US2822896A - Collapsible device - Google Patents

Description

Fehll, 1958 w. SCHUSTER 2 COLLAPSIBLE DEVICE Filed April 8, 1952 2 Shee ts-Sheet 1 'INYEHT R', WILHELM Sci-15mg Feb. 11, 1958 Y W; SCHUSTERV 2,822,896

COLLAPSIBLE DEVICE Filed April 8, 1952 2 sheets-sheeiz f INVENTOR" WILHELM SnHUSIER United States Patent COLLAPSIBLE DEVICE Wilhelm Schuster, Vienna, Austria, assignor of one-half to Valentin Krause, Vienna, Austria Application April 8, 1952, Serial No. 281,229 Claims priority, application Austria February 23, 1952 Claims. (Cl. 189-26) This invention relates to a device which may be coiled and stretched.

The invention is based on the idea to form an element serving as a manual implement, a tool, carrier, support, or tension member, so that when out of use it may be coiled whereas for use it may be transformed into an article or element of construction which resists kinking and bending. I

In toy design it has been suggested to form the limbs of a doll of single elements lined up on a string and to load the elements by a spring to stretch by its resiliency the string, which may relax on the slightest counterprese sure. This leads to novel eflects in toys but does not provide a safe element of construction for lack of the necessary requirements, consisting in the provision of an inelastic stretching device, whichmay be stretched out rigidly.

In accordance with the invention the idea underlying the same is realized thereby that an inelastic, flexible carrier, which may be stretched out and has rigid end stops, is combined with a number of spacers, which when the carrier is relaxed are aligned with such play as to permit of bending the carrier in all directions, and with an inelastic stretching device for clamping the spacers against each other and the end stops whereby the flexible carrier is stretched and the spacers are transformed into a loadresistant, rigid rod.

This principle may be embodied in two different types. In one type according to the invention, the inelastic, flexible and stretchable carrier'consists of a rope, or another tension-resistant, flexible element, and the spacers consist of a number of compression members, which are lined up on the rope and may be pressed by the stretching device against the end stops of the rope, whereby the latter is stretched and the compression members are transformed into a rigid rod.

In the other type according to the invention, suitable particularly for high stresses, the inelastic, flexible and stretchable carrier consists of a flexible hose or the like, and the aligned spacers are a loose fit in this flexible hose and may be pressed against one another between theend stops by means of the "stretching device stretching the hose. a a a In the drawing several embodiments ofthedevice according to the invention are shown byway of example, in and out ofuse: y v w The first embodiment; consisting ofa cleaning rod, is shown in Figs. 1 and 2' in two views in positionfor use, and in Fig. 3, with the:cleaning instrument, in a relaxed position, outof use. I

Fig. 4 shows by way of example two of the spacers in longitudinal section.

Figs. 5 and 6 show two further examples of the invention, applied to-a tripod and a fishing rod, respectively, in diagrammatic .views.

Figs; 7 and 8 show parts of two'embodirnents of a stickin longitudinal section, the stretching .device'being in stretching" positionandrelaxed, respectively.

Figs. 9 and 10. show parts of anembodiment consisting 2,822,396 Patented Feb. 11, 1958 of a rod, forming an element of construction and composed of several tension members having spacers lined up thereon, in elevation and top plan view, respectively.

Fig. 11 shows a rod of varying cross section, forming an element of construction.

, Fig. 12 shows a spacer element, which consists of two parts that may be screwed one into the other to vary its length. Finally,

Figs. 13 and 14 show by way of example two embodiments of spacers having end faces including an acute angle with one another.

The stick shown in Figs. 1 to 3 consists of a tensionresistant rope I or another tension-resistant, flexible element of suitable material, anumber ofspacers 2 lined up thereon, astretching device 5, 6, two end stops 7 and 7a aflixed to the rope ends, and aspacer 8, 8a of adjustable length freely movably mounted on the rope, such as shown in Fig. 12, and formed of two parts which may be screwed one into the other. The stretching device may consist, e. g., of two' pairs of stretchingmembers 5, 6, which are jointed together in the middle bypins 9 and 10, and arepivotally connected bypivots 11 and 12 to anengaging piece 3 adapted to engage with the end stop 7,

and to a clampinghead 13. The pair of stretchingmembers 5 is somewhat shorter than the pair of stretchingmembers 6 so that when the stretching device is relaxed the rope I orthe like will be slackened by the whole length of the pair of stretchingmembers 5, as shown in Fig. 3. In this case theengaging piece 3 lies directly at the clamping head '13. Fig. 3 shows that when the stick is relaxed there will be a certain play between theseveral spacers 2, to provide between thespacers 2 suflicient space permitting of coiling the rope I together with thespacers 2, as desired. The total spacing between thespacers 2 corresponds substantially to the length of the rope part taken up by the stretching device. The tension of the rope and the force by which the spacers are compressed may be adjusted by thespacer element 8, 8a (Fig. 12).

