US992212A - Skid-lifting device. - Google Patents

Description

Patented m 16, 1911.

4 BHEETSSHEET 1.

IN VENT'OR wflk'm 4.064%

ATTORNELYS.

1W17'NEssEs W. H. KRATSGH.

SKID LIPTING DEVICE.

APPLICATION FILED MAR.13,1909.

992,212, Patented May 16,1911.

4 SHEETS-SHEET 2.

.INVENTOR I fl W {TNESS 2 ATTORNEYS W. H. KRATSCH.

SKID LIFTING DEVICE.

APPLICATION FILED MAR. 1a, 1909.

U m a 9 m m T a M M M m n .n m E o z I I l l IIIL M m .1 m H .n I n m u m i R W. H. KRATSGH.

SKID LIFTING DEVICE,

APPLICATION IILED MAR.13, 1909.

Patented May 16, 1911.

4 SHEBTS-SHEET 4.

INVENTOR WITNESSES ,4 TTOKNL Y6 UNl'ftllD STA Eli-l PATENT @FFTCE.

WILLIAM H. KRATSCH, OF OSHKOSsH, WISCONSIN, ASSIGNOR TO CHALLONER COMPANY, OF OSHKOSH, WISCONSIN, A CORPORATION OF WISCONSIN.

SKID-LIFTING DEVICE.

Specification of Letters Patent.

Application filed March 13, 1909.

Patented May 16, 1911.

Serial No. 483,171.

To all whom it may concern:

lie it known that I, \Vnmu )I ll. Kavrscu, a citizen of the United States, residing at Oshkosh, county of Winnelmgo, and State of Wisconsin, have invented new and useful Improvements in Skiddn't'ting Devices, of which the following; is a specification.

My invention relates to improveuu-nts in skid lifting devices for lo; loading and turning machines.

The object of my invention is to provide automatic means for lifting the skids preparatory to the. loading operation, in which the operation of the log loading means w ll be dependent upon the operation of the skid lifting means, or the two mechanisms rendered so interdependent that they can be operated in sequence through the medium of a single controlling lever, and preferably through a single operation of such lever.

In the following description. reference is had to the accompanying drawings, in which- Figure 1 is a perspective View of a log loading and turning machine embodying my invention. Fig. 2 is a plan view of a portion of such machine, showing the steam cylinders and the arrangement of the pipe connections for the auxiliary or skid lifting cylinder. Fig. 3 is a side view of the auxiliary or skid lifting cylinder and its skid lifting connections. Fig. 4 is a side view of the log loading cylinder, with the valve casing and a portion of the cylinder partially broken away to show the arrangement of the ports. F ig. 5 is a detail plan view of a portion'of the log loading cylinder, showing the main steam controlling valve casing and ports in horizontal section.

Like parts are identified by the same reference characters throughout the several views.

My invention is illustrated as applied to a log loading machine of the type kn wn as the .Simonson log loader and turner, which a rocking engine cylinder A is em ployed to oscillate a rock shaft C by means of piston roda and arm d, thus swinging the log loading arms D and E,-another steam cylinder B being employed to operate a 16g turning hook F. These general featunes are all-shown and described in U. S. .patents' to Simonson, numbered 408,7 60, and 448,593, and are therefore not herein more specifically described.

'tral passage 31 in the valve.

The skids G are ordinarily supported at the ends nearest the carriage II by means of blocks l and cams J, which are mounted to oscillate upon the rock shaft 0. in my improved structure, these cams are free to oscillate indqiendently oi the shaft C and are actuated from a hack shaft 1 through arms 1? which are .t'ast thereon, links 3. and arms 4, the latter being connected with the respective cams. The cams, in one position, support the skids at or a little above the level of the carriage H, and in another position permit the skids to drop below such level at the, ends adjacent to the carriage.

The back shaft 1 is actuated from the auxiliary cylinder 6 through its piston rod 7, connectinp rod 8, and a crank arm 9 carried by the back shaft. A steam controlling valve at 11 is adapted to admit steam to the inner end of cylinder 6, through port 12, flexibly jointed pipe 13, coupling member 14, and pipe 16. When actuated in the other direction from normal position, this valve admits steam to the other end of cylinder 6 through port 15, flexibly jointed pipe 17, coupling member 14 and pipe 18. The c0ntrolling valve is actuated from a lever 20, through a rod 21, bell crank 22, rod 23, lever 24-, and valve stem 25, whereby the valvemay be adjusted to admit steam to either of 35 the pipes 13 or 17, or to a central closed or normal position.

The steam cylinder A is provided with steam passages 27 and 28 along its under side, the passage 27 leading from port 12 to the outer end of cylinder A, and the passage 98 leadinp; from port 15 to the inner end of cylinder A, viz:-thc end nearest the carriage. When in normal position, as shown in Fig. 5, both ports 12 and 15 may be respectively open to an exhaust passage 29 past the end of the 'valve and through a cen- In the other positions one port is open to the exhaust and the other to the live steam.

