furnace; the valves 15` and 16 the corresponding air supply; the valves 17 and17 the stack or Hue; the valves 18 and 19 air supply to the other end ofthe furnace, and

-nally the valve 4, the natural gas supply to cessively engage and move the actuating devices, vand meansfor controlling the reciprocat-lon. 1

. 2. In a .device of the character described,

the combination, of a ro'w of movable actuators, a reciprocating traveler having means for engaging and moving .the actuators, means for moving the traveler continuously from either end of its movement to the other, and means for automatically controlling the traveler at either end of its movement.

3. In a device of the character described, the combination of a series of movable actuators, a traveler adapted to successively engage such actuators, a screw for-operating the traveler. means for rotating the. screw, and means for controlling such rotation.

4. In a device of the character described, the combination of a row of independently movable actuators, a sore1 parallel with 'saidrow, a nut movable on said screw. means carried by the nut for engaging and moving the actuators as the nut travels, and means for rotating the sci-evs. i

5. In a device of the character described, the combinationof a series of movable actuators. a screvv. a nut movable on said screw. means carried by the nut for engaging and moving the actuators as the nut travels, means for rotating the screw in a manner to cause the nut to travel first in one direction and then in the other, and means con# trolling the rotation of the screvv.

G. -In a device of the character described,

the combination of a row of movable actuators, each adapted to turn about -an axis and having two projecting arms, a traveler adapted to engage one arm of each actuator in one direction of movement and move such traveler, means for guiding it parallel-with said row of actuators, said traveler having a `device adapted to successively enter the space betweenrthe pairs of arms and engageone arm andvt'hereby turn the -corresponding actuator,'and means for reciproeatingl` the traveler.

Y 8. lie combination of a series of actuators arranged in a ro1 and each adapted to turn on its axis and having two arms projecting. at an angle to each other, a

traveler guided parallel with said row and having a ta pet adapted to engage one o f such pair o arms of each actuator in one direction of the travel and the other arm of each pair in the other direction of travel, and means for reciprocating the traveler.

9. "The combination of a series of actu/ ators arranged in a row and each adapted to turn on its aixis and having two arms pro A jecting at an angle to each other, a traveler guided parallel with said row and having a tappet adapted to engage one of such pair of arms of each actuator in one direction of movement of the traveler and the other armofgeach pair in the other direction of movement, a. rotatable screw parallel with the guiding means, and a nut carried by the traveler engaging the screw.

10. The combination of 'a series of actuators arranged in a row and each adapted to Aturn `on its axis and having tvvo arms projecting at an angle. to each other, a traveler guidedparallel with said row and having a tappet adapted to engage one of such pair of arms of each actuator in one direction of movement of the traveler and the other arm of each pair in the other direction of movement` a rotatable screw, a nut carried b v the traveler engaging the screw, an electric motor for rotating the screw, switching mechanism operated 'by the traveler at each end of its movement for changing the electric connections to the motor, and a device for closing such connection.

1l. -In a device of the character described,

the combination ofa series of movable actu-v ators, a reciprocating traveler adapted to successively engage and move the various actuators, and means for reciprocating the traveler, and controlling devices engaged by ilo the traveler at either end of its movement i for stopping the operative .movement 'of the reciprocating means.,

12. In a device of the character described,

the combination of a series of actuators, a reciprocating traveler' adapted to successively engage and move the various actuators, means for reciprocating the traveler, controlling devices actin at either end of the movement for stopp1ng-thel operative movement of the reciprocating means, and

a device. for starting the operationl of the' reciprocating means. l 13. In a ldevice of the character described,

the combination of a row of actuators, a*

reciprocating device adapted to successively engage and operate tl'ie actuators, mecha.. nism includin an electric motor for reciprocating said a device for lclosingitheproper circuit to Start the motor, and electric switches con-v trolled by the travelerat either end of itsv i'eciprocation to open tlieucircuit and stop the motor. I

14. In a. device of the character described,.'

the combination of a series of actuators arranged in a row and each movable, a' pair of guide rods parallel with the row of actuators, a traveler mounted .on said guide rods and carrying means for engaging the actuators successively, and ,means between the guide rods for moving the traveler.

