US 470116 A
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Description (OCR text may contain errors)
No. 470,116. Patented Mar. 1, 1892.
l/VVENTOI? WITNESSES ATTORNEYS UNITED STATES} PATENT OFFICE.
FREDERICK FINSTERER, OF AVON, LIONTANA.
SPECIFICATION forming part of Letters Patent No. 470,116, dated March 1, 1892. Application filed August 14, 1891. Serial No. 4:02.598. (No model.)
To all whom, it may concern.-
Be it known that I, FREDERICK FINSTERER, ofAvon, in the county of Deer Lodge and State of Montana, have invented a new and Improved lVagon-Jack, of which the following, is a full, clear, and exact description.
The object of the invention is to provide a new and improved wagon-jack which is simple and durable in construction, very effective in operation, and arranged to automatically and securely lock the lifting-barin place to support the load.
The invention consists of certain parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.
Reference is to be had to the accompanying drawings, forminga part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.
Figure 1 is a sectional side elevation of the improvement. Fig. 2 is a like View of the same in a different position, and Fig. 3 is a sec- }ional plan view of the same on the linexwof The improved wagon-jack is provided with a suitably-constructed casing A, in one side of which are arranged suitable guideways B, in which is fitted to slide vertically the liftingbar 0, formed at its upper end with a rest D, adapted to engage the load to be lifted. On the inner side of the bar 0 are arranged a series of teeth E, adapted to be engaged by a lifting-hook F, pivoted on a hand-lever G, held on a pivot H, supported on a suitable bracket fastened to the casing A. On the underside of the hand-lever G is arranged a projecting lug I, adapted to engage the upper end of a lever J, pivoted at J in the casing below the pivot H for the hand-lever G. The lower end of the lever J extends into a notchK', formed on the top of a bolt K, fitted to slide transversely in suitable hearings in the casing A. The inner end of the locking-bolt K is adapted to engage the teeth E, so as to lock the lifting-bar O in position when supportinga load. when the lever G is pressed into a lowermost position, the lug I presses on the lever J, and the latter, acting on the bolt K, throws the latter out of engagement with the respective teeth E to permit of lowering the lifting-bar O. The lever J is also adaptedto be engaged by a heavy spring L, secured on the outer side of the lifting-hook F, a lighter spring N being secured on the inner side of the said liftinghook, as is plainly shown in the drawings. The lighter spring N serves to move the lifting hook or pawl F out of mesh with the teeth E when the heavier springL is outof engagement with the lever J. (See Fig. 1.)
The operation is as follows: When it is desired to lift the bar 0, the operator raises the hand-lever G, so that the lifting hook or pawl F- moves downward, being out of engagement with the teeth E by the action of the springN. In the downward movement of the lifting-hook F the spring L comes in contact with the lever J, so that the hook end of the lifting-hook F is pressed into contact with one of the teeth E, the spring N then being compressed, as is plainly illustrated in Fig. 2. The pressure of the spring L on the upper end of the lever J also securely holds the bolt K in contact with the respective tooth E, so that the bar 0 is firmly supported and locked in place by the said bolt in order to prevent downward movement of the said bar while supporting the load. I The operator then swings the lever G downward, so that the hook F rises and carries along the bar O, thus lifting the load. The upward movement of the bar 0 causes the next following tooth below the bolt K to engage the latter and shifts the same outward to permit the bar 0 to slide upward. The bolt K is moved back to its locking position on the downward movement of the lifting-hook F by the spring L of the latter pressing on the lever J, as above described.
Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a wagon-jack, the combination, with a hand-lever carrying a lifting-hook adapted to engage the toothed lifting-bar, of aboltadapted to be actuated from the said lifting-hook, substantially as shown and described. 7
- 2. In a wagon-jack, the combination, with a toothed lifting-bar fitted to slide and a handlever carrying a lifting-hook adapted to engage thesaid toothed bar, of a bolt fitted to slide and adapted to engage the said toothed .bar and adapted to be actuated from the'said lifting-hook, substantially as shown and described.
hand-lever and provided on opposite sides with springs of different strengths, a lever adapted to be engaged by the stronger spring of said lifting-hook, a bolt fitted to slide and engaged by the last-mentioned lever, and a lug held on the said hand-lever and also adapted to engage the said second lever, substantially as shown and described.
FREDERICK FINSTERER. \Vitnesses:
C. G. Brnnsnvn, WM. J. RICHARDS.