US2184508A - Rotary file - Google Patents

Description

C. W. MAJOR Dec; 26, 1939.

ROTARY FILE Filed Jan. 25, 1937 INVENTOR 624/9455 1/ M10? Patented Dec. 26, 1939 UNITED STATES PATENT OFFICE ROTARY FILE gart, Valatie, N. Y.

Application January 25, 1937, Serial No. 122,191

17 Claims.

This invention relates broadly to new constructions of rotary files.

One of the objects of this invention is the creation of a construction of rotary file adaptable to general use and which is simple and easy to manufacture and use and which is of rugged construction.

Another object of this invention is the creation of constructions of rotary files which are adaptable to insertion between ignition points of the ignition system of an internal combustion engine to file and clean the same, and which constructions are such that they are convenient and easyto insert and use.

Another object of this invention is the creation of constructions of rotary files of convenient and desirable shape and size and which are adaptable to simple and easy manual handling and use for general purposes.

A still further object of this invention is the creation of a plurality of variant possible embodiments of rotary file construction employing the principles of my invention.

Various other objects and advantages of the invention than those hereinabove mentioned will appear more fully hereinafter. It is to be understood, that the specific forms shown are merely illustrative and hence the detailed description thereof is not to be taken as limiting the invention itself.

The invention resides substantially in the parts, as well as in the combination, construction, location and relative arrangement of parts, all as will be more fully pointed out hereinafter.

Referring to the drawing wherein like reference numerals refer to the same or similar parts throughout the several views, it will be found that:

Fig. 1 illustrates a front elevational View of a rotary file of my invention;

Fig. 2 represents a sectional view taken along the section line 22 in Fig. 1, looking in the direction of the arrows, this view being shown with added points to be operated upon in proper relative position;

Fig. 3 represents a sectional view taken along the section line 33 in Fig. 2, looking in the direction of the arrows, and this view shows the rotary file of Fig. 1 with a side plate removed;

Fig. 4 represents a sectional View of the rotary file taken along the section line 4-4 in Fig. 2, looking in the direction of the arrows and with the rotary file being shown in position for operation upon the ignition points of an ignition unit, said unit being shown added in dotted lines;

Fig. 5 is an enlarged sectional view of an abrader wheel or disc adaptable to use in my rotary file constructions;

Fig. 6 represents a sectional View similar to that of Fig. 2, but of a variant possible embodiment of rotary file construction of my invention;

Fig. 7 illustrates a front elevational view similar to that of Fig. 1 of a rotary file of my invention, but having a variant possible embodiment of side plate .construction of my invention; and

Fig. 8 illustrates a side elevational view of a rotary file of my invention and of a variant possible embodiment in which I incorporate an operating knob.

It is the purpose of this invention to make more useful and improved file constructions. In the past files of various types and constructions have been devised. However, as far as I have found, such devices as have been created have proven exceedingly difficult and clumsy, if not entirely impossible and incapable to use for the filing and cleaning in a limited small space of closely adjacent surfaces and/or surfaces which are difficult to have access to and/or surfaces which are so positioned or disposed as to provide but little room for freedom of movement. Thus, as far as I have found, such files as have been devised have proven entirely valueless to effect a ready and easy filing and cleaning of closely adjacent surfaces such, for example, as those of the ignition, spark or breaker points of an ignition distributor unit such as is conventionally employed in connection with an internal combustion engine of a number of cylinders as in the present day automobile or the like. As is well known, in such a unit the ignition, spark or breaker points are spaced quite close together, are often so located that, although accessible, but little room for freedom of movement is presented and usually are so disposed in the receptacle in which they are contained that they are quite close to a wall or the walls .of such receptacle in the interestof conservation of space. The result of this is that persons desiring to file and clean surfaces of such character under such conditions or under conditions similar thereto have been compelled to make the best use they could of such file constructions as have been available, but obviously Without satisfactory result. Thus, in the particular' case of distributor ignition points I have found mechanics to often resort to the employment of a common straight finger-nail file which they slide between the ignition points and reciprocate back and forth in very short strokes so as to avoid striking, engaging with or otherwise contacting the wall or walls of the receptacle of the ignition distributor unit. As is apparent a filing and cleaning thus to be accomplished is a difficult, laborious, time consuming and expensive task.