15. In a device of the character described,-

the combination of a series of actuators arranged 1n a row and each movable, a pair o'f gui e rods parallel with the row of actuators,v a traveler mounted on said guide rods and carrying means forl engaging the actuators successively, a nut carried by the traveler, and a screw between the guide rods and parallel therewith which said nut engages.

' 16. In a device of the character described, the combination of a series of actuators arranged in a row and each movable,'a lpairl of guide rods parallel with the rovi7 of acrods, and carrying means forengaging the actuators successively, a nt carried by the traveler, a screw between the guide rods and' lparallel therewith which said nut engages,

means for rotating the screw and mechanism engaged by the traveler at each end of' its the combination of atrow of independent actuators, a reciprocating traveler having erable by the traveler at evice, circuits for said motor,

`has a'cted vupon the various the traveler at eler, and meansfor rotating the screw.

19. In a device of the character described, the combination of a series of. movable actuators, a traveler adapted to .successively engage such actuators, a screw for moving .the traveler, an electric motor for rotat- .ing the screw, switches for the electric motor. and means for moving the switches opthefrespective ends of its movement. f I j p 20. In a device of the character described,

the combination of arow of movable actuators, a screw parallel with nut movable on said screw, the nut for engaging and tors as 'the nut travels, means for rotating the screw, andmeans operated by the traveler at each end of its movement for stopping the operation which drives the traveler.

21. Ina device of the character described,

`said row, a means carried by moving the actuathe combination of a row of movable actuators, a screw parallel withisaid row, a nut movable on said screw, means carried by the mrt for engaging and.moving the actuators -as the -nut^ travels, means for rotating the screw, and means for periodically starting the movement of the nut after it,

actuators.

22. In a device fof the character described, lt-he combination of a'row of movable actuators, veach adapted to turn about ai'i aXis and having two projecting arms, a traveler adapted to engage one arm of each actuator in one direction of movement and move such actuator, and engage the other arm of the respective actuators in the other direction of movement and return them to the irst position, a screw parallel with the actuators for reciprocating the traveler, and means for rotating the screw. tuators, a traveler mounted on said guide l 23, In a device of the character described, the combination, of a row of actuators, each movable about an axis and-providedwith a pair of arms at an angle to each other, a traveler, means for guiding it parallel With said.4 row of actuators, said traveler having a device adapted to successively enter the spaces between the pairs of arms, and engage one armand thereby turn the corresponding actuator, a screw for moving the screw, switches for'the electric motor, and means for moving the Switches operable by the respective ends of its movement. fp 24..The combination 'of a series of'actuators, arrangedpin a row and'each adapted 18. In a device of the character described,

to turn .on its axis and having two arms an electric motor-'for rotating the 4 projecting at an angle to. each other, a

traveler, guided parallelwith said row and having a tappet adapted to engage one of such pair of arms of each actuator inv one direction of movement of the travel and the other arm of each pair in the other direction of movement, -means for reciprocating the traveler, and means for periodically starting the movement of the traveler after it has acted upon the various actuators.

25. The combination of a series of actuators, arranged in a row and each adapted to turn on its axis and having two arms projecting at an angle toeach other, a trav- `eier guided parallel with said row and having a tappet adapted to engage one of such pair of arms of each actuator'i-n one direction of movement of the travel and the other arm ofv each pair in the other directionv of' `movemei it, a screw for moving the traveler,

an electric motor for rotating the screw,l

switches lfor the electric motor, andmeans for moving the switches operable by the traveler at the respective ends of its movement.

26. Ina device ofthe character described,

the combination of a series of actuators, a reciprocating. traveler, adapted to successively engage and move the variousactuators, and means for reciprocating the traveler, andcontrolling devices engaged by thetraveler at either end of its movement for stopping the operative movement of the reciprocating means, and means for periodically starting the movement of the traveler after it has acted upon the various actuators.

