US1640718A - Lumber carrier - Google Patents

Description

Aug. 3o, 1927.

1,640,718 E. A. oETzEN LUMBER CARRIER FiledAprl 5, 1925 7 Sheets-Sheet' 1 Aug. .30, 1927. 1,640,718

E. A. OETZEN LUMBER CARRIER Filed April 3. 1926 7 Sheets-Sheet' 2 Aug. 30, 1927. l 1,640;7l8

I E. A. or-:TzEN

LUMBER CARRIER Fired April 192e '7 Sheets-Sheet 5 Aug. 30, 1927. 1,640,718

E. A. OETZEN LUMBER CARRIER Filed April 5, 1926 i '7 .Sheets-Sheet 4 LUMBER CARRIER Filed April s, 192e 7 sheets-sheet; 5

Aug. 30, 1927. 1,640,718 I I E. A. oETzEN LUMBER CARRIER Filled AprilM 1926 '7 Sheets-Sheet 6 Aug.

E. A. OETZEN LUMBER CARRIER Filed April 5. 1926 '7 Sheets-Sheet` 7 Patented Aug. 30, 1927.

UNITED STATES PATENT oFFIcE.

ERNEST A. OETZEN, OF EVERETT, WASHINGTON, ASSIGNOR TO SIJINER IRON WORKS, OF EVERETT, WASHINGTON, A CORPORATION OF WASHINGTON LUMBER CARRIER.

Application led April 3, 1926. 4Serial No. 99,588.

My invention relates to lumber carriers and other types of straddling hoists; The object of my invention is to provide a device of this character. Iwith its hoisting mechanism in such a manner that the power devices can be collected compactly at the middie of the frame and act thru a series of fulcrumed levers to lift the load engaging elements at each corner of the frame.

I attain this object by mounting on a straddling frame. a motor,and arrange the power transmission devices directly connected with said motor across the transverse middle ot the frame and down the middle ot each of the leg portions. I connect the load engaging shoes at the corners of said.

frame to said power transmission devices at that side thru fulcrumed levers. In this manner itis necessary to provide but two sets of power transmitting devices from the' motor to serve four load engaging elements.

In all lumber carriers with which I am familiar, it has been considered necessary to provide separate hoisting means at each cor- 5 ner and to connect each of said hoisting means separately to the motor. By xmy invention. therefore. I am able to save one-l halt' of the powertransmitting devices and thus not onl f/ eliminate theircost, but also eliminate they play which would otherwise he permitted by the connections of their various elements. `j v A further object of my invention is to provide power transmitting devices in which all of thelelements are relatively stitl' members and thus eliminate the frequentbreakdowns caused by breakage of chain, cables, and the like. 1

A further and incidental object of my invention, is to introduce a certain measure o resiliency in said latter stitl" connections to' prevent a blow given to the load carried by Said .carrier from being transmitted withv undiminished force to the hoisting mechanism. To attain this later object,I proportion'th'e connections at either or both ends ot the fulcrumed levers so that there is a substantial play in said connections and thus if said load engaging shoes strike a projection, the blow thus given said shoe will .not

be transmitted directly to said hoisting mechanism because of the play thus provided, and thus said connections will not be strained.

Further devices'forcushioning said con nections are spring elements in said power transmission devices, which springs are ari' ranged so that they do not carry any of the load, but permit the fulcrumed levers to be rotated by a jar or blow if the play provided is insuicient. In other words, the spring elementsv provided in said power transmitting devices supplement the play provided 1n said connections to permit vthe movement of said shoes upwardly upon striking a pro.- jection without injuring the power transmitting devices or the hoisting mechanism.