Such being the problem it is my purpose to provide novel file constructions free of such disadvantages and to said end I have created the rotary file constructions which I will now describe.

Turning now to the drawing and particularly Figs. 1 to 5, inclusive, thereof, it will be noted that my rotary file has a front side plate I and a rear side plate 2 between which are rotatably mounted two relatively thin wheels or discs. These wheels or discs are an upper relatively thin wheel or disc 3 having radial teeth 4 over the periphery thereof; and a lower relatively thin file or abrader wheel or disc 5, preferably of smaller diameter than that of wheel or disc 3, and which also has radial teeth 6 over the periphery thereof. Wheels or discs 3 and 5 are so arranged and disposed that teeth 4 mesh with teeth 6 so that actuation of wheel or disc 3 to rotate the same will be effective to rotate wheel or disc 5.

An upper eyelet or the like 'I and a lower rivet or the like 8 provide means for holding the parts together in proper relative position and also provide axes of rotation for the upper and lower wheels or discs 3 and 5, respectively. Side plate I is provided below rivet 8 with an appropriately shaped hole 9 therethrough which is usually preferably circular in shape, while side plate 2 is provided with a like hole I0. Said holes preferably are of equal and suitable diameter and are correspondingly located in the respective side plates at equal distances below the rivet 8 in a Vertical direction. At this point it should be noted that the vertical distance between the center of eyelet I and the center of rivet 8 is such that teeth 4 mesh with teeth 6 so that rotation of wheel or disc 3 may be transmitted to wheel or disc 5.

Each of side plates I and 2 has an outer edge outline substantially like the outer edge outline of an inverted Arabic numeral 8. That is to say, each side plate is so shaped that it has an upper portion II and a smaller integral lower portion I2. In each plate the upper portion I I is preferably also so shaped that the teeth 4 are exposed beyond the outer boundary thereof for manual grasping only at the right and left sides of the plate. It will of course be understood that, if desired, such upper plate portion may be so 1 shaped as to also expose the teeth 4 at the top of the plate. Further, in each plate, lower portion I2 is preferably so shaped as to completely overlie the teeth 6 which at no point extend out beyond the outer edge or boundary of such portion.

Lower wheel or disc 5 is provided with file or abrader surfaces on each side thereof which upon rotation of said wheel or disc will pass under the holes 9 and II], respectively. These side file or abrader surfaces preferably are presented by the employment of a toothed wheel or disc 5 having a body I3 of metal or other suitable material, which body has side file and/or abrasive 7 surfaces afiixed thereto in any suitable fashion ing serrated side file surfaces either integral therewith or properly affixed thereto or in any other suitable desired fashion calculated to provide the necessary file and/or abrasive side surfaces to wheel or disc 5, so that said surfaces may be available for passage beneath the holes 9 and I0. At this point I desire to further point out that a satisfactory wheel or disc 5 for filing and cleaning may be readily produced by applying the abrasive material to the sides by spraying a proper preparation thereof onto the wheel or disc sides, where it is permitted to dry and harden.

Referring now particularly to Figs. 2 and 4 of the drawing it will be observed that if it be desired to employ my rotary file for the filing and cleaning of surfaces such as those of two ignition, spark or breaker points I5 and I6 of an ignition distributor unit I'I, without removing the points from the unit, that the points may be separated and my rotary file, held between the thumb and forefinger of one hand, may be slipped therebetween. When this is done the outer surface of side plate I will be caused to slide over ignition point I5 and the outer surface of side plate 2 will be caused to slide overignition point I6 until said points I5 and I6, respectively, are in alignment with holes 9 and Ill, respectively, when the usual spring influenced tendency of one of such points to come together with the other of such points will cause the points to respectively enter holes 9 and I0 and press upon and clamp against the respective file or abrader side surfaces of the wheel or disc 5; that is to say. point I5 will press against one file or abrader side surface of said wheel or disc while point I5 will press against the other file or abrader side surface thereof.