Valve 30 is actuated from the piston rod 7 of the auxiliary cylinder, through the co'nnet-ting rod 8, back shaft 1, crank 35, rod 36,

elbow crank 37, rod 38, crank 39, and valve stem 40, the elbow crank 37 being mounted to oscillate upon a shaft 41, u on cylinders A and B are pivoted. The crank 35 is slidingly connected with the rod 36, with stops 42' and 43 limiting its free motion;

which the I so that rod 36 is only actuated during the final movement of the crank in either direction. It will therefore be observed that the admission of steam to the outer end of cylinder A is dependent entirely upon the movement of piston 45 in the auxiliary cylinder. The outward movement of this piston first lifts the skids, and as this movement is completed, the valve is actuated to admit 'steam to the outer end of cylinder A and thus actuate the log loading arms. Conversely, aretractive movement of the piston d5 in the auxiliary cylinder first lowers the skids and then closes valve 30, the steam in cylinder A having in the meantime passed baclmvardly to port 12 and the exhaust; It is not-material whether the admission of steam to the inner end of cylinder A is similarly controlled or not, since in the retractive' movement, the skids may be lowered, either before or after the operation of the arms D and E.

By adjusting the stops 42 and 43 on therod 36, the admission of steam to cylinder A throrgh valve 80.n1ay be made to take place at any desired period during the stroke .of piston A5. The admission of steam-to cylinder B is independent of the auxiliary or skid lifting cylinder, but is preferably controlled through a movement of the same manually actuated lever, which is pivoted to a rock shaft and when swung laterally, rocks this shaft and transmits motion through a crank arm. 51 and rod 52 to a valve stem to operate a valve at 54 con trolling the admission of steam to cylinder permitted to remain in a stationary position. while the casing of the controlling valve rocks with the cylinder A. It is not mate rial to this invention, how the several. cylinders are placed nonsvhat connections are used to transmit motion from their respective pistons to the skids. The only essential feature of the construction is that the operation of the log loading means is made dependent upon the prior operation of the skid lifting or adjusting means.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1 In a log loader provided with skid lifting devices, the combination with fluid operated loading means, of an auxiliary fluid chamber, a movable member therein operatively connected with the skid lifting devices, and means, operated from said movable member, for controlling the delivery of fluid to the log loading means.

2. In a log loader provided With movable skids, the combination with log loading mechanism, of fluid actuated skid lifting devices, and means, operatively connected therewith, which actuates the log loading mechanism after the initial skid lifting movement.

8. In a log loader provided with movable skids, the combination with skid lifting cams, and swinging log loading arms, of

actuating mechanism for the skid lifting cams, other actuating mechanism for the log loading arms, and means, connected with the cam actuating mechanism, for'controlling the operation of the log loading mechanism, whereby said skid lifting and log loading operations are performed in sequence.

4-. In a log loader provided with movable skids and log loading devices, the combinaton of a log-loading motor, and a skid lifting motor, a manually actuated lever controlling the operation'of the last mentionedmotor, and connections for transmitting power from said motor to control the oper ation of the log loading motor.

5. In a log loader provided with movable skids and log loading devices, the combination of a cylinder and piston for operating the log loading devices, another cylinder and piston for lifting the skids,- a main valve. controlling the admission of motive fluid to both cylinders, another valve also controlling the admission of motive fluid to the log loading cylinder, and connections for actuating said last mentioned valve from the piston of the skid lifting cylinder.

6. In a log loader provided with movable skids and log loading devices, the combination of a cylinder and piston for operating the log loading devices, another cylinder and piston for lifting the skids, a main valve controlling the admission of motive fluid to both cylinders, another valve also controlling the admission of motive fluid to the log loading cylinder, and connections for actuating said last mentioned valve from the piston of the skid lifting cylinder, together with a manually actuated lever for adjusting the first mentioned valve.

7. 2111 a log loader provided with movable skids and log loading devices, the combination of a cylinder and piston for operating the log loading devices, another cylinder and piston for lifting the skids, a main valve controlling the admission of motive fluid to both cylinders, another valve also controlling the admission of'motive fluid to the log loading cylinder, and connections for actuating said last mentioned valve from the piston of the skid lifting cylinder,

together with a manually actuated. leverfor adjusting the first mentioned valve, and a log turning mechanism, a cylinder and pis- .ton for operating the same, a valve controlling the admission of motive fluid to said cylinder and independent connections with said manually actuated lever for operating said valve, said connections being adapted only for the transmission of lever movements of a different character from those which actuate the valve controlling the skid lifting and log loading mechanism.

8. In a log loader, the combination with -a set of movable skids, and a set of swing ing log loading arms, of fluid receiving cylinders, a piston in one of. said cylinders operatively connected with the log loading arms, a piston in another of said cylinders, suitable devices operatively connected therewith and adapted to lift the skids, and a single manually actuated device arranged by movement in one direction to control the admission of fluid, first to one of said cylinders and then to the other.

9. In a log loader, the combination with a set of movable skids, and a set of swingin log loading arms, of fluid receiving cylin ers, a piston in one of said cylinders operatively connected with the log loading arms, a piston in another of said cylinders,-

ally actuated device and its connections being arranged to necessarily admit said fluid, first to the cylinder containing the skid lifting piston and then to the other of said cylinders' In testimony whereof I alfix my signature in the presenceof two witnesses.

WM. H. KRATSCH. Witnesses:

EDWARD J. DEMIBEY, BART W. Hniss.

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