Further details of construction and the Inode of operation are hereinafter described with reference to the accompanying drawings, in which:

Fig. 1 is a perspective view of a lumbel carrier, embodying my invention;

Fig 2 is a plan view thereof with th seat and other auxiliary devices remov from the top of the frame to disclose details of construction, which would otherwise be concealed;

Fig. 3 is a. vertical `section taken on the line 3-3 of Fig. 2 showing the hoisting devices at one side of said lumber carrier in elevated position;

Fig. 4 is an enlarged fragmentary eleva.- tion of said hoisting devices as viewed in Fig. 3;

Fig. 5 is a similar scaled section taken on" the line 5.-5 of Fig. 4;

Fig. 6 1s a similar scaled section taken on the line 6 6 of Fig-4 thrn the load engagf ing element at one end on saidstraddling legs.

Fig. 7 is a similarsection taken on the line 7 7 of Fig. 4 showing'one load engagintg element, the load engaging ange ca r- -ried thereby and also the guides for said "load engaging element;

,Fig/8 is a still lar er scaled section of the innery end of one o said fulcrumed levers illustrating how a separate wearing plate can be provided;

edu

.carrying space 1c between them.

Fig. 9 is a section of said end taken on the line 9-9 of Fig. 8;

F ig; 10.is a transverse section taken on the line 10-10 of Fig. 3;.

Fig. 11 is a section taken on the line 11-11 of Fig. 3 except on a larger scale, showing the power transmitting means at one side of the lumber carrier;

Fig. 12 is a fragmentary elevation showing a modified embodiment ofmy invention in which the power transmitting devices include a pulley-and-cable element;

Fig. 13 is a plan view of the modification shown in Fig. 12;

Fig. 14 is a section taken on the line 14--14 of Fig. 12;

Fig. 15 is a fragmentary elevation of a still further modification of my invention in which the power transmitting devices eiiibody a piston-aiid-cylinder element, said elevation being taken substantially on the line 15-15 of Fig. 16;

Fig. 16 is a plan view of said latter modification; Aand Fig. 17 is a transverse section thereof taken substantially on the line 17-17 of Fig. 15.

My improved lumber carrier comprises a r frame having dependent sides 1a and 1b spaced apart laterally and defining a load Said frame is mounted on wheels 2 carried by spindles 3, the front spindles being guidable by steering mechanism comprising arms'4a connected together by a rod 4b and connected to the steering wheel 4V and by a rod 4d, in the usual manner. y

Each of said side portions comprise horizontal channel or I-beam'members ld which are spaced apart and carried by end members le. At the center of each side frame two vertically arranged structural members 1t are provided spaced apart and defining a guideway between them, and in said guideway a block 5 is mounted for reciprocation in said guideway, and held by said structural members 1f at each side thereof.

Between said structural members lf and the end members 1" are located, at each side, trunnions 6, said trunnions being carried by the lowermost side member 1d being fastened thereto by bolts 61.

Extending inwardly from said trunnions 6 are centrally arranged stub-shafts 6b. Said trunnion is provided with an upstanding web portion 6c and to said web portion I connect divergent structural members l1g which connect to the uppermost side member 1d as shown clearly in Fig. 3. Said structural members 1g thus t-ie each trunnion 6 to the uppermost frame member 1L so that the said trunnions are connected to said upper member as well as to the lowermost one upon which it is seated. Said structural members diverge towards said upper'memengaging members 8` at each end of said sides.

The ends of said 7ZL and 7b of said fulcruined levers 7 are' preferablyvformed into circular knobs, the ends 7a engaging a boxing 8ft formed in each of said load engaging members 8 and the ends 7b of the fulcrumed levers, at each side of said frame, engaging boxings 5a in the slidable block at that side of said frame.

Said circular ends 7 and 7b respectively are preferably provided with wearingplates 7c and 7d, respectively, made of harder material but conforming to the outline of said ends 7a and 7b respectively and being' fastened thereto by stud-like pins 12. A wearing plate made of harder material thus minimizes the wear upon said circular ends without increasing the cost thereof a substantial amount.

Said load engaging members 8 are mounted for vertical reciprocal movement in said side portions, and the load engaging members at each side Carry a slightly flexible load engaging iange 9 between them, saidload engaging flange being fastened to each 4by a stud 10.

ceeding the width of said boxings by a substantial degree and the remainder of the length of said blocks is formed into guides 5b which are connected .by a plate-like web 5c. Formed upon said block 5 are two spaced ears 5d and pivotally mounted between said ears on a pin 13 is a tongue 14a which is an integral portion of a box 14 as shown clearly in Figs. 4 and 11.

