US1548749A - Logging engine - Google Patents

Description

E. D. ROBERTS LOGGING ENGINE 'Aa Q 4. 1925.

Filed March 22, 1921 4 Sheets-Sheet 1 E. D. ROBERTS LOGGING ENGINE 4 Sheets-Sheet 2 Filed March 22, 1921 (lttomaq WWW Aug. 4. 1925. G 1,548,749

E. D. ROBERTS LOGGING ENGINE Filed March 22, 1921 4 Sheets-Sheet 5 gs Q Q I E f u mmmlllll (Q V K31 Q 1 1\ A g Q I g 9% Q 3% K v m 1 Aug. 4. 1925.

E. D. ROBERTS LOGGING ENGINE Filed March 22, 1921 4 Sheets-Sheet 4 Patented Aug. 4, 1925.

UNITED STATES EUGENE D. ROBERTS, OF TACOMA, WASHINGTON.

LOGGING ENGINE.

Application filed March 22, 1921., Serial No. 454,561.

To aZZ whom it may concern:

Be it known that I, EUGENE D. Ronnirrs, a citizen of the United States, residing at Tacoma, in the county of Pierce and State of Washington, have invented a new and useful Logging Engine, of which the following is a specification.

This invention is a new and useful mechanism for controlling the rotation of the various drums of a logging engine or the like, and for also controlling the speeds at which said drums may berevolved.

One of the objects of the invention is to provide a system of gearing, by means of which a compound gear-driven lower drum shaft is provided, and by means of which the rotation of the upper drum is controlled in such manner as to permit the cable to be wound over the top of the upper drum,

in a manner which will not interfere with the operation of a drum on the lower drum shaft, directly in front of said upper drum. A further object is to provide adjustable bearings for the lower drum shaft, whereby'the same may be variably positioned to accommodate drive gears of different sizes, substituted one for the other, thereby providing means by which the parts may be altered from aihigh speed to a lower speed, or vice versa, with a wide range of speed variations. A further ob ject is-to provide an intermediate shaft, and a quick speed change mechanism n1ounted thercon,with control means so designed that'it will be impossible to engage one speed without disengaging the other. A

further object to provide'ai'ixed fric-j tion spider on theintermediateshaft, and shiftable clutch members loosely'mountcd on said shaft, and positioned to engage the same, simple and efficient means being pro vided whereby the clutch members may be actuated by the above mentioned control means. I p

The invention will be hereinafter fully set forth and particularly pointed out in the claims. 7

In the accompanying drawings v Figure 1 is a side elevation illustrating a logging engine constructed in accordance with the invention. Figure 2 is a top plan view thereof partly in section. Figure is a diagrammatical sectional view illustrating the clutch mechanism on the intermediate shaft. Figure 4 is a similar View illustrating a modified form of control mechanism. Figure 5 is a detail end view of Figure 4:. Figure 6 is a detail cross sectional view illustrating the clutch spider. Figure 7 is a detail cross sectional view illustrating the arrangement of the wing sleeves. Figure 8 is a detail longitudinal sectional view of the sleeve pinion.

Referring to the drawings, 10 designates a frame or base of any preferred construction, upon which is mounted the boiler 11, which supplies steamto reciprocating engines 12, one on each side of the boiler. The drive rods 13 of the engine, are connected to cranks 14, on the ends of a crankshaft 15, which is provided with drive gears 16 and 16 of different diameters.

Mounted in suitable bearings, carried by the frame, is an upper drum shaft 17 located above and parallel with the crankshaft 15. The lower drum shaft 18 is mounted in bearings 19 secured to the frame 10 by means ofbolts 20, which are passed through suitable openings in flanges formed on said frame 10. A series of 'said openings are provided and said bolts are removable to permit of adjustment of the bearings along the frame for a purpose to be later described. The intermediate shaft 21 is mounted in bearings 21, secured to the frame in a plane between the bearings for the crankshaft and those for the lower drum shaft. Loosely mounted on said intermediate shaft is a gear 22, which is in mesh with the drive gear 16 of the crankshaft. The gear 22 normally runs idle on the intermediate shaft 21, and meshes with a pinion 28 on the upper drum shaft. By means of this arrangement the upper drum shaft is driven at a constant speed by the crank shaft 15 through said gear 22.

