US 2503018 A
Description (OCR text may contain errors)
April 4, l950 R. c. WITTMAN 2,503,018
com: EXTENSION DEVICE Filed Aug. '7. 1946 INVENTOR Richjd C'. With/ryan ATTORNEYS Patented Apr. 4, 1,950
UNITED STATES PATENT oFFlcE n 2,503,018 CORD EXTENSION DEVICE Richard Wittman, Emporium, Pa. Application August 7, 1946, Serial No. 688,889
This invention relates to new and useful improvements in extension cord holders and has especial reference to a device for use in connection with cords of the nature of electric cords and air hoses used in garages and may also be used for water and gas hoses for the furnishing of air and gas to owners of automobiles.
The invention constitutes an improvement over my previous Patent No. 2,280,680 and an object of the invention is to provide a simple and more eiicient arrangement of pulleys to double the possible extension with the same distance of travel of the pulley carriage as well as to increase the ease with which the device may be operated.
A further object is to provide a simple and efcient device in which the slidable pulleys can be moved along their track with a minimum of effort and friction, and maintain their proper relation at all times.
A further object is to provide a device in which the parts may be disposed for proper operation regardless of the angularity of the wall or surface to which they may be attached.
Further and more specic objects, features and advantages will more clearly appear from a consideration of the specification hereinafter set forth especially when taken in connection with the accompanying drawings which illustrate a present preferred form which the invention may assume and which form part of the specification.
In brief and general terms the invention includes a frame comprising upper and lower brackets adjustably disposed with respectto the supporting surface, a pair of guide elements supported by and extending between the brackets, two xed pulleys at the top of the frame, two slidable pulleys at the lower portion of. the frame and slidably related to the guide elements and means to enable the movable pulleys to engage the guide elements with a minimum of friction. To facilitate ease of operation and reduce strain on the cord. rope, or hose all the pulleys mentions are disposed and move in the same plane. More particularly the device includes a pulley frame supporting two pulleys, and related to the guide rods or pipes, the pulley frame having pairs of rollers disposed on opposite sides of each pipe to bear against the same and permit sliding movement of the frame up and down the pipes with minimum friction while keeping the pulley frame in proper angular relation at all times.
`The present preferred form which the invention may assume is illustrated in the drawings of which,
Fig. 1 is a side elevation of the device;
Fig. 2 is a plan View of the device;
Fig. 3 is a side elevation of the travelling pulley carriage;
Fig. 4 is a plan view of said carriage;
Fig. 5 is a cross section taken on the line 5-5 of Fig. 3;
Fig. 6 is a cross section taken on the line 6 6 of Fig. 3;
Fig. '7 is a cross section taken on the line I-1 of Fig. 3 showing the weight plates attached; and,
Fig. 8 is a perspective view of one of the weight plates.
The present preferred form of the invention is shown in the drawings and comprises a simple and efficient means for supporting a flexible cord II] such as an electric cord or air hose used in garages, or any other flexible connector. This cord IU is adapted to pass over two fixed pulleys II and I2 and over two movable pulleys I3 and I 4 all of which are disposed in the same plane. these pulleys are associated with a supporting frame construction which comprises U-shaped bracket members I5 and I6 made of formed strips of metal and the top and bottom of the device. The upper bracket has an extension I'I to support the pulley II whereas the lower bracket I6 has no such extension. Between the brackets I5 and I6 extend the vertical guide members I8 andV I9 in the form of pipes. These pipes are rigidly" held in connection with the brackets I5 and IiiA in the corners thereof by being welded in place. To the opposite sides of the pipes is welded a bar' 20 from the top of which rearwardly extends a flat metal extension strip 26 having a hole 21 through which the cord I0 passes and in which it may be fastened by any suitable positioning means (not shown).
The extension bracketv I1 is adjustably fastened to the main bracket I5 by means of bolts 22 and 22. The latter also connect the main bracket I5 with supporting legs 39 and act as points around which the bracket I5 may be swivelled with respect to the legs 39 so that the legs may be set to meet the wall 23 squarely even when said wall is not'vertical. The legs 39 are suitably bolted to the wall 23.
`The outer pulley II is supported between the side plates of the extension bracket I'I in any desired manner. 'The other Xed pulley I2 is supported on a bolt or shaft 24 passing through the pipes I8 and IS just below the upper bracketv I5. Spacer sleeves 25 are employed to properly dispose the pulley in position. On each side of the pulleyl I2 are disposed circular shaped guard plates 2I the free ends of which are fastened to the bar 20 and the base of the bracket I5 is shown in Fig. 2. These guards prevent the cord from slipping off the pulley I2. It is to be noted that the lower bracket I6 supporting the lower ends of the pipes I8 and I9 are connected to the pipes in a similar manner to that above described and is connected to lower legs similar to the legs 39 so that they may be connected t0 the wall in the same manner.
