US1021795A - Stropping-machine for razors. - Google Patents

Description

A. J. POSTANS.

. STROPPING MACHINE FOR RAZORS.

APPLICIATION FILED JAN.13, 1911.

1,021,795. I I Patented Apr.2, 1912.

2 SHEETS-SHEET 1,.

Witnesses: Inventor.

W b v y A. J. POSTANS;

'S'IROPPING MAGHINE FOB. RAZORS.

Patented Apr. 2, 1912.

APPLICATION FILED JA-N.13,1911.

2 SHEETS-SHEET 2.

n3 i m we Inventor.-

Witnefiaea; I

ARTHURJAMES POS-TANS, 0F BRENTFORD, ENGLAND.

STROPPING-MACHINE FOR RAZORS.

Specification of Letters Patent. 7

Application filed January 13, 1911.

Patented Apr. 2, 1912.

Serial No. 602,384.

To all whom it may concern: I

Be it known that I, ARTHUR JAMES POSTANS, a subject of the King of England, residing at Brentford, Middlesex, England, have invented certain new and useful Improvements in Stropping- Machines for Razors, of which the following is a specification.

This invention is for improvements in or relating to stropping machines for razors and has particular reference to a machine I for stropping the loose blades of safety razors.

In carrying out this invention there is employed with opposed stropping surfaces that travel in a direction transverse to the blade during the operation of the machine, a carrier for the blade that is automatically reciprocated to bring all parts of the edge of the blade into contact with the stropping surfaces.

Preferably the stropping surfaces take the form of opposed disks operating simultaneously upon opposite sides of the blade.

As a feature of the invention mechanism is employed whereby the disks or stropping surfaces are automatically moved toward each other when the machine is driven in the direction for stropping and away from each other when the direction of drive is reversed.

This is shown as effected by mounting the disks or stropping members on pivoted arms or supports and driving them by gearing so arranged that when the gearing is driving them in one direction it tends to thrust the supports together and when it drives them in the reverse direction it tends to thrust the supports apart.

An important feature of this invention is that it includes constructions adapted to sharpen blades having either straight or curved edges. This result is accomplished by means of relatively movable blade posiillustrate a machine embodying this invent1on:F1gure 1 is a perspective view of the machine viewed from the front of the disks and with the parts in stropping position;

Fig. 2 is a perspective view of the machine viewed from the rear of the disks and with jthe parts in position for removing or introducing the blade; and Fig. 3 illustrates one of the well-known Gillette, blades of ribbon material.

Like letters indicate like parts throughout the drawings.

On a base A, two vertical supports B, C,

1 are pivoted about horizontalaxes w ac and y y respectively. The upper portions B C of the supports provide bearings for spindles B C The spindle B carries at one end a stropping disk D of leather that is mounted between two metal plates D D At the other end of the spindle is a skew toothed gear-wheel D One end of the spindle C 'similarly carries a leather stropping disk E mounted be-- tween two metal disks E E and at the other end of the spindle is a skew toothedgear-wheel E y In perpendicular standards A A on the base A a shaft F is rotatably mounted. This shaft is disposed at right angles to the spindles B C and carries skew toothed gear-wheels F F that mesh with the wheels D E respectively.

The blade carrier includes an L-shaped blade-supporting arm H and a blade-positioning bar G which carries the arm H. The positioning bar or controlling bar G is mounted to slide in a guide block A (Fig.

'1) on the base A. The edges of the positioning bar G are beveled and engage a cor respondingly undercut guideway in the guide block A The overhanging arm H constitutes a support for the razor-blade which may be of the well-known Gillette type shown in Fig. 3 and for this purpose has on it two studs H for engaging the orifices H with which these-blades are-pros vided.

That end of the sliding positioning bar G remote from the arm H has an upwardly directed portion G provided with a slot G This slot engages the shank of a screw J 1 that is carried by a toothed wheel J, which with the screw J constitutes a crank wheel.