- The lower drum shaft is driven by means of a gear 24, keyed to the intermediate shaft, and meshing with a gear 2 1 on the said drum shaft. The bearings 19 are made adjustable upon the frame 10, to permit of gears 24 of different sizes being substituted one for the other, it being necessary to adjust the lower drum shaft along the frame to accommodate the particular size of drive gear which may be selected, the size of gear 24 remaining unchanged.

As illustrated in the drawing, the lower drum shaft is provided with two drums 25 and 26, the drum 25 being provided with a clutch 27, controlled by the friction screw 28, whereby it may be coupled up with the gear 24. In a similar manner a clutch 29 controlled by the friction screw 30, serves to connect and disconnect the drum 26 with the lower drum shaft. The friction screws 28 and 30 are controlled by suitable handles 31 in a well-known manner. Two drums are shown for purposes of illustration, it being understood that any desired number of drums may be employed.

Loosely mounted on the intermediate shaft 21 is a second drive gear 32, meshing with the gear 16'on the drive shaft. The gears 22 and 32 are slidably mounted upon said intermediate shaft. Keyed to the shaft 21, between the gears 2.2 and 32, a clutch spider 35, the side faces of which are pro vided with clutch grooves 36 and 37 respectively, shaped to receive clutch blocks 38 secured to the contiguous faces of the said gears 22 and 32. The gears 22 and 32 are normally pressed away from the spider 35, to unclutched position, by means of springs carried by bolts 39 clearly illustrated in Figure 3, but are never disengaged from their respective drivegears 16 and 16 Abutting against the outer face of the gear 22 is a thrust collar 40, encircling the intermediate shaft 21, and bearing against said thrust collar are wing sleeves 41, which are passed through suitable openings formed in the gear 24, in a manner LO permit longitudinal movement of said win sleeves along the shaft 21. Abutting against the outer end of the wingsleeves 41, is a thrust sleeve 42, which is actuated by means of a pin 43, reciprocably mounted in a longitudinal bore formed in the end of a shaft 21, said pin being provided with a gib key 44, bearing against the outer end of the sleeve 42. Bea-ring against the outer end of the hub of the gear 32 is a thrust collar 45, which is engaged by agib key 46, formedon' a pin 47, mounted in a manner similar to the Bcciprocation is imparted to the pins 43 and 47 in any suitable manner. It is desirable, however, to so arrange them, that as I one is moved inwardly the other will move outwardly. The preferred form is that illustrated in Figures 2 and 3, in which the pins 43 and 47 project into pressure chain: bers 48, provided with pistons 49, which are secured to said pins. Fluid pressure, preferably steam, is introduced into the chamhers-48 from any suitable source, by means of pipes 50'and 51 respectively, controlled by a four-way valve 52. By this arrangement, when pressure is admitted into the right hand chamber 48, it. is simultaneously exhausted from the left hand chamber, and vice versa. When pressure is introduced into the right hand chamber 48, for instance, the pin 43 is forced inwardly, imparting corresponding longitudinal moi ement' to thrust sleeve 42, and the wing sleeve 41, and the pressure of the latter against the collar 40, will force the gear 22 into clutching engagement with the spider 35. By this means the lower drum shaft is rotated through the medium of the gear 16, the upper drum shaft being driven by reason of the engagement of the gears 22 and 23. If it is desired to rotate the lower drum shaft at a faster speed, pressure is introduced from the right hand chamber. Thereupon the springs 39 will force the pinion 22 to unclutched position, and the pin 47 will force the gear 32 into clutched position, so as to drive the intermediate shaft through the mediu'mof the goal- 16. In this manner, the speed at which the said lower drum shaft isdriven is selectively controlled, and it is impossible to throw either gear 22 or 32 into clutching position, wit-hout simultaneously throwing the other into unclutched position. It will be noted in this connection that the gear 22 is always 111 mesh with the gear 23, whether th s former is clutched to thespider 35 or not. In other words, the only efi'ect of clutching the gear 22 with the spider 35 is to place the intermediate shaft 21 into operation at the speed fixed by the ratio of the pinion 16 with respect to the gear 22, without in any manner affecting the speed of drive of the upper drumv shaft.

