US451411A - peterson - Google Patents

Description

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T. PETERSON. GYMNASTIG APPARATUS.

No. 451,411. Patented Apr. 28, 1891.

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GYMNASTIG APPARATUS.

- No; 451,411. Patented Apr. 28,1891.l

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Patented Apr. 28, 1891.

ATTORNEY Nrrnn STATES P AfrnNr` Fries.

THEODORE PETERSON, OF AKRON, OHIO, ASSIGNOR TO THE IIOVARD MANUFACTURING COMPANY, OF SAME PLACE.

GYMNASTIC APPARATUS.

SPECIFICATION forming part of Letters Patent No. 451,41 1, dated April 28,1891.

Application filed February 13, 1891. Serial No. 381,296. (No model.)

To all whom t may concern:

Be it known that I, Trrnononn PETERSON, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Improvement in Apparatus forVertically Adjusting and Supporting Gymnastic Ladders, of which the following is a specication.

My invention has relation to improvements in that class of mechanical devices by which the sloping or horizontal ladders used in gymnastic exercises are raised or lowered to any desired elevation or angle and retained until a different position is required.

The objects of my invention are to provide new and improved devices for raising, retaining, and lowering the ends of said ladders; and to the aforesaid objects my invention consists of the peculiar construction, arrangement, and combination of parts, hereinafter described, and then specifically pointed out in the claims, reference being had to the accompanying drawings, forming a part of this specification.

In the accompanying drawings, Figure 1 is a perspective view of one form of my invention; Fig. 2, an enlarged central vertical section of a part of Fig. l; Figs. 3,4, and perspective views on the scale of Fig. l of modifications of the same; Fig. o, a central vertical section on the scale of Fig. 2 of a part of Fig. 4c; and Figs. 7 and 8, a perspective view and central vertical section on a different scale of a further modification of my invention.

In the different views there are certain* general features common to all and peculiar to my invention, and where these occur in the different modifications they are marked with the same letters of reference, but with progressive exponent marks for each successive modification,respectively,theadditional parts being marked with separate reference-letters, and hereinafter fully described and pointed out.

Proceeding to describe my invention, and referring to the form shown in Figs. 1 and 2, A A are two hollow metallic posts, as twoinch gas-pipe, fastened by means of flanges a a, parallel with each other and perpendicularly to the floor and ceiling, or other upper to its pivot, and arranged, when the outer end of the link is depressed, to engage the post and retain the sleeve, and when the outer end is rocked upwardA to release the sleeve and permit its movement along the post. The outer end of each link O is pivotally attached to the end of one of the side rails of the ladder D by a pivot or rod d. Near the upper end of each post A is an opening, in which is journaled a small grooved pulley e, over which runs a cord E, the outerend of which is attached to the inner end of the link O, the other end being attached toa weight F inside of the post. By this arrangement the weight of the ladder is constantly counterbalanced, thereby enabling it to be raisedwith little power.

Attached to the pivot-bar d is a cord G, which passes over an overhead pulley g, its other end being attached to the pivot b, that unites the links and sleeves to serve as a downhaul. By drawing the cord over the pulley g the end of the ladder is sufficiently raised to rock the outer ends of the links up and release the sleeves, which can be raised by continuing the draft or lowered by maintaining sufficient draft to keep them released, and drawing down 011 the part of the cord below the pivot b. NVhen the desired elevation in either direction is reached, the end of the ladder is permitted to fall, thereby locking the sleeves against the posts.

In the construction shown in Fig. 3 the weight-cord pulleys c e in the upper part of the posts A A face each other, and the cords E E', attached to the weights F F, running over them pass in opposite directions over a double overhung intermediate pulley 1 to one end of a lever H', hinged on the pivots b d. This lever extends in each direction beyond these pivots, and to its opposite end is attached the cord G', which, passing over the overhung pulley g is attached to the lsame end of the lever H. as the cords E E',

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to serve as a downhaul. The operation et this arri'tngement is the same with that shown in Fig. l, the weights F F serving through the cords E E' to counterbalance the ladder and the cord G to raise it, the office ot' the pivoted lever ll being to give these parts an additional purchase in their operation, or, in other words, to enable them to perform their respective functions with less power.

Figs. t and l5 present the same general construction shown in Figs. l and 2, except that the eounterbalanee weights, cords, and pulleys are omitted, and that to each sleeve B is attached a spring J, which constantly bears on the post A, and operates to throw down the end of the ladder Dl and lock the links C3 when the cord is released. This form is particularly adapted to light ladders where the weight is not so great as to require a counter-weight to assist in raising it. rlhe spring J can be applied to any of the other forms of construction shown and described in thisspeciiicatiombutit hasnot been deemed necessary to show it in connection with the others, as its application thereto will be obvious.

