US814105A - Timber-jack. - Google Patents

Description

PATENTBD MAR. 6, 1906.

J. M. WILLIAMS. TIMBER JACK. APPLIoATIoN FILED ooT.25.1so5.

WITNESSES UNITED STATES IOHN M. WILLIAMS, 0F sHALER PATENT OFFICE.

TOWNSHIP, ALLEGHENY OOUN TY,

PENNSYLVANIA.

TIMBER-JACK.

Specificationvof Letters Patent.

Patented March 6, 1906.

Application filed October 25, 1905. Serial No. 284,299.

My invention relates to timber-jacks or de-i vices for transporting heavy timbers, beams, or like articles.

To enable change of direction to be effected without lifting the timber and changing the position of the jack, the roller-frame is usually pivoted to the base, so that bythe use of controlling means or by swinging the timber any desired direction may be effected without readjustment of the jack. I provide new and improved means of pivotal attach# ment between the base and the roller-frame, i

whereby great ease of movement is obtained despite the Weight of the load. An annular flange is attached to the base, usually said ange being integral with circular metallic plate fixed on said base. The roller is supported onV standards arising from the opposite sides of a circular plate adjacent to the edge. Said circular plate is pivoted to said base and antifriction members interposed between the plate adjacent to its edge and said flan e on the base, a lip downwardly depending from the roller-frame plate encirclingsaid flange to protect the same from dirt or foreign matter. Means are provided for rotating the parts in relation to each other. It will be seen that the weight of the load on the roller is applied directly on the ball or roller bearings between the roller-supporting plate and the base, so that 'no binding or friction results.

In the accompanying drawings, Figure 1 is a plan view of my invention, the roller being shown upward. Fig. 42 is a vertical section of the same along the line 2 2 in Fig. 1, and Fig. 3 is a side elevation showing the wormgear mechanism.

The following is a detailed description of my invention as the same is illustrated in the drawings.

The base of my jack is preferably formed as a frame consisting of two longitudinal pieces 1 1 and cross-pieces connecting the same, 2 2. If desired, however, the said frame may be constructed of a single piece of heavy plank or other timber or may be constructed of cast or other metal.

' 3 is a metal plate bolted or otherwise secured to the base-as, for instance, by bolts 4 4, as shown. In case the base be of metal the said plate may be cast or made integral therewith, as desired. When the construction shown in the drawin s is used, I prefer to make my plate in the orm of an annular ring through which a bolt maybe passed. Around the edge of plate 3 I form a flange 6,upon the edge of which I provide a raceway 7 for the balls 8 8.

upon plate 3 and encircle the same by means of its circumferential flange 10, thus keeping out dirt and foreign matter from the raceways.

11 is a circumferential shoulder within the flange 10, which is provided with raceway 12, the complement of raceway 7. In the center of plate 9 I provide a countersunk aperture 13 for the bolt, either forming said' countersunk portion by stamping said plate, or, if said plate be' of cast metal, casting the same with said countersunk portion, as shown in Fig. 2.

14 is a bolt passing.v through plates 3 and 9 for a pivot and provided with nut 15 and washer 16, bymeans of which it may be the two raceways for proper action of the balls 8 8. If desired, I may change the crosssectional form of my raceways to allow rollerbearings to be introduced therein instead of the balls 8 8.

gral with or otherwise attached to the plate 9, adjacent to opposite sides thereof, as shown, between which is journaled the roller 18, of wood'or metal, as desired.

19 19 aretwo journal-lugs attached to the base, in which is journaled the shaft 20, having rigidly mounted thereon the Worm 21 and provided at one extremity with hand-wheel or other grip 22.

23 23 are a series of teeth attached to or made integral with the circumferential edge of plate 9 and of proper pitch and size to engage the worm 21. Said teeth may be provided around the entire circumference of the allow of desired rotation, as desired. I pre- 9 is an annular plate adapted to fit down' plate 9 or for only a sufiicient arc thereof t0v with spider-arms to form. central boss 5,

tightened to bring into proper conjunction 17 17 are two journal-standards made inte- IOO fer, however, to form them around its entire circumference. It is evident that by rotating the worm 21 the plate 9 and the mechanism mounted thereon will be rotated in the desired direction and to the desired degree.

The operation of my jack is as follows: If used in the position shown in Fig. 1, the jack is placed under the timber or other object to be moved and the same pushed along over the roller 18 in the desired direction. In case a change of direction is desired-as, for instance, a corner to be turned-the handwheel 22 is turned in the proper direction to swing the plate 9 and its roller 18 to bring the timber into the proper position for lthe desired movement. of the jack may be reversed when the movement is considerable and the base of the jack be placed under and in contact with the timber and the roller underneath traveling on the ground. lIn this manner any required distance may be traversed without the posi tion of the timber on the jack being changed longitudinally. Where the ground or road is hard enough to sustain the roller without sinking, this method is preferred.

If desired, the plates may be simply pivoted together, as shown, without antifriction devices being interposed, as shown; but I find that the use of the same greatly facilitates thev operation of my invention, and the location of the same adjacent to the edges of the plates gives a wide bearing-surface and enables the load to be sustained vertically without binding, as would be the case if the antifriction means were applied inside the standards 17 17 or omitted entirely. Any wabbling or lateral motion is thus provided against and prevented. Y

If desired, the worm mechanism may b omitted and the jack rotated by swinging the timber but as the weight is great I find that some such controlling and operating mechanism is highly preferable.

If desired, the position Although for the sake of clearness I have described the illustrated construction of my invention with great minuteness, I do not wish to be limited thereby, but claim, broadly- 1. In timber-jacks, a base, an annular plate attached to said base having a peripheral flange integral with said plate, a roller, a second annular plate supporting said roller, a lip integral with said second plate and adaptT ed to encircle said flange, raceways in said iiange and said second plate, antifriction members adapted to occupy said raceways and means for pivoting said second plate to said first-mentioned plate, substantially as described.

2. In timber-jacks, a base, an annular plate attached to said base and having a raceway adjacent to the edge thereof, a second annular plate pivoted to said first plate and having a downwardly-depending flange adapted to encircle the edge of said first plate, a raceway in said second plate adjacent t0 the edge thereof, antifriction members adapted to occupy said raceways, a roller, roller-standards attached to said second plate substantially in a vertical line with said raceways and means for rotating said second plate.

3. In timber-jacks, a base, an annular langed plate attached to said base, a roller, a plate supporting said roller and having an annular lip adapted to encircle vsaid flange, pivotal connection between said plates, teeth on the exterior of said lip and a worm member carried by said base and adapted to engage said teeth, as and for the purpose described.

Signed at Pittsburg, Pennsylvania, this 18th day of October, 1905.

JOHN M. WILLIAMS.

Witnesses:

EDWARD A. LAURENCE, FRANK HARRIS.

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