A threaded lifting rod 15 is connected to said box thru spring elements 16 carried on guide pins 17 in said box. Said threaded rod 15 terminates in a T-head 15a, which is provided with apertures thru which said guide pins 16 extend and thus said pins act not only as keepers for the springs 16 but also as guides for said rod 15, whenlthe latter tends to twist in said box 14 and the rod 15 is journaled at its upper end in a casing 18'carried by the uppermost side member 1d.

Keyed to said threaded rod is a bevel gear keyed to the stub-shaft 21 also journaled lin said casing 18. Fixed to said stub-shaft 21 l -is a sprocket 22 which is connected to a sprocket 23 on the transverse shaft 24, by a chain 25. v

Similar lifting mechanism is provided at the opposite side of said lumber carrier and operates similar hoisting mechanism at that side, both of said power transmission devices being connected to the main shaft 24, which is in two halves, each half being'rotated in opposite directions thru ordinary reverse gearing 24. y

The said reverse gearing is connected to the motor 26 thru a power take-olf shaft 27, and the main propelling shaft 28 is used for driving the vehicle thru a rear driving shaft 29 and chains 30, in the common manner. Said reverse gearing is controlled by a hand lever 31 fadjacent'the drivers seat.'

Said hand lever is connected to a pivoted control rod 32 thru a link 33 and thus when the lever 31 is pulled in one direction it will move the reverse gear so as to lift the load, and when moved in the opposite direction will reverse said hoisting mechanism and permit said load to be lowered.

Especial attention is called to the conneev tion of the fulcrumed levers with the block 5 and with the load engaging devices'8 respectively, such connections being shown clearly in Fig. 4. The boxings 5a and 8a respeetively,in said block and said load en gaging elements are substantially wider than the diameter of said circular ends 7b and 7 a,

said slide 35, and the end ofsaid cable is levers 7 to move slightly without affecting J the power transmission devices.

Furthermore this play provides for the slight elongation of the levers 7 as they approach a horizontal position on their fulerums. f l

As an added precaution to prevent injury to said power transmission devices, I provide the springs 16 previously noted. Thus, if the load engaging elementl 8 shown in Fig. 4 was driven upwardly by a blow', it would rock the lever 7 counter-clockwise about the stub-shaft 6b and would cause the circular ends 7a and 7b, respectively, to take up the play in their boxings 5l and 8, respectively. If the blow tends to cause 'saidl parts vtomove further, the engagement 'of said block-'thru the boxing 5a would be pulled downwardly in its guides 1f, and the springs 16 supporting said boxing would be compressed slightly. The amount of play between said circular ends and their boxings, however, is proportioned to take care of all ordinary jars because said block 5 will be held, to a certain degree, in position by the end 71 of the opposite lever, if only one of said levers is rocked.

In Figs. 12 to 14 inclusive, I show .my invention embodied in a lumber carrier in which the power transmitting devices coinprise a drum-and-cable lift. In all other respects, however, the parts are the same as the lformer modification, and thus will not be described in detail, but will be referred to by the same reference characters given' said parts in the modification shown in Figs. 1 to 11, inclusive.

The fulcrumed levers 7 are connected by the sliding block 34 which is carried by the lower end of a post-like slide 35, arranged for vertical Vreciprocation in the frame of said lumber carrier between the guiding flanges 1f. Carried by each of said postlike slides 35 are one or more rotatably mounted sheaves 36, two being vshown in Fig. 12, for convenience. A cable drum 37 is carried by each end, of the transverse driving shaft 24" carrying reversing mechanism 24 and a cable 38 is wound about the periphery of cach of said cable drums 37, and is passed under a fixed guide pulley 39 rotatably carried by the frame adjacent said post-like slide. From there the cable lis lead over said guide sheaves 36 carried by anchored to the frame upon a pin v40 at the opposite side of each of said post-like slides To lift a load of lumber, it is necessary that the load engaging elements 8 be moved upwardly, and thus the fulcrumed levers 7 must be'rocked to lift each of the ends 7 thereof and lower the ends 7b. To lower the ends 7b, the post-like slide 35 must be lowered corres ondingly.

