US1325222A

US1325222A - Truck

Info

Publication number: US1325222A
Authority: US
Publication date: 1919-12-16
Anticipated expiration: 1936-12-16

Description

E. WHALLEY.

TRUCK.

APPLICATION FILED MAY 10, I919.

Patented Dec.16,191 9.

3 SHEETS-SHEET 1- Min- IN V ENTOR.

WITNESS:

M Q @1661: ATTORNEY.

EL WHALLEY.

TRUCK.

APPLlCATION HLED MAY 10. I919.

Patepted Dec. 16, 1919.

3 SHEETS-SHEET 2.

' INVENTOR.

A TTORNE Y.

WITNESS: 4m

' E. WHALLEY.

TRUCK.

APPLICATION FILED MAY 10. 1919..

"1 25,222. Patented Dec. 16, 1919.

3 SHEETSSHEET 3.

WI TNESS IN VEN TOR.

A TTORNEY.

UNITED STATES PATENT ()FFICE.

ENOCH WHALLEY, OF WILLIMANSETT, MASSACHUSETTS,-ASSIGNOR TO HCLYOKE TRUCK COMPANY, OF HOLYOKE, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

TRUCK.

Specification of Letters Patent.

Patented Dec. 16, 1919.

To all whom it may concern:

Be it known that I, ENOOH lVHALLEY, a citizen of the United States of America, :1 nd a resident of lVillimansett, in the county of Hainpden and State of Massachusetts, have invented anew and useful Truck, of which the following is a specification.

My invention relates to improvements in trucks of the so-called elevating type, and resides in the new and novel construction and arrangement generally of the parts and members of which the truck is comprised, including certain peculiar mechanism by means of which the load is raised and lowcred, all as hereinafter set forth.

I The primary object of my invention is to produce a strong and durable, elevating truck, with which a very heavy load can, with comparative ease and absolute safety, be raised and lowered, and, while in raised or elevated position, be readily transported or carried from one point or location to another.

.Xno ther object is to provide such a truck with means whereby the load can be raised or lowered by the handle or tongue, regardless of the angle of the vertical plane in which said tongue moves, in the act of raising and lowering said load, relative to the central, longitudinal, vertical plane of the truck. This is an important advantage, because it frequently occurs that the operator needs to stand on one side or the other of the truck while operating the tongue to raise or lower the load, especially when the space in which he has to work is limited.

A furt-l'ier object is to provide elevating mechanism with which the operator has as complete control of the load while lowering the same as while raising it, and in which mechanism is incorporated an automatic lock that holds the load in normal raised the medium of the tongue.

The leverage in this truck is of such a character that the maximum amount of power is obtained with the expenditure of the minimum amount of force.

By furnishing two, slightly difierent, lever-blocks for the truck, I make provision for raising or lowering the load in either one or two operations, according to whichever of such blocks is used. It is easier to handle the load in two operations than in one, consequently the lever-block which permits this. to be done is preferably used when the load is very heavy. For a lighter load and when it is desired to perform the operations more expeditiously the other leverblock is employed.

Other objects and advantages will appear in the course of the following description.

-A preferred embodiment of my invention, whereby I attain the objects and secure the advantages of the same, is illustrated in the accompanying drawin s, and I will proceed to describe said invention with reference to said drawings, although it is to be understood that the form, construction, arrangement, etc., of the parts in various aspects are not material and may be modified without departure from the spirit of the invention.

In the drawings, in which similar numerals refer to similar parts throughout the several views, Figure l is a top plan of a truck whichembodies a preferred form of my invention as aforesaid, a portion of the platform head being broken off to disclose the parts below; Fig. 2. an enlarged, top plan of one of the twin-links at the front end of the truck; Fig. 3, a longitudinal, vertical section and partial side elevation, taken on lines 33, looking inthe direction of the associated arrow, in Fig. 1; Fig. 4, a detail, in front end elevation, of the two head members of the carriage and platform; Fig. 5, a side elevation of said truck, showing the platform raised, from the low or initial position which it occupies in Figs. 1 and 3, to the intermediate level, by the bi-level fulcrum block that is applied to this truck, the tongue being in section; Fig. 6, a side elevation of said truck, showing said platform raised to the highest elevation of rest, by said block; Fig. 7, a central, longitudinal, vertical section through the members at the forward end of the truck, the block and tongue being omitted; Fig. 8, an enlarged,

top plan of the rocker; Fig. 9, an enlarged rear elevation of the fulcrum-block; Fig. 10, an enlarged, side elevation of said rocker; Fig. 11, a side elevation, in partial section, of the forward end of the truck, showing the same equipped with a uni-level lever-block, the parts being in initial position. and the tongue omitted; Fig. 12, a similar elevation, but showing the platform members in elevated position; Fig. 13, an enlarged. front elevation of the uni-level lever-block, when the same is in initial or inoperative position. and, Fig. 14, a similar elevation of the bi-level lever-block.

