US520166A - matthews - Google Patents

Description

(No Model.)

B. S. MATTHEWS.

2 Sheets-Sheet 1.

HYDRAULIC ELEVATOR.

1n! rumomu. umocRAPn-um com-A Pagtgente-d May 22, 1894.

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E. s. MATTHEWS. HYDRAULIC ELEVATOR,

2 Sheets-Sheet 2.

(No Model.)

lPatented May 272, 1894.

Witnesses Gmwm;

Inventor H WY. Sat.

Attorney vn: mman Lmcouumm com-mv.

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UNITED STATES PATENT OFFICE.

EDIVIN S. MATTHEWS, OF CINCINNATI, OHIO, ASSIGNOR OF lONE-HALF TO .I AMES L. HAVEN,

OF SAME PLACE.

HYDRAU LIC ELEVATOR.

SPECIFICATION forming part o f Letters Patent No. 520,166, dated May 22, 1894.

Application filed February 12, 1892. Serial lim/121,24?. (No model.)

@ZZ whom it may concern.-

Be it known that I, EDWIN S. MATTHEWS, of Cincinnati, Hamilton county, Ohio, have invented certain new and useful Improvements in Hydraulic Elevators, of which the following is a specification.

The term hydraulic elevator might, in its broad sense, be held to include the carto he elevated, the hydraulic machine to do the elevating, and the necessary adjuncts for their connection, but in the present case that term is used as referring to the hydraulic machine which does the work.

My improvements -will be readily understood from the following description, taken in connection with the accompanying drawings, in which Y Figure l, is a side elevation of a hydraulic elevator exemplifying my invention; Fig. 2, a plan thereof, with thehoisting-ropes, pilotvalve, cross head track and valve gear omitted; Fig. 3, a perspective view of the backcylinder head with its attached safety-stop return devices; Fig. 4, a perspective view of thefront cylinder head with safety-stop attached; Fig. a vertical transverse section of the safetystop; Fig. 6, a vertical longitudinal section of the front cylinder-head; Figf, a rear elevation of the front cylinder-head; and Fig. 8, a horizontal section of the bleed-valve.

Many, in fact most of the parts of this apparatus, are or may be of the construction usual in such machines and therefore no ex-A tended description will be given of suchparts further than is necessary for a comprehension of my present invention- A In the drawingszi-l, indicates the usual hydraulic cylinder, strapped to the foundation shoes and capable of endwise shifting as usual: 2, the front cylinder-head, secured as usual, to the cylinder: 3, the back `cylinderhead, this cylinder-head, as usual, not forming a complete closure forthe back end of the cylinder, as the machine is of a single acting type: 4, the usual piston-rods, extending backward from the piston of the machine to the crosshead: 5, the crosshead, provided with the usual track-wheels: 6, the usual crosshead-track: 7', the usual head sheaves, mounted on ashaftcarried in brackets formed upon the front cylinder-head, the number of sheaves depending of course upon the relation of travel desired between the piston of the machine and the elevator car: 8, the tailsheaves, similarly mounted on a shaft carried by the crosshead: 9, 'the hoisting-rope, with its tail end anchored to the machine, the rope passing thence rearwardly overa tail sheave and then forwardly and around a head sheave and so back and forth over all the sheaves and finally leading up or oi to the hoist Way, and if a multiplicity of hoisting-ropes are employed, as is usual, they will all follow the course ofthe single rope just referred to: 10, cable-guards extending across the sheaves and preventing the displacement ofthe ropes therefrom and having their ends secured in the usual spiders secured to the brackets `which carry the sheaveshafts,thesecablelguards consisting of rods with their ends projecting inwardly through bosses on ltheir supporting spiders, nuts being provided on the guards'insideand outside the spiders so that the guards maybe delicately adjusted to and from the sheaves and firmly securedV in adjusted position: 1l, the `main `valve structure, having no peculiarities 'so far as my present improvements are concerned, the

