US537411A - Machine for concaving razors - Google Patents

Description

(No Model.) 3 Sheets- Sheet 1.

H. FISCHER 8v A. RIGKENBAGHER. MAGHINB PoR GONGAVING RAZORS.

No. 537,411. PatenedApr. 9, 11395.

(Nov Model.) 3 Sheets- Sheet 2.

" H. FISCHER & A. RIGKENBAGHER.

MACHINE POB. GONGAVING RAZORS.

No. 537,411. Patented Apr. 9', 1895.

(No Model.) 3 sheets-sheen s.

H. FISCHER 8v A. RIGKBNBACHER. MACHINE FOR `COI\IGA'\I1\IG RAZORS. No. 537.411. `PatentedAprl 9, 1895.

WMM

rran STATES.

MACHINE FOR CONCAVING RAZORS.

SPECIFICATION forming part of Letters Patent N o. 537,411, dated April 9, 1895.

Application filed November 8, 1394:. Serial No. 528,233. (No model.)

To a/ZZ whom it may concerns Be it known that we, HUGO FISCHER and ADAM RIGKENBACHER, citizens of the United States, residing at Lynchburg, in the county of Campbell and State of Virginia, have invented new and useful Improvements in Machines for Ooncaving Razors, of which the following is a specification.

Our invention relates to machines for concaving razors, our purpose being to provide mechanism having a simple construction and organization, of parts whereby a razor may be quickly and accurately ground, by a barber, or by any person of ordinary experience and expertness, without requiring skilled labor and expensive mechanism, which involve the necessity of sending the razor away and incurringva considerable expenditure of time and money.

It is our purpose, also, to provide simple and novel means for locking and holding the razor in position upon the grinding-wheel and for vibrating the same uniformly in order to form the concavity desired; the vibratory movement being capable of dimin ution, or enlargement to suit the requirements of each case.

It is our further purpose to provide novel means for holding the razor upon the face of the grinding wheel in such manner that it may be ground to a true edge without danger of chipping the wheel, or mutilating the edge of the blade.

The invention consists, to the several ends specified, of the novel features of construction and of the novel parts and combinations of parts hereinafter fully described and then particularly pointed out in the claims.

To enable others skilled inthe art to which said invention pertains to fully understand and to make, construct, and use the same, we will now describe said invention in detail, reference being had, for such purpose,'io the accompanying drawings, in which- Figure 1 is a front elevation of a machine in which our invention is incorporated. Fig. 2 is a side elevation of the same. Fig. 3 is a plan view of the plate upon which the vrazor is mounted for grinding. Fig. 4 is an edge elevation of the same, the point of view being upon the right hand of Fig. 3. Fig. 5 is a plan view of the machine. Fig. 6 is a detail view of the boltand clamping devices by which the razor is held during the process of grinding. Fig. 7 is a side elevation of the grinding wheel. Fig. 8 is a diametrical section of the same.

The reference numeral 1, in said drawings, indicates the frame ofthe machine, which su pports a horizontal work-table 2 and a powershaft 3, arranged beneath the table, said shaft carrying a belt-pulley 4, which may, also, serve as a y-wheel. The shaft may be driven by any suitable power, but may also be operated by any ordinary form of 4treadle 5, having a pitrnan connection with a crank 6.

Upon the table 2 are arranged twoupright brackets 7, substantiallysimilar to each other, and in these brackets is supported a horizontal shart 8, having a small pulley 9, which is geared to the driving pulley 4 by a belt 10. This pulley is usually mounted upon the left hand end of the shaft, as shown in the drawings, and upon the other, or right hand end, is the grinding-wheel 12, the peculiar construction of which we will now explain. body of the Wheel is formed of rubber which is vulcanized in part, or not at all, so as to leave its elasticity unimpaired. Upon the periphery of this body of rubber is wound a strip of emery-cloth 13, several layers deep, the loose ends being fastened by glue, or cement. This strip may be wound upon any suitable disk, or form, other than the rubber body of the wheel, upon which it is placed when required for use. The wheel is then placed upon the shaft 8, between washers 14, which are pressed against the parallel faces of the wheel in any suitable manner, as, for example, by nuts 15. This pressure expands the rubber against the winding of emery cloth, drawing the latter perfectly smooth and causing it to adhere with great tenacity tothe rubber. It is evident that by simply releasing the rubber from the strain imposed upon it, the winding of ernery cloth may be readily removed and a new one substituted.

Upon the table 2, at a suitable point with relation to the shaft 8, is a short shaft 16, substantially parallel with it and supported in any suitable bearings 17. This shaft serves as a pivotal axis for a vibratory arm 18, provided with a slot 19, to receive the end of the shaft 16, to which it is clamped by a thumbscrew 20. The point of pivotal vibration may The lOO

be shifted within the limits of the length ofi the slot 19, thereby giving a greater or less length to said arm from the point of pivotal support to its upper end. Below said point the arm passes through a slot 21 in the table, said slot lying at right angles to the two shafts El and 16. The lower end of the arm, which lies in a vertical plane parallel with the plane of rotation ofthe driving-pulley 4, is provided with a longitudinal slot 22, in which lies a pivotal coupling 23, capable of adjustment in said slot. This coupling is connected to a rod 24, which receives a telescopin g extensionrod 25,fastened by a set-screw 2G at any point of adjustment. The lower end of said rod is connected to a ring 27 within which lies an ordinary eccentric 2S, mounted on the powershaft.