.The foremost and major portion of the tongue is broken off in each of the views in which the tongue appears.

This truck, in common with other elevatingtrucks, comprises a lower sect-ion or carriage, which travels on the ground, and an upper section or platform upon which is directly received the load. These sections may have relative movement lengthwise,

when the upper section is raised and low-- ered, or either may be moved relative to the other while the latter remains stationary. Theoretically, and for the purpose of this description, it will be assumed that the car-' riage remains stationary and the platform is moved during the raising and lowering operations. In any event it must be the platform, of course. which is moved vertically or in a vertical plane.

The carriage comprises a frame and a swivel-block 1 respectively mounted on two pairs of wheels 2. The carriage frame consists of a vcentrally slotted, horizontal plate 4. through which adjacent to the rear end extends transversely an axle 5 for the rear wheels 2, and has rearwardly-extending lugs 66, and an upwardlyand forwardlyextending head 7 at the front end. T he head '7 has a flat, horizontal extension 8 at the top, which rests on the swivel-block 1. On each end of the head 7 is a cam-lug 9 the under and forward edge of which forms a curved cam surface, and extending; from and beyond said head at each end below said cam-lug is a lug 10. A rock-shaft 11 extends through and is journaled in the head 7, transversely of the carriage and parallel and on the same plane with the axle said shaft 11 projecting beyond the ends of said head. The head '7 is cut out to accommodate the swivel-block 1. as represented at 12 in Figs. 4: and 7.

The swivel-block 1 has an axle 13 upon which are mounted the two front wheels 2. A post 14 rises from the center of the swivelblock 1. such post in this case being screwed into said block and secured with a pin 15, as shown in Fig. 3, wherein a portion of the front wheel 2 therein appearing is broken off to expose such pin, as in Fig. 7 The post 14; passes through and rotates in the extension 8, and there is a nut 16 on said post above said extension. The nut 16 prevents the extension 8 from being lifted away from the swivel-block 1, without binding on said extension. The post 14 has a laterally-extending head 17 at the top. The swivel-block with the post 14. is capable of describing a. complete circle, so that said block can be positioned to guide the carriage in any direction. The post head 17 should be positioned by the swivel-block 1 so that it has a rearward direction relative to the front by location of said block.

The platform comprises a frame which consists of horizontal, parallel sidepieces 18-18 connected adjacent to the rear ends by a crosspiece 19, and at their front ends by a raised head20. A rock-shaft 21 is journaled in the side-pieces 18, back of and above the axle 5, and a similar rock-shaft 22 is journaled in the ends of thehead 20, said second-mentioned shaft being parallel and on the same level with said firstnamed shaft. When the platform. is down in low or initial position, theside-pieces 18 are supported on the terminals of the axle 5, which terminals extend outwardly beyond the rear wheels 2, and the head 20 is supported by the rock-shaft 22 on the plate 4. The top of the head 20 is about on a level with the top of the head 7 and extension .8, when the platform is in the aforesaid low position. The front of the head 20 is cut out in the center, as shown at 23 in Figs. 1 and 7. to afford clearance for parts of the head 7 when the platform is advanced.

As lifters for the platform I employ. in this case, double or compound links of. peculiar construction, and which are designated by the

numerals

24, and and 26, There are four of the links 24, and two each of the links 25 and Generally and except in certain points of construct-ion, the links 26 are like the. links Each link 26 is a twin-link and has a pivot 27 extending between the free ends of the two arms of such link. Each link 2%. is a sector having an arcuate edge that is designed to bear on a member in front, when the platform is actuated. as will presently be explained. Two of the links or sectors 24: are mounted at their rear or upper ends on the rockshaft 21, and two more of such links are mounted at their rear or upper ends on the rock-shaft 22. The links 25 are mounted at their forward ends on the axle 5, and the twin-links 26 are mounted at their forward ends, which are closed, on the rockshaft 11. A rod 28 pivotally connects adjacent ends of the rear sectors 24; and the links 25, and the two pivots 27 connect adjacent ends of the front sectors 2 1 and twin.- links 26. The rod 28 and the pivots 27 pass through the sectors 24 adjacent to their lower, rear corners, when said sectors are in initial position, so as to leave a sufficient amount of their arcuate edges to fulcrum properly on the axle and the rock-shaft 11 to the extent necessary for the purpose of elevating the platform. The twin-links 26 have projections 29 at their front ends, which extend beneath the lugs 9. Initially and during the first half, approximately, of the ascent of the platform and the last half, approximately, of the descent of said platform, the rod 28 rests on the lugs 5, and the projections 29 bear against the undersides of the lugs 10. The links 25 and the twin-links 26 are positioned horizontally by their stop members 6 and 10.