Once the points I5 and I6 are in this position the upper wheel or disc 3 may be rotated by the thumb and forefinger of the other hand respectively acting at and upon the exposed accessible teeth thereof hereinbefore mentioned as being exposed at the right and left sides of said wheel, or at and upon whatever portion that may be conveniently accessible in the upper portion of my rotary file as same may be made to actuate the wheel or disc 3. Since teeth 4 are meshed with teeth 5 rotation of wheel or disc 3 will cause wheel or disc 5 to rotate and such movement causes the respective side file and/or abrasive surfaces of wheel or disc 5 to pass beneath holes 9 and I0 and over and against the respective ignition point surfaces to be filed and cleaned.

From the foregoing it will be understood that by giving an appropriate number of turns to wheel or disc 3, that the wheel or disc 5 being preferably of smaller diameter than the diameter of wheel or disc 3, will make an appropriate greater number of turns and the respective ignition point surfaces to be filed and cleaned will be rapidly and effectively smoothed, cleaned and freed of carbon. Since reciprocal strokes of a straight file are not employed in my device, but

filing and cleaning is effected rather by a rotary movement, it follows that limitation and cramping of movement is completely obviated by the employment of my device. Since the holes 9 and I0. are close to the bottom of my rotary file no substantial or great portion of said file will project downwardly and said file will extend downwardly beneath said points but a slight distance and hence the fact that ignition points are usually located adjacent a distributor receptacle wall is of no moment. Moreover, since my wheel or disc 5 is actuated from above it follows that limited room for freedom of :movement'is like-- wise of no moment. Still further, since the person who employs my file may clean and file by disc, if desired, may be mounted on a pin I8, ex-. tending preferably slightly out therefrom on each side thereof, and the side plates I and 2, instead of being provided with rivet holes may be provided with depressions or cavities I9 by having same pressed-out orotherwise formed therein by suitable process.

When the structure is thus formed one freeend of thepin 18 extending from one side of the wheel or disc 5 is adapted to besnapped into andreceived in the depression or cavity IS in the adjacent sideplate on said wheel or disc side,.while the other free end of the pin 18 extending from the other side of the wheel or disc 5 is adapted to be snapped into and received in the depression or cavity It in the adjacent side plate on the other wheel or disc side. In this connection, it will be understood that in this embodiment the absence of the rivet 8 will leave the .eyelet I as the only element joining and holding the parts in proper relative position, and it will be further understood that although the side plates I and 2 are sufficiently rigid to remain in proper normal extended flat condition when not subjected to great forces tending to distort the same from such condition, yet such plates are relatively thin, as aforesaid, and since with respect to the thickness of said plates a relatively'great distance will existbetween' the center of eyelet l and the bottom of the rotary file,it will be understood that sufficient resiliency is presented in the plates to permit of the same being manually sprung apart at the bottom and sufficiently separated to permit'a given wheel or disc 5 to be slid up into operative position, to wit:

withiits teeth 6 meshed with teeth 4 andits pin.

ends in proper depressions or cavities is, or else topermit a given wheel or disc 5 to be removed from operative position. It of course will be re.- alized that release of the force or forces tending 'to spring theside plates apart and to separate the same at the bottom of the rotary file will result in such side plates returning to their original flat positionparallel'to each other; and to the wheel or disc sides, at which time the free ends of the pinlfi of the given wheel or disc 5 'will be rotat'ably held between the opposed depressions or cavities Further than the foregoing it will be understood that the side plates need only be sprung apart or separateda suificient distance to permit of the :pin it being brought into line with the depressions or cavities l9 and since, as aforesaid, the pin is preferably extends but slightly out from the Wheel or disc 5 on each side thereof, it follows that the distance of separation necessary to permit a given wheel or disc '5 to be placed 'in or removed from operative position will not be great, and in fact, same will be observed to be but slightly greater than the distance of separation of the plates when in position :parallel toeach other 75 and theisides of the wheels or discs, It ofcourse of such surface. construction of this embodiment will be indefinitely greatif the wheel or disc '5 is from time to time replaced by anew and fresh wheel or disc others. crusted and/or otherwise in need of proper treatwill be understood'that whenthe side plates are separated as hereby contemplated that they will during separation diverge away from the eyelet 1 and that the factor which controls the distance of separation of the plates at the bottom of the file is that, as hereinbefore mentionedrthe position of the pin i8 must ultimately be in vertical alignment with the depressions or cavities l9 before the side plates are released and permitted to bring'back. This, of course, will mean that the plates will be separated at the bottom of "the device by a distance greater than the neces- 'sary distance of separation at the depressions or cavities, but even this greater amount of separation due to divergence of the plates away from eyelet i will be relatively small.

