US2187231A - Sharpening device - Google Patents

Sharpening device Download PDF

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US2187231A
US2187231A US201706A US20170638A US2187231A US 2187231 A US2187231 A US 2187231A US 201706 A US201706 A US 201706A US 20170638 A US20170638 A US 20170638A US 2187231 A US2187231 A US 2187231A
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abrasive
plunger
arm
needle
base
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US201706A
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Jr John Frei
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Jr John Frei
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/16Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding sharp-pointed workpieces, e.g. needles, pens, fish hooks, tweezers or record player styli

Description

Jan. 16, 1940. l J. FREI. JR 2,187,231
SHARPENING' DEVICE Filed April 13, 1938 5 Sheets-Sheet l Jm 16, 1940,.' J, FRE, JR v 2,187,231
SHARPENING DEVICE Filed Apg'il 13, 1938 3 Sheets-Sheet 2 J.FRE|..|R y l 2,187,231
SHARPENING DEVICE Filed April 13, 1938 3 Sheets-Sheet 3 Patented Jan. `16, 1940 l UNITED e STATES PATENT OFFICE e z,1s'z,z31
\ SHARPENING DEVICE John Frei, Jr., Chicago, Ill.
Application April 13, 193e, sen'al No. `201,706
13 Claims.
My` invention relates generally to sharpening devices, and particularly to` devices adapted for the` sharpening of hypodermic needles and the like. l l As is Well known, hypodermic `needles are pro-` vided with cutting edges disposed oblique tothe longitudinal `axis of the needle, and the bore of the needle opens through' this oblique face of the cutting edges. For various purposes, the needles are employed to pierce human flesh and tissue, and they also find common application for the piercing of animal iiesh and tissue. This particular use of the needle requires that it be provided with cutting edges meeting certain definite 15,1 requirements. That is, the cutting `,edges must be of extreme sharpness, lfree `from imperfections, serrations and roughened edges to insure that the flesh and tissue will not `be torn during insertion of the needle. Further, the cutting edges of said needle must lie in a surface angularly disposed with respect to the'longitudinal axis of the needle, and with the symmetry axis of said cutting edges lying in a vertical axial plane through the needle,
to facilitate smooth, easy entrance of the cutting gsledges into the` nesh and tissue,'thereby reducing to a minimum any unnecessary pain incident to the use of the needle.
With frequent use, the cutting edges of hypodermic needles rapidly lose their above stater of 3p perfection., It is evident, therefore, if the objectheir former state of perfection. However, the
` task of sharpening the needles presents numerous problems. ing and maintaining the oblique cutting edges of the needle in thecorrect position upon an abrasive u element during `the sharpening operation to asi sure of the axis of symmetry of said cutting edges being maintained in `the vertical axial plane through the needle for the purpose above described. Further, the particular angle which the surface, in which the cutting edges lie, makes with respect to the` longitudinal axis of the needle varies in the various sizes of needles. Secondly, this then brings up the problem of positioning and maintaining a certain size needle in `such position so upon the abrasive element during the sharpening operation as to insure imparting the correct angular position of the cutting edge surface required by such needle. In addition, large numbersy of the needles are employed in hospitals and like First, there is the problem of positionplaces, and in such places the time element involvedin sharpening the needles becomes an important factor. l
Because of various uncontrollable factors, it `is evident that manually sharpening a needle by holding it in the hand and rubbing it upon an a complexity of means for holding and adjusting both the stone and needle in cooperative sharpening relationship.
The present invention has for its principal object the provision of apparatus of simple, compact and inexpensive construction for sharpening used and worn hypodermic needles, and particularly the provisionof apparatus employing a plurality of rotatable annular abrasive elements, together with simple and compact needle supporting means capable of `receiving various sizes of needles, said supporting means being operative, with a minimum amount of adjustment, to support a needle in fixed predetermined position with respect to one of said abrasive elements, or to all of said elements in succession, to thereby sharpen thecutting edges of the needle to meet the requirements above described.
Further objects and advantages of my invention will in part be obvious and in part hereinafter pointed out, and they consist generally in the features of` construction, combination of elements and arrangement of parts which will be exemplied in the constructions to be described, and of which the scope of application will be indicated in the appended claims.