The two l`ower movable pulleys I3" and I' are mounted on shafts 28 and 29 journalled between frame plates 3c and 3I. At their mid-portions* these plates have vertical straps 32 andi 33' with` upper and lower portions .provided with stub shafts such as 34 supporting pairs ofP` roller 35 on opposite sides of the respective. guide pipesI I8 and I9. In this manner the frame supporting., the lower pulleys is held in proper angularv posiif tion at all times while being able to slide up and down the pipes L8: and. I-9.l with. a, minimum of .friction regardless c12- the\ angular disposition oli the.. pipes; It'v is'1 also; to' be noted thatfrthe upper and lower ends of the straps 3?.: andi 3.31 are bent outwardly-'asi at' 59' (Iseeigr) so asto limit the movement. or thee frame within'.- the pipes I8 and I9 in a plane at right angles: to; plane of. movementingwhich; the-1 frame is limited by the rollers 34 and 35. Therefore thev frame: is guided' and. limited; in; movement in two right-angled.planessas.described;so:thatrits move.- mentg. is regulated andy thel frame; is-v always, lield within limits as to any movement except along: thea pipes. Ia' and I;9:. Thai-rame plates 3G,- and 3-Ia are;pr.ovidediwitlra serie-sauf holes. Seto re.-y ceivle` screws l of bolts; whereby` extra. weight plates: 38: may be attached; toi the outsidemi the plates: 3l).` and 3d: wllreneven` itis desiredtc increase: thee weiglitiof: the sliding frame for the.lowen'pulllays;,y Aszshownin.Figs'-. 4l toA4 7; inclusive; the: lower: pnlw leysf may.` have spacing. washersl 3,1; disposedl. to: maintainl them.'r spaced: from; nubbingf; against; ther framecplatesfl and Sllif: desired;
In: the; operation; of; the device, the: brackets- I5..- and I: are adjusted as.- desired! With.: respecttothe; surface 23;. inthe-upper: portionLofthe-'de- Vice, are thetwo fixed pulleys, and at the lower; portion ozthez'device arethatwmmovabie pulleys; slidable along; the guide elements on pipeszan'di providedwvith means' to enable this'. sliding mo:-
tion; to; takeplacei` with minimum?. orr friction; and; the; gmatest oit' ease'. andl to;I allow.- twiceA as.. muchrcord to be: extended fon givenLmovem'entf. of the; pulleys; frame :as in: previous; demices The? weightL oi theslidable; frame can` be' varied." by: means.: of:Y auxiliary` weight'. plates: tov be add'edi to'ortakenlfromithe frame as desired.. The' fact. that the pulleys areaafllj disposed and=moveairrthesame plane. permits: easier: operation: withl less strain on the :partsand 4with*practically nozlaterall thnust due to. the; hoses passinffs fromcne; plane:
Thispconstruction; givesia simple, eiectiver unit?. which: enables. the; cordv to; have, much. greater: extension,. holdsA it.: ini proper: position. witltiout'I snarling andzyet allows.: it tor be A pulled: out with? ease in view of theernatureeof the;unimi-pulley arrangement Italsopermits a-:much longerscord extension and-l allows. movement;- of: the; pulley? frame with. easei andiwithoutijamming.
While theginvention has been describedjin detail; and withrespect: to. a present preferred: form; which the :invention: may I assume,.,it, isznotito be. limited. to such detailsa. and.` form; since many; changes and modifications; may be madefinxthe invention without departing from the spirit and scope of the invention in its broadest aspects. Hence it is desired to cover any and all forms and modifications of the invention which may come within the language or scope of any one or more of the appended claims.
What I claim as my invention, is:
1. A device of the class described which includes upper and. lower brackets disposed on a supporting; surface, a pairf of. guide. elements supported by and extending between said brackets and spaced from said surface, two fixed pulleys disposed at the upper portion. of the device, a pair. of slidable pulleys disposed at the lower portion of. the device, all of said pulleys disposed and movable in the same plane, a irame supporting sa/idslidable.'A pulleys, and means on the frame to engage the guide elements to hold the frame in proper angular position..
2. A device of the class described which includes upper` and`r` lower brackets# disposed* on a supporting surface,- an extension to the`4 upperl bracket", al pulleyxedly disposed on said exten sion a pa-i'r of guid'eel'eme'nt's supported by and" extendngfbetween said brackets, a second'A pulley* fixedlyf disposed betweensaid:l guide elements near' the top there'o a= pulley frame disposed between' said guideielementsi a paircfpulleys disposed on said. frame, alli of"sa`idpulleys' disp'osed'- and' mov able in` the samel plane, roller means on saidl iframe' andiv arranged in :pairs toA engage' opposite' sides off" each guide element to guide theY frame` inf its slidingY movementA up'- and down betwee'n said elements;
3; In' a` device oith'e class' described', a uesliap'ed bracket plate;. aA pair of`v` guide elements disposed inthe-corners of said't U-sliaped plate, a/bar'conh n'ect'ed. t'o the opposite' sides o`f-` saidguide" ele'-` ments, an extension strip on sai'dbar and extend? ing' tow-ardz the open' endv oi-` the' U`shap`ed plata. saidlextensicnistrip having arr apertureto` receive' a4 cord to' be' supported A r 4. In a device ofthe-class described?y whi'cl'rcom`-`4 prises upper andlower' brackets; a pair oi guide elementsext'endingfbetween sai'dbrackets; a? pulL leyfkedl'y' disposed be'titfee'n-A said guide 4elenl'ents. neary the t'opy thereof-j curvedI strip'- like guard.1 plates`- disposed"- on opposite slde's of said5 pulley; said? guardI plates supported froml the upper 1 bracket-andisaidguideY elements.
5i Ina devicef of tileclass described which'includes supper an'dl'ower'braclets, a pair of guid elements extending'between' said brackets', a pulx` ley/frame disposed between'- saidA guide elen'rentsgV roller means fon s'a'i'd'ifram'eand'larrangedin pairs; ttpengage'- opposite' sides`- of each-l guide element" to'- limitvthe-motionoi' the frame in' one plane', and? outwardly bentlflange'son` said-frame'to eX- tendtowardthedidier-"surfacesv of sai'dguid'e' ele*- mentsfto iimitttne movement ofsaid frame in" another-plane ati-right angles to' the'flrst' men'- tioned planes.
RICHARDS: Wi'l'irMANi REFERENCES"A CITED."
Tl'ie`followingreferences are of recordii'rte l'eof this patenti` UNLTED, sfcAtrEs. PnfDISNfrs.L
McKissicls .Mari .22 .1932`