construction followed being substantially` such as is shown in my Patent No. 465,611 of 1891, the office of the main valve being, to' control the flow of water to and from the cylinder, the main valve structure, in the pres-V ent case, being disposed alongside of and parallel Wit-h the cylinder-of the machine and at about the. level ot its top: 12, the pilot-A valve, which maybe as shown in my former"l patentreferred to: 13, the valve-gear connecting the main valve with the pilot-valve and which vmay be as shown in my former patent: 14, the safety-stop valve, incorporated r within the main valve structure, and vvexem:e

plitiediu the present case asi a ported' valvco w surrounding and operating on ports iny .the

main valve cylinder, as clearly shown in Fig. 5, the oice of this safety-stop being. to automatically cut ol the dow of water to or'from the cylinderof the machine when the piston of the machine shall have reached either limit of its stroke, regardless of the position at that time occupied by the main valve: 15,- the stem of the safety-stop valve: 16, a yoke secured IOO to that stem and having vertical longitudinal slots extending through it from front to rear and from side to side: 17, a guide-pin rigidly supported in a bracket projecting from the safety-stop structure,this pin projecting horizontally through the side slots in the yoke 16 so as to form a guide for the vertical movements of the yoke: 18, a pin or roller mounted in the yoke, over and parallel with the guidepinr`17, the end journals of this roller being carried in vertical slots in the yoke so that the roller is capable of vertical adjustment in the yoke: 19, a cam-plate arranged for reciprocation in the fore and aft slots of the yoke, the plate being provided with a horizon tal slot which engages theguide-pin17,theupperedge of the plate being formed into two horizontal curved cams meeting at the center and engaging under the roller 18, whereby when the camplate is moved in either direction from the normal central position, the yoke will be raised and the stop-valve closed, the curve of the front cam being gentle so as to etect a gradual closure of the stop-valve, while the curve of the rear cam is comparatively abrupt so as to effect a quicker closure of the stop-valve: 20, a sliding-rod mounted in suitable guides and extending along parallel to the path of movement of the cross-head of the machine: 21, acollar on this rod to be engaged by a tappet on the crosshead when or just before the cros'she'ad reaches its rear limit of motion: 22, a similar collar to be engaged when the crosshead reaches its forward limit of motion:

23, a tappe't secured to the crosshead, to operate on these collars: 24, (Fig. 5) adjusting wedges arranged in the yoke 16 over the journals of the roller 1S and serving as means for the vertical adjustment of the roller inthe yoke: 25, a rod extending forward from camplate 19 into connection with the rod 20, the connection between the two rods, while not direct, as hereinafter specified, being positive sothat movement of rod 20, as eected by the crosshead tappe't, results in positive end- Wis'el movement of the cam-plate: 26, a bleedvalve'or cock arranged in the lower portion of the front end of the cylinder of thev machine, this valve or cock being of any ordinary or suitable construction, as exemplifiedA in Fig.8, and as will be later explained, the `oce of this bleed-valve being to remain normally closed but to automatically open at proper 'times and permit a leakage to take place from the cylinder of the machine: 27, the valve-rod of the bleed-valve, adj ustably connected with rod 20 so that when rod 2O is moved. by the crosshead at theback limit of the stroke of the machine, the bleed-valve will be opened at proper time and held open so long 'as the crosshead occupies its position of'back limit of stroke: 28,mechanism for automatically returning the safety-stop valve to its normal openposition when the crosshead shall have moved vin either direction from its position of limit of stroke, this mechanism being hereinafter termed the return device:

29, a shaft journaled in brackets formed with or mounted upon the upper portion of the back cylinder-head, one box at each side of the machine, this shaft forming the top shaft of the return device and extending endwise beyond that side of the machine on which the valve apparatus is mounted: 30, a similar shaft similarly mounted on the lower portion of the back cylinder-head and forming the lower shaft of the return device: 31, a lever fixed to shaft 29, just outside the box which supports the shaft, the lower end of this lever having connected to it the rod 20 so that any endwise movement of that rod, as etected by the crosshead tappet, results in a rocking of the shaft: 32, a weight, shown partially in dot-VV ted lines in Fig. 3 so as not to obscure the parts behind it, this weight having vertically slotted tails engaging the two shafts of the return device, so that the weight may move vertically and .be `guided in such movement by the shafts: 33, arms projecting horizontally from the upper tail of the weight: 34, l. lever fast on shaft 29 and engaging its ende under the arms 33 so that the tendency ofthe t;