27. In a device of the character described, the combination of a series of actua-tors arranged in a row, and each movable, a pair of guide rods parallel 'with the row of actuators, a travelermounted on said guide Vrods and carrying means for engaging t-lie actuators successively, a nut carried by the traveler, a screw between the guide rods and parallel therewith, which said nut engages',

an electric motor for rotating the screw, switches for the electric motor, and means for moving'- thc switches -operable by the traveler at the respect-ive ends of its movenient. l

2S. In a device ot the character described,

the combination of movable actuating de-l vices, a traveler having means for successively engaging and moving the actuating devices, mechanism for reciprocating the traveler, val-ves controlled by the respective actuators, fluid pressure mechanism controlled by the valves. and n'ieclianisin for starting the movement ot' the traveler.

29. In a device of the character described,

the combination, of a row ot actuators, a rcciprocatingtraveler having means for engaging and moving the actuators, means for moving -the traveler continuously from either end of its movement to the other, and

means for automatically controlling a period of rest for the traveler at either end of its startin movement, valves controlled bythe respective actuators, fluid pressure mechanism controlled by the valves, and mechanism for starting the movement of the traveler.

30. In a device of the character described, the combination of a series of movable actuators, a traveler adapted to successively engage such actua-tors, a screw for'operating the traveler, means for rotatingthe screw, valves controlled by vthe` respective actuators, fluid pressure mechanism controlled by t-he valves, and mechanism for starting the movement of the traveler'` g 31. In a device of the character described,

the combination .of a .row of movable actuators, a screw parallel with said row, a.' nut movable on said screw, means carried by the nut for engagingand moving the actuators as the. nut travels, means for rotating .the screw, valves controlled'by the respective. actuators, fluid pressure mechanism controlled by the valves, and mechanism for starting the movement of the traveler.

,32. In a device of the character described, the combination of a row of movable' actuators, ascrew parallel with said row, a

nut movable on-said screw, means carried by the nut for vengaging and moving the actuators as the nut travels, and means for rotating the screw in a manner to cause the nut t-o travel first in one direction and then in the other, valves controlled by the respective actuators, fluid pressure mechanism controlled by the valves, and mechanism for starting the movement of the traveler;

33. In a device of the character described, the combination of a row of movable actuators, each adapted to turn about an axis and having two projecting a'rms, a traveler adapted to engage one arm of each actuator iii-one Adirection of movement and move such actuator and engage the other arm of the respective actuators in the other direction of movement and return them to the first position, a screw for moving the traveler, an electric motor for rotating the screw, switches for the electric motor, and means for moving the switches operableby the traveler at 'the respective ends of its move-l nient. v

34C.- In a device of the character described, the combination of a ro'w of actuators, each movable about `an axis and provided with a pair of arms at an angleto e'ach other, a traveler, 'means'for guiding it parallel with vsaid row of. actuators, said traveler vhaving a device adapted to successively enter the' space between the lpairs of arms, and engage one arm and thereby turn th'e correspondingactuator, valves controlled by the respective actuators, uid pressure. mechanism controlled by thevalves, Aand mechanism for the .movement of the traveler.

35. he combination -of a series' of actuators arranged in a row 'and each adapted to lite1 'tappet adapted to engage one turn on its axis and havingtwo arms projecting at an angle to each other, a traveler guided parallel with said row and having a of such pair of arms of each actuator in one direction of movement of the travel and the other arm 36. In an automatic reverser, in combination, a series of valves, a traveler mounted for -reciprocation .past the valves, a tappet on the traveler for successively operating the valves, mechanism for reciprocating the traveler, and means controlled by the trav- 'eler for. operating the Areciprocating mechanism.

37. An automatic reverser, comprisin a series of fluid pressure valves, a trave er reciprocable past-the valves, a tappet on the traveler for successively. operating the valves, means for reci rocating the traveler, a member extending iiom the traveler, and means controlled by the said member for operating the reciprocating means.