'The wheel J is pivotally carried on a boss .A formed on one side of the standard A Carried by the shaft F and meshing with the wheel J is a smaller toothed wheel or pinion F The shaft F has at one end of it an operating handle F The operation of this machine is as follows :Presuming the parts are in the position shown in Fig. 2 where the disks D and E are separated, the blade is placed on the carrier by causing the orifices H to engage with the studs H This can be easily done while the disks are separated as plenty of room is afforded for manipulating the blade. The handle F is then rotated in the direc tion of the arrow, Fig. l, which is the stropping direction and the first movement of the wheels F F carried by the shaft F causes the pivoted or hinged supports B and (l to move toward each other, turning about their axes as and y. This movement is due to the skew teeth of the gearing, the obliquity of the teeth F being opposed to that of the teeth F for the purpose of driving the disk D in the opposite direction to the disk E. This obliquity, however, in addition to enabling the teeth to mesh with the opposed wheels D and E sets up a cam action so that the wheels D and E receive lateral thrust one toward the other, and as the supports B and C easily swing over, these will be moved before the wheels commence to rotate and thus the disks D and E will be moved toward each other and made to bear with effective stropping pressure against 0pposite sides of the blade that is to be stropped. To insure that no rotation shall take place before the supports have been swung toward each other, spring tongues B and C are employed. The tongue B is secured by a screw B to the support B and its free end enters a recess cut in the bearing B and presses against the spindle B Similarly the spring tongue C is secured by a screw C to the support C and its free end enters a recess out in the bearing C and presses against the spindle C It will be seen that the tongues B C act as friction devices whose friction must be overcome before the spindles B and C can be rotated and consequently the supports 13 and C must be displaced to the limit of their movement before the spindles will commence to rotate. The movement of the supports is arrested by the contact of the disks D and E with the blade when the blade is in position or with one another if the machine is driven without a blade having been inserted. Should the handle F 4 be rotated in the reverse direction as indicated by the arrow, Fig. 2, it will be seen that the skew gearing will operate in the same manner as before but in the reverse sense, that is to say the supports B and C will be immediately swung back away from each other, the spindles B and C meanwhile being stationary as regards rotation. It is thus impossible to cut the strop as a backward drive immediately stops the rotation of the disks and separates them, though if the backward drive be continued after the supports have reached the limit of their movement away from each other, the disks will be rotated idly in the direct-ion reverse to that for stropping. The outward movement of the support B is limited by a stop 13 which takes the form of a headed pin that extends through an orifice in the support and is carried by a stud B on the base plate A. The outward movement of the support C is limited by the toothed wheel E being brought against the standard A If desired, as indicated by its shoulder shown in broken lines (Fig. 2) the stud B may also be employed to limit the inward movement of the support B so that the plane occupied by the contacting portions of the disks D and E may always approximately correspond to that occupied by the blade on the carrier H.

It will be understood that no stop in such case would be provided to limit the inward movement of the support C, the latter being thus left free to bring the stropping disk E into proper operative relation with the other stropping disk D, the inward movement of the disk E being limited by the disk D or by the razor blade bet-ween these disks, as the case may be.

It is to be noted that the sliding positioning bar G corresponds in form to the edge of the blade, that is for example, in the blade shown (Fig. 3) the edge being straight the sliding bar G is also correspondingly straight, and whatever form the blade edge may have this rule applies, the sliding positioning bar being always correspondingly shaped in reference to the shape or contour of the edge of the razor-blade. In the machine illustrated in the drawings the straight sliding bar G of the blade carrier is reciprocated from the shaft F by means of the pinion F gear J and crank J and is guided in the guide block A to guide the straight edge of the blade H between the stropping disks D, E, according as the sliding bar G is straight and is controlled or guided by the guide blocks A Vere the carrier bar of a different shape other than straight it would be guided accordingly to correspondingly guide a similarly shaped raz0r-blade.

hat I claim as my invention and desire to secure by Letters Patent is 1. In a stropping machine for razors the combination of, two stropping member supports movable to and from operative position, stropping members movably mounted one on each support and having their stropping faces opposed to each other, driving means for the stropping members, the driving means including means whereby drivposition and driving in the reverse direction moves the supports to bring the members into non-operative position, and a carrier positioned to hold a razor-blade with its edge between and in contact with both stropping members simultaneously, substantially as set forth. e