If desired the sectors 24 may be bolted or otherwise secured to their rock-

shafts

21 and 22, the links 25 to the axle, and the twin-links 26 to the roclcshaft 11, also the pivots 27 to said twin links. The rear wheels 2 are loose on the axle 5.

When the platform is drawn forward, the first effect produced is to rock the sectors 24- upwardly on the rod 28 and the pivots 27, which action raises said platform. The lugs 6 and receive the thrusts from the rod 28 and the twin-links 26 imparted to them by the sectors which fulcrum on said rod and the sectors which fulcrum on the pivots 27, respectively, the latter being in the rear terminals of said twin-links. The arcuate edges of the sectors 24 are initially out of contact with the axle 5 and the rockshaft 11, but, as the sectors 24 continue to rock upwardly, such edges come into contact with said axle and shaft and fulcrum thereon, and the links and the twin-links 26 are then caused to rock upwardly on or with said axle and rock-shaft, respectively, being .earried up by said sectors, until the platform arrives at its highest elevation.

In descending the links 25 and twin-links 26 rock downward as far the lungs 6 and 10 permit, the sectors 24 rocking at the same time on the axle 5 and the rock-shaft l1, and then said sectors complete their downwardly rocking movement, fulcruming on the rod 28 which is at rest on said lugs 6, and on the pivots 27 which are held on the same level with said rod, by said twinlinks and said lugs 10.

Provision is thus made for moving the load more slowly during approximately the first half of its ascent, than during the remaining portion thereof, and, likewise, for permitting said load to descend more slowly during the latter part of its descent than during the first part thereof, so that the expenditure of less power is required for starting the load upwardly and better con trol of the load is obtained when the latter descends.

I will now describe themechanism for drawing the platform forward to elevate'it on the compound links previously described, and for controlling said platform when the same descends on said links.

Journaled behind the post 14 in uprights 30-30 which rise from the extension 8 is a rock-shaft 31, and mounted on this rockshaft is a rocker 32. Said rocker consists of angular arms having segmental-gears 3333 each side of the central, longitudinal, vertical plane thereof, and a central tail-piece 34. The segmental-gears 33 are on the front edges of the upstanding portions of the arms of the rocker 32, and are concentric with the rock-shaft 31. The tail-piece 34 extends rearwardly from the approximately horizontal portions of the arms of the rocker. The tail-piece 34 is connected by a twin-link 35 with the platform head 20, the forward end of said link being pivoted at 36 to the rear end of said tail-piece, and the rear end of said link being pivoted at 37 to a lug 38 on said head.

Upon rocking the rocker 32 on the rock shaft 31 upwardly at the rear end, the platform is drawn forward through the medium of the link 35 which connects the tail-piece 34 with the lug 38 on the platform head 20.

The platform head 20 is guided in its forward and backward movements by the carriage head. 7, and prevented from being i tilted upwardly, when advancing, or by reason of any excess of load on the rear end of the platform, by means of lugs 3939 and the cam-lugs 9. The lugs 39 are at the front of the head 20, at the bottom, and extend inwardly beneath the cam-lugs 9, as clearly shown in Fig. 4. The lugs 39 are always in contact with the curved edges of the eam-lugs 9, the shape of said cam-lugs being such as to hold the head 20 to its course when advancing and ascending and moving rearwardly and descending.

Loosely mounted on the post 14 is a cylindrical fulcrum-block 40 having a fiat table 41 on top, and provided behind with a pair of racks 42 which intermesh with the segmental-gears 33. Normally the fulcrunr block 40 is held some distance above the nut 16 by the racks 42, the lower portions of such racks then being in engagement with the lower portions of the segmentalgears 33.

Upon thrusting the fulcrum-block 40 downward, the rocker 32 is caused to draw forward the platform, said rocker being then actuated by the intermeshing teeth of the racks 42 and segmental-gears 33 to swing upward the tail-piece 34. When the platform moves rearwardly and downwardly, the downwardly swinging tail piece 34, through the medium of the toothed members, again raises the fulcrum-block 40.

The fulcrum-block 40 can move freely up and down on the post 14, and the latter can turn freely in the former. And there is al- CIY ways sufficient clear space under said blocx to enable the same to operate freely.