gravity of' the weight is to hold the lever 33 in a normal horizontal position, and so that if shaft 29 and lever 34 be rocked, in either direction, the weight will be lifted and form a resistance to such rocking and yan agent v tending to return the shaft to normal position: 35, a lever xed upon shaft 29, ont wardly beyond the other parts secured to that shaft, the lever being adjustable in Ind out upon the projecting shaft, thelower end of this lever having connected to it thenod 25 of the cam-plate, the structure being the fore such that rods 20, and 25 and levers 3i; 31 and 35 all move togetherz. 36, (Fig. 2)'3 roller on the top shaft of the returndevies, t

to support the hoisting-ropes passing endwiee over kthe machine: 37, upward projections from the sides of the front cylinder-held, pierced for the reception ofthe tails of "the hoisting-ropes which are there anchored n the appropriate side of the machine: 38, ig. 2) the ,tail of the hoistingfrope thus anchored to one of these proj ections,it being understood of course that if a multiplicity of hoisting ropes are employed, their tails will be similarly anchored in this projection, the drawings showing the projections as pierced to receive the tails of four hoisting-ropes, the lmchoring being effected by a threaded shank on the hoisting-rope engaged by a nuten the front face of the projection of the cylinderhead: 39, the brackets projecting forwardly at each side of the front cylinder-head, to l'ey ceive the shaft of the head-sheaves ofv the machine, the .distance between these brackets being greater than that called for bythe number of head-sheaves employed by a degree represented by the thickness of one sheave, whereby the groupof sheaves may vbe shifted to one side or the other a distance corresponding to the width of a sheave: 40, the shaft of the head-sheaves, carried by the brackets 39: 41,'vertical holes in each of the brackets 39 and near the sheave-shaft: 42, a bolt, properly anchored in the foundation, and extending up through the appropriate one of the holes 4l and having a nut over the bracket, this bolt being disposed in that bracket which is subjected to the upward strain of the hoisting rope as it finally leaves the head-sheaves, f

the drawings assuming the hoisting-rope as starting, at 38, 0n the front side of the machine and passing in its several turns over the sheaves rearwardly until it finally passes up from the rear one of the head-sheaves: 43, the hoisting-rope thus finally leaving the headsheaves: 44, a loose collar on ,the head-sheave shaft, between the front bracket and the' front one of the head-sheaves, this collar serving to hold the group of sheaves'to the rear, and permitting the group to be similarly held against the front bracket by moving the collar to a position between the group of sheaves and the rear bracket, such change of position of collar and sheaves being effected when the situation of the machine is such as to call for a hoisting-rope finally leaving the headsheaves at the front of the machine instead of at the rear, in which case the tail 3S of the hoisting-rope would be anchored in the rear one of the projections 37 and, correspondingly,anchor bolt 42 would engage the front bracket instead ot the rear one: 45, the spiders, previously referred to, secured to the brackets and crosshead and serving for the support of the cable-guards 10: 46, a horizontal tube cast upon the forwardnpper portion of the front cylinder-head, the opening in this tube extending entirely through 'itz 47, a port in the cylinder-head, placing this tube in communicationwiththenpperfront portionof the cylinder ofthe machine; 48, a blind flange closing the rear end ofthe tube, that end of the tube oppositethe valve apparatus: 49, a flange on the main valve structure, specifically in the present case on the body of the stop-valve, uniting the valve structure to thev tube and furnishing the support for the valve vstructure, this connection therefore forming the sole support for the Valve'structure and the means of communication between the valve structure and the cylinder of the machine: 50, an inwardly open rectangular pocket formed at the center of thefrcnt cylinderhead, the body of this pocket projecting outwardly from the front face of the head: 5l, (Fig. 4) horizontal ribs on the front face of the front cylinder-head, extending from the body of the pocket 50 to the brackets 39, and serving to brace the brackets and pocket and cylinder-head and transmit strains between them: 52, rectangular spring-plates disposed within the pocket, with their ends restingy against shoulders in the upper and lower vwalls of the pocket: 53, a spring plate disposed against the inner face of the pile of plates within the pocket and extending endwise beyond those plates and having its extended ends secured to the inner face of the cylinder-head, there being one or more of these plates 53, which thus form additional spring plates for'the series, and also a keeper for the pile of plates within the pocket: 54, a central proj ection'on the front face of the piston of the machine, adapted to make -contact with the spring plates when the piston reaches its front limit of stroke: 55, (Fig. 8) alspring to hold the bleed-valve normally closed and permit that valve to be pulled open when the crossheadtappet moves rod 2O rearwardly, the bleedvalve, in the exemplication, being merelya piston workingin a ported cylinder: 56, connection placing the bleed-valve in communication with the lower front portion of the cylinder of the machine: 57, outlet from the bleed-valve, to be properly connected with a discharge-pipe to carry o the Water: and 58, an eye upon the yoke of the stop-valve to receive attachment from a weight or spring to serve in drawing the yoke down and opening the stop-valve.

