US2597526A

US2597526A - Rotary manicuring instrument

Info

Publication number: US2597526A
Application number: US45472A
Authority: US
Inventors: Kessler Merrill
Original assignee: ARISTOCRAT MANICURING Co
Current assignee: ARISTOCRAT MANICURING Co
Priority date: 1948-08-21
Filing date: 1948-08-21
Publication date: 1952-05-20
Anticipated expiration: 1969-05-20

Description

May 20, 1952 M. Kl-:ssLER 2,597,526

ROTARY MANICURING INSTRUMENT Filed Aug. 2l, 1948 FJ; Ei 4 INVENTo Werf/W Mms/@r R Patented May 20, 1952 ROTARY MANICURING INSTRUMENT Merrill Kessler, Oakland, Calif.,

assignor to Aristocrat Manicuring Company, a corporation of Nevada Application August 21, 1948, Serial No. 45,472

2 Claims. 1

The invention relates to rotary manicuring instruments adapted for power driven operation, as for example at the end of a flexible drive arranged for manual engagement and manipulation by the manicurist.

An object of the present invention is to provide a rotary power driven manicuring instrument of the character described, which is designed for ling of the edge portions of a finger nail to be manicured and which will afford a rapid and precise trimming of the nail with complete safety to the operator and to the person whose nails are being manicured.

Another object of the invention is to provide a rotary manicuring le of the character above which is designed as a companion instrument for use with a power driven manicuring device disclosed in my co-pending application Serial No. 33,077, filed June 15, 1948, and when so used will afford a faster, smoother and better-appearing manicuring of a finger nail.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of the preferred form of the invention which is illustrated in the drawings accompanying and forming part of the specification. It is to be understood, however, that variations in the showing made by the said drawings and description may be adopted within the scope of 'the invention as set forth in the claims.

Referring to said drawings:

Figure 1 is a perspective view of a rotary manicuring le constructed in accordance with the present invention, shown operatively attached to one end of a flexible drive.

Figure 2 is a side elevation of the instrument and drive connection illustrated in Figure 1, and shown on a somewhat enlarged scale and with a portion in cross section.

IFigure 3 is a still further enlarged cross-sectional view of part of the rotary file.

Figure 4 is a front elevation of the part of the le illustrated in Figure 3 with a portion in cross section, as indicated by the plane of the line 4--4 of Figure 3.

The manicuring device of the present invention consists of a handle member E formed at one end 'I for detachable connection to an end 8 of a exible drive 9 having an internal torsional drive element II terminating in a shaft part I2 journalled for rotation within the end 8 and having at its extremity a flattened drive tongue I3. Journalled for rotation Awithin the member 6, and mounted substantially axially therethrough,

is a shaft Ill retained against longitudinal displacement forwardly of the handle by the engagement of annular shoulders I6 and l 'I on the shaft I4 and within the internal bearing bore of the handle portion 6 respectively.

Preferably, the end 1 of the hand piece 6 is reduced in diameter and threaded externally for engagement with a threaded interior wall I8 provided at the end 8 of the flexible drive concentric to and spaced from the drive tongue I3. The drive connection is effected by the provision in one end I9 of the shaft part I4 of a cross slot 2I opening to an end of the shaft for receiving the tongue I3 and joining the tongue and shaft for joint rotation upon threading of the end 1 of the hand piece into the attachment 8. Preferably, the outer diameters of the hand piece 6 and attachment 8 of the flexible drive are the same, so as to provide a flush continuous external surface when these members are joined together for engagement in the hand of the operator. A1f desired and as here shown, portions of the adjoining periphery of the hand piece 6 and attachment 8 may be knurled to facilitate handling.

The opposite end 22 of the shaft I4 is extended to the adjacent end 23 of the hand piece 6 and is formed with an internally threaded bore 24 for receipt of a threaded end 26 of an axially extended stem 21 of the manicuring instrument 28, so as to join the stem end 26 and shaft end 22 for joint rotation.

The instrument 28 is formed as an enlarged disc-shaped head at the forward extremity of the stem 21, and, as will be seen from Figures 1 and 2, the stem tapers forwardly to the head 28 from a shoulder 29 formed in the forward end of the threaded stem end 26, which is reduced in diameter as illustrated in Figure 2. The hand piece is also preferably tapered forwardly to the end 23 so as to provide thereat a diameter equal to the diameter of the shoulder 29, whereby a continuous tapered surface is provided from the hand piece to the neck 3| at the rear side 32 of the head 28. Preferably the threaded end 2E of the stem is threaded rather tightly in the bore 24 of the shaft I 4 so that the manicuring instrument and its hand piece 6 will normally stay in associated relation. Connection and disconnection of the instrument to the flexible drive is accomplished by means of the threaded connection of the end 1 of the hand piece to the end pieces 8 and axially from the rear face 32 of the head. The rear face 32, as well as the front face 33, is substantially planar and circular as viewed in elevation, see Figures 1 and 4, with the planes of these sides substantially perpendicular to the axis of rotation of the member. Formed in the outer periphery of the head is an annular recess 34 having a substantially flat cylindrical base 36 concentric to the axis of the head and positioned inwardly from the outer extremities of the

sides

32 and 33. File serrations 31 are formed in the base 36, and preferably and as here'shownfthese serrations are cut directly into the base so as to provide le teeth extending in an axialI direction and arranged in spaced relation around the entire circumference of the base. As will be best seen from Figures 3 and 4, the outer extremity of these teeth is located at the bottom of the recess and within the outer periphery of the head.

