US2438887A - Automatic braking device - Google Patents

Description

Apl s, 194s.

`H. w. ALLEN AUTONUTICJ BRAKING DEVICE Filed Aug. 18, 1944 2 Sheets-Sheet 1 fm1 l F/GZ April 6, 1948. H. w.v ALLEN 2,438,887

AUTOMATIC BRAKING DEVICE Filed Aug. 18, 1944 2 sheets-sheet z` FIG. 6

Patented Apr. 6, 1948 2,438,887 AUTOMATIC BnAmNa DEVICE p Harry W'. Allen, Dayton, Ohio 1 Claim.

The invention described herein may be 'manutactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon. f

The invention to be hereinafter described relates to automatic brakes for reels.

There are a great number and variety of oice machines for reeling tape or ribbon-type sheets from spool to spool across a plate or table for receiving or sh'owing data of various kinds. The reeling or travel of the strip is intermittent, as is well understood, with frequent brief stops 'for one reason or another, according tothe use of the machine. In order that the strip may be properly used whether for supplying data by being read or for receiving data, it should be maintained straight, flat and relatively taut or under suitable tension. In machines of this class, as heretofore built, there has been no simple and practical means or `device for maintaining proper tautness or tension of the strip immediately following temporary stoppages. Instead, at every such stoppage there has been more or less over-run or unwinding `from thedelivery `or supply roll with corresponding slack, looseness and lack of tension in the strip. The objects of the present invention are to overcome the above and oth'er objections and provide a simple,- efcient 'and compact device for automatically minimizing all such slackness and simultaneously taking up any` slack not eliminated.

An important aim of the invention is to present an automatic brake device which is adapted to be produced at low cost, suitable for incorporation in conventional reeling and unreeling devices such as billing, order writing, manifolding machines and the like, without requiring extra space or special framing, by permitting its mounting upon usual side frame plates. It is also an aim to present such an automatic brake, which will be liable in a minimum degree to derangement or excessive wear in the use to be expected at sales counters, stock rooms and the like.

In order to more clearly disclose the construction, operation and use of the invention, reference should be had to the accompanying drawings forming part of the present application.

In the drawings:

Fig. 1 is an isometric perspective view showing the invention applied to a machine of the general character last mentioned above;

Fig, 2 is a left hand end view `oi? Fig. 1 enlarged;

Fig. 3 is an enlarged fragmentary side elevation, with the near side plate removed, showing Application August `18, 1944, serial No.,55o,11o f (Granted under the act of March 3, 1883, as amended April 30, 1928-; 370 0. G. '157) the relative position of feed, idler and rstguid rolls;

plied. It may be any one of a wide rangeiof:

standard and accepted machines in general use for reeling or winding strips or ribbons from spool,` reel or roll 3 lat one end of the machine across over a table or plate and onto another u spool, -reel or roll 2 atlthe opposite emi.` The spool laxes are journaled in the frame X` and slipped into and removed from place through slots 'side wall X of the machine.

I5, alllin well known manner. The receivinglroll 2 is driven through -a suitable gear train I6 from a small motor device I'I with the usual Istop-andgo switch I8 and speed control, not shown, .all as is well known. Transverse horizontal guide rolls 2|` are mounted at each end of theframe near, and at the level of, the table plate 20. Y i. vp i, `In* Figs. `3, 4 and 5, particularly, the construction, arrangement landvapplication of the invention in such machines is clearly illustrated., Y 1

