US560242A

US560242A - tilley

Info

Publication number: US560242A
Authority: US
Publication date: 1896-05-19
Anticipated expiration: 1913-05-19

Description

2 Sheets-Sheet 1.

(No Model.)

J. S. TILLEY &"F. O. LOVEJOY.

. I LADDER HOOK. No. 560,242. Patented May 19, 1896.

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J. s. TILLEY & F. 0'. LOVEJOY. LADDER HOOK.

No. 560,242. Patented May 19, 1896.

WTNEEEIES EN'fi'JFKS ANDREW RGRAHAM. PHOTO-Limo. WASHINGTOILD c NITED STATES ATENT DFFICE.

JOHN S. TILLEY, OF VEST TROY, AND FREDRIO C. LOVEJOY, OF ALBANY, NEW YORK; SAID LOVEJOY ASSIGNOR TO SAID TILLEY.

LADDER-HOOK.

SPECIFICATION forming part of Letters Patent No. 560,242, dated May 19, 1896.

Application filed December 13, 1895. Serial No. 572,083. (No model.)

7 To a whom it may concern:

Be it known that we, JOHN S. TILLEY, of the village of West Troy, and FREDRIO O. LOVEJOY, of the city of Albany, county of Albany, State of New York, have invented a new and useful Improvement in- Ladder- Hooks, of which the following is a specification.

Our invention relates to improvements in that class of devices which are termed ladder-hooks and which are used to connect and secure ladder lengths or sections when raised and operated to slide along one over the other, with the hooks adapted to hook into the rounds of the stationary ladder lengths automatically, and thus connect the lengths for use. As heretofore made these devices have been constructed with a hook which at its lower end was pivoted, and was provided with a leaf-spring, which engaged with the side of the hook to force the same to run over the ladder-rounds when the length to which the hook was attached was raised until its upward movement ceased, when it would engage with one of the rounds of the stationary length and be held in place by a detent or dog. As the leaf-spring employed to actuate the hook was exteriorly placed, it would in handling the parts become injured and unreliable in its action. To remedy this condition, we place the pivoted end of the hook within an inclosure and arrange upon the pivot of the hook a coil-spring having tangent ends 11 2*, the latter of which will as the hook is moved on its pivot engage with the inclosure and the other end with the pin 19 on the hook, and thus make its action more prompt; and to make the inclosure containing the pivoted end of the hook durable and permanent in its connection to theladder side we construct it in a peculiar manner, which will be more fully set forth hereinafter.

Ve are aware also that ladder-hooks have been constructed to have their pivoted ends within an inclosure and provided with a tubular shaft or pivot on which to turn against the force of a spring encircling the tubular shaft, with one end of said spring arranged to engage with a rib on the inclosure interior and the other end with a projection on the hook interior, with said ladder-hook secured through the tubular pivot or shaft on which the ladder-hook could turn and by means of spurs formed on the inclosure sides, which spurs were driven into the wood forming the ladder sides.

methods of construction the ladder-hook is arranged in part within an inclosure which attaches to the ladder sides by means of screws, with the front body part and the back plate of the inclosure constructed to receive and retain the screws for their attachment to each other and the ladder front, as will be more fully set forth hereinafter, with the ladder-hook pivoting within the inclosure upon a two-part pivot-pin, one of each part of the latter being formed upon and projected inwardly from the bottom and top plate of the inclosure, the convex end of one part of the pivot-pin entering the concave end of the other pivot-pin part, to thus produce the pivotpin on which the ladder-hook journals or pivots.

Accompanying this specification to form a part of it there are two plates of drawings containing eight figures illustrating our invention, wit-h the same designation of parts by letter reference used in all of them.

Of these illustrations, Figure 1 is a front View of parts of two ladder lengths or sections containing our improvement. Fig. 2 is an elevation of one of the ladder-lengths sides, taken upon its inner side, with the movable length shown as being raised, with the hook and dog overrunning the ladder-rounds. Fig. 3 is another view of the same parts taken upon the inner side, the ladder parts connected by the engagement of the hook and dog with one of the rounds. Fig. 4 is a side View of one of the slides where attached to one of the ladder parts. Fig. 5 is a side elevation of one of the slides shown as detached. Fig. 6 is an edge view of one of the slides shown as detached. Fig. 7 is a longitudinal vertical section taken through the inclosure and pivot-pinion on which the hook is hinged or journaled, with the latter and its spring shown in side elevation. Fig. 8 is a section taken on the line 00 x of Fig. 7.

The several parts of the apparatus thus to the ladder by means of a bolt passing In our improvements upon these older illustrated are designated by letter reference and the function of the parts is described as follows:

The letters L designate the stationary ladder part, Z its rounds, and Z its sides.

The letters L designate the sliding ladder part, and Pits rounds or rungs, and Z its sides.

The letters S designate a slide of which there is one attached to each side of the sliding ladder parts L Each of these slides is provided with an offset end plate .9 having ears 6 and screw-holes 6 by which screws may be used and by which it will attach to the side of the sliding ladder part, and by means of its ends .5- s and its side .9 to form a slideway s for the reception of one of the sides of the stationary ladder part, in which slides the sliding ladder part may be raised or lowered.

