US 3193908 A
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WHITE EEDLE SCALER Filed Oct. 3, 1963 TOR HOYT Hfl' ATTORNEYS United States Patent 3,13,9tl8 NEEDLE SCALER Hoyt T. White, Hampton, Va, assignor to Newport News Shipbuilding and Dry Dock Company, Newport News, 122., a corporation of Virginia Filed Get. 3, 1%3, Ser. No. 313,465 Claims. ((31. 29-81) This invention relates to a cleaning or scale removing tool, and more particularly to a tool adapted to be reciprocated by a power operated device so that the tool may strike repeated blows to a surface for removing scale, rust, paint and the like therefrom.
Briefly, the invention comprises an anvil adapted to be reciprocated by a power device and having a group of scale removing elements slidably mounted thereon so that when the anvil is reciprocated, the scale removing elements may strike the surface of an article for removing scale and other material therefrom. Since the scale removing elements are movable relative to one another and to the anvil on which they are mounted, they are particularly adapted for cleaning or scaling an article having an irregular surface.
It is an object of this invention to provide a scaling device which is simple in design, economical to manufacture, is strong and durable in use and requires a minimum of maintenance.
It is another object of this invention to provide a needle scaler which is light in weight and is adapted to be connected by releasable means to any conventional power driven hammer such as an air hammer. Since the needle scaler is connected by removable means to a power driven hammer, it may be easily removed from and replaced on the hammer with a minimum of effort and time.
It is still another object of this invention to provide a needle scaler having movable scaling elements or needles which are arranged in a narrow rectangular pattern so that in use the needles may be extended into narrow spaces and openings for cleaning surfaces therein.
It is yet another object of this invention to provide a needle scaler which has movable scaling elements consisting of conventional finishing nails which are easily and economically obtained.
it is yet another object of this invention to provide a needle scaler wherein its component parts are secured together in a new and novel manner.
The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawings, wherein:
FTGURE 1 is a front perspective view of the invention;
FIGURE 2 is a rear perspective view of the invention;
FIGURE 3 is an enlarged cross sectional view taken substantially on the plane of line 33 of FIGURE 2;
FIGURE 4 is a cross sectional view taken substantially on the plane of line 4-4 in FIGURE 3;
FIGURE 5 is a cross sectional view taken substantially on the plane of line 55 of FIGURE 3.
As illustrated in the drawings wherein like reference numerals throughout the various figures indicate identical parts, the needle scaler comprises an anvil 12, a sleeve 14, a nose or cover 16 and a plurality of scaling elements or needles 18.
The anvil 12 is composed of hardened metal and includes a plurality of cylindrical parts coaxial with one another. The cylindrical body 20 of the anvil has opposite end surfaces 22 and 24 extending radially and parallel to one another. A mounting shaft 26 is secured integrally to the center of face 24 and projects outwardly therefrom. Shaft is is provided with a ground reduced end portion 28. A cylindrical reduced extension or por- 3,1933% Patented July 13, 1965 tion 39 is integrally connected to the center of the front face 22 and projects forwardly therefrom. The extension 30 is integrally connected to a cylindrical projection 32 having a radially extending circular striking face 34.
The sleeve 14 is of hollow cylindrical shape and has an inner end portion which snugly telescopically receives the reduced extension 34 so that a relatively tight frictional fit is provided between the sleeve and extension. The sleeve 14 is provided with a threaded bore therethrough into which is threaded a set screw 36 having a reduced non-threaded cylindrical extension 38 which snugly fits within a cylindrical bore formed in the extension 30. The sleeve 14 also includes a radially extending end wall 40 having a circular bore 42 concentrically formed therethrough.
A circular mounting disc 48, is located within sleeve 14 so as to abut the wall 40, and is welded to the sleeve by welds 46. As shown in FTGURES 3 and 5, the disc 48 has rows of bores 51 formed therethrough which are arranged in a narrow rectangular pattern. Slidably mounted in the bores 51 are a plurality of scaling elements or needles preferably comprising conventional finishing nails 18 which are case hardened. Each nail 18 comprises an elongated cylindrical body formed with aconical point 52 on one of its ends and a slightly enlarged cylindrical head 54 on its other end. A cylindrical space 56 within sleeve 14 is defined by the striking face 34 and the rear face of disc 48. Space 56 has an axial length which is approximately two-and-one-half times the axial length of nail heads 54.