By the employment of this embodiment, it will be appreciated that a user of the rotary file may easily and conveniently replace a used and worn wheel or disc .5 by a new and fresh wheel or disc 5 or" replace a wheel or disc 5 of one grade, type or kind of abrasive or file surface by a wheel or disc 5 of another or different grade, type or kind Thus, the life of the rotary file 5. Likewise,'the possible range of variation in the grade, type or kind of surface increases the range of usefulness of the :device. Thus, by the employment of a single rotary file having a re- .movable lower Wheel or disc 5 and a number of other such wheels or discs of different grade, type or kind of abrasive or file surface, my device is adapted to a long life, a wide range of use and may beeasily and readilymade to meet the peculiar'requirements of the particular filing and a cleaning task to be accomplished. The grade, type or kind of abrasive or file surface may be changed to meet the nature of the surface or sure faces to be treated, the condition thereof ,and the task to be accomplished thereon. Some surfaces to be treated being softer than others will require finer grades of abrasive or file surfaces than will some surfaces may be pitted and/ or enment, and such surfaces will probably be best treated by the initial employment of coarser grades of abrasive or file surfaces and the later employment of finer grades thereof for finishing 01f and/or polishing the surfaces treated. Still other surfaces will necessitate'the employment 'only of a single type, kind or grade of wheel or disc 5 side surface, but will rapidly wear out the particular abrasive or file'surface thereof and necessitate frequent renewal thereof. Further, it is obvious thata combination of conditions may arise but the same may bemet by the prop eremployment of my device. 1

Turning now to Fig. 7, it will be observed that the holes 9 and i0 may be provided with sidewise extending openings 2!! and 2! to produce an effective crescent-like shaped opening in conjunction with the circular openings or holes 9 and lil. It should of course be understood that the openings or holes in the side plates at the positions of holes 9 and It may be shaped as desired to accord with the contemplated use of the rotary file and that probably the circular type of opening will be found most frequently to be desired.

,I-Iowever, whena crescent-like shaped opening is provided in conjunction with a circular opening, the rotary file provided with such a combination opening in one or both side plates may be .employed'to file finger-nails as Wellas. any other object capable of being fitted into the openings or holes provided such for example as ignition, spark or breaker points. From this it will be now understood that by proper shaping of the holes employed in the side plates to meet the contemplated use that my rotary file may be adapted to various uses or combination of uses. It may at this point be observed that if the rotary file is intended to be used for the filing of finger-nails that if the crescent-like shaped opening is provided in both front and rear side plates l and 2 that two finger-nails may be filed at the same time, if convenient, or otherwise the device may be employed in the fashion'most suitable to the user.

Next, referring to Fig. 8, it will be observed that I there show an embodiment wherein the eyelet for the upper wheel or disc 3 has been replaced by a pin or short rod 22 on which the upper disc or wheel 3 is secured so that rotation of pin or rod 22 will cause rotation of upper wheel or disc 3. This rod may be secured to the upper wheel or disc 3 by any suitable means adapted to accomplish my purpose just stated. Each of side plates I and 2 is provided with the usual holes through which the eyelet would have been passed had the same been employed and in this embodiment the free ends of pin or rod 22 pass through said holes. On one side of the rotary file, I preferably have mounted, on the free end of the pin or rod 22 extending through the hole in the adjacent side plate, a small knob or finger-wheel 23 adapted and so arranged that when the same is manually rotated it will rotate the pin or rod 22 and the upper wheel or disc 3 secured thereto. This may be arranged for by securing the knob or fingerwheel 23 to the pin or rod 22 in any suitable fashion or by making the same integral therewith. The other free end of pin or rod 22 is preferably peened down or otherwise formed with a head 24 which while in no way interfering with rotation of element 22 prevents withdrawal and/or displacement thereof.