.In the illustrations the hoisting-rope finally `leaves the head-sheaves at the rear, and all the valve apparatus is disposed at the front of the machine.v The arrangement of .the hoisting-rope may be reversed, as before explained, by shifting the tail anchor to therear projection and by shitting the collar 44 to the rear head-bracket, and anchor bolt 42- would then be located inv the -front head bracket where the upward strain of the hoisting-rope is imposed. `The valve apparatus kIOC may also be located at the rear ot therm'achine by transposing thevalve structure and blindflange 4 8, andlby reversingthe projections of the shafts of the return device. lA Normally,

the safety-stop valve is open, and the flow of water controlled entirely by the position of lthe mainvalve.` .When the machine reaches the backl limit of its stroke, corresponding to the top limit 0f the velevator' car, the attendant may have failedto have secured proper nos I I0 v control of the elevator by means of thevalves, in which case a shock would take place at the j top of the lift.' i But in thepresent case, when Y 'i 4this limitof stroke is approached, the crosshead-tappet will push rod 2O rearwardly andv the right hand portion of the cam-plate will cause the safety-stop valve toclose, thus practically severing the main cylinder from the main valve and bringing the machine to rest.

With a completely closed safety-stop valve in this condition, the main valve could not permit discharge from the vcylinder of the machine in order to start the car away from itstop j mit indow tothe cylinderof the machine and? thereby cause the limit of travel to befexceeded even'with the stop-valve thus closed.`

Compensation for such inflow is therefore' made by causihgithe bleed-valve to open and 1 permit the inflow due to incomplete closure to pass away. By the present arrangement each time the safety-stop is closed with the machine at its back limit of stroke, the bleedvalve opens the discharge from the extreme lower portion of the cylinder, thus permitting grit, dirt, dto., to discharge from the cylinder, the inlet of water to the cylinder being at its top and its bleed-valve discharging from the bottom, whereby an eiiicient washing action is produced. Vhen theV machine reaches its forward limit of stroke, corresponding with the lower limit of car travel, thestop-valve again closes automatically, but the bleed-V valve does not open, the bader arrangement of the spring plates preventing any further movement of the piston and this action of the limitation stop-valve may be made much sharper by making the appropriate cam-cu rve steeper. 1Thevwedges 24 serve in vertically adjusting the yoke with reference to the cam whereby the closed position of the stop-valve may be graduated to give the desired degree of inflow. After the stop-valve has been closed automatically, at eitherlimit of stroke, the weight of the return device will restore the valve to normal open position when the machine starts on its return from its position of limit of travel.

The inner plates 53 of the series of spring plates may be employed as a means for adjusting the forward limit of piston travel, by employing a greater orV less number of the keeper plates, thus providing for an accurate limit of stroke adjusted to suit the level of a lower car landing.