To stretch the stick thestretching members 5, 6 are swung out toward both sides out of the position shown in Fig. 3 and theengaging piece 3 is pulled downwardly. Then the stretchingmembers 5, 6 form a jointed parallelogram, which may be gripped with two fingers at thejoints 9, 10 and may be compressed so that thejoints 9, 10 engage and assume a re-entrant position inwardly of the stretching zones (indicated by dash-and-dot connection lines) to be' secured against unintended relaxation. At the same time the rope 1 is stretched taut and underthe pressure of the clampinghead 13 thespacers 2 come close to each other. The taut rope I pulls with its end stops 7, 7a allspacers 2 firmly together so that a rigid rod of high resistance to kinking and bending is formed. Thesespacers 2 may be formed out of the solid, or may be pressed, stamped, or cast, of metal or a new synthetic material, e. g., a thermoplastic composition.

In accordance with Fig. 4 thespacers 2 may, e. g., be formed from a drawnsleeve 2 having astepped cap 14, which is conformed to aguide nozzle 15 providing acupshaped guide passage 16. The cup-shaped guide is drawn inwardly to the middle, i. e., the middle of thesleeve body 2 and curves outwardly at the end. Thus the rope passing through the cup-shaped guide passage 16 of .thecap 14 will engage thenozzle 15 at about halfthe length of thesleeve 2, which is thus given a theoretical pivot, about which it is movable in all directions, whereas it remains centrically aligned relative of theadjacent sleeve 2. The step on the inwardly drawncap 14 of thesleeve 2 provides a free rim embracing the cap of the.next sleeve 2 for a safe centric alignment therewith.- This shape of thespacer 2 enables the simple manufacture thereof from thin, compression-resistant material. and has the great advantage that it will not interferewith stretching the stick, whereas in the stretched conditionthelatten will have a perfectly smooth surface. It is also possible to make the section shown of solid material, with the exception of thecup-shaped guide passage 16, from a thermoplasticsynthetic compositiome. g.- Howeven the spacers may also beformed from a sleeve 'of:compression-resistant material, in combination with two rings or disks off synthetic material, which are insertedthereinand provided with centric bores. The essential feature is always to ensure the curvature of therope in therelaxed condition and the accurate relative alignment of the spacers livhen the stick is stretched.

A stick so constructed may be formed in: accordance with the purpose for which it is intended, as has been mentioned hereinbefore. Oneembodiment of the stick is shown in Figs. 1 to 3, discussed already. In thiscase one. end stop 7a of the rope l may form acleaning instrument, e. g., a cylindric'brush 17 (Fig. 3). Itisalso possible to form the en'd-stop' 7a as acoupling: member for such cleaning instrument 17; whichinthatcase may be coupled by screwing, hanging,.orfitting as withabayonet joint.- In this casethe stick. may beused for the cleaning of rifle barrels or all-types of tubes.

When the rod is to be used ina tripod, thestretching device 5, 6 is suitably arranged not at thefoot end, but, e. g., at-halfthelength of the tripod between thespacers 2. Fig. 5 shows a tripod constructedin that way. Fig. 6 shows a rod'forming afishing rod 18, which at its lower end has a handle 19,. out of. which thestretchingdevice 5, 6 protrudes, and has at the handle theusual reel for winding thefishingline. When the stick is hollow,- the fishing line may be passed through its cavity. This stick is curved... The curvature is achieved thereby that the end faces of-the'spacers are given an acute angle a, which depends on the radius of curvature. Thus the spacers forml short segments. To ensure that thesespacers 2 always remain in their proper position, they interlock, e. g.,. asshown in Fig. 13, bygrooves 28 andtongues 29, inthe stretched and relaxed conditions.

Another embodiment of the invention is shown in Fig. 11. This is an-element of construction, theresistance of which to bending and kinking is increased thereby that it is provided at a point of its length subjected to highest stress, e. g., in the middle, with spacers larger in diameter than those at the ends so that a conical or double-conical element of construction results, which may be subjected to loads much higher than'possible in the case of the previously describedemb odiments.