In the accompanying drawings, in which is shown the preferred illustrative embodiments of my invention, j
Figure l is a plan view of a power operated sharpening device embodying the principles of the present invention;
Figure 2 is a side elevational view of the device of Figure 1;
Figure 3 is aview, partly in vertical section and partly in end elevation, taken. substantially along the line 3-3 of Figurel; l
Figure is an enlarged vertical sectional view of a hypodermic needle; l
Figure 5 is` a `view of the needle supporting means partly in vertical section and partly in side elevation, taken substantially along the line 5-'5 of Figure 1; l
Figure 6 is a plan view of a manually operated sharpening device embodying the principles of the present invention; and
Figure '7 is a side elevational view of the device of Figure 6.
While I have referred to the devices of my present invention as being especially applicable to the sharpening of hypodermic needles, it will be evident, as the description thereof progresses, that the devices may equally well be employed for sharpening various other instruments ywherein the cutting edges lie within a surface disposedin angular relationship with respect to the longitudinal axis thereof.
Referringnow in detail to Figures 1 to 3 of the drawings, the sharpening device therein disclosed comprises a base, designated generally at 6, and preferably formed of a suitable metal, such as cast aluminum.` This base is of relatively narrow height and comprises a substantially rectangular portion 'I having an integrally formed and outwardly extending tapered tongue portion 8. Resilient foot members 9 are secured to the under surface of the base, as by means of screws Il, while the rectangular portion 'I of the lbase supports a housing I2 on its upper surface. Preferably housing I2 is of the form shown and, like the base, may be formed of cast aluminum. Adjacent one end thereof, housing I2 is provided with a curved and Substantially rectangularly shaped opening I3, this opening being relatively narrow in width, and extending in an arc from a point located substantially centrally of the front face of the housing, to a point located substantially centrally of the top wall of the housing.
Within housing I2, and seating on portion 1 of base E, is an electric motor I4which may be fixedly secured to the base in any suitable or preferred manner. The rotor shaft of the motor is suitably connected to the input shaft of a gear reduction box I5,'while the output shaft I6 of such box has a plurality of abrasive elements or wheels I1 fixedly secured thereto, as by means of the nut I8. These wheels are shown as being three in number, although a greater or lesser number may be employed. Preferably, wheels are equal in thickness and diameter to each other, and are of different abrasive qualities.' They are arranged with respect to each other to increase in coarseness from top to bottom, as viewed in Figure 1 of the drawings, and their location within housing I2 is such'that a portionof their peripheral extent is exposed through opening I3 of the housing. Rotationof the wheels is in the direction indicated by the arrow in Figure 2 of the drawings. Leads I8 connect the motor to a suitable source of current, while a switch 2|, carried by housing l2 and included in the motor circuit, controls the starting and stopping of the motor.
Spaced radially outwardly from abrasive means I1 and supported on tongue portion 8 of base 6, adjacent the outer edge thereof, is a vertical standard 22. This standard is preferably shaped as shown, and isV also formed from a suitable to the exis of the'grinding whee1s l1. sleeve 23 snugly, although not tightly, receives a plunger 24, which has rotational movement through 'a the complete arc of 360 in said sleeve, as Well as translation movement axially thereof. An annular ring 25, which snaps into an annular recess 26 formed in the outer periphery of the plunger closely adjacent one end thereof, engages one end of the sleeve for limiting axial movement of the plunger in one direction, while a supporting arm 2'! carried by the plunger closely adjacent the opposite end thereof engages the opposite end of the sleeve to limit axial movement of the plunger in the opposite direction.
Supporting arm 21 is substantially square in cross-section andis of appreciable length. It is carried in a substantially square slot 28 extending transversely through one end of the plunger, and is slidable from end to end through said slot. The arm has a relatively snug, but not tight, fit in the slot, and may be frictionally maintained in any adjusted position therein by a pin 29 disposed in an axial bore 3| in the plunger. As best shown in Figure 5, pin 29 is maintained pressed into engagement with arm 2'I by a compression spring 32 which is biased between such pin and a closure plug 33 threaded into and closing the open end of bore 3l.
Adjacent its opposite ends, arm 2'I is turned down to provide substantially conically shaped pins 34 extending axially outwardly from opposite ends of the arms for a relatively short distance. Each of the pinsare of a different diameter. At least one of the pins, therefore, will receive one of the two standard sizes of connecting heads 35 now in common use on the hypodermic needles 35. By properly adjusting arm 2'I with respect to plunger 24, the plunger may be rotated to present either of the pins 34 to the grinding wheels for the reception of its proper cooperating needle head. Any desired wheel may be employed to grind the cutting edges of the needle, axial movement of plunger 24 bringing the needle into alignment with the desired grinding wheel. The connecting heads 35 usually'have a hexagonal nut formed integrally therewith, or other similar angular faces. Leaf springs 3l', one each suitably secured at one of their ends to the opposite yends of arm 21, as by means of rivets 38, extend out over the pins 34, and are adapted to frictionally engage and bear against vone of the faces of the hexagonal nut on the connecting heads, or one of the other angular faces thereof, and to thereby prevent axial rotation of said head and needle with respect to pin 34.
