US1437035A - Surface-spotting tool - Google Patents

Description

S. F. ANDERSON.

SURFACE SPOTTING TOOL. APPLICATION FILED MAR. 8,1920.

1 l3?,085 Patented Nov 28, 1922,

3 SHEETSSHEET 1. Z

S. F. ANDERSON. SURFACE SPOTTING TOQL. APPLICATION FILED MAR. 8. 1920.

SHEET 2.

Patented Nov. 28, 11922.

3 SHEETS S. F. ANDERSON.

SURFACE SPOTTING TOOL.

APPLlCATlON FILED MAR. 8. 1920.

Patented Nov. 28, 1922.

3 SHEETSSHEET 3. F

Patented Nov 28, 19223,

UNITED SWAN F. ANDERSON, 0F ROCKFORD, ILLINOIS, ASSIGNOR T0 ANDERSON BROS. IMFG. (30.,

OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

SURFACE-SPOTTING TOOL.

Application filed. March 8, 1920. Serial No. 363,975.

To (4Z7? whom it may concern Be it known that I, SWAN F. ANDERSON, a citizen of the United States, residing at Rockford, in the county of Vinnebago and State of Illinois, have invented certain new and useful Improvements in Surface-Spotting Tools, of which the following is a specification.

This invention pertains in general to the art of tools, and has more particular reference to one especially designed for producing a spotted effect on a metallic or other hard surface.

Heretofore, it has been the custom in the manufacture of metal and wood working machinery and the like, to give to certain exposed machined surfaces a finished effect known to the trade as spotted. The spot ting is done by means of a hand scraper, and in order to obtain satisfactory results a high degree of skill is necessary. In fact, because of the lack of such skilled hand WOI'l'Z- men, many manufacturers have discontinued the spotting of metal surfaces rather than place their product on the market with spotted surfaces of an inferior character. On the other hand, the spotting effect is very desirable, because when executed properly it produces an attractive and artistic finish peculiar to metal surfaces.

The primary object of the present invention is to provide means whereby a spotted effect may be produced with a greater degree of accuracy and uniformity than is possible to obtain by the ordinary hand method in vogue. As a consequence, the spotting done by means of my improvements is of a more artistic and ornamental character than that attained by other methods.

Another important object is the provision of means whereby the desired spotted effect may be produced in a very simple and easy manner without the use of specially skilled labor. In other words, any ordinary workman can with the use of my improvements, produce a highly ornamental spotted effect; and I have also aimed to provide a spotting device of such simple and novel construc tion as to enable this work to be performed in a remarkably short period of time.

Another object is to provide a device which will produce a spotted effect according to a predetermined pattern, and which shall be capable of adjustment to change and vary the spotted design so that many different spotted effects may be produced.

Still another object of my invention resides in the provision of a spotting device of the character described which shall be capable of embodiment in such simple design and form as to enable production at a comparatively low cost, and which shall serve the desired purpose in a very efiicient and practical manner.

My invention also contemplates the combination with a spotting tool proper, of suitable fixtures by means of which the tool is held in proper relation to the work, and provides means operative between the tool and fixture whereby the tool may be moved in step by step movements along the work to successively spot limited areas or strips of the surface until the entire surface has been spotted. In this regard, my invention also contemplates the provision of means for adjust-ably and detachably securing the fixture to work of various sizes and proportions.

In furtherance of the foregoing, I have devised as a working example of my invention, what might be termed a pattern guide by means of which a spotting scraper par ticularly designed for this purpose is guided when the scraper is moved across the work, preferably by manual application. Said pattern guide imparts a peculiar rocking movement to the scraper blade which, as will be fully appreciated hereinafter, produces the spotted effect. In the present case, the spotting tool is attached to a handle which the operator moves across the work in a forward and backward stroke after the fashion of the hand method of spotting. The operator, however, does not manipulate the tool other than move it forwardly and backwardly. The spotting movement is im parted to the blade by means of the pattern guide mentioned above, so that the skill heretofore required in the spacing and particular shape and designof the spotting dependent upon the skill and judgment of the workman, is now governed with precision by means of the pattern guide. Novel means is also provided for advancing the spotting device in step by step movements across the work and at each station the scraping tool is operated to spot a single strip; and by repeating this operation the entire surface will be spotted.