2. In a stropping machine for razors the combination of, two supports movable t0 and from operative position, stropping members movably mounted one on each support and having their stropping faces opposed to each other, driving means for the stropping members, the driving means i11- cluding means whereby driving in one 'direction moves the supports to bring the stropping members into operative position and driving in the reverse direction moves the supports to bring the members into nonoperative position, a movable carrier positioned'to hold a razor-blade with its edge between and in contact with both stropping members simultaneously, a guide for the carrier to cause the carrier to move the blade lengthwise across the stropping members,

7 and means for automatically reciprocating the carrier on the guide, substantially as set forth. 1

3. In a stropping machine for razors the combination of, two supports movable to and from each other, stropping members movably mounted one on each support and having their stropping faces opposed to each other, driving means for the stropping members, the driving means including means whereby driving in one direction moves the supports to bring the stropping members together and driving in the reverse direction moves such supports to separate the members, and a carrier positioned to hold a razor-blade with its edge between and in contact with both stropping members si multaneously, substantially as set forth.

4. In a stropping machine for razors the combinationof, two supports movable to and from each other, stropping members movably mounted one on each support and having their stropping faces opposed to each other, driving means for the stropping members, the driving means including means whereby driving in one direction moves the supports to bring the stropping members together and driving in the reverse direction moves the supports to separate such members, am0vable carrier positioned to hold a razor-blade with its edge between and in contact with both stropping members simultaneously, a guide for the carrier to cause the carrier to move the blade lengthwise across the stropping members, and means for automatically reciprocating the carrier on the guide, substantially as set forth.

5. In a stropping machine for razors the combination of, two movable supports, stropping disks rotatably mounted one on each support with their edges opposed to each other, a carrier positioned to hold a razor-blade with its edgebetween and in contact with the edges of both disks simultaneously, driving means to rotate the strop ping disks, the driving means including means whereby driving in one direction moves the supports to bring the disks toward each other and against the blade and driving in the reverse direction moves the supports to separate the disks from the blade and from each other, substantially as set forth. 6. In a stropping machine for razors the combination of, two movable supports,

stropping disks rotatably mounted one on each support with their edges opposed to :each other, a movable carrier positioned to hold a razor-blade with its edge between and in contact with the edges of both disks simultaneously, driving means to rotate the stropping disks, the driving means including means whereby driving in one direction -moves the supports to bring the disks toward each other and against the blade and driving in the reverse direction moves the supports to separate the disks from the blade and from each other, a guide for the carrier to cause the carrier to move the blade lengthwise across the stropping members, and means for automatically reciprocating the carrier on the guide, substantially as set ,forth.

7. In a stroppingmachine for razors the combination of, two support-s movable to .and from each other, stropping disks rota-- tably mounted one on each support the edge of one disk being toward the edge of the other and the planes of the two disks being disposed parallel to the planes in which the supports move, gear-wheels carried one by each support and having operative connection with the disk carried by such support each wheel having its axis transverse to the direction of movement of the support, driving wheels carried by a part fixed relatively to the supports and so disposed that by meshing with the gear wheels on the supports they can rotate the same and simul taneously impart thrust to the supports through the wheels to move them toward or away from each other the direction of movementimparted, to each support depending upon the direction of drive imparted to its gear wheel, means for rotating the driving wheels to lmpart rotation slmultaneously 1n.

disks simultaneously, substantially as described. a

8. In a stropping machine for razors the combination of, two supports movable to and from each other, stropping disks rotatably mounted one on each support the edge of one disk being toward the edge of the other and the planes of the two disks being disposed parallel to the planes .in which the supports move, gear-wheels carried one by each support and having operative connection with the disk carried by such support each wheel having its axis transverse to the direction of movement of the support, driving wheels carried by a part fixed relatively to the supports and so disposed that by meshing with the gear wheels on the supports they can rotate the same and simultaneously impart thrust to the supports through the wheels to move them toward or away from each other the direction of movement imparted to each support de pending upon the direction of drive imparted to its gear-wheel, means for rotating the driving wheels to impart rotation simultaneously in reverse directions to the gearwheels carried by the supports, a carrier positioned to hold a razor-blade with its edge between and in contact with the stropping edges of both disks simultaneously, a guide for the carrier so disposed that in traveling along it the carrier will cause the blade to move in a direction transverse to that of the disks when stropping, and means for automatically reciprocating the carrier on the guide, substantially as set forth.