When the piston makes contact with the buffer-springs 53, the strain is brought centrally upon the piston, thus avoiding bending strains upon the piston-rods, and the forward strains of this contact on the front cylinderhead are met by the rearward strains of the hoisting-ropes on the head-sheaves, there being therefore no tendency to open the joint of the cylinder-head. The tube 46 of the front cylinder-head braces that head and all the strain parts connected with it. With a given size of main cylinder, the situation may call fora choice among several sizes of main valve structures, the result of which will be a possible variation in the horizontal distance between cam-plate 19 and the center of the machine, while the return device would remain constant in size regardless ofv change in size of main valve. The adjustment of lever 35 of the return device, in and out on its shaft, provides compensation for difference i-n main valve structures.

By inspecting Fig. 3 it will be seen that, when a given situation restricts side-room, weight 32 and lever 34 may be put at the other end of the shafts of the return-device, or 1ever 35 or 3l or both may be placed there either with them or alone, the system being quite elastic as to arrangement of parts.

lt will be noticed, from an inspection of Fig. l, that rearward movement of the crosshead when near back stroke limit, results in movement of the cam-plate and proper closure of the stop-valve, the opening of the bleed-valve taking place only whenV tappeti 59 7o engages collar GO, and that collar 60, being adjustable along its rod, permits of the adj ustment of the time of bleed-valve opening with reference to stop-valve closure. Y

As the car approaches its lower limit ofr travel it may be arrested with comparative suddenness bythe action of the cam-plate upon the safety-stop, this water arrest, it being understood, taking place independent of any arrest by the buffer, which acts later if 8o Q at all. Comparatively sharp arrests may this be made accurately at the lower landing.

the two operative inclines upon the cam-plato Y are diiferent, each beingas abrupt as is prac ticable, but that corresponding with the lo-wel landing being much the more abrupt of the two. And in arriving at the proper degrees of abruptness for the cams regard must be had for the individual conditions'under which the."V elevator is operating, speeds,distauce between.

lower landing and absolute lower limit or bufi L fer point of arrest, dsc. It is therefore almoetf impossible to plan the cams in advance, and

it becomes desirable to properly shape them.. after the elevator is put into operation. And

this is readily done in the construction seh forth, by simply dressing the operative om surfaces to produce the best practicable re i sults. This cannot be done where a slotted cam is'employed engaging above as well le below its roller or pin.

The cylinder is strapped to the foundation shoes in au ordinary manner and is capable of the usual endwise adjustment with refer ence to the foundation so as to secure the proper lead to the hoisting-ropes as they leave the sheaves. If anchor-bolt 42 were rigid or restrained below bracket 39, it would interfere with this endwise adjustment of the cylinder, but in the construction set forth, f' there is no interference the one with the other.

Heretofore anchor-bolts have, in cases, been extended from the brackets diagonally down#n i ward and anchored to some parts moving with the cylinder as it was adjusted with reference to the foundation. Such anchor-bolts would, of course, become merely the tension diagonals of the out-reaching brackets and would not at all properly meet the strains as in the present case. s

The cable-guards 10 are adjustable radially Al by means of the nuts upon their Shanks and they can therefore be adjusted with nicety Y down to the cables or sheaves. Heretofore paille-guards have been fixed in radial posiion.

By inspecting Fig. .1, it will be observed that cam-plate 19 is virtually a lever fulcrumed on pin 17 which supports it and that rod 25 is a prolongation of this lever attached to the lower end of rocking-arm 35. It will be obvious that as arm 35 swings in its are of motion the pivot which unites it to rod 25 will rise and fall to a degree corresponding with the versed sine of the are. The result is that cam-plate 19 becomes rocked upon the pin which supports it, and the effect offthis rocking is to raise and lower the portion acting upon the valve-stein. Indeed, if the camplate 19 were straight upon its upper surface instead of having the form of a cam, a certain degree of rising and falling motion would still be given to the valve-stem. And a further analysis of the movement will show that as arm 35 rocks to the left the distance becomes greater between the arm and the valvestem, and of course, also between the arm and the pin 17 on which the cam-plate rocks. Therefore, while the valve-stem will be given vertical motion as arm 35 rocks each side of the vertical, Vthe vertical motion given to the valve stem will be greater when arm 35 rocks to the right of the vertical than when it rocks to the left, and it will be observed that greater motion to the valve stem is given in correspondence with the lower landing, where quicker motion is wanted, this being the very reason for quickening the incline at the left of the cam.