Upon the upper end of the arm 18 is a seat 29 for a mandrel 30, which lies in substantial parallelism with the shaft 8 and is rigidly tixed in the seat 20. Upon this mandrel is mounted a fiat plate 3l, of wood or other suitable material and havinga circular, or cylindrical sleeve, or opening, 32, which receives the mandrel 30 upon which said plate may be moved and turned. Upon the edge of this plate next the free end of the mandrel is a seat 33 adapted to receive a hemispherical bearing 34, through which passes centrally a rod, or strong wire 35, having at its end a keeper, or yoke 36, which lies in the bearing 34. The keeper, or yoke, surrounds a bolt 37, lying parallel with the edge of the plate, while the rod or wire 35 is at a right angle therewith and extends across the plate parallel with the mandrel, its end projecting through a bearing, or side piece, and receiving a thu mb-screw 38, by which the yoke or keeper 36 may be drawn into the hemispherical bearing 34. Upon the end of the bolt 37 is a bracket 39, having a central slot 40, on each side of which are forks 41, adapted to receive the shank of the razor blade. A rod 42, lying in a longitudinal recess in the bolt, carries a hook 43 on its end which curves over the shank of the blade lying in the forks 41, against which said hook is drawn by a thumbscrew 44, thereby clamping the razor securely in position with its blade lying against the lower face of the plate 31, the edge of the blade lying adjacent to the free edge of the plate. The arrangement of the parts is such that when the plate 3l is allowed to assume its normal position by gravity, the dat face of the razor willbe upon the grinding face of the wheel l2. The machine being set in motion, the wheel will revolve and a limited reciprocating movement will be given at each revolution of the power shaft 3 to the plate 31. The operator who sits, or stands, in front of the machine, guides the plate 31 upon the mandrel 30 by his hand, moving it in such manner as to bring every part of the blade into proper contact with the grinding-wheel.

Upon the face of the table2 are guide-ribs 45, between which a water reservoir 46 is inserted and moved until it lies beneath the Wheel 12. In this cup isa light spiral or other form of spring 47, by which a sponge 48 is held with suitable pressure against the grindA ing wheel thereby keeping the grinding face moist, preventing the razor from heating, and by its constant wiping action keeping the grinding-face always perfectly clean.

By the reciprocation of the plate 3l, through the action of the arm 18, the concave in the blade of the razor is extended in width and given the required curve, the degree of vibration of the arm being` easily adjusted to the width of the blade and the work required by shifting the points of pivotal support for the arm and of pivotal connection of its actuat- 4 ing rod. As the vibration of the arm is uniform in degree and in time, the work can readily be done in an accurate and satisfactory manner without special skill or experience previously acquired.

The mechanism described is not intended for edging razors, but for concaving them. Nevertheless, when the work approaches completion, the edge of the razor will have been ground down until it is extremely fine and it is at this point that one of the advantages of using the plate 31 will be found. Unless the blade is placed flat upon asurface similar to that of the plate 31, and immovably held by a suitable lock, the edge of the razor will catch in the grinding wheel and turn the razor over instantly, the grinding-face being frequently chipped and the thin edge of the blade mutilated thereby.

What we claim is- 1. In a machine for concaving razors, the combination with a shaft carrying the grinding wheel, of a vibratory arm mounted and adjustable on a pivotal axis parallel with said shaft, a rod adjustably connected to the lower end of said arm and to an eccentric on the driving-shaft, a plate movable longitudinally and revolubly on a mandrel carried by the u pper end of the arm and parallel with the shaft of the grinding wheel, and means for locking the razor blade to the lower face of said plate, substantially as described.

2. In a machine for concaving razors, the combination with a grinding-wheel and its shaft, of a vibratory support,aplate movable on said support in parallelism with the shaft, a sliding bolt lying in a keeper upon one side of the plate at a right angle with the shaft,a hook arranged between forked supports on the end of the bolt, and means for clamping the bolt and hook, substantially as described.

3. In a machine for concaving razors, the combination with, a grinding-wheel and its shaft, of a flat plate of wood, a vibratorysupport for said plate upon which the latter is movable in parallelism with said shaft, and means for locking the blade of the razor against the lower face of the said plate, substantially as described.

4. In a machine for concaving razors, the combination with a grinding-wheel and its IOO IIO

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shaft of a vibratorya'rm adjustable on a pivotal axis parallel with said shaft, a driving shaft, a rod extensible in length one end connected to an eccentric on the driving-shaft and the other to a coupling adjustable in a longitudinal slot in the lower end of the arm, a flat Wooden plate loosely mounted by one edge on a mandrel carried by the upper end of the arm and movable on said mandrel in parallelism With the shaft of the grinding- Wheel, a keeper having a hemispherical seat on an edge of the plate at a right angle with its line of movement, a bolt passing through said keeper, its end provided with forked supports for the shank of the razor-blade, ahook HUGO FISCHER. [L s] ADAM RIGKENBACHER. [n si Witnesses:

DAVID WALKER, JOHN M. OTEY.

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