9. In a stropping machine for razors the combination of, two supports movable to and from each other, stropping disks rotatably mounted one on each support the edge of one disk being toward the edge of the other and the planes of the two disks being disposed parallel to the planes in which the supports move, gear-wheels carried one by each support and having operative connection with the disk carried by such support each wheel having its axis transverse to the direction of movement of the support, driving wheels carried by a part fixed relatively to the supports and having their axes of rotation at right angles to the axes of rotation of the gear-wheels but meshing therewith in such position that they can rotate the gear-wheels and simultaneously impart thrust to the supports through the wheels to move them toward or away from each other, the direction of movement imparted to each support depending upon the direction of drive imparted to its gear-wheel, means for rotating the driving wheels to impart rotation simultaneously in reverse directions to the gear-wheels on the supports, and a carrier positioned to hold a razor-blade with its edge between and in contact with the stropping edges of both disks simultaneously, substantially as set forth.

10. In a stropping machine for razors the combination of, two supports movable to and from each other, stropping disks rotatably mounted one on each support the edge of one disk being toward the edge of the other and the planes of the two disks being disposed parallel to the planes in which the supports move, gear-wheels carried one by each support and having operative connection with the disk carried by such support each wheel having its axis transverse to the direction of movement of the support, driving wheels carried by a part fixed relatively to the supports and having their axes of rotation at right angles to the axes of rotation of the gear-wheels but meshing therewith in such position that they can rotate the gear-wheels and simultaneously impart thrust to the supports through the wheels to move them toward or away from each other, the direction of movement imparted to each support depending upon the direction of drive imparted to its gear-wheel, means for rotating the driving wheels to impart rotation simultaneously in reverse directions to the gearwheels on the supports, a carrier positioned to hold a razor-blade with its edge between and in contact with the stropping edges of both disks simultaneously, a guide for the carrier so disposed that in traveling along it the carrier will cause the blade to move in a direction transverse to that of the stropping members, and means for automatically reciprocating the carrier on the guide, substantially as set forth.

11. In a stropping machine for razors the combination of, two supports movable to and from each other, stropping disks rotatably mounted one on each support the edge of one disk being toward the edge of the other and the planes of the two disks being disposed parallel to the planes in which the supports move, a right-handed skew-toothed gear-wheel carried by one support and having operative connection with the disk carried by such support the axis of rotation of the wheel being transverse to the direction of movement of the support, a lefthanded skew-toothed gear-wheel carried by the other support and having operative connection with the disk carried thereby, the wheel having its axis transverse to the direction of movement of the support, right and left-handed skew-toothed driving wheels carried by a part fixed relatively to the supports and so disposed that by each meshing with its respective gear-wheel on the supports they can rotate the same and simultaneously impart thrust to the supports through the wheels to move them toward or away from each other the direction of movement imparted to the supports depending upon the direction of rotation of the driving wheels, means for imparting rotary movecombination of, two supports movable to and from each other, stropping disks rotatably mounted one oneach support the edge of one disk being toward the edge of the other and the planes of the two disks being disposed parallel to the planes in which the supports move, gear-wheels carried one by each support and having operative connection with the disk carried by such support each wheel having its axis transverse to the direction of movement of the support, driving wheels carried by a part fixed relatively to the supports and so disposed that by meshing with the gear wheels'on the supports they can rotate the same and simultaneously impart thrust to the supports through the wheels to move them toward ,or away from each other the direction of movement imparted to each support depending upon the direction of drive imparted to its gear-wheel, means for rotating the driving wheels to impart rotation simultaneously in reverse directions to the gearwheels carried by the supports, a retarding device for one of the rotatable parts carried by one of the supports, and a carrier positioned to hold a razor-blade with its edge between and in contact with the stropping edges of both disks simultaneously, substantially as set forth.