From the foregoing it will be understood that in the embodiment shown in Fig. 8, actuation to effect rotation of upper wheel or disc 3 and in turn lower wheel or disc 5, may be supplied from the devices front or rear side plate, as the case may be, instead of from the exposed portion of teeth 4. This, in certain instances, may be found more convenient or desirable to meet the conditions under which the device is employed or the convenience and manner of use of the user. At this point I desire to bring out that as a matter of assembling my device in this embodiment that one convenient expedient would be to use a rod or pin 22 having the finger-wheel 23 form integrally on one free end thereof, the other free end being adapted to be passed through the hole in one side plate, driven through a snug fitting hole in the upper wheel or disc 3 and thereafter passed through the hole in the other side plate and peened or formed down towards the outermost surface of such last mentioned plate. It of course will be appreciated that changes may be found suitable and desirable in such a construction, thus element 23 might be secured by proper threading onthe free end of pin or rod 22 and threaded nuts might be employed in place of the head 24, and I desire therefore that my description of the possible construction of Fig. 8 as well as the possible manner of assembling same be interpreted solely as illustrative and not as in any way limiting the invention itself.

At this point it will be further realized that many changes well within the scope of my invention as herein disclosed will readily suggest themselves to those skilled in the art- Thus, a plurality of vertically spaced apart holes instead of a single hole 9 or ID in each side plate may be found desirable, further'differences in the shape or location of side plate holes may be found desirable. Moreover, it may be found desirable to limit the wheel or disc side abrasive or file surface to a circular band of a given width, which width would have to be sufficient to effectuate the desired filing and cleaning, and would leave the remainder of the sides of the wheel or disc 5 free of abrasive or file surface. In most cases where bands of abrasive surface are applied to the sides of a given wheel or disc 5, I believe it will be found preferable to make the width of the bands equal to, if not slightly greater than the vertical height of the openings in the side plates giving access to the wheel or disc sides. In the event that a plurality of vertically spaced apart holes instead of a single hole 9 or I is provided in each side plate, it may be found desirable to employ a plurality of concentric abrasive bands or to employ a wheel or disc having the entire sides thereof of abrasive or file surface.

Going still further it will be realized that as desired changes may be madein the shape and thickness of the side plates as well as in the thickness, diameter and shape and form of the teeth of each of wheels or discs 3 and. 5, and it will also be understood that when desired the grade, type or kind of wheel side abrasive or file surface need not necessarily be the same on both sides of the wheel or disc 5, but rather may be made to meet the requirements of the filing and cleaning task to be effected. Likewise the relative position of the hole or holes in one side plate to give access to the wheel side may be either in vertical alignment with the hole or holes in the other such side plate or be displaced with respect thereto as may be required by the surfaces to be filed and cleaned, thus, for example it may be desired in some instances to have a given side hole If] in a given rotary file at a position vertically above a given side hole 9 therein. Still further it may be realized that any suitable securing means which will effectuate the purpose of the eyelet l and the rivet 8'may be employed in place thereof, thus, to accomplish the desired effect an eyelet I may be satisfactorily replaced by a rivet or other suitable element while the rivet 8 may be likewise replaced by an eyelet or other suitable element.

Next it will be appreciated that although I have disclosed my device as operable by manual grasping of teeth 4 or by actuation of the element 23 in the case of the variant embodiment provided with such element, the same may be actuated by any other suitable desirable means, thus the upper wheel or disc 3 may in some instances be preferably actuated by a handle or crank or the same may even be power-driven by a motor or other suitable power source. Certain instances may even present themselves where it may be desired to actuate the wheel or disc 5 directly, although, as will be readily understood, such instances will not exist where the surfaces to be filed and cleaned are so located that actuation from above is necessary due to limitation in space, freedom of movement, etc.