The mass o -said post-like slides is considerably less than that of the load engagingelements 8 andl thus said load engaging elements, even when disengaged from a load will tend to move said box-like slides upwardly. Therefore, whenfa load is carried by said elements 8, the force tendine; to

tightened, and said post is permitted to move upwardly when said cable is slackened.

In lthis modification, it is not necessary to provide a spring-like element similar to .the elements 14, A16, and 17in the previously described modification because said slide is p ment for the purpose describe free to be moved downwardly because of the absence of stiff holding means tending to move the 'same upwardly. v In Figs. l5 to 17 inclusive, I show a still further modification of a lumber carrier embodying my invention. In this latter modification, power transmittingr means comprising a piston-andrcylinder element is -provided to reciprocate the slidable block 5 vertically in its guides 1f.

The rods 41 shown in Figs. 15 to '17, inclusive, are the piston rods depending from the piston-aiid-cylinder elements 42 carried upon the upper portion of the frame 1. Said pistons are reciprocated to and fro 'in said cylinders by fluid compressed by a pump element shown diagrammatically as- 43, which pump element is driven by a motor.

indicated diagrainmatically as 44.

Each cylinder is controlled by a separate valve 45 which not only controls the flow of fluid to said piston, but also the flow from the latter, said piston-aiid-cvl.inder element being double acting. A fluid supply pipe 46 is branched and connects from .said pump 43 to both of the valves 45,'and a discharge pipe 47 is similarly connected to said valves and said pump. A rod 48 connects the actuating levers 49 on each ot said valves, which actuating levers are arranged to be actuated similarly when the rod 48 is moved in one direction. l Y A Thus, for example. the valves are arranged to supply fluid to the cvlinders 42, to actuate the same and to lift the load carrying elements when said rod is moved towards the left in Fig. 17. When the rod is reversely moved, said valves are arranged to actiiate said piston-and-cylinder elements to drive the pistons in the opposite direction to lower the load engaging elements. i

In this modification, I show the elements 14, 16, and 17 also shown in the modification in Figs. 1 to 111, inclusive, for the reason that even thov a compiessible fluid is used, the pressures in said cylinders vwill be so intense that veryvlittle relative elasticity will be provided thereby.

I cla-im:

1. A lumber carrier of the character dcscrihed. comprising ia load straddling frame, verticallv slidable load engaging elements carried by the corners of said frame, fulcruined levers engaged at one end -to said load'carrying elements respectively,- vertically movable, centrally located power transmittins,r element with which the other ends of said levers are connected, a motor and connections therefor to said power transmitting element, including a yielding ele- 2. A lumber carrier of the character described, comprising a load straddliiig frame, vertically slidable load'. engaging elements carried by thevcorners ofsaid frame,wfu1 crumed levers engaged at one end to said load carrying elements respectively, verti said frame vertically slidable therein and constituting the connecting means of said power transmitting element With 'said fulyielding element for the purpose described.

3. In a lumber carrier of the character described, a load straddling frame having laterally spaced dependent side portions, said side portions comprising two longitudinally arranged members spaced apart va substantial distance, a motor carried by said frame,'po\ver transmission means operatively connected` to said motor, vertically slidable load carrying elements carried by the corners of said frame, fulcruined leversengaged' at one end with said load carrying elements, respectively, pivots for said levers carried by one of saidlongitudinal -members, divergent'frame members connecting each pivot to the other of said longitudinal members, and the other ends of said fulcrumed-levers being connected to said power transmission means. L

4. In a lumber carrier of the character described, a load straddling frame having laterally spaced dependent side portions, a motor carried by said frame, power transmission means operatively connected to said 'motor, vertically slidable load carrying elements carried by the corners of said frame, said frame and 'said elements having miitiilally formed engaging shoulders abutting when said load engaging elements move to lowered or load engaging position, fulcrumed levers engaged at one end with said load carrying elements,l respectively, the other ends of said fulcrumed levers being connected to said power transmission means.