13. In a stropping machine for razors the combination of, two supports pivoted so that their free ends can swing toward each other, stropping disks rotatably mounted one on the free end of each support the edge of one disk being toward the edge of the other and the planes of the two disks being disposed parallel to the planes in which the supports swing, gear-wheels carried one on the free end of each support and having operative connection with the disk carried by such support each wheel having its axis transverse to the direction of swing of the support, driving wheels carried by a part fixed relatively to the supports and so disposed that they mesh with that side of the gear-wheels which is remote from the p1vots about which the supports swing, means for rotating the driving wheels to impart rotation simultaneously in reverse directions to the gear-wheels carried by the supports, and a. carrier positioned to hold a razor-blade with its edge between and in contact with the stropping edges ,of bothdisks simultaneously, substantially as set forth.

14. In a stropping machine for razors the combination of, two supports pivoted so that their free ends can swing toward each other, stropping disks rotatably mounted one on the free end of each support the edge of one disk being toward the edge of the other and the planes of the two disks being disposed parallel to the planes in which the supports move, a right-handed skew-toothed gear-wheel carried at the free end of one support and having operative connection with the disk carried by such support the wheel having its axis transverse to the direction of swing of the support, a left-handed skewtocthed gear-wheel carried at the free end of the other support and having operative connection with the disk carried by such support the wheel having its axis transverse to the direction of swing of the support, skewtoothed driving wheels one right and the other left-handed carried by a part fixed relatively to the supports and so disposed that they mesh with that side of the gearwheels on the supports that is remote from the pivots of the supports, means for rotating the driving wheels simultaneously in one direction, and a carrier positioned to hold a razor-blade with its edge between and in contact with the stropping edges of both disks simultaneously, substantially as set forth.

15. In a stropping machine for razors the combination of, two supports pivoted so that their free ends can swing to and from each other, spindles rotatably mounted one in the free end of each support their axes of rotation being transverse to the direction of swing of the supports, stropping disks fixed one on each spindle the edge of one disk being toward the edge of the other, gearwheels fixed one-on each spindle, driving wheels carried by a part fixed relatively to the supports and so disposed that by meshing with the gear wheels on the supports they can rotate the same and simultaneously impart thrust to the supports through the wheels to swing them toward or away from each other the direction of movement imparted to each support depending upon the direction of drive imparted to its gearwheel, means for rotating the driving wheels to impart rotation simultaneously in reverse directions to the gear-wheels carried by the supports, and a carrier positioned to hold a razor-blade with its edge between and in contact with the stropping edges of both disks simultaneously, substantially as set forth.

16. In a stropping machine for razors the combination of, a base, two upright supports pivoted to the base at their lower ends so that their free ends can swing to and from each other, spindles rotatably mounted one in the free end of each support the axis of rotation of the spindles being transverse to the path of swing of the supports, stropping disks mounted fast one on each spindle the edge of one disk being toward the edge of the other, gear-wheels mounted fast one on each spindle, a shaft supported from the base and situated with its axis of rotation transverse to the axes of the spindles, driving wheels on this shaft so disposed that by meshing with the gear-wheels on the supports they can rotate the same and simultaneously impart thrust to the supports through the wheels to swing them toward or away from each other the direction of movement imparted to each support depending upon the direction of drive imparted to its gear wheel, means for rotating the shaft to impart rotation simultaneously in reverse directions to the gear-wheels carried by the supports, a third gear-Wheel mounted on the shaft, a toothed crank-wheel meshing with this third gear-wheel, a movable carrier positioned to hold a razor-blade with its edge between and in contact with the stropping edges of both disks simultaneously, a guide for the carrier, and a connection between the carrier and the crank-wheel to reciprocate the carrier on the guide, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARTHUR JAMES POSTANS. lVitnesses A. M. HAYWARD, HARRY B. BRIDGES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.

Images