While I have disclosed my device as being an article of relatively small dimensions, it will be understood that I do not intend the same to be trary, the device may be made with parts of such dimensions, whether relatively large or small, as will prove most suitable .to accomplish the filing and cleaning task to be performed. I may say however, that I have found that in the case of ignition point'surfaces that a rotary file constructed in accordance with my invention is preferably'of small dimensions and as a whole is of convenient pocket size, when intended for the filing and cleaning of ignition points such as are customarily employed in an automobile distributing unit.

From the foregoing, it is obvious that I have created constructions of rotary file adapted to the ready filing and cleaning of surfaces such as ignition point surfaces or the like or other desired surfaces without the necessity of removing such surfaces from their operating positions for treatment, which rotary file constructions are nevertheless easy to use and operate in spaces of such dimensions as limit freedom of movement.

It will next be understood that my constructions herein disclosed may be readily made and assembled by cheap and simple processes. 1 Thus, if desired, most of the parts can be made by stamping, pressing out and like simple and cheap methods of manufacturing same, with noeffect upon the operation of the finished article. Likewise,-if desired, the parts may be manufactured by more elaborate processes to meet individual requirements.

It should further be understood that the thickness of the abrasive or file wheel side surfaces as well as the grade, type or kind thereof may be varied as desired to meet the needs and requirements of the user, and as well to present at all times an economical finished article.

Inasmuch as many changes may be made in the rotary file constructions, and in the parts thereof, as I have hereinabove from time to time pointed out and inasmuch as other changes might likewise be made therein without departing from the spirit and the scope of this invention and inasmuch as many apparently widely and different embodiments within the scope of the invention may be made and still further inasmuch as my invention may reasonably be used in many fashions, shapes, types, constructions, materials and for many purposes, it is intended that all matters hereinabove contained or shown in the ac companying drawing shall be interpreted as illustrative and not in any way as limiting the invention itself.

The following claims are intended to cover all generic and specific features of the invention described.

' What I seek to secure by and claim for United States Letters Patent is:

1. In a device of the type described a pair of side plates each having an opening therethrough in which articles to be filled and cleaned may be inserted, an upper wheel rotatably mounted between said side plates, a lower wheel also rotatably mounted between said side plates and having side surfaces adapted to file and clean when said lower wheel is actuated to rotate, means carried by said upper and lower wheels for transmitting rotation of the upper wheel to the lower wheel and means for holding the aforesaid parts in proper relative position with respect to each other and the lower wheel in such position that the side surfaces thereof may pass under the side plate openings aforementioned upon rotation of the wheels.

2. In a device of the type described a side plate having an enlarged upper portion and a lower said side plates, a toothed disc rotatably mounted 7 between the lower portions of said side plates and arranged with its teeth meshed with the teeth of the first mentioned disc, a file surface disposed on each side of the second mentioned disc and arranged to pass beneath the side plate openings,-

and means securing the parts in proper relative operating'position.

3. In a device of the type describeda side plate having an outer edge outline substantially like the outer edge outline of an inverted Arabic numeral 3 and having an opening therethrough adjaoent the bottom thereof, a second similar side plate, 'a relatively thin upper toothed disc rotatably mounted between said side plates; and arranged with its teeth projecting beyond the outer edge of the upperyportion of each of said plates at the sides, a relatively thin lower second toothed disc rotatably mounted between said side plates with its axis of rotation spaced apart from the side plate openings and with its teeth in en: gagement with the teeth of the upper disc, said lower disc being provided with abrasive orfile surfaces on its sides which are adapted to pass beneath the aforementioned side plate openings upon rotation of said discs and means for holding the plates and discs in proper relative position with respect to each other.

4. In a device of the type described a pair of side plates, a pair of toothed meshed wheels rotatably mounted between said side plates, an abrasive surface formed on one of said toothed Wheels, means spaced apart from the axes of rotation of said wheels giving access to said surface and means holding said plates and wheels in relative operating position with respect to each other.

5. In a device of the type described a pair of side plates, an eyelet passing therethrough, a toothed disc rotatably mounted between said plates. on said eyelet, a rivet passing through the plates in the lower portion thereof, a second toothed disc rotatably mounted between said side plates on said rivet and having an abrasive surface on each side thereof and arranged so that its teeth are in meshed engagement with the teeth on the first mentioned disc and means formed in each side plate adjacent the bottom thereof giving access to the aforesaid abrasive surfaces.