Other objects and attendant advantages will be appreciated as the invention becomes better understood by reference to the fol lowing description when considered in connection with the accompanying drawings, in which- Fig. 1 is a plan view illustrating' a preferred embodiment of a spotting tool;

Fig. 2, an enlarged. face view of the carriage shown in Fig. l, which carries the pat tern guide;

Figs. 3 and 4:, crosssectional views taken on the lines and 4-4: of Figs. 2 and 1, respectively.

Fig. 5, a sectional view taken on the line 5-45 of Fig. 1;

Fig. 6, a side elevation of the blade carrier;

Fig. 7, a front elevation of the blade carrier as taken on the line 7-7 of Fig. 1;

Fig. 8, a front elevation of the blade end alone of the carrier in an adjusted position;

Fig. 9, a longitudinal sectional view through the blade carrier equipped with a modified form of spotting blade;

Fig. 10, a plan view of a spotting tool of a somewhat modified form embodying my improvements Fig. 11, an enlarged plan view of the pattern guide carriage shown in Fig. 10;

Figs. 12 and 13, cross sectional views taken on the lines 1212 and 13-13, respectively, of Fig. 10; and

Figs. 1a and 15, views illustrating diagrammatically different spotted effects produced by my improvements;

As suggested above, my invention contemplates the production of Spotted effects of a more uniform and artistic character than are capable of production by the methods heretofore in vogue which depended entirely upon the skill and judgment of the operator. This result is obtained here by mechanical devices of such simple and novel nature that any ordinary workman can produce the most desired spot-ted effects on a given surface in a remarkably short time. This is made possible primarily by means of what I term a pattern guide with which spotting tool of novel construction is associated and by which it is actuated to impart such movement to the cutting blade during its travel across the surface of the work as will produce the spotted effect. In this regard, however my invention contemplates broadly suitable means for imparting to the blade the desired spotting movements while the blade is moved across the work, and by advancing the tool in step by step movements at each step of which a row of spotting is effected, the entire surface may in thi manner be spotted.

As will be explained more fully hereinafter, I have illustrated. several examples of carriages for advancing the spotting device along the work and for holding the device in operative relation to the work. Provision is also made for securing the spotted efi'ect either upon the forward or backward stroke of the tool, this being done by the substitution of the proper scraping blade for the purpose.

Referring now more particularly to Figs. 1 to 8 inclusive, which show what I believe at present to be the preferred embodiment of my improvements, it will be observed that the surface 18 to be spotted is in the present case, of rectangular shape, and that suitable means is provided for detachably connecting the sootting device in proper relation to this surface. This means consists, generally. stated, of a plurality of attaching brackets 19, which carry a guide rail 21 in the form of a round rod. Upon this rod or rail is mounted and slidable longitudinally, a carriage designated generally by character 22, which carries a pattern guide 23. The pattern guide reaches across the surface to be spotted and is adjustable about the vertical pivot 24: to different angular positions. As-

sociated with this pattern guide is a scraping tool designated generally by character which is adapted to be moved back and forth across the surface 18.

The scraping tool might be of any suitable or preferred construction. and adapted to be moved by any suitable motive power. In the present illustration of my improvements the tool is manually operated and consists of a handle or shank 26. This shank is equipped with a. head 27 provided on its underside with a blade socket 28,1501 the reception of a scraping blade 29. Viewing 7. it will be observed that the sides of the blade and socket are tapered so that the blade maybe inserted from one end and will be retained by such. taper in association with the head. In order to rigidly secure the blade in position a tapered clamping bolt 31, Fig. 7. is provided. which when drawn upwardly by the nut 32, bears against the contiguous side 30 of the blade in a wedging action and rigidly clamps the blade against the socket wall by lateral thrust in the head 27. The cutting edge of the blade is slightly curved so as to have a limited contact with the surface The blade holder held in association with the pattern guide by means of an arm 34- OQHiDPQCl with a roller 35.. which is adapted to roll in a guide groove 36. The arm 34, pivotally attached tn the blade carrier. is adapted to be swung in a counterclockwise direction, viewing Fig. 6, out of operative position in order to permit free grinding and honing of the blade edge. In the present instance, the arm 34L is f xed to a shaft 37, mounted for rotation in the blade holder and having a flat spot 38, as shown in Fig. 9, against which a flat spring 39 is urged for holding the arm 34 in operative position and urging it against an adjustable stop 41. 7