` duit 'a fluid 38. An automatic reverser, comprising a conduit, a series of flu1d pressure valves v1n the' conduit for controlling the fluid pressure.

supply, a screw actuated traveler reciprocable past the valves, a tappet on the traveler for successively operating the valves, and -I'neans controlled by the traveler for operating the screw. 39. An automatic reverser, series of cylinders, pistons a luid pressure supply conduit communicatin w1th the cylinders, valves in the conor controllm the fluid ly, a traveler reclprocable comprising a ast the cyliners, a tappet on the ltrave er for succes-v sively operating the valves, means for reciproc'atmg the traveler, a member depending from the traveler, and means controlled by the depending member for operating the reciprocating means.

40. An automatic reverser, series ofcylinders, pistons in the cylinders,

ressure supply conduit communicatin with the cylinders, valves 'in the 'conduit or controllm -the fluid pressure supply, a traveler reciprocable ast the cylinders, atappet on thetrave sively operating the valves, means for reciprocatmg the traveler, a member depending from the traveler, and'means controlled by the depending member for operating the reciprocating means.

41. An automatic reverser, comprising'a series of cylinders, pistons in the cylinders,

eating with the cylin rseries of cylinders,

.reciprocating mechanism,

traveler after'it has valves.

' eating ing the screw,

in the cylinders,

comprising aj ators, a traveler mounted on said l means carriedA thereby for engaging the er forV succes-'- duit for controlling the fluid pressure suppl a screw actuated traveler reciprocable past the valves, a tappet on the traveler Jfor successively operating the valves, and means controlled by the traveler for operating the screw.

42. An automatic reverser, .comprising a pistons in the cylinders, a fluid pressure supply. conduit communieating with the cylinders, valves in the conduit for controlling thelluid pressure sup-. ply, a traveler mounted for reciprocation before the cylinders, a tappet on the traveler for successively operating the valves, -mechanism for reciprocating the traveler, means controlled by the traveler for operating the and mea'ns for periodically starting vthe movement ofthe 4 3. An automatic reverser, series of cylinders, pistons .in a lluld comprising a pressure supply conduit communiwith the cylinders, valves in the conduit or controlling the fluid pressure supply, a traveler reciprocable beforethe cylind ers, a tappet on the 4traveler for success1vely operating the valves, a screw for movlng the traveler, an electric motor for rotatswitches for the electric motor, and means for moving the switches operable bythe traveler, at the respective ends of its movement.

4 4. An automatic reverser, comprising a sei-les of cylinders, pistons inthe cylinders, a 'luid pressure supply conduit communieating with the cylindersvalves in the conduit for controlling the fluid pressure supply, actuators therefor, a screw for Vmoving the traveler, an electric motor for rotating the screw, switches for theelectric motor, pressure supand means for moving the switches; operable by the traveler at the respective ends of its movement, and means for periodically starting theA movement of the traveler after it has acted upon the various actuators.

45. In a device of the combination of a series of actuators ar. ranged in a row an'd 'each movable, a pair of guide .rods parallel with the row of actu;

actuators successively, anut carried by the traveler, and a screw between the guide rods ,and parallel therewith whichrsalid nut engages, means for rotating the screw, and

valves controlled by the respective actuators, andjuid. pressure mechanism controlled by the valves, mechanism for Starting'the move#V ment Vof the traveler, and means for, automatically stopping thel movement of the traveler at-the end of a stroke.

46. The combination of a series of quarter turn valves arranged in a row., operating devices therefor mounted .on the stem of acted upon the variousA the character described,

the cylinders,

guide rods,

each valve and having two engageablemembers separated by a V-shaped space, a traveler mounted to move parallel with said row and adapted to engage and swing one of said members on each valve in one rection of travel and the other member on each valve in the opposite direction of travel,

a driving device for reciprocating the traveler, means device at each end of thev travel, and a device for starting the operation of the `driving device.

47. A series of actuators arranged in a row and each having two engageable members at an angle to each other, a traveler mounted to move parallel with said row andV adapted Vto engage and swing oner of said members of each actuator in one directi'on of travel and the other memb'er of each actuator in the opposite 'direction of travel, a driving device for reciprocating `the traveler, means for stoppingv the driving device at each end of the travel, and a de.- vice for starting the operation of the driving device.