As the means for imparting the downward thrust to the fulcrum-block 40, which causes the platform to be advanced and raised, and for controlling the rise of said block and of the consequent descent of said platform, a unior single-level lever-block, such as that shown in Figs. 11, 12, and 13, or a bior double-level lever-block, such as that illustrated in Figs. 1, 3, 5, 6, and l-l, may be provided. The double-level lever-block will first be described.

This lever-block consists of a hollow body 4-5 mounted on two pairs of wheels l l, and having a pair of lugs l5 and a single lug H3. The body l3 fits over the top of the post H, and is pivotally attached thereto by means of a pin 9:? that passes through the sides of said body and transversely through the post head 17. The wheels l'l are mounted on trunnions 48 that project from the sides of the body 43, said trunnions on one side being adjacent to one edge of such side, and said trunnions on the other side being adjacent to the edge of said last-named side that corresponds with said first-named edge. T he wheels hare hubs 4Y9, Fig. 14;, which space said wheels from the adjacent sides of the body The lugs are on edges of the sides of the body 48 which are approximately at right-angles to the edges adjacent to which the wheels ll are located, and the lug alt extends across said body from side to side, in a plane approximately common to the pin l7 and the transverse center of the space between the two pairs of wheels is, and parallel with said pin and the trunnions e8.

The single-level lever-block consists of a hollow body 50 provided with. two trunnions l3 and one pair of wneels 44:, and having a single foot 51, a pair of feet 52, and a single lug These wheels have the hubs 49 for the same purpose as do the other wheels all. The trunnions l-S and the feet 52 are adjacent to the corners at one end of the body 50, and the lug 53 at the opposite end of said body, while the foot 51 is adjacent but at right-angles to said lug, and directed forward or downward, according to the position of the body. The body 50 is mounted on the post let and attached by the pin 47 to the head 17 in a similar manner as is the body In each case the pin l7 passes through the approximate center of the said body.

In practice the wheels ail of either leverblock bear on the table l1, so also do the lugs of the block d3, and the foot 51 of the body 50, while initially the edges of said block 43 which are diametrically opposite to said lugs l5 rest on said table, and so also, do the feet of said block 50.

A handle or tongue 54: is provided for operating either lever-block and for propelling the truck. This tongue is bifurcated at its inner end to receive and embrace the sides ofsuch block, and is connected by the pin 47 with the post head 17. A longitndi nal slot 55is made in each arm 56 of the forked part of the tongue 54: to receive the pin 4-7 and permit said tongue to be moved lengthwise, as well as to be rocked, thereon. Each of the arms-56 also has an offset part and a. slot 57. The arms are adapted to enter between the body and wheels of the associated lever-block, by reason of the long hubs l9, and this enables the tongue to be swung down to a greater extent than would otherwise be possible. The-slots 57 are de signed to receive the hubs 4:9 and thus enable the tongue to be swung down still farther, or to the extent necessary for hauling or propelling the truck.

In the crotch of the fork of the tongue is a slot 58, best shown in Fig. 5, which is adapted to receive any of the lever-block lugs, said tongue being rocked on the pin l? and drawn forward or upward thereon to the extent required to enable said slot to receive the lug or lugs. lVhen the slotted part of the tongue is in engage ment with :1. lug or lugs, said tongue is so adjusted that the pin i7 is in the inner ends of the slots 55, and this is the position of the parts during the raising and lowering operations. But when the tongue is used for drawing the truck about, it is so adjusted that the pin 47 is inthe outer ends of the slots 55. In backing the truck the first position is, of course, assumed by the tongue.

The tongue 54: is of suitable length, and with it great power is exerted, through whichever lever-block may be in use, on the lever-block d0 to operate the parts to raise the load, on the one'hand, and complete control of the load in descending is maintained on the other hand, in the manner presently to be explained.

In drawing the truck about and backing it by means of the tongue 5i, steering is effected by moving said tongue to the right or left and so partially rotating the post ll and turning the swivel-block l, which is done without interference on the part of the fulcrum-block 40 and engaging rocker 32, the le er-block at this time riding freely on the table all and moving with said tongue and post, and said swivel-block turning beneath the extension 8. In Figs. 1 and 3 the tongue is in position to back the truck. ll hen the tongue is drawn forward into the position shown in Figs. 5 and 6, it can be swung over the lugs 45 and 46, and this is the position of said tongue when the truck is drawn forward thereby.

Having described the construction of the truck, I will next explain the complete operation of the same, assuming, first, that the double-level lever-block is in position.