From the foregoing, it will be apparent that the spotting tool is associated with the pattern guide 23 in the sense that it is guided thereby through means of the roller riding in the groove 36. The bottom of this groove is undnlated as shown plainly in Fig. 1 2, so that as the tool is moved along the guide the roller will. rise and fall as it passes over the hill. and valley undulations. Inasmuch as the cutting edge 33 of the blade rests on the surface 18 at one side of the roller 35, it will be obvious that this roller in rising and falling imparts a rocking movement to the blade as the same is moved across said surface, thereby shifting the point of contact between the blade and said surface, with the result that a scalloped cutting effect is produced. This effect is illustrated diagrammatically in Fig. 14, and might be varied considerably by change of the pattern guide and by adjustments between the blade and the guide. In the present example, however, it will be manifest that when the roller is at its lowest point, the blade will be in contact with the surface 18 approximately at the point indicated by the dotted line 42, Fig. 7, and at this point produces the cutting effect 42 indicated in Fig. 14. lVhen the roller rides upon a high point of the undulated groove 36, as shown in Fig. 8, the blade is rocked and the point of contact shifted approximately to a. point indicated by the dotted line 43, thus producing the effect 4-5, shown in Fig, 14. This scalloped or spotted effect may be varied considerably by adjusting the screw 41, for example, by slightly retracting the screw the blade will not be rocked so far to the left in Fig. 8, thus giving a more rounded appearance as shown in Fig. 15. By changing the shape of the cutting edge of the blade by grinding, the particular shape of the spotting may also be varied, it being apparent that greater or less curvature of the cutting edge will produce different effects. I will thus be seen that my invention contemplates broadly the production of spotted effects of widely different charactor, and if desired, the spotting need not be continuous as illustrated in the examples given in Figs. 14 and 15 but might be interrupted so that the spots stand out more distinctly. In the latter event it would be necessary to momentarily raise the blade from the surface 18 rather than join the individual spots as at the points 42.

It will now be observed that by arranging the pattern guide 23 oblique with respect to thezysurface 18, the sharp points 42' of the relatively U-shaped spots in each \row are caused to come centrally opposite the curved portions 43 of the spots in the adjoining row. The result is that when the surface'is finished the spots line up in rows from whatever direction the. surface is viewed, thus giving a certain symmetry and uniformity which promotes highly ornamental and artistic designs forgmetal surfaces of the character in mind.

After making one row of spotting by forward movement of the tool entirely across the work, the operator will advance the pattern guide laterally a given distance correspending to the particular pattern desired, which distance in the example shown in Figs. 14 and 15 would be the width of a single row of spotting. This advancement is done in step by step movements and 18 obtained with uniformity and precision by the provision of novel means operative between the carriage 22 and the rail 21. Re ferring now to Figs. 1 to 4 inclusive, it will be seen that the carriage 22 has spaced collars 44 and 45 slidable loosely on the rod 21 and held in rigid relation by the intermediate portion 46. A plate 47 interposed between the collars 44 and 45 and loose on the rod 21, is constantly urged against the collar 44 by means of expansion springs 48 supported by rods 49 which are fixed to the collar 45 and loose in the collar 44. The collar 45 is equipped with an outstanding rigid part 51 which carries a threaded rod 52 passing loosely through an opening in the part 47 and equipped with a nut 53. The outstanding parts 47 and 51 constitute finger grips, so that when pressed togetherthe part 47 binds on the rod 21 and the part 51, and consequently, the carriage will be moved to the left viewing Fig. 2, until limited by contact of the stop 53 against the part 47. Upon releasing this pressure, the carriage remains stationary and the part 47 will be returned by the springs 48 to normal position. A suitable friction is interposed between the carriageand the rod, such for example as a corkelement 54, Fig. 4, which prevents such free sliding action of the carriage on the rod as might cause accidental slippage of the carriage. It will thus be seen that by alternately pressing the finger grips 47 and 51 together and releasing them, the carriage 2.2 will be advanced in step by step movements along the rod 2l,-and that such movement will be of predetermined and uniform length.