The opposite sides of the recess 34 are formed by annular walls 38 and 39 which extend from the front and real` edges of the base 36 in an outward divergent fashion to the outer extremities of the

opposite sides

32 and 33 of the head, so as to define thereat thin annular rims 4| and 42.` Of considerable importance is the fact that the tapered sides 38 and 39 of the recess are left perfectly smooth, and thus function to properly guide the edge of a nail to be manicured into position upon the file serrations 31 at the base.

lThe width of the base 36 of the recess is slightly `greater than the normal thickness of a finger nail to be filed to thereby confine the nail on the' serrations without appreciable movement of the nail across such width, and the outward divergenceof the recess increases this width considerably across' the rims M and 42 so as to readily permit the insertion of the edge of the nail to be manicured into the recess, with the rims Il! and 42' straddling the nail. In placing the periphery of the head against the edge of the nail to be'manicured, the nail edge will normally engage one end of the tapered recess walls 38 and 39 and thereby guide the movement of the head into proper engagement with the edge of the nail, that is, with the nail edge squarely positioned against the serrated recess base 36. Also, the location of the file serrations at the base of the recess, surrounded entirely by smooth polished walls, positively prevents the le serrations from contacting any part of the finger or the finger nail with: the exception of the edge of kthe nail to beV trimmed. Thus the instrument, even though power driven at a relatively high rate of speed, is completely and absolutely safe in use to both the operator and the person receiving the manicure. As above noted, thetaper of walls 38 and 39 reduces the thickness of the rims 4I and 42, and preferably thetthickness of these rims is reduced sufficiently to admit the rim to the underside of the nail,particularly between the nail andits bed at the edge of the nail. In order to remove the sharpness of these rims by reason of theirfthinness, I prefer to provide the rims with a rounded, bead-like form, as illustrated in Figure 3.

As lhereinabove noted, the manicuring instrument of the present invention is designed as a companion instrumentv to the one disclosed and claimed in my co-pending application Serial No. 33,077. In that application, there is shown a rotary emery disc which is preferably used at the beginning of the manicuring operation to shape the nail into the general form desired. The emery disc may leave a slight burr along the edge of the nail, and the instrument of the present invention is ideally suited to remove this burr and provide a very nely-cut and finished edge surface for the nail. If desired, the present instrument may be used alone for manicuring the nail, or-with other types of instrument for shaping the nail. Preferably, the flle teeth 31 are relatively ne in their construction so as to provide the highly-nished edge desired.

To obtain best lresults from the tool, the head should be driven at a substantially constant speed of rotation and ,desirably the flexible drive shaft is connected to an electric motor having such a constant speed of rotation within the range of 500 to -2,000 R. P. M. Preferably, several speeds within this range should be available. to enable the operator to select the best speed for trimming and finishing the various finger nails encountered. The diameter of the head corresponding with the indicated speed range is approximately onefourth to one-half of an inch.

I claim:

l. A rotary manicuring file comprising, a disc shaped body having substantially flat front and rear sides parallel to each other and perpendicular to the longitudinal axis of said body, a stern extending axially from said rear side and adapted for connection to a rotary drive, said body being formed with a peripheral recess having a flat cylindrical base and a pair of smooth outwardly diverging side walls extending from the front and rear edges of said base, the outer extremities of said side walls joining said front and rear sides of said member in smooth thin annular rims, and file serrations formed in said base, the width of said base between said front and rear edges functioning to confine a fingernail on said serrations without appreciable movement of said nail across said width.

2. A rotary manicuring le comprising, a disc shaped body having substantially at front and rear sides parallel to each other and perpendicular to the longitudinal axis of said body, a stem extending axially from said rear side and adapted for connection to a rotary drive, said body being formed -with a peripheral recess having a flat cylindrical base and a pair of smooth outwardly diverging side walls extending from the front and rear edges of Said base, the outer extremities of said side walls joining said front and rear sides of said member in smooth thin annular rims, and a plurality of circumferentially-spaced axially extending le serrations formed in said base, the width of said base between said front and rear edges functioning to confine a fingernail on said serrations Without appreciable movement of said nail across said width.

MERRILL KESSLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 938,227 Durkee I Oct. 26, 1909 1,332,004 Rawleigh Feb. 24, 1920 2,117,053 Bickley May 10, 1938 FOREIGN PATENTS Number Country Date 11,623 Great Britain of 1910