US700293A

US700293A - Machine for grinding knives, principally those of sausage-machines or the like.

Info

Publication number: US700293A
Application number: US5504501A
Authority: US
Inventors: Otto Becker
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-04-09
Filing date: 1901-04-09
Publication date: 1902-05-20
Anticipated expiration: 1919-05-20

Description

No. 700,293. Patenfed May 20, I902. n. BECKER. I MACHINE FOR GRINDING KNIVES, PRINCIPA LLY THOSE 0F SAUSAGE MACHINES OR THE LIKE. (Application filed Apr. 9, 1901.)

' 2 SheetsSheat I.

(No Model.)

' In/mZZr 02% Zack? No. 7110,293.- Patehfed May-20, I902.

U. BECKER.

MACHINE FOR GRINDING'KNIVES, PHINCIPALLY THOSE 0F SAUSAGE MACHINES 1 OR THE LIKE.

7 (Application filed Apr. 9, 1901.) (No Model.) 2 Sheets-Sheet 2.

,2 u I 05b Banker.

THE nonms PETERS ca. PHOTO-LITHQ, WASHINGTON n. c.

' UNIT D STATES PATE T OFF ICE.

OTTO BECKER, OF BERLIN, GERMANY.-

MACHINE FOR GRINDING KNIVES, PRINCIPA'LLY THOSE-0F SAUSAGE-MACHINVESOR TH; LIKE.-

SPECIFICATION forming part of Letters Patent No. 700,293, dated May 1902.

Application filed Aprile, 1901. s a No.'55,045. (No'modeh) i v To all whom it may concern.

of the Emperor of Germany, residing and having my post-olfice address at 46 Weidenweg,

Berlin, Germany, have invented a new or Improved Machine for Grinding Knives, Prin-- had to be sent to grinding establishments,

where they were ground by hand on emerywheels. Of course it could not be avoided in this process that the knives were often burned, owing to insuflicient attention being paid to their cooling; but, above all, great skill of the grinder was required in order to produce the were often straightened exactly in the same.v correct,

manner, in consequenceyof which a cut was never produced.

The object of the present invention is to re-- move all these inconveniences. By'means of the new grinding apparatus all butchers, and even other persons without any special knowledge of grinding, are able to grind the knives without further difficulty in a mechanical Way, and so that they fulfil all conditions by which the hollow grinding of all blades of the knives is perfectly uniform whether the knife is ground on one or'both sides and independent of its construction. Burning the knives is also avoided by means of a cooling device, While formerly'the knife ,had to be held by hand against the revolving emery grindingwheel and moved to and fro, it is only necessary in the improved grinding apparatus to put'the emery-wheel into revolution,by'which the blades of the knife adjusted against the V place the knife in a holding deviceand then it Be it known that I, OTTO BECKER, asubj ect-V said wheel are all perfectly hollow ground'inv the'same manner. In order to grind the following blade exactly in the same manner as the first one, the knife need not be removed and reinserted in its holder; but by means of a simple manipulation the said following blade is put into the position previously 00-.

cupied by the first one, whereupon the grinding takes place. As all the blades of the knife are ground in exactly the same manner, they must necessarily all be perfectly uniform, and the following blades are given the same hollow grinding as the first one by'means of constantly retaining the same position of the knife against the emery-wheel.

A form of construction of the present invention is shown in the annexed drawings, in which- Figure 1 shows a side view of the grinding apparatus; Fig. 2, a plan view; Fig. 3, a front view. Fig.4: shows the adjustment'of the apparatus for the grinding of the second side of the blade of double-edged knives. Fig.

'5 is an elevation of one form of knife on an of knife, and Fig. 8 a plan view thereof. Fig.

9 is an elevation of the knife-holder, and Fig. 10 a vertical cross-section thereof. I

The grinding apparatus, which may be arrangedso as to be driven either by hand or machinery, consists of a grindstone or emery grinding-wheel, which is put into revolution and simultaneously in a to-and-fro movement by the operating-wheel, and of aholder orsupport for holding the knife, the said holder or support being movable both in a longitudinal and transverse direction.

The emery grinding wheel or stone a is suitably fixed on a shaft 1), adapted to, revolve in brackets d, placed on a foundation plate c.

The displacement of this shaftinitsaxialdh rection'corresponds to the greatest, length of the corresponding blade of the knife and is elfected by means of the following arrangerevolving in the block g. The operatingwheel 70, mounted on a shaft revolving in the bracket -i, is connected with the pulley Z by means of straps or cords, said pulley Z being fixed to the shaft Z), and simultaneously effects the revolution of the shaft h-for instance, by means of bevel-gears m and n-so that on the said wheel is being rotated the shaft 1), with the emery-wheel a, is put into a rotation' corresponding to the ratio of gear, the

shaft It, with the disk f, being also revolved at the same time, by which the emery-Wheel (t revolves and at the same time is moved to and fro in an axial direction under the influ ence of the lever 6, according to the throw of the eccentric. The blade of the knife held by the holder against the grinding-wheel is thus symmetrically ground along its whole length, and the hollow smoothness of the edge is perfectly uniform in every respect.

The knife-holder is constructed as follows: A disk 8, revoluble on a shaft 0', is arranged inclined to the emery-wheel a, the said disk .9 being arranged on a support g, which is placed on the base-plate e and which can be displaced longitudinally and transversely by means of screws 0 and p. In the said disk a screw t, having right and left hand threads, is arranged in such a manner that on said screw being turned in the one or other direction two clamping-cheeks u, the ends of which are claw-shaped and project from the disk 3, can be moved to or from each other, so that the knife '2), which is adjusted on the disk .9 and into the socket of which the claws of the clamping-cheeks a catch on turning the screw t, is firmly