The nose or cover 16 includes a rear tubular portion 58 telescopically receiving the forward end portion of sleeve 14 and secured thereto as by welds 6d. The forward end of the nose or cover 16 is defined by an oval shaped edge 62 which encloses an opening 64 of substantially the same size and shape as the pattern defined by the bores 51 whereby the central portions of the nails 18 slidably engage the edge 62 and are retained in position thereby. Due to manufacturing tolerances, the diameters of the nails 18 may vary thereby causing them to have a relatively loose fit within the bores 57. However, in spite of such a loose fit, the nails are prevented from separating from one another at their pointed ends since they are positively retained adjacent one another by the edge 62. The edge 62 is integrally connected to the tubular portion 58 by a tapered wall 64 of substantially conical shape. The opening defined by edge 62 and the rectangular pattern of the bores 51 each have a length substantially two-and-one-half times their widths.
To disassemble the needle scaler it), it is only necessary to remove set screw 36 and axially separate sleeve 14 from the reduced extension 30 whereupon the nails 18 may be easily withdrawn from the bores 51, and if desired, may be replaced by new nails, since the nail points 52 may become dull in use.
To reassemble the needle scaler, the new nails are reassembled within the bores 51 so that the heads 54 are adjacent the disc 48. The sleeve 14 is then forced upon the extension 30 until the end of the sleeve abuts the face 22. The set screw as may then be screwed into the bore formed in sleeve 14 so as to positively lock the sleeve and anvil together. When the sleeve 14 is assembled on the extension 39, a smooth outer cylindrical surface is provided on the scaler 10 since sleeve 14 and body 20 are of the same external diameter.
In use, the needle scaler Til is attached to a conventional pneumatic or electric hammer by means of shaft 26 and its reduced end 2%. For example, the reduced end 23 may be detachably connected to a power driven hammer by means of a conventional chuck or socket provided on the hammer. To remove paint, rust, scale, etc.,
from surfaces of 'art'icles the nail points'52 are placed adjacent the surfaces and the needle scaler is rapidly reciprocated back and forth by the power driven hammer to which it is attached. Since the nails 18 are free to slide relative to the, anvil 12, when some. of thepoints 524 strike a roughened surface the. other points will move by kinetic energy or inertia into depressions inv the surface thereby cleaning the high spots as well as the low spotston the surfaces. Nails of different sizes, weights and lengths In use, the heads 54 of nails 181are constantly banging against the striking face 34 which may cause flattening and radial enlargement of the cylindrical projection 32. However, since anrannular space 66 is provided between the projection 32 and the inside of sleeve 1'4; the projection 32 is free to eXpand withoutbinding within sleeve 14.
will receiving a reduced portion of said anvil, said striking face located within said sleeve and on a free end of said reduced portion, said sleeve having an end wall spaced from said striking surface and providedwith an opening therethrough, said scaling elements extending through said opening and having head-meanslocated between said striking surfaces and' end wall;
A scaling' device as defined in claim 1', including a disc welded to: said. end wall and closing said opening, said disc being provided with rows of bores therethrough,
, one of said scaling elements slidably extending through Inasmuch as various changes may be made in the a.
7 form, location and relative arrangement of, the several parts without departingfrom the essential characteristics of the invention, it"will be understood that the invention said anvil so that one end of each scaling element may 1 move into and out ofcontact with said striking face, said elongated mounting member comprising a stepped shaft in axial alignment with said striking surface and said mounting means comprising a, cup-shaped'sleeve telescopically each of said bores, saiddisc being parallel to said striking. surface and spacedtherefrom adist-ancesubstantially greater than the axial dimension of each of saidhead means. 7 a
3; A scaling device as defined in claim 2, Whereinsaid rows of bores are arrangedin a narrow rectangular pattern; I Y
4. A. scaling. device as defined in claim 2, including a tubular nose cover having one end welded to said sleeve and another end enclosing a central portion of each of saidscaling elements. V
5. A scaling device as defined in'claim 4, wherein the other end of said nose cover is reduced in size and has an inner surface engaging and slidably guiding each of said scaling elements.
References (iited by the Examiner. V UNITED STATES PATENTS 2,136,595 11/38 Rogers 29-81 2,356,314 8/44 Gray et al. 2981 2,672,677 3/54 Von ArX 29-81 2,716,314 7 8/55 Upham t 2981 A. WILLMUTH, Primary Examiner.
WALTER A. SCI-IEEL, Examiner.