The letter 0' designates a stiffening-rib applied to the exterior of each of the slides.

The letter II designates a hook of which there is one at each side of the sliding ladder part, and which is made with a hook proper, 72. on its upper end, with a shank ha, and at its lower end 7r the shank is journaled onto a pivot its, on which connection said hook may at its upper end swing inwardly and outwardly.

The letter N designates a rib encircling the lower end of the hook-shank where pivoted or journaled, and the letter I a spring having two tangent ends 2 i between which latter the said spring is coiled around the pivot-pin h, and at its lower tangent end i this spring, passing through the rib N, engages with the side of the inclosure E, while the upper tangent end i of the spring bears against a pin p projected from the shank of the hook, as shown at Figs. 7 and 8. As thus constructed when the hook is moved outwardly on its pivotal connect-ion it is so operated against the force of the spring I.

The letter D designates a dog or detent which is pivoted to the shank 7L3, and below where pivot-ed it is provided with a stop-pin p and at its upper end is constructed with an angular head (1 As thus constructed, this dog being heavier at its lower end below where pivoted than its upper end, it will move with the hook, and when the sliding ladder part is being drawn downwardly the dogs will cause the hook to override the rounds of the stationary ladder part, and when the sliding ladder part is raised thehooks will swing inwardly, so as to have the hook proper of each of them embrace the rounds, while the dogs will at their angular ends swing in beneath the rounds which the hooks have grasped.

The inclosure E is formed in two parts-a bottom plate 6 having ears a at its ends for attachment by means of screws, and a body part a, made with ears 6 at its sides for the passage of screws through the body part and the plate 6 for connection to the ladder part L and provided with the opening 0 in its upper end. To facilitate the insertion of the hook and spring within the inclosure E, the hinging or pivot pin h is made in two parts a a one of them (indicated at a) being formed on the inner side of the body part c and the part a on the plate part c, with the ends of the pivot where meeting within the inclosure having the part a concaved and the part a convexed, as shown at Fig. 8. As thus made the parts are easily connected, are made durable as to wearing, and positive in their action.

Having thus described our invention, what we claim, and desire to secure by Letters Pat-- cut, is

1. In an apparatus for connecting a sliding ladder part with a stationary ladder part, the combination with the inclosure E, produced by means of a body part e having formed integrally therewith upon its interior face the pivotpin part (0 provided with a convex inner end, and the bottom plate 6*, having formed integrally therewith upon its interior face the pivot-pin part a, having a concave inner end, with said body part and bottom plate adapted to connect with each other, and with the sliding ladder part by means of screws, with the inner ends of the pivot-pin parts entered one within the other, substantially as described; of the hook II, having a stop-pin 13 and provided with a C-forni rib N, on its outer face and adapted to journal on said pivot-pin within said inclosure; and the spring I, arranged to encircle said pivotpin inside of said rib, with one of its tangent ends in contact with said pin 13?, and the other tangent end in engagement with an opening in the inclosure bottom, constructed and arranged to operate, substantially in the manner as and for the purposes set forth.

2. The combination with the body part 6 provided with ears a and the pivot-pin part a of the bottom plate 6 provided with cars 6 and having integrally formed on its inner face the pivot-pin part a, with said body part, and said bottom plate adapted to connect with each other, and with the sliding ladder part by means of screws, with the inner end of one of the pivot-pin parts entering the other, substantially as described; of the hook II, having the stop-pin 1.1 on its shank, and at its lower end adapted to journal on said pivotpin; and having on its outer face the C-form rib N 5 and the spring I, encircling said pivotpin inside of said rib, with one of its tangent ends in contact with said stop-pin, and the other end engaging with and opening in the body part, substantially as and for the purposes set forth.

3. The combination with the body part 6 provided with cars 6 and the integrallyformed pivot-pin part 0?, of the bottom plate provided with cars 6 and having the integrally-formed pivot-pin part a,with said body part and said bottom plate adapted to connect with each other and with the sliding ladder part by means of screws, with the inner end of one of the pivot-pin parts entering the other, substantially as described; of the hook H, having the stop-pin 19 on its shank, and at its lower end adapted to journal on said pivot-pin; and having on its outer face the C-forrn rib N; the spring I, encircling said pivot-pin inside of said rib, With one of its tangent ends in contact with said stop-pin and the other tangent end in contact with the body part; and the dog or detent D, pivoted to the shank of said hook and having a counterpoise at its lower end, substantially in the manner as and for the purposes set forth.

4:. The combination with the ladder parts L, L, of the slides S, S, each having an offset plate s made with laterally-extended ears (2 having screw-holes a made therein,'for

June, 1895, and in the presence of the two 25 Witnesses Whose names are hereto Written.

J NO. S. TILLEY. FREDRIO C. LOVEJOY. Witnesses:

GEO. M. PAYFER, W. E. HAGAN.