The second type according to the invention is shown diagrammatically in Figs. 7 and- 8. On principle this type differs from the first in: that: the element subjected to the stretching tension of the stretching. device isnot atension-resistant rope or the like, but atension-resistant, flexible hose 1, which is of higher tensile strength and, moreover, has the advantage that it loosely encloses thespacers 2 and permits of a distribution of the clamping pressure on thespacers 2 in a manner much more favorable than in the case of the tension rope I. This hose 1 may consist of tension-resistant fabric, wire mesh with or without covering or impregnation with a thermoplastic composition, rubber, or the like. It may also be formed out of a somewhat elastic material, such as rubber or a plastic synthetic composition, with or without flexible reinforcements. This hose 1 is closed on top bythe-end stop 7a, into which, e. g., an. adjusting. screw 8a may be screwably inserted to adjust the compression on thespacers 2. A clampingjsocket'21 holds the hose end firmly at the end stop 7a, Thespacers 2 may be formed of solid disks, rings, or sleeves, or compression-resistant material. Thespacers 2 may also be formed of the turns of aprofile wire 2, of metal or any other compression,- resist'ant material, which is helica'llywound and tends to open with relatively small resiliency to the normal lead. The wire profile :may be round or angular. It is also possible to wind hel'icall'y a compression-resistant strip having a stepped cross-sectional profile, e.-g., as used in gas hoses, so that the width of the strip exceeds the lead and the turns of the strip overlap with axial play by a certain, determinable measure.

The hose end facing the stretching device is clamped by a tapered clamping ring22- to-aguide sleeve 23, which carries the stretchingdevice andserves as a guide for thepush button 13 thereof and as a support for the stretchingmembers 5, 6.. The. longer. stretchingmembers 6 are pivoted at the eyes: 12 to I the: guidebody 23 and are jointedto theshort stretching members 5 bypivots 9, 10.

The shortstret'ching members are pivoted witheyes 11 to the ;c1amping;head 13;.which. consists of. a slide sleeve axially displaceable within theguide body 23 and has two eye lugs passing through twolongitudinal slots 24 of theguide body 23 for connection with theeyes 11 of the stretchingmembers 5. Theguide body 23 has in addition to thelongitudinal slots 24 two opposed.apertures 25 for the passage of the fingers, to permit of forcing the=stretchingmembers 5, 6 from the inside outwardly out of the stretchingposition. When thejoints 9, 10 are provided with springs having legs bearing on the stretching member-s5, 6.of'the stretching device, the stretching members may swing out automatically and assume a preparatory position as soon as they are removed by hand out ofthe:collapsed=positionshown inFig. 8 so that thereafter the joints:9. and 10 need. only to be pressed into the locking position shown in Fig. 7. The same applies to the collapsing of. the stretchingmembers into their in operativepositionc The.guidebody 23 together. with the stretching membersS', 6 f'ormsaconvenient handle, which owing'touitshollow construction may form together with annular spacers. a; conduit for liquids directly, or may be provided Witll'lSLlCll; conduit. E. g.',.a hose may be stifiened throughout. its length of part thereof by pressure exercised on. the stretching members.

As shown in Figs. 9;. 10 thespacers 2 may be provided with. a circle of 110165 27, by which they are lined up onseveralflexible tensionelements 26 arranged in a circle. In. this case thetension elements 26 are fixed at theend stops 7; 7aandthe clampinghead 13 and theengaging piece 3 of the stretching device are slidably lined up on thetension elements 26. In this embodiment of the device it is also possible to usespacers 2 having end faces. including an acute angle 0:, according to Fig. 14, to provide for a curvature of the whole device. If the spacers areprovidedwith a central bore, the entire device may be used as a support for an electric conductor, a tension string, or a hose.

Finally it may be mentioned that the invention is not restricted to theembodiments shown but may be embodied with manifold modifications. Even the features of the examples mentioned may be exchanged amongst each other; The followi'ngexamples may be given how the invention may be applied:

The device may be used as a baton, walking stick, slashingor pointed weapon, flagpole, e. g., for automobiles, as'tension rod for-the trailer, as make-shift support for all purposes, and in many other variations in conjunction with'tools. The stretching device may also comprise a cam or eccentric.

Reference is made to applicants U'. S. Patent No. 2,688,426, issued on September 7, 1954.