To elevate the platform with its load, first draw the tongue 54 forward from its position in Figs. 1 and 3, as far as the pin 4'? permits, then swing said tongue upward over the lugs 45, and permit it to descend and interlock with said lugs. At this time the body is resting with one pair of wheels 44 and adjacent edge portions of said body behind said wheels on the table 41, the lugs 45 projecting upwardly and the other pair of wheels 44 being over the first pair. Now force the tongue forwardly and downwardly, and thus rock the body 43 forward on the wheels 44 which are on the table 41, until all of the wheels 44 are on said table see Fig. 5. This action forces downward the fulcrum-block 40, due to the relative position of and the distance between the pin 47 and the axis of the first pair of wheels, and draws forward the platform, through the medium of the rocker 32 and link 35, and said platform is carried upwardly on and by the compound links. The platform is now on the first level and locked by the lever-block, since the upward thrust imparted by the load, through the link 34, rocker 32, and fulcrum-block 40, is received by the wheels 44 on opposite sides ofthe vertical plane or the center of gravity of the pin 47.

The distance between the pin 47 and the line of contact of either the front or the back pair of wheels 44 with the table 41 being greater than the distance from said pin to said table vertically, the tilting of the lever-block in either direction must raise the load, wherefore, if said block be tilted backward to permit said load to descend, the latter is first unlocked by being raised a little higher. As soon as the axis of the rear wheels 44 pass forward of the .ver tical plane of the pin 47 the load begins to descend. I

Naturally it is understood that the post 14 fixes the unvarying elevation of the pin 47.

Returning to the explanation in regard to the elevating operation, and to Fig. 5, it-is to be observed that the tongue 54 is next disengaged from the lugs 45 and'engaged with the lug 46, and then again forced forward and downward to rock he body'43on the front wheels 44 and over until the lugs 45 come to rest on the table 41, as shown in Fig. 6. This action onthe part of the leverblock thrusts downward or depresses the fulcrum-block 40 still more, because the distance between the pin 47 and the line of contact of the aforesaid front wheels 44 with the table 41 is greater than the distance between said pin and the line of contact of the other pair of wheels 44 withsaid table, rea..

1 again to Fig. 5 in applying this' exwith planation. The further downward move ment of the fulcrum-block 40 tilts the rear end of the rocker 32 still higher, and so draws the platform farther forward, with theresult that said platform is elevated to a greater height on and by the compound links. The platform with its load is now at the second level, and the truck is ready to be propelled to the locality where the load is to be deposited.

The platform is again locked by the leverblock, inasmuch as the upward thrust of the fulcrum-block 40 is on the wheels 44, that are bearing on the table 41 at this time, and the lugs 45, while the vertical plane of the pin 47 is between said wheels and lugs. In tilting the lever-block backward to permit the load to be lowered, said load is'necessarily elevated a little more before it can descend, just as was the case at the first level, and herein is found again the locking factor.

By thus locking the load and doing so automatically, which is the fact, at each elevation, there is no danger to the operator when he shifts the tongue in raising or lowering the load, or at any time while said lead is at rest in elevated position.

With the platform at the second level the carriage is propelled by the tongue 54 to the place where the load is to be'deposited. There the tongue is engaged with the lug 46 and the body 43 tilted backward to unlock the parts, when the platform moves rearwardly anddownwardly from. the second to the first level, or until said body is in the Fig. 5- position. At this point the platform is checked by the lever-block, and can not resume its rearward and downward travel until the operator disengages the tongue from the lug 46, engages it with the lugs 45, and again rocks the body back to unlock the parts. Theplatform now resumes and continues its travel until it arrives in initial position once again. During the descent from the second to the first level and from intervening mechanism.

The operation of the single-level leverblock shown in Figs. 11, 12, and 13 is very similar to that of the other lever-block, except that with the single lever-block the load israised to its high position in one opera- 'tion. and lowered to initial position in single operation. Initially the body50 rests its wheels 4%; and feet 52 on the table pointingupwardly. and the foot 51' directed forwardly, as represented other case, although omitted from the The tongue 54 is used in this as The load is raised byrocking the body 50 from the position shown in Fig. 11 to that shown in Fig. 12. This is done after engaging the tongue with the lug; 53. The body 50 now rests with its ,wheels 5H and foot 51 on the table a1, and the load is locked in substantially the same way as before inasmuch as the vertical plane of the pin L7 is between said wheels and foot. Before the load can descend it must be raiseda little higher, as in the other case and for asimifact that rotatively the post let and a-ttached parts and members are independent ofthe fulcrum-block 40, rocker 32 and other nonrotary parts and members. This is an important and valuable feature, as hereinbefore stated.

What I claim as my invention, anddesire to secure by Letters Patent, is-

1. In a truck, ofthe classdescribed, upper and under sections, a post at the front end of the under section, means to elevate said upper section on said under section, when the former is moved forward on the latter, means to move said upper section forward on said under section, such means consisting in part of a member arranged to slide up and down on said post, and means to impart a downward thrust to said member.