As before stated, the cutting edges 36a of the hypodermic needle are disposed oblique to the longitudinal axis of the needle, and it is these oblique cutting edges which are to be sharpened or ground. In the various sizes of needles the angular position of the surface in which the cutting edges lie varies with respect to the longitudinal axis of the needle. However, the correct angular position of the surface in which the cutting edges are to lie for each particular size of needle has been scientifically determined and is known. In the instant device, the portion 39 of housing I2, which denes one edge of the opening I3 therein, is curved to conform to the curvature of the outer periphery of the wheels II, and is stamped with the indicator marks 4I. These marks correspond in degrees with the different degrees of angularity which may be given to the surface in which the cutting edges are to lie in the various sizes of needles. Knowing the required degree of angularity of the surface in which the cutting edges are to lie for a particular size needle, it is only necessary to adjust arm 21 in` plunger 24 tovallow thetip end of such needle to resten one of the grinding wheels in axial alignment withthe indicator mark corree sponding to the known degree of angularity for tates smooth, easy insertion the surface in which the cutting edges are'to lie, whereupon operation of the .device will sharpen the cutting edges of the needle and insure that such edges will lie in a surface disposed in correct l angular relationship with respect to the axis of In the manually operated device shown in Figures 6 and 7, a substantially rectangularly shaped base 42 is employed, thisbase also being prefer- `ably formed of castaluminum. As in thevdevice als of Figures 1 to 3, inclusive,` the instant form of device employs the standard 22` having the integral sleeve 23 for reception of the p1unger124,
`which carries the needle supporting arm 21', each of these elements being `constructed and operating in the manner above described. As shown, standard 22 is located adjacent one endlof base 42, to which it may rigidly besecured in any suitable or preferred manner, andwith the lon- X gitudinal axis of the sleeve extending transversely `oi thebase.
At the opposite end of the base is provided a second standard 43, similar in construction to the standard 22'; This second standard likewise has `a bearing or sleeve 44 `formed integrally with the upper face thereof, the standard being suitably rigidly secured to the base,` and with the longitudinal axis of the sleeve extending transversely ofthebase. A shaft 45 is rotatably received in sleeve 44 and, at one end, is providedv with a crank arm 46 rigidly secured thereto.` At
its opposite end, the shaft 45 has the plurality of abrasive elements or wheels I1 rigidly secured thereto, as by means of the nut 41. A sector-` shaped plate 48, having a right angle flange 49, is interposed between the wheels l1 and the sleeve 44, and is rigidly secured to the sleeve in any suitable or preferredvmanner. The upper or outer surface of ange 49 is disposed in substantially the plane of the surface of wheels l1', and is provided with the indicator marks4l. for
` the purpose hereinbeiore described. The operation of this form of deviceis substantially similar to the operation described abovein connection with the device ofFigures 1 to 3, inclusive, and it need not, therefore, `be repeated here. e
While preferred embodiments of my invention have been illustrated and described, by way of example, it will be obvious that changes may be made therein within the spirit and scope of the invention and, therefore, the invention is not to be limited to the precise forms herein described,
except insofar as they may so be limited by the appended claims.
I claim: i t 1. A device of the class described comprising 'jd-"a base, annular rotatable abrasive means supported on said base, a standard spaced from said abrasive means and carried by said base,a sleevev carried by said standard, a plunger disposed in said sleeve, said plunger being provided with af*- longitudinal bore and a transverse slot communi- `carried by said standard, a plunger having a slot eating with each other, an instrument supporting arm slidably mounted in said slot, a pin disposed within` said bore for free sliding movement therein, means normally urging said pin into contact with said arm` to automatically maintain it in 5 adjusted position within said slot, and means entirely confining said pin and said last named means in said bore.