The attaching brackets referred to generally above by the character 19, might be of any suitable or preferred construction and in their preferred embodiment consist .of parts 55 and 56 which are telescopingly adjustable and adapted to be locked by means of a nut. The part-55 of said bracket is adjustably connected at58 to a saddle part 59 having a semi-circular socket for reception of the rod 21. The outer end of the rod 56 is equipped with an adjustable stop 61 adapted to be tightened for clamping the bracket to the outer sides of the work. By reason of this construction any one bracket may be moved independently of the others by simply loosening the nuts 61 and 62, Fig. 5, and swinging the bracket in a crosswise direction so as to permit removal of the saddle portion 59 from the rod 21. Thus, when starting to spot one end of the surface or upon finishing the opposite end, the attacl1- ing bracket at such end of the work. will be adjusted so as to avoid interference with the spotting device. In other words, the brackets will be shifted from time to time to avoid interference with the spotting device as it is advanced over the work, as will be obvious.

Referring now to Figs. 10 to 13 inclusive, showing certain modifications, it will be observed that in this case the rail instead of being in the form of a rod is in the shape of a channel or guide rail beam 68. This beam may be detachably connected to the work in any suitable manner such as by means of at taching brackets 19, similar to those mentioned above but equipped with a suitable part 64 shaped to fit the channel 63, shown plainly in Fig. 18, and adapted to be clamped thereto through the agency of the gib 65. The carriage which carries the pattern guide 23, consists in this instance of parts 66 and 67, the latter of which is shaped to provide trunnion sockets 68 and 69 for the reception of trunnions 71 carried by the block 72 to which the pattern guide 28 is adjustably connected. These trunnions 71, shown in Fig. 12, are flattened on opposite sides so as to permit detachment from the sockets 68 and 69 by raising the pattern guide 23 to a vertical position, as will be obvious. The carriage parts 66 and 67 slidable on the rail 68, are joined by a rod 73, fixed to the part 66 and slidable freely through the part 67. An expansion spring 74 on the rod 73 constantly urges the part 67 away from the part 66 until limited by the adjustable stop 75 on the rod 73. The operation of this carriage is substantially the same as that described above, The operator presses the finger grips 66 and 67 together, thereby moving the latter to the left, viewing Fig. 11, until the part 76 strikes the part 66, and upon release of the finger grips the part 66 will be moved to the left under the influence of the spring 74E until limited by the stop 75. By adjusting the latter stop, this step by step movement is caused by the part 66 binding on the beam 63 when the parts 66 and 67 are pressed together, thus allowing the latter part to advance; and upon release of said parts, the part 67 will be advanced by the spring 74;

to the normal position limited by the stop 75, the extent of this advancing movement may be varied.

As mentioned above, the spotting operation may be performed either on the forward or back stroke according to the nature of the, scraping blade. Having described the blade used for spotting by the forward stroke, reference will now be had to Fig. 9, which shows the blade holder equipped with a supplemental blade holding part 77 shaped to carry a blade 7 8 in an upright position so that the spotting will be effected upon the back stroke. It will be obvious that the spotted effect produced is practically the same in both instances.

is believed that the foregoing conveys a clear understanding of the objects prefaced above and of the principles of my improvements and that my invention contemplates broadly the provision of a pattern or cam controlled cutting device or tool for producing a spotted elfect of the character described. In this regard it will be noted that the words spotted or spotting are used in the claims as designating a surface finishing of the general character applied to metal or other hard surfaces, irrespective of the particular shape, design and proportions of the spotting. It should also be understood that my improvements are capable of embodiment in various forms and are in no way limited to the particular design or arran ement shown in the present case for purpose of illustration, and that they might be embodied in Various forms without departing from the spirit and scope of the invention as expressed in the appended claims: in which- 1 claim:

1. The combination of a spotting tool, a pattern guide for governing the spotting movements of said tool, and means carrying said pattern guide and having manually operable means for advancing said guide in step by step movements across the surface of the work to be spotted.

9,. A spotting device of the character de scribed comprising a spotting blade adapted to be moved back and forth over a surface of the work, and means for rocking the blade transversely of its longitudinal axis during its movement over the work to produce a spotted effect.

3. A spotting device of the character de scribed comprising a handle equipped with a scraper blade, and means for imparting a transverse rocking movement to the blade as it is moved over the work to produce a spotted efiect.

l. The combination of a shiftable guide adapted to be moved in step by step movements across a surface to be spotted, a spotting blade, and means operative between the blade and guide for imparting a rocking movement to the blade as it is moved along the guide, whereby to produce a spotted surface of the character herein described.

5. The combination of a guide adapted to be moved over a surface to be spotted, a spotting blade, and means operative between the guide and blade for imparting a spotting movement to the blade as it is moved along the guide over the work.