In Figure 4 is illustrated a modified construction, by means of which the clutching and unclutching of the gears 22'and 32 is controlled. In this form, the wing sleeves 41, thrust sleeve 42 and thrust pins 43,and gib key 44, are employed as in the form already described. In lieu of the pressure chambers and pistons, the pins 43 and 'b key 44 are reciprocated by means of sproc et thrust screws 53, which are provided with actuating sprocket wheels 54, driven by chains 55 which are actuated by sprocket gears 56, on an operating shaft 57, which may be rotated in any suitable manner. As shown in the drawing a crank lever 58 is employed the same being secured to the shaft 57, a suitable quadrant 59 and latch 59? being employed to retain. said lever in any adjusted posit-ion. .It is obvious from the drawing, that when the shaft 57 isro tated in onedirection, one of the sprocket thrust screws 53 will move outwardly and the other one will move inwardly, and vice versa, upon reversing the rotation of the operating shaft. In this manner one drive gear becomes unclutched before the other one reaches the clutched position.

The upper drum shaft may be provided with any number ofdrums, two such drums 60 and 61 being illustrated in the drawing,

said drums being provided with clutches 62 and 63 respectively, by means of which they may be connected with or disconnected from the drive shaft. These clutches are controlled by threaded thrust screws 64, in a well-known manner.

For convenience in placing the spider 35 in position, and removing it from the shaft for the purposes of making repairs, it is preferred to construct the same of a plurality of sections, as illustrated in Figure 6. In said figure the spider is shown as formed of two sections A and B, united by bolts 65.

From the foregoing it will be readily seen that the invention provides a simple system of gearing, by means of which the upper drum shaft may be rotated in a direction to avoid interference with the operation of a drum on the lower drum shaft, directly in front of the upper drum, and at the same time means are provided whereby the lower drum shaft may be driven at different speeds. By means of the adjustable bearings for the lower drum shaft, the latter may be variably positioned to accommodate driving gears of different sizes, substituted one for the other, thereby providing means for further varying the speed of said shaft. A particular advantage of the construction illustrated, is that a fixed friction spider on the intermediate shaft is provided, th same co-operating with shiftable gears, loosely mounted on the shaft and having means to engage the spider, and simple control means so designed that it will be impossible to engage one gear with the spider, without disengaging the other. Thus it will be observed that an exceedingly simple and strong mechanism is provided, which will not readily get out of order, and which will possess a maximum of efficiency. A further advantage is that by mounting the upper drum shaft over the drive shaft and maintaining the gear 22 in mesh with the gear 23, a very compact mechanism is produced having provision whereby a number of drums may be conveniently placed on the lower drum shaft, without requiring any longer base than has heretofore been required for a single drum under existing practice.

Having thus explained the nature of the invention and described an operative manner of constructing and using the same, a though without attempting to set forth all by said intermediate shaft, selective drive gears loosely mounted on the intermediate shaft and meshing with the respective gears on the drive shaft, means by which either selective drive gear may be caused to rotate with the intermediate shaft, whereby the lower drum shaft may be driven at different speeds, and means whereby the upper drum shaft is driven by one of the selective drive gears of the intermediate shaft.

2. A logging engine comprising a main drive shaft, an intermediate shaft, means by which the intermediate shaft may be selectively driven at different speeds by said drive shaft, a lower drum shaft driven by said intermediate shaft, and an upper drum shaft located over the main drive shaft and also driven through the medium of said intermediate shaft.

8. A logging engine comprising a main drive shaft, an intermediate shaft, a lower drum shaft, gears of different diameters loosely mounted on the intermediate shaft and constantly driven by the main shaft, means whereby the lower drum shaft may be driven through the medium of either of said gears, and an upper drum shaft located over the main drive shaft and actuated by one of said loosely mounted gears.

at. A logging engine comprising a main drive shaft, an intermediate shaft, a lower drum shaft, gear wheels of different diameters secured to the main drive shaft, loosely mounted gears on the intermediate shaft, a clutch member secured to the intermediate shaft between the loosely mounted gears, means for simultaneously moving both of said loosely mounted gears to connect either with the clutch member and to disconnect the other from said clutch member, means whereby the lower drum shaft is driven by said intermediate shaft, and an upper drum shaft located over the main drive shaft and driven by one of said loosely mounted gears.

In testimony whereof I have hereunto set my hand.

EUGENE D. ROBERTS.

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