2. In a truck, of the class described, upper and under sections, a post at the front end of the under section, means to elevate said upper section on said under section, when the former is moved forward on the latter, means to move said upper section forward on said under section, such means consisting in part of a member arranged to slide up and down on said post, a tongue, and means operated by said tongue to impart a downward thrust to said member.

3. In a. truck, of the class described, upper and under sections, a post at the front end ofthe under section, means to elevate said upper section on said under section, when the former is moved forward on the latter, means to move said upper section forward on said under section, such means con sisting in part of a member arranged to slide up and down on said post, a tongue adapted to be swung in vertical and horizontal planes, and to propel the truck, and means operated by said tongue to impart a downward thrust to said member.

I. In a truck, of the class described, upper and under sections, a post at the front end of the under section, means to elevate said upper section on said under section, when the former is moved forward on the latter,

nea-ns to move said upper section forward on said under section, such means consisting in part of a member arranged to slide up and down on said post, a tongue, and means operated and controlled by said tongue to impart a downward thrust to and to control the upwardmovement of said member.

5. In a truck, of the class described, up per and under sections, a post at the front end of the under section, means to elevate said upper section on said under section, when the former is moved forward on the latter, meansto move said upper section forward on said under section, such means con- SISlJiIIg in part of a member arranged to slide up and down on said post, a tongue adapted to be swung in vertical and horizontal planes,

up and down on said post, a tongue, and .means operated .by said tongue to lmpart, a

downward thrust to said member in a plurality of separate and distinct operations.

7. In a truck, of the class described, up-

per and under sections, a post at the front .endof the under section, means to elevate said upper section on said under section,

when the former is moved fm'ward on the latter, means to move said upper section forward on said under section, such means consistmg n part of a member arranged to slide up and down on said post, a tongue adapt ed to be swung in vertical and horizontal planes, and to propel the truck and means operated by said tongue to iu'ipart a downward ,t-hrust to said member in a plurality of separate and distinct operations.

8. In atruck, of the class described, upper and under sections, a post at the front end ,of the under sectlon, means to elevate said upper section on said under section, when the former is moved forward on the latter,

means to move said upper section forward on said under sect on, such means consisting in part of a member arranged to slide up and down on said post, a tongue, and means operated and controlled by said tongue to impart a downward thrust to said member in a plurality of separate and distinct op- ,erations, and to control the upward movement of said member in a plurality of separate and distinct operations.

9. In a truck, of the class de cribed, upper and under sections, a post at the front end of the under section, means to elevate said upper section on said under section, when the former is moved forward on the latter, means to move said upper section forward on said under section, such means consisting in part of a member arranged to slide up and down on said post, and means to impart a downward thrust to said member, said last-named means being provided with means automatically to lock the load in raised position.

10. In a truck, of the class described, upper and under sections, a post at the front end of the under section, means to elevate said upper section on said under section, when the former is moved forward on the latter, means to move said upper section forward on said under section, such means consisting in part of a member arranged to slide up and down on said post, a tongue, and means operated by said tongue to impart a downward thrust to said member, said lastnamed means being provided with means antomatically to lock the load in raised position.

11. In a truck, of the class described, a carriage having at the front end a swivel member with a post, a platform mounted on said carriage, means to elevate said platform on said carriage, when the former is moved forward on the latter, means to move said platform forward on said carriage, such means comprising a rocking member carried by said carriage, and a link connecting said rocking member with said platform, avertically-movable member on said post and in operative engagement with said rocking member, and means to thrust said verti-- (ally-movable member downwardly.

12. In a truck. of the class described, a

carriage having at the front end a swivel member with a post, a platform mounted on said carriage, means to elevate said platform, on said carriage, when the former is moved forward on the latter, means to move said platform forward on said carriage, such means comprising a rocking member carried by said carriage, and a link connectingsaid rocking member with said platform, a vertically-movable member on said post and in operative engagement with said rocking member, and means to thrust said vertically-movable member downwardly and to control the upward movement of the 13. In a truck, of the class described, a carriage having at the front end a swivel member with a post, a platform mounted on said carriage, means to elevate said platform on said carriage,when the former is moved forward on the latter, means to 'move said platform forward on said carriage, such neans comprising a rocking member carried by said carriage,- and a link connecting said rocking member. with said platform, a vertically-movable member on said post and in operative engagement with said rocking member, a tongue, and means operated by said tongue to thrust said vertically-movable member downwardly.