6. A spotting device of the character described comprising a blade having a curved scraping-edge, means for guiding the blade in a predetermined path across the work and means for rocking the blade to produce on the surface of the work a scalloped cutting effect as the blade is moved over the work.

7. The combination of a blade having a curved scraping edge adapted to be manually moved across the work in contact therewith, and means for imparting such movement to the blade during its movement across the work as to produce a spotted effect on the surface thereof.

8. The combination of a spotting blade, a pattern guide, and a roller associated with the blade and movable along the pattern. guide for imparting to the blade a transverse rocking movement whereby to produce a spotted effect.

9. The combination of a pattern guide, means for moving said pattern guide in step by step movements across the surface of the work, and means governed by said pattern guide for producing a spotted effect on the surface at each station to which said guide is moved.

10. The combination of a pattern guide, means for moving said guide in step by step movements across the surface of the work, a manually movable device equipped with a spotting blade so associated with said pattern guide that the blade will be guided thereby as the device is moved across said surface to produce a spotted effect thereon.

11. The combination of a scraping tool having a curved edge blade adapted to rest on the surface to be spotted and means for pivotally supporting said tool, and a pattern guide for imparting such rocking movement to the blade as it is moved across said surface as to produce a spotted effect thereon.

12. The combination of a guide rail, means for detachably connecting said rail in juxtaposition to the surface of the work to be spot-ted, a carriage movable upon and along said rail and equipped with a pattern guide extending over the surface of the work, and a tool associated with said pattern guide and equipped with a scraping blade adapted to be actuated by the pattern. guide as the tool is moved across the work to produce a spotted effect on the surface thereof.

13. The combination of a guide rail, means for detachably connecting the guide rail to the work to be spotted, a pattern guide, means operative between the pattern guide and rail for moving the guide in step by step movements along the rail, and a spotting tool associated with and governed in its spotting movements by the pattern guide as said tool is moved across the surface of the work.

1 1. The combination of a guide rail, means for detachably connecting said rail to the work to be spotted, tool supporting means mounted on the rail and adapted to be moved in step by step movements along the same, and a spotting tool associated with the last mentioned means and adapted to be moved back and forth across the work for spotting the surface thereof.

15. In a device of the character described,- the combination of a spotting tool, a pattern guide for governing movements of the spotting tool, means for moving the pattern guide in step by step movements across the work, and means permitting adjustment of the pattern guide to vary the spotting.

16. In a device of the character described, the combination of a pattern guide, means for securing said pattern guide in diagonal relation across a surface to be spotted, and a spotting tool associated with said guide and adapted to be governed in spotting movements thereby.

1K. The combination of a spotting tool, and means adapted to be moved, in step by step movements across a surface to be spotted for guiding the tool in a diagonal path across said surface.

18. The combination of a spotting tool, and a pattern guide arranged diagonally across a surface to be spotted for guiding said tool.

19. The combination of a spotting tool, a pattern guide therefor, a carriage carrying the pattern guide and movable in step by step movements for advancing said guide across a surface to be spotted, and means permitting quick detachment of the pattern guide from said carriage.

20. In a device of the character described, the combination of a guide rail adapted to be attached in fixed relation to work to be spotted, a carriage movable upon said guide rail, finger actuable means for advancing the carriage in predetermined step by step movements along the rail, and a spotting device associated with the carriage whereby to be guided in its operation upon said surface.

21. A device of the character described comprising a pattern guide, means for sup porting the pattern guide in diagonal relation across a surface to be spotted, means permitting said guide to be moved in ste by step movements across said surface, an a spotting tool adapted to be manually moved along said guide and having a roller operably associated with the guide for guiding said tool.

23. In a device of the character described,

a guide having an undulated surface, a spotting tool having a blade with a curved cut ting edge, means operative between the tool and guide including a roller positioned in substantially lateral alignment with said cutting edge and adapted to roll on said undulated surface whereby to rock the cutting blade transversely as the tool is moved along said guide, and means permitting relative adjustment between said roller and the blade whereby to vary the spotting effect.

24. A device of the character described comprising a handle equipped with a scraping blade and a guiding element, and a pattern guide having an undulated surface, said guiding element adapted to move upon and be guided by said undulated surface for imparting transverse rocking movement to said blade as the tool is moved along the guide, and said tool being freely removable at will from the guide.

SWAN F. ANDERSON.

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