6. The structure recited in claim 4 characterized in that means are provided so that one of said toothed wheels may be removed for replacement.

'7. The structure recited in claim 4 characterized in-that the wheel having the abrasive surface may be removed for replacement.

8. The structure recited inclaim 4 characterized in that the wheel not having the abrasive surface is actuated by afinger-wheel secured thereto and rotatable therewith.

9. In a device of the type described a rotary file comprising a side plate having an upper and a lower portion, a second side plate of similar construction, a rotatably mounted disc secured between the upper portions of each of said side plates for rotation therebetween, an eyelet passing through said side plates and providing an axis of rotation for said rotatably mounted disc, a second rotatably mounted disc secured between the lower portions of each of said side plates and means engaging said discs so that rotation of the first mentioned disc may be transmitted to the second mentioned disc and means formed extraperipherally on said second mentioned disc for effecting filing and cleaning thereby upon rotation of the discs.

10. In a device of the type described a side plate having an upper and a lower portion and an opening extending therethrough from one side thereof to the other, a second similar side plate, an upper actuating wheel secured between said side plates at the upper portions thereof, an element adapted to pass through said side plates and said wheel at the upper portions of the side plates and to provide means for securing the side plates and wheel together as well as providing an axis upon which said wheel may rotate between said side plates, and a lower wheel having its axis of rotation spaced apart from the side plate openings and having an abrasive adapted to be actuated by said first mentioned wheel to cause the abrasive to pass beneath the side plate openings.

11. The structure recited in claim 10 characterized in that the side plate openings provided are circular in form.

12. The structure recited in claim 10 characterized in that the side plate openings are crescent-like in outline.

13. The structure recited in claim 10, characterized in that the side plate openings are of an outline combining a circular and crescent-like shaped opening.

14. In a device of the type described a pair of side plates, an upper finger-wheel, an element securing said side plates together with the said wheel mounted on said element for rotation on said element and between said side plates, said side plates being formed with openings adjacent the bottom thereof and pressed out depressions above said openings, a second wheel having an abrasive on each side surface thereof, a pin carried by said second wheel at the axis thereof and which pin extends out from said wheel to either side thereof to provide extending free pin ends respectively adapted to reception in the aforementioned side plate depressions, and cooperating teeth carried by each of said wheels for meshing and transmitting rotation of the upper wheel to the second mentioned wheel, said second mentioned wheel being arranged to be rotated by said first mentioned upper wheel and with the free pin ends being borne in the side plate depressions so that the abrasive on the second wheel side surface may be passed beneath the openings in the side plates adjacent the bottom thereof.

15. A rotary file for filing and cleaning ignition. points comprising a pair of relatively thin side plates each having an ignition point opening adjacent the bottom thereof, a toothed relatively thin upper actuating wheel rotatably mounted between said side plates, a second toothed relatively thin lower wheel of smaller diameter having its teeth intermeshed with the teeth of the first mentioned wheel and having abrasive side surfaces adapted upon rotation to pass under the aforementioned openings.

16. In a device of the type described a pair of side plates, an upper toothed actuating wheel rotatably mounted between said side plates, an engaged lower toothed filing wheel also mounted between said side plates and having a file surface on each side thereof, means formed in each side plate, and spaced apart from said mountings, giving access to the file surface, means securing the parts in proper relative operating position and a finger-wheel carried by said upper toothed actuating wheel for rotating the same and causing the same to rotate the lower toothed filing wheel to cause the file surface thereof to move beneath the means in the side plates giving access thereto.

17. A rotary file combining a pair of substantially parallel plates, a rotatable wheel disposed between said plates, a second rotatable wheel dis posed between said plates and lying in the same general plane as that of the first mentioned wheel, said second mentioned wheel having a file or abrasive surface formed on a plane side of said wheel within the periphery thereof, and means for transmitting actuation of the first wheel to the second.

CHARLES W. MAJOR.

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