,In the well knowntype of reeling machine `used, to illustrate the invention, the record'tape, strip, sheet, web or ribbon I, reeled on the receiving roll 2 is unreeled or delivered from feed roll 3. From roll 3 th'e tape is looped rearwardly down, behind, under around and upwardly from an idler roll 4 journaled in the outer swinging ends of the brake releasing side arms of a pivotally mounted or swinging U-yoke or frame 5. While this is the preferred construction, it will be understood that a single, or parallel separate arms or parallel connected arms may be used to carry the roll 4. From each side arm of the yoke or frame 5, at or near the lower pivoted end, eX- tends a short stub shaft or pivot 6 by which the U-yoke is pivotally journalled in the respective These pivots are close to the vertical plane of the shaft I9 of the roll 3, and the frame 5 swings freely back and forth across this plane below the roll 3 and its web load. Fixed to and movable with each pivot I (and consequently xed with the arms at 5) there is a short foot or lift cam or crank arm 1, for a purpose to be later disclosed. As sh'own in the drawings (particularly Figs. 3, 4 and 5), arm 1 with yoke 5 and pivot 6 present substan- Fi-g. 4 is an enlarged diagrammatic View of theautomatic brake mechanism in releasing position;. Fig. 5 is a like view in holding position; and` i.,

Fig. 6 is -a detail of the idler roll mounting and appreciable braking force, a spring I I is used, mounted on the wall X and'having an end press# ing downward on a pin set in the siderofthhr 8. As the tape, ribbon or the like is dratvvn tovy rd the receiving roll 2 when the motor'irat's y He latter, it will swing the id1er -,4 tovvaiglgtheireceiving roll 2, as shown in Fig.' L MI'riy vthaz'*position, as shown, foot 1 lifts bar 8 so that-ritslyke -9 is clear of drum Il), permitting free Lljunning ifeedmg action of rou a. onvsgiejsteiige, tension on the strip or ribbonisrhvdnd kus at?,

It is thought that the construction, operation and use of the invention will be clear from the l preceding detailed description.v

Many changes may be made in the construc- 5 tion,\ arrangement and disposition of the parts of the invention within the scope of the appended glailin without,tdepartingglrgin threeldof the inneitfsreantto mdegail :such within vemo t'lfsapplication vvhereibnly" one 'preferred form has been illustrated purely by way of example.

"Having thus `described my invention, what I "glairnggrrdglesire to protect by Letters Patent is:

An rautoinatic brake for intermittent web unreeling`-rolfls`comprising Ia rotatable reel shaft, a ifed onthe shaft, a support therefor, a brake ably/longitudinally on said support radially in I *relationtothfe drinn Kand having its medial line "i'latnggdina" adia'r-piane of the shaft and drum,

zo' aenoeyok rodi-fed on ine bar having an opening therein receiving the said drum loosely therewith'- in'saiu bpeningbeing" elongated in the direction or sliinpmovementioftnepar 'teclear the'durn at" tintes,4 resilihtfmans coenga'ged' lietween the support and brake bar tending-"to"apply'tlieshe i i' tce'th'e idrul'n in`e"direction^`of 'slid'ir'ifg'hrovenint of the bar, a brake'relase'arm pivotedadistance front saidA shaft and 'closelyadjacent:y said"fatiia1 planeofthe shaft; the free' endfoftheiarm'be'in'g 30` toward the shaftandv movable" tovva'r'dfan'd from ''f said1 plane betweentheshaft'and' the pivotofI the arm; a'nfidler'rollcarriedfby the reepa'rtof the brakelreleaiseiarrn posi'tio'nefdi to receive therearound `afloop fL-webyvhenfsuchloop is extended 35 fromf'said'f'reel'penerally l"atg asubstantial' Langle iii across'saidiplanfand 'a'crank arm`xedwit1ithe elesearnr engag'edfaross and'bearng on a part of"'-'tii`' bra-lebar; saidv crankarm extending-Y from thereleafsefarm Aiii a ii'iectiuriito--move the"bar ,o gainst'action of'fsaid resilient means under pull .-f offavveb lo'opengag'e'daround'saididlerr^ "M" summons. .onlin vThe follgwhig. rffeselsfs arg1?? re 1,111, .the

' Number Y Y Name l 1 Date 1950;473 cmibenetn Maru; 1910 Certificate of Correction Patent No. 2,438,887. April 6, 1948. HARRY W. ALLEN It is hereby certified that errors appear in the above numbered patent requiring correction as follows: In the grant, lines 1 and 13, name of inventor, for Henry W. Allen read Harry W. Allen; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 1st day of June, A. D. 1948.

THOMAS F. MURPHY,

Assistant Oom/Infissoner of Patents.

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