In Fig. 5 is illustrated another slight modification of my invention, which is similar to the construction shown in Fig. t, except that the springs Ji' shown in that construction are omitted and the lever H5 is employed. In this case, however, the cord G5, attached to the end et the lever Il, passing over the pulley y, hangs loose, and the cord E, passing over pulley Il, has both ends attached to the opposite end ot said lever, the one to assist with the cords G5 in raising the sleeves and the other to serve as a downhaul.

In operation the cord G is used, as in the other forms, to first raise the end ot' the ladder D5 sufieientl y to rock and release the links Cl", when, if it is desired to raise the sleeves D, the cords G5 and E are drawn in unison until the desired elevation is reached. The reverse operation will be readily understood from the description of the other terms hereinbefore described.

Figs. 7 and S illustrate the application oi' my invention when a single post is used to support theladders. In this modification the post A, sleeve B, link C, cords E G, pulleys e. y, and weight Fare substantially the same as the same relative parts in Figs. land 2; but in ordel' to insure stability of the sup port and prevent lateral sway of the ladder, the ends of the pivot d are bent downward from each side et' the link C at or near a right angle with each other, where they are united with the ends of the rails D" ot' the ladder, across which is a rod K", which constitutes a pivot for them, and which is rigidly connected with a ring 7c loosely mounted on said post. Frein the points el union of the ends of the bent pivotal bar t and the rod K are two rods L L, which extend inward and unite with a ring l, also loosely mounted on said post. 'lhe reds Il L maybe andare preferably integral with the vpivotal bar d". The operation ot this modification will be readily understood from the description ot the operation et the other forms herembefore detailed; but, in addition to the advantages of those forms, the ladder can be swung around the post, so as to stand radially from it at different angles.

Having thus described myinvention, what I claim as new, and desire to secure by Iletters Patent, is

1l. An apparatus for vertically adjusting and supporting gymnastic ladders, consisting of a vertical post, a sleeve arranged to slide thereon, and clutch mechanism connected with the sleeve and ladder and arranged to engage the post by the weight ot' the ladder, substantially as shown and described.

An apparatus tor vertically adjusting and supporting gymnastic ladders,"consisting ot a vertical hollow post, a sleeve arranged to slide thereon, clutch mechanism connected with the sleeve and ladder and arranged to engage the post by the weight of the ladder, and a counter-weight disposed within the post and connected with the ladder by a cord and pulley, substantially as shown and described.

3. In an apparatus forvertieally adjusting and supporting gymnastic ladders, the combination of a vertical post, a sleeve arranged to slide thereon, a link journaled in said sleeve, having an eccentric end arranged to engage said post when its outer end is depressed, and having its outer end pivotally connected with the ladder, and means, as a cord, for simultaneously raising the ends of said ladder and lilik, substantially as shown and described.

at. In an apparatus for vertically adjusting and supporting gymnastic ladders, the combination, with parallel posts and sleeves mounted and arranged to slide thereon, with links pivota-lly mounted therein and arranged to clamp said posts as theirouter ends are depressed, and having their outer ends pi votally connected with the ladder, of springs attached to said links, arranged to press against said posts and constantly depress the outer ends of said links, substantially as shown and described, and for the purpose specied.

5. In an apparatus for vertically adjusting and supporting gymnastic ladders, the combination, with parallel posts and sleeves mounted and arranged to slide thereon, with links pivotally mounted therein and arranged to clamp said posts as their outer ends are depressed, and having their outer ends pivotally connected with the ladder, 0f means, as a cord, for simultaneously raising the pivoted end of the ladder and links and similar means for lowering said sleeves when the ends of the ladder and links are raised, substantiall y as shown and described.

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6. In an apparatus for vertically adjusting and supporting gymnastie ladders, the @01nbination, with parallel posts and sleeves mounted and arranged to slide thereon,\vith 5 links pivotally mounted therein and arranged to clamp said posts as lheir outer ends are depressed, and having their outer ends pivotally connected With the ladder, of a lever, as H, mounted on the pivots of said links 1o and having` at one end a cord for raising the outer ends of said links and at the other a oord for lowering the same, substantially as shown and described'.

In testimony jhat I claim the above I hereunto set my hand.

THEODORE PETERSON.

In presence of- C. E. HUMPHREY,' C. P. I-IUMPHREY.

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