I claim as my invention- 1. In a hydraulic elevator, the combination, substantially as set forth, of a safety-stop valve-stem, a fulcrum pin thereunder, a bar arranged to slide upon said fulcrum pin and engage upwardly upon said valve-stem, a swinging arm normally at right angles to said bar, a prolongation from said bar to a pivot carried by said swinging arm, and means for swinging said arm.

2. Ina hydraulic elevator, the combination, substantially as set forth, of a safety-stop valve-stem, a roller or pin carried thereby, a cam-plate having two dissimilarly-inclined gradually curved cams joining at a central depression and dissimilarly inclined immediately from said depression and engaged by said roller or pin, and connections between the cam-plate and piston-moved parts of the machine to move said cam-plate when those parts reach the limit of stroke the steeperineline of the cani-plate operating upon the stop valve at that end of the piston-stroke corresponding with the lower end of cartravel.

3. In a hydraulic elevator, the combination, substantially as set forth, of a safety-stop valve, connections from the piston-moved parts of the machine to properly close said valve when those parts reach a limit of stroke, a bleed-valve, connections from said pistonmcved parts to open said bleed-valve, andV vsubstantially as set forth, of a safety-stop valve-stem, a slotted guide-yoke thereon, a rigidly ,supported guide-pin engaging the guide slot of the yoke, a longitudinally slotted cam-plate engaging said guide-pin, a pin or roller carried by the yoke and engaging the cam, and connections between the camplate and piston-moved parts of the machine to movesaid cam-plate when those parts reach the limits of stroke.

6. In ahydraulic elevator, the combination, substantially as set forth, of a safety-stop valve-stem, a slotted yoke thereon, a rigidlysup ported guide-pin engaging said slot, a pin or roller carried by the yoke, a cam-plate engaging' said pi'n or roller, wedges in the yoke for adjusting the position of the pin or roller,

and connections between the cam-plate and piston-moved parts of the machine to move said cam-plate when those parts reach the limits of stroke.

7. In a hydraulic elevator, the combination, substantially as set forth, of a safety-stop valve-structure, a bracket and stem projecting therefrom, a guide-pin supported by said bracket, a yoke and operating cam mounted on said guide-pin, and connections between the cam-plate and piston-moved parts of the machine to move said cam-plate when those parts reach the limits of stroke.

8,. In a hydraulic elevator, the combination, substantially as set forth, of a cylinder-head having projections disposed at its front and rear upper edge and tted to receive the tail of thehoisting-rope, a group of head-sheaves for the hoisting-rope, two brackets 'arranged to support the shaft of said sheaves and disposed a distance apart a sheave-width in eX- cess of the widthof the group of sheaves, and a collar on the sheave-shaft at one side of the group of sheaves.

IOC

IZO

9. In a hydraulic elevator, the combination,

substantially as set forth, with a cylinderranged in the pocket to be engaged by said striking-point.

13. Inahydraulicelevator,the combination, substantially as' set forth, of a 'safety-stop valve, an upper and lower shaft, a Weight guided by said shafts and having arms, levers on one of said shafts and held in normal central position by said arms and weight, connections between said levers and safety-stop valve, and connections between said levers and the piston-moved parts of the machineto move said levers when said parts reach the limits of stroke.

14. In ahydraulic elevator, the combination, substantially as set forth, with a hydraulic cylinder, a safety-stop, anda safety-stopclosing device, of a pair of shaft-boxes carried by said cylinder at its top, a pair of shaftboxes carried by the cylinder at its bottom, the axes of said boxes being at right angles tothe axis of the cylinder, and shafts carried in said boxes and having their ends projecting for the support of said closing-device.

y EDWIN S. MATTHEWS.

XVitnesses:

J. W. SEE, JAS. FI'rToN.

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