US1795548A - Timber jack - Google Patents

Description

March l0, 1931. v FAZIO 1,795,548

- TIMBER JACK l Filed Nov. l. 1928 2 Sheets-Sheet l *s a k nf D fh m @Haring V. FAZIO TIMBER JACK March 10, 1931.

Filed Nov. 1. 1928 2. Sheets-Sheet 2 wg n b l am l ma @Hornung v Patented Mar. 1o, 1931 Y 1,795,548

UNITED STATES PATENT ori-#ICE VINCENZO FAZIO, or scRANToN, PENNSYLVANIA TIMBER .TACK

Application led November 1, 1928. Serial No. 316,587.

This invention relates to new and useful lar bar 5 closed at its lower end and adapted improvements in timber jacks primarily to be arranged at the lower end upon the adapted for use in mines, tunnels, pits and licor of the tunnel or mine as illustrated in the like and aims to provide a simple, useful Figure 1. The upper end of this tubular 5 and convenient means for elevating timbers bar isopen and the bore at the upper open 55 to the roofs of mines, tunnels, pits and the end is of reduced diameter and'provided like. with internal Vworm threads 6. Threaded An important object of this invention reinto the tubular bar 5 at the upper internally sides in the provision of a jack of this charthreaded end thereof, is a solid worm bar acter that may be securelyretained in sub- 7, the upper end of which is provided with G0 sta-ntially vertical position within a mine, an enlarged hea-d 8 having a cross turning tunnel or pit regardless of the height of the handle 9. 4 Swivelly mounted upon the uptunnel or pit, and that when once secured in per end of thissaid head 8 is a mine or tunnel position will be so retained in a rigid manceiling engaging member 10 so as to permit ner in order that the timbers may be quickly the solid bar 7 to be rotated to force this raised without any liability of the jack slipmember into engagement with the ceiling, ping from position, and the lower end of the tubular bar 5 into vWith the foregoing and other objects in engagement with the floor of the mine so as view as the nature of the invention will be to Securely retain the ack in relatively verbetter understood, the same comprises the tical and rigid position between the said novel form, combination and arrangement floor and ceiling. of parts hereinafter more fully described, Opposite si-des of the hollow bar 5 adjashown in the accompanying drawings and cent the lower end thereof are formed with Claimed. relatively wide dove-tailed channels 11-11,

In the drawings wherein like reference which receive the opposite dove tailed side characters indicate corresponding parts legs of a somewhat elongated and U-sha-ped throughout the several views: cable drum holder 12. Rotatably mounted Figure 1 is a` side elevation of my imbetween the free ends of the legs of this n proved timber jack as actually in use. carrier 12 is a double cable drum 13 formed Figure 2 is a detail longitudinal section. centrally with a ratchet vgear or wheel 1l, SU Figure 3 is an enlarged view partly in and an annulus 15 formed at its periphery elevation and partly in cross section of the with spaced sockets 16V for the reception of timber receiving end of the lifting arm that a drum rotating handle 17. comprises an essential feature of the jack. Pivotedlto the hollow bar 5 directly above Figure 4 is an enlarged horizontal section this drum is a ratchet dog 18 for engagement '55 through the lowerV tubular member of the with the teeth ofsaid ratchet 14 to prevent jack looking in a downward direction. rotation of the double drumin an unwinding Figure 5 is a section through the cable direction. i drum holder taken substantially upon the Adjacent the upper end of this hollow bar line 5 5 of Figure 4, and looking in the 5the same opposite sides thereof are provided 90 direction of the arrows, and ywith additional d ove tailed channels for re- Figure 6 is a somewhat enlarged section ceiving the dove-tailed side legs ofasometaken through the jack directly above the what elongated U-shaped larm attaching ,W lower stationary tubular member thereof bracket 18. rPhe free ends vof the side legs i and looking downwardly thereon to illustrate of this bracket 18 are at the opposite sides 95 the guide means for a pair of cables that are of the tubular bar 5 from the freel ends lof employed in conjunction with the present said cable drumholder 12, and pivoted there-l deviee. between is a somewhat elongated lifting arm Now having particular reference to the 19. The free end of this arm 19 is provided drawings, my novel jack consists of a tubuat the outersurfacevof the arm with a timber m0 receiving notch Q0, and in order to retain the timber' A therein an elongated set screw 21 is threaded through the arm and adapted to be turned inwardly for engagement with the timber as clearly illustrated in Figure At the upper end of the tubular bar 5 and at opposite sides thereof are spaced plates or tongues .Q2-22 between which are arranged cable guide pulleys 28, the center pulley being disposed somewhat above the two endmost pulleys as clearly illustrated in Figures 1 and 2. In the back of the timber receiving notch ot the lifting arm 19 and adjacent opposite sides of the arm are tongues Q4 to facilitate the attachment of a pair of cables thereto, these cables extending upwardly and being trained over the guide pulleys 23 at opposite sides of the tubular` bar 5. These cables are then extended downwardly toward the double drinn 13, and are associated with the opposite ends of the drum so that when the drum is rotated by manipulating the handle 17 these cables will be wound upon the drinn for obviously elevating the lifting arm 19 to the desired position such as is shown by the dotted lines in Figure l, this raising of the arm obviously elevating the timber A so that the same may be secured in position upon the mine or tunnel ceiling.