2. A device of the class described comprising a base, annular rotatable abrasive means supported on said base, a standard spaced from said abrasive means and carried by said base, a sleeve carried bysaid standard, a plunger disposed in said sleeve, said plunger being provided with a longitudinal bore and a transverse slot communi- 15` eating with each other, an instrument supporting arm slidably mounted in said slot, a pin disposed in `said bore for free sliding movement therein, a compression spring associated with said plunger and pin and normally urging said pin into frictional Contact with said arm to automatically maintain it in adjusted position within said slot, and means entirely confining said pin and said spring in said bore.
v3. A device ofthe class described comprising a base, annular rotatable abrasive means supported on said base, a standard spaced from said abrasive means and carried by said base, a sleeve carried by said standard, a plunger disposed in said sleeve, said plunger having an axial bore extending inwardly from one end thereof and terminating in a transverse slot disposed adjacentthe opposite end of said plunger, an instru-- ment supporting arm slidably disposed in said slot and closing one end of said bore, a closure plug closing the opposite end of said bore, a pin slidably disposed in said bore, and a compression spring biased between said plug and said pin and normally urging said pin into frictional contact with said arm to maintain said arm in adjusted position within said slot.
4. A device of the class described comprising a base, annular `rotatable abrasive means supported on saidbase, a standard spaced from said abrasive means and carried by said base, a sleeve carried by said standard, a plunger having a slot therein, an arm slidably disposed in said slot for movement from and toward said abrasive means, and an instrument receiving pin extending outwardly'from each of the opposite ends of said arm, each of said pins being of a different diameter and said plunger being rotatably mounted ,in said sleeve whereby either end of saidarm and the pin thereon may be presented to said abrasive means.
5. A device of the class described comprising a base, annular rotatable abrasive means supported on said base, a standard spaced from said abrasive means and carried by said base, a sleeve therein, an arm slidably disposed in said slot for movement from and toward said abrasive means, an instrument receiving pin extending outwardly from each of the opposite ends of said arm, said pins each being of a different diameter for receiving instruments having different sizes of connecting heads, said plunger being rotatably mounted `in said `sleeve whereby either end of said arm and the pin thereon may be presented to said abrasive means, and means carried by said arm and adapted for cooperation with the connecting heads of said instruments to restrain axial rotation of said instruments with respect to said pins. i
6. A-device for sharpening instruments having cutting edges disposed oblique with respect :to the longitudinal axis of said instruments comprising a base, annular yrotatable abrasive means supported on said base, a housing enclosing said abrasive means and having an opening therein through which an instrument may be introduced to be positioned on said abrasive means, a standard spaced radially from said housing and abrasive means and carried by said base, said standard being offset to oneyside of the opening in said housing, a sleeve formed integral with said standard, an instrument supporting arm positioned in front of the opening in said housing, means connecting said arm with said sleeve, and index characters impressed on a marginal edge of said housing defining said opening and adjacent said abrasive-means whereby proper positioning of said instrument on said abrasive means may be secured to assure sharpening of the cutting edges of the instrument to lie in a surface disposed in correct angular relationship with respect to the longitudinal 'axis thereof.
'7. A sharpening device for sharpening handleless instruments having a recessed head, said device comprising a base, annular rotatable abrasive means supported on said base, a standard spaced from said abrasive means and carried by said base, a sleeve carried by said standard with its axis disposed substantially parallel to the axis of said abrasive means, a plunger carried by said sleeve, an instrumeht supporting arm permanently carried by said plunger with its major axis disposed at substantially right angles to the axis of said sleeve, said arm being adjustable with j respect to saidl plunger to thereby adjustably bridge the space between said standard and said abrasive means, and a pin of reduced cross-section carried by and projecting beyond lan end of said arm for engaging in the recessed head of `said handleless instrument.
8. An instrument sharpening' device comprising a base, annular rotatable abrasive means supported on said base, a standard spaced from said abrasive means and carried by said base, a sleeve carried by said standard, both said standard and sleeve being offset to oneside of the plane defined by said abrasive means, a plunger carried by said sleeve for axial projection into the plane of said abrasive means, said plunger having a transverse slot substantially rectangular in outline closely adjacent one end thereof, an Vinstrument supporting arm slidably mounted in said slot for movement transversely of said plunger to thereby adjustably bridge the space between the abrasive means and said standard, said arm being substantially rectangular in cross-section to conform with the outline of said slot whereby axial rotation of said arm will be restrained, and means on an end of said arm for detachably connecting an instrument thereto.