I claim: V V

1. A supporting rod comprising, in combination, a tension-resistant flexible elongated carrier means; aplurality of body members attached to said tension-resistant flexible carrier means, at. least two of said body members being arranged at and fixedly secured to the ends of said carrier means and" constituting end members, each of. said body members having opposite end faces adapted to abut against'adjacent body members, the total length of said body members in direction of said tension-resistant fiexible carrier means being shorter than the total length of said carrier means between said end members by a fixed distance; and manually operable spacing means mounted on said tension-resistant flexible carrier means between one of said end members and one of said body members thereon and having ends abutting against said last-mentioned two members, respectively, said spacing means including two end pieces and a pair of toggle levers pivotally connected to said end pieces, each pair of toggle levers including two pivotally connected toggle levers of different lengths, said two pairs of toggle levers being movable between an inoperative position in which said end pieces thereof are in direction of said flexible carrier means at a distance from each other which is shorter than said fixed distance and in which the two toggle levers of each pair of toggle levers are folded upon each other and extend in direction of said flexible carrier means, and an operative position in which said end pieces are spaced at a distance equal to said fixed distance whereby in said operative position of said two pairs of toggle levers said carrier means is held in stretched position by said body members and said spacing means, while in said inoperative position of said spacing means said body members are spaced on said carrier means so that the same is unstretched and loose.

2. A supporting rod as set forth in claim 1 wherein said carrier means is a string means secured to said end members of said body members, and wherein the other body members are annular and beaded on said string means.

3. A supporting rod as set forth in claim 1 wherein said carrier means is a tubular carrier means, and wherein said body members are arranged within said tubular carrier means.

4. A supporting rod comprising, in combination, a tension-resistant flexible string means having a predetermined diameter; two end members fixed to the ends of said string means; a plurality of body members, each body member being formed with a central passage having the same predetermined diameter as said string means, said passage flaring at both ends thereof, each body member being formed at one end thereof with a recess bounded by an annular transverse abutment face, each body member having at the other end thereof a central projection adapted to fit into said recess of an adjacent body member, each body member having at said other end thereof an annular transverse abutment face surrounding said central porjection for engaging the annular abutment face on said one end of an adjacent body member, said body members being beaded on said string means with said string means passing through said passages of said body members whereby the same are centered on said string means, the total length of said body members being shorter than the total length of said string means between said end members by a fixed distance; and manually operable spacing means mounted on said string means between one of said end members and one of said body members and having ends abutting against said lastmentioned members, respectively, said spacing means being constructed for manual adjustment between an inoperative position in which said ends thereof are in direction of said string means at a distance from each other which is shorter than said fixed distance, and an operative position in which the ends thereof are held at a distance equal to said fixed distance whereby during movement of said spacing means from said inoperative to said operative position, said body members slide on said string means until said projections thereof engage said recesses whereby said body members form a rigid body and said string means is held in stretched position, while in said inoperative position of said spacing means said body members are spaced on said string means so that the same is unstretched and adapted to be coiled with said string means being curved along said flaring ends of said passages in said body members, said spacing means including two end pieces and a pair of toggle levers pivotally connected to said end pieces, each pair of toggle levers including two pivotally connected toggle levers of different lengths, said two pairs of toggle levers being movable to a contracted position in which said end pieces thereof are located adjacent each other and in which the two toggle levers of each pair of toggle levers are folded upon each other and extend in direction of said string means, and an expanded position in which said end pieces are spaced at a distance equal to said fixed distance.

5. A supporting rod comprising, in combination, a tension-resistant flexible elongated carrier means; a plurality of body members attached to said tension-resistant flexible carrier means, at least two of said body members being arranged at and fixedly secured to the ends of said carrier means and constituting end members, each of said body members having opposite end faces adapted to abut against adjacent body members, the total length of said body members in direction of said tension-resistant flexible carrier means being shorter than the total length of said carrier means between said end members by a fixed distance; manually operable spacing means mounted on said tension-resistant flexible carrier means between one of said end members and one of said body members thereon and having ends abutting against said last-mentioned two members, respectively, said spacing means including two end pieces and a pair of toggle levers pivotally connected to said end pieces, each pair of toggle levers including two pivotally connected toggle levers of different lengths, said two pairs of toggle levers being movable between an inoperative position in which said end pieces thereof are in direction of said flexible carrier means at a distance from each other which is shorter than said fixed distance and in which the two toggle levers of each pair of toggle levers are folded upon each other and extend in direction of said flexible carrier means, and an operative position in which said end pieces are spaced at a distance equal to said fixed distance whereby in said operative position of said two pairs of toggle levers said carrier means is held in stretched position by said body members and said spacing means, while in said inoperative position of said spacing means said body members are spaced on said carrier means so that the same is unstretched and loose; a handle means secured to said spacing means; and a tool means secured to the end of said supporting device remote from said handle means.

References Cited in the file of this patent UNITED STATES PATENTS 385,356 Johnson July 3, 1888 870,429 Grimler Nov. 5, 1907 1,250,064 Whims Dec. 11, 1917 1,560,789 Johnson et al. Nov. 10, 1925 2,351,734 Backe June 20, 1944 2,379,577 Harsted July 3, 1945 2,381,588 Hall Aug. 7, 1945 2,510,198 Tesmer June 6, 1950

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