In view of the foregoing description when considered in conjunction with the accompanying drawings it will be apparent that l have produced a novel, simple and useful timber jack that is well adapted for all the purposes heretofore designated. Even though I have herein shown and described the invention it is to be understood that minor changes may be made therein without departing from the spirit of the invention and the scope of the appended claims.

Having thus described the invention` what I claim as new and desire to secure by Iietters Patent is l. In a timber jack ot the class described, an adjustable length standard adapted to be secured in relatively vertical position within a mine, tunnel or the like, a lifting arm piv` oted at one end to said standard, said arm at its free end being provided with a timber receiving notch, and means carried by said arm at said free end for engagement with the timber in said notch for retaining the timber in said notch, and manually operable means movably connecting the arm and said standard whereby the arm may be raised.

2. In a timber jack of the class described, an adjustable lengthstandard adapted to be secured in relatively vertical position within a mine, tunnel or the like, a lifting arm pivoted at one end to said standard, said arm at its other end provided with a timber receiving notch, a. bolt threaded through said arm at said one end for engagement with the timber in said notch, manually operable means movably connecting the arm and said standard whereby the arm may be raised, said means consisting of' a drlnn mounted for rotation adjacent the lower end ot the standard, a cable connection between the arm and drum, and'guide means adjacent the upper end of the standard over which said cable is arranged.

3. In a timber jack of the class described, a pair of telescopic members combining to provide a jack standard, manual means whereby the members may be moved inwardly or outwardly to facilitate the rigid arrangement of the standard at a substantially vertical position within a tunnel, mine, or the like, a hitting arm pivotally associated at one end with said standard, said arm at its free end being provided with a timber receiving notch, a bolt threaded through said arm at said free end for engagement with the timber in the notch .for retaining the timber within said notch, and manually operable means connected to the lifting arm whereby said lifting arm may be swung upwardly for raising the timber toward the ceiling of the mine or tunnel.

4. In a timber jack of the class described, a pair of telescopic members combining to provide a jack standard, manual. means whereby the members may be moved inwardly or outwardly to facilitate the rigid arrangement of the stand ards at a substantially vertical position within a tunnel or mine, a lifting arm pivotally associated at one end with said standards, said arm at its outer end being provided with a timber receiving notch, a bolt threaded in the last mentioned end of said arm and having one end extending into said notch for engagement with a member arranged therein, a series of pulleys mounted on one of said members, a drum rotatably mounted on the side of one of said members oppositie to the lifting arm, cables connected to the outer end of said arm and trained through said pulleys and engageable with said drum whereby said arm may be moved on its pivot, and means connected with said standard and engageable with said drum for locking the latter against casual rotative movement.

In testimony whereof I affix my signature.

VINCENZO FAZIO.

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