14. In a truck, of the class described, a carriage having at the front end a swivel member with a post, a platform mounted on said carriage, means to elevate said platform on said carriage, when the former is moved forward on the latter, means to move said platform forward on. said carriage, such means comprising a rocking member carried by said carriage, and a link connecting said rocking member with said platform, a vertically-movable member on said post and in operative engagement with said rocking member, a tongue, and means operated by said tongue to thrust said vertically-movable member downwardly and to control the upward movement of the same. i

15. In a truck, of the class described, a carriage having at the front end a swivel member with a post, a platform mounted on said carriage, means to elevate said platform on said carriage, when the former is moved forward on the latter, means to move said platform forward on said carriage, such means comprising a rocking member carried by said carriage, and a link connecting said rocking member with said platfori a vertically-movable member on said post and in operative engagement with said rocking member, a tongue adapted to swing in vertical and horizontal planes, and to propel the truck, and means operated by said tongue to thrust said vertically-movable member downwardly.

16. In a truck, of the class described, a carriage having at the front end a swivel member with a post, a platform mounted on said carriage, means to elevate said platform on said carriage, when the former is moved forward on the latter, means to move said platform forward on said carriage, and such means comprising a rocking member carried by said carriage, and link "onneeting said rocking member with said platform, vertically-movable member on said post and in operative engagement with said. rocking member, a tongue adapted to be swung in vertical and horizontal planes, and to propel the truck, and means operated by said tongue to thrust said vertically-movable member downwardly and to control the upward movement of the same.

17. In a truck. of the class described a carriage having at the front end a swivel member with a post, a pl tfc-rm mounted on said carria e, means to p form on said carriage, when the former is moved forward on the, latter me s tomove said platform forward on said ca 1"? means comprising a I'OCl age, such ,ing member carried by said carriage, and a link connecting said rocking member with said platform, a vertically-movable member on said post and in operative engagement with said rocking member, a tongue adapted to be swung in vertical and horizontal planes, and to pro pel the truck, and means operated by said tongue to thrust said. vertically-movable member downwardly in a plurality of separate and distinct operations.

18. In a truck,of the class described,acarriage having at the front end a swivel memher with a post, a platform mounted On said carriage, means to elevate said platform on said carriage, when the former is moved forward on the latter, means to move said platform forward on said carriage, such means comprising a rocking-member carried by said carriage, and a link connecting said rocking member with said platform, a vertically-movable member on said post and in operative engagement with said rocking member, a tongue adapted to be swung in vertical and horizontal planes, and to propel the truck, and means operated by said tongue to thrust said vertically-movable member downwardly and to control the upward movement of the same, each in a plurality of separate and distinct operations.

19. The combination, in a truck of the class described, of a carriage, rocking members journaled in said carriage, links mounted on said rocking members, a platform, rocking members journaled in said platform, sectors mounted on said lastnamed rocking members, pivotally connected with said links, and adapted, when said platform is moved forward on said carriage, to rock upward on their pivotal connections, and to engage said first-named rocking members and rock said links upwardly, and means to move said platform forward on said carriage.

20. The combination, in a truck of the class described, with a carriage, an axle and a rock-shaft journaled therein, links mounted on said axle and links mounted on said rock-shaft, of a platform, rock-shafts journaled in said platform, sectors mounted on said last-named rock-shafts, pivotally connected witl said links, and adapted, when said platform is moved forward, first to rock upward on their pivotal connections, and then to engage said axle and said carriage rock-shaft and rock said links upwardly, and means to move said platform forward on said carriage.

21. The combination, in a truck of the class described, -with a carriage, an axle and a rock-shaft jonrnaled therein, links mounted on said axle and links mounted on said rock-shaft, said carriage having lugs arranged to limit the downward movement of said links, of a platform, rock-shafts journaled in said platform, sectors mounted on forward on said carriage.

22. Thevcombination, in a truck of the class described, of a carriage, an axle and a rock-shaft journaled in said carriage, links mounted on said axle and. links mounted on said rock-shaft, a platform, rock-shafts journaled in said platform, link connections mounted on said axle and rockshafts to elevate said platform when the same is moved forward on said carriage, said axle and said platform rock-shaft limiting the downward movement of said platform, and means to move said platform forward on said carriage.

23. The combination, in a truck of the class described, with a carriage provided at the front end with a swivel member having a post, a platform mounted on said carriage to rise thereon when moved forward, a rocker mounted on said carriage and operatively connected with said platform, and a fulcrum-block mounted to move up and down 011 said post, and operatively engaged with said rocker, of a lever-block mounted on and pivotally attached to said post, above said fulcrum-block, and adapted, when rocked on its pivot, to depress said fulcrumblock, or to permit the same to rise, according to the direction of the movement of said lever-block.