48. A yseries'of actuators arranged in a' row and eaclifhavingl two engageable members at an angle to each other, a screw parallel with saidrow, a traveler having an en `@agement with the screw and adapted to engage and swing one of said members'oi` each'act'uator in one direction of travel and the other member of each actuator in the.

opposite direction of travel, means or rotating the screw 1n a manner to cause the traveler to reciprocate, means for stopping' the rotation of thescrew at each end of the travel. anda device |lor starting the rotation of the. screw.v y l 495A series of actuators arranged in a row and each having two engageablev` memf bers at an angle to each other, a screw parallel with said'row, a pair of guides Aparallel with the screw and respectively on opposite sides thereof, a traveler mounted on said guides 'and intermediately engaging the screw and adapted to engage and swing one of said members of each actuator in one direction'ofl travel 'and the other 'member of each actuator in the opposite direction -of travel, means -for rotating the screw in a manne.- to cause the traveler to reciprocate,

. means for stopping the rotation of the screw .guide and a at each end of the trav'el, anda device for starting the rotation of the screw.

50. A series of actuators arranged -in ra rou'v and leach having two engageable members at "an angle to each other, a guide parallel with said row, a traveler mounted on said roller adapted to engage and swing one of said members of each actuator in one direction of, travel and -the other member` of each actuator in the opposite direction of travel, means for causing the trayelerito reciprocate, means for stopping for stopping the driving means for rotating 1 the movement of the traveler' in each ,direction, and a device 'for starting themov'ement of the traveler.

5l. The combination 'of a, plurality ot'` movable actuators adapted to extend in the same direction, a plurality of 'mechanisms controlled by Said' actuators and being in mutually reversed condition when the actuators extend in thesame direction, a traveler adapted to successively engage the actuators, and means for operatingthe traveler, whereby th'e mechanisms are changed in condition while preserving'the'mutual reversed relationship between them.

52. yThe combination of a series-of valves,

Alnovable actuating devices therefor adapted to extend in' the same direction and con- 'nected'to the valves in such manner 4that some of the valves are open and others are closed when the actuators all extend in the same direction, a traveler adapted Ito successivel-y engage saidactuators and change the direction of all of them, whereby when the traveler is operated the valves which were open l become closed and the vvalves which werel closed become open.

53. The combination of a series of'valves, movable actuating devices therefor adapted to extend in the same direction and connectedto the valves in such manner that some of the valves are open and others are closed when the actuators all extend in the `same direction, a traveler adapted to successively engage said actuators and change.

the direction of all of them, mechanism for moving the traveler in either direction, mechanism for stopping the movement of the traveler in each direction, and .mechanism for restarting the movement ofl the.

traveler following each stoppage thereof.

54. The combination of a screw and nut, one of such members, a device for control ng such rotation, a traveler operated by the screw and nut, and a series of individually movable devices successively operated by the traveler.

55. The combination of a screw, means for rotating the screw', a device 'for starting such rotation, automatic means for stopping .Y

, the rotation, a traveler carrying a'nut engaging the screw, and mechanism operated by the traveler.

.56. The combination with a set of devices adapted to be operated., of mechanism for efectingsuch operation, a device for periodically and automatically starting the operation of said mechanism, and'intermedieration, whereby the mechanism has a period of rest between 'successive startings by the device.

t 57. The combination with'a set of devices adapted to beperated, of mechanism for eecting such operation, means for startin 'the operation of the mechanism mentionel vvately operating means' for stopping the opoperated periodically and means for stopping the mechanism immediately succeeding each complete operation thereof,' whereby the mechanism has aperiod of rest materiallv exceeding its period of operation.

58. he combination with aset of devices adapted to be the motor, whereby there is apperiod of rest between .successive startings.

59. The combination with a set of devices time, scrlew and a traveling nut, means for starting the rotation of such screw at comparatively distant intervals,

kthe nut, of rest. materially exceedlng its periodof operation.

Signed at Cleveland, Ohio, Sept. 20, 1918.

' JOHN HORN.