9. A portable instrument sharpening devicev comprising an elongated base plate, annular rotatable abrasive means supported upon said plate lat one end thereof, a standard mounted upon said plate at the opposite end thereof and onset to one side of the radial plane of said. abrasive means, an instrument supporting arm adapted to bridge the space between said standard and said abrasive means, and means including a plunger extending between said arm and standard and connecting said arm to said standard for rotation in a vertical plane in the plane of said abrasive means `through an arc of at least 180, whereby either end of said arm may be utilized to support an instrument in sharpening position on` said abrasive means.
10. A device for sharpening instruments having cutting edges disposed oblique with respect to the longitudinal axis of said instruments comprising a base, annular rotatabie abrasive means, means including a sleeve supporting said abrasive means on said base, a standard spaced from said sleeve and carried by said base, an instrument supporting arm carried by said standard and adjustable with respect thereto, a sector-shaped plate secured to said sleeve, and a iiange on said plate at right angles thereto and having its outer surface positioned in substantially the plane of the outer surfaceof said abrasive means, said flange having index characters thereon whereby proper adjustment of said instrument supporting arm and the instrument carried thereby with respect to said index characters will assure proper positioning of said instrument on said abrasive means to assure sharpening of the cutting edges of saidinstrument to lie in a surface disposed in correct angular relationship with respect to the longitudinal axis thereof.
11. In a machine for sharpening hypodermic needles, a plurality of coaxial grinding wheels of different abrasive qualities, a support spaced from said wheels, a plunger rotatably mounted in said support and lengthwise slidable therein parallel to the axis of said wheels, a work supporting arm slidable through said plunger perpendicular thereto toward andA away from said grinding wheels and confined against rotation relative to said plunger, means at each end of said arm for mounting a hypodermic needle thereon substantially coaxial therewith, and means carried by said arm independently of said last named means and directly engageable with said needle to conne it against turning movement relative to said arm.
12. In a machine for sharpening hypodermic needles, a plurality of coaxial grinding wheels of different abrasive qualities, a support spaced from said wheels, a plunger mounted on said support for lengthwise movement parallel to the axis of said wheels, a` work supporting arm lengthwise slidable through said plunger perpendicular thereto toward and away from said grinding wheels, means maintaining said arm in adjusted position with respect to said plunger, cooperating surfaces on said plunger and arm independent of said last named means confining said arm against rotation relative to said plunger during sliding movement of the arm relative thereto, and means for mounting a hypodermic needle on the end of said arm toward said grinding wheels and confining the needle against turning movement relative to said arm.
13. In a device of the character described, a grinding wheel, a support spaced from said wheel, a plunger mounted on said support for length- Wise movement parallel to the axis of said wheel and for turning movement about its lengthwise axis, and a Work supporting arm carried by said plunger perpendicular thereto and lengthwise slidable transversely of said plunger while mechanically confined against turning movement relative thereto during such sliding movement.
JOHN FREI, J R.
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452696A (en) * 1948-01-08 1948-11-02 Robinson R Stabler Means for dressing and repointing hypodermic needles
US2525264A (en) * 1946-09-26 1950-10-10 William A Milner Device for sharpening hollow surgical needles
US2565309A (en) * 1949-03-26 1951-08-21 Jr George W Jacoby Hypodermic needle sharpener
US2588089A (en) * 1948-10-21 1952-03-04 Inez May Custis Hypodermic needle honing device
US2663976A (en) * 1949-11-30 1953-12-29 Jr George W Jacoby Device for sharpening hypodermic needles and other instruments
US2730844A (en) * 1953-07-08 1956-01-17 Edward S Lea Machines for grinding hypodermic needles
US3037330A (en) * 1959-04-15 1962-06-05 Fidelitone Inc Autoamtic grinding and polishing machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2525264A (en) * 1946-09-26 1950-10-10 William A Milner Device for sharpening hollow surgical needles
US2452696A (en) * 1948-01-08 1948-11-02 Robinson R Stabler Means for dressing and repointing hypodermic needles
US2588089A (en) * 1948-10-21 1952-03-04 Inez May Custis Hypodermic needle honing device
US2565309A (en) * 1949-03-26 1951-08-21 Jr George W Jacoby Hypodermic needle sharpener
US2663976A (en) * 1949-11-30 1953-12-29 Jr George W Jacoby Device for sharpening hypodermic needles and other instruments
US2730844A (en) * 1953-07-08 1956-01-17 Edward S Lea Machines for grinding hypodermic needles
US3037330A (en) * 1959-04-15 1962-06-05 Fidelitone Inc Autoamtic grinding and polishing machine

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