24:. The combination, in a truck of the class described, with a carriage provided at the front end with a swivel member having a post, a platform mounted on said carriage to rise thereon when moved forward, a rocker mounted on said carriage and operatively connected with said platform, anda .fulcrum-block mounted to move up and down on said post, and operatively engaged with said rocker, of a lever-block mounted on and pivotally attached to said post, above said fulcrunnblock, and adapted, when rocked on its pivot, to depress said fulcrumblock, or to permit the same to rise, according to the direction of the motion of said lever-block, and a tongue also pivotally attached to said post and adapted to engage and rock said lever-block.

25. The combination, in a ruck of the class described, with a carriage provided at the front end with a swivel member having a post, a platform mounted on said carriage to rise thereon when moved forward, a TOCKGL mounted on said carriage and operatively connected with said platform, and a fulcrum-block mounted to move up and down on said post, and operatively engaged with said rocker, of a I lever-block having wheels and projections,

lever-block mounted on and pivotally attached to said post, above said fulcrumblock, and adapted, when rocked on its pivot, to depress said fulcrum-block, or to permit the same to rise, according to the direction of the motion of said lever-block, and a tongue also pivotally attached to said post and adapted to be moved into engagement with said lever-block for the purpose of rocking the same, and to be moved out of such engagement for use in propelling the truck.

26. The combination, in a truck of the class described with a carriage provided at the front end with a swivel member having a post, a platform mounted on said carriage to rise thereon when moved forward, a rocker mounted on said carriage and 0p eratively connected with said platform, and a fulcrum-block mounted to move up and down on said post, and operatively engaged with said rocker, of a lever-block mounted on and pivotally connected with said post, above said fulcrum-block, said lever-block having points for engagement with said fulcrum-block which points are at unequal distances from the pivotal point of said lever-block, and operating means for said lever-block.

27. The combination, in a truck of the class described, with a carriage provided at the front end with a swivel member having a post, a platform mounted on said carriage to rise thereon when moved forward, a rocker mounted on said carriage and operatively connected with said platform, and a fulcrum-block mounted to move up and down on said post, and operatively engaged with said rocker, of a lever-block mounted on and pivotally connected with said post, above said fulcrum-block, said lever-block having points for engagement with said fulcrum-block which points are at unequal distances from the axis of said lever-block, such engagement points being on opposite sides of the vertical plane in which said axis lies, and operating means for said lever-block.

28. The combination, in a truck of the class described, with a carriage provided at the front end with a swivel member having a post, a platform mounted on said carriage to rise thereon when actuated f-or ward, a rocker mounted on said carriage and operatively connected with said platform, and a fulcrum-block mounted to move up and down on said post, and operatively engaged with said rocker, of a lever-block mounted on and pivotally connected with said post, above said fulcrum-block, said which wheels and certain of said projections being designed to bear on said fulcrumblock, and a tongue also pivotally connected with said post, and adapted to be moved lengthwise, as well as to be rocked, on its pivot, said tongue being capable of engaging and releasing certain of said projections.

29. The combination, in a truck of the class described, with a rotatable post, and an upwardly-pressed fulcrum-block mounted on said post, of an operating member, and a lever-block mounted on and pivotally at tached to said post, above said fulcrumblock, said lever-block comprising a body having projections to bear on said fulcrumblock, and for engagement by said operating member, and provided with wheels to bear on said fulcrum block.

30. The combination, in a truck of the class described, with a rotatable post, and an upwardly-pressed fulcrum-block mounted on said post, of an operating member, and a lever-block mounted on and pivotally connected with said post, above said fulcrum-block, said lever-block comprising a body having lugs which are adapted to be engaged by said operating member, and to bear on said fulcrum-block, and a lug which also is adapted to be engaged by said operating member, and provided with a plurality of pairs of wheels which are adapted to bear on said fulcrumblock.

31. In a truck, of the class described, 11pper and under sections, a post at the front end of the under section, means to elevate said upper section on said under section, when the former is moved forward on the latter, means to move said upper section forward on said lower section, such means consisting in part of a member arranged to slide up and down on said post, a tongue, and means operated and controlled by said tongue to control the upward movement of said member, under the force exerted by the load on said member, in a plurality of Sep arate anddistinct operations.

32. In a truck, of the class described, upper and under sections, a post at the front end of the under section, means to elevate said upper section on said under section,

when the former is moved forward on the latter, means to move said upper section forward on said lower section, such means consisting in part of a member arranged to slide up and down on said post, a tongue, and means operated by said tongue to impart a downward thrust to said member, said lastnamed means being provided with means automatically to lock the load in raised position at a plurality of separate and distinct levels.

ENOOH WHALLEY. Witnesses F. A. CUTTER, A. C. FAIRBANKS.