5. In a lumber carrier ot the character de-A 4crunied levers, and said block including a i'io scribed, a load straddling frame having laterally spaced dependent side portions, 'a motor carried by said frame, power-.transmission means operatively connected to said motor, vertically slidable load carrying elements carried by the corners of said frame, means carried by eachl of said load engaging elements and said frame, respective] for limiting the movement of` said loa engaging elements in said frame in one direction, fulcrumed levers engaged at one end with said load4 carrying elements, respectively, and the other ends of said fulcrumed levers being connected to said power transmissionmeans.

6. In a lumbercarrier of the character described, a loadstraddling frame having l threaded screw connected therewith, fulcrumed levers engaged at one endwith said load carrying elements, respectively, and the other ends of said fulcrumed levers being connected to said blocks.

7. In a lumber carrier of the character described, a load straddling frame having laterally spaced dependent side portions,ja motor carried by said frame, powertransmission means operatively connected to said v motor, vertically slidable load carrying elelments carried by the corners of said frame, lsaid power transmission means comprising a block vertically slidable in each of said side portions, and a vertically mounted threaded screw connected therewith, ulcrumed levers engaged at one end with said load'carrying elements, respectively, the other ends of said :tulcrumcd levers v.being connected to said blocks, Vand the end of each of said screw engaged by said blocks, respectively, terminating-in a T-shaped head, said block car? rying a box, and a spring element spacing ghe T-shaped .end of said screw from said 8. In a lumber carrier of the character described, a load straddling frame having laterally spaced dependent side portions, a motor carried by said frame, power transmission means operatively connected to said motor, vertically slidable load carrying elements rarried by the corners of said frame, said power transmission-means comprisin a block vertically slidable in each of sai side portions, and a vertically mounted threaded screw connected therewith, fulcrumed levers engaged at one end with said load carrying elements, respectively, the other ends of said fulcrumed levers being connected to said blocks, the end of each of said screw engaged by said blocks, respectively, terminating in'a T-shaped head, said block carrying a box, Vand a spring element spacing the T-shaped end of said screw from said box, and guide pins in said box, the

end of saidA threaded rod being slidably mounted "o n the latten i 9'. In a lumber carrier of the character-described, a load straddling frame having laterally spaced dependent side portions, a motor carried by said frame, power transmission means operatively connected to said motor, vertically .slidable load carrying elements carried by the corners of said frame,

lulcrumed levers engaged at oneend with said load carr ing elements, respectively, the other ends o saidfulcrumed levers being connected to said power transmission means said levers terminating in circular knobs, an said load engaging elements and said block provided with boxings engaged thereby.

10. In a lumber carrier ofthe `character described, a load straddling frame having `laterally spaced dependent side portions, a

motor carried Iby, said frame', power transmission means -operatively connected to said motor, vertically slidable-load carrying elements ,carried by the corners of said frame, fulcrumed levers engaged at one end lwith said load carrying elements, respectively, the other ends of said fulcrumed levers being connected to said power transmission means, said levers terminating in circular knobs, and said load engaging elements and said block provided with boxin size than said circular knob-like ends to provide a substantial degree of play in said connections.

11. In a lumber carrier of the character described, a. load straddling frame havin@` laterally spaced dependent side portions, sai side portions comprising two longitudinally arranged members spaced apart a substantial distance, a motor carried by said frame, power ,transmission means operatively connected to said motor, vertically slidable load carrying elements carried by the corners of said frame, ulcrumed levers engaged at one end with said load carrying elements, respectively, pivots for said levers carried by one of said longitudinal members, tension tying members connectingeach pivot to each of \said longitudinal-members, and the other ends ofi. said fulcrumed levers being connected to said power transmission means.

ERNEST A. OETZEN.

s engaged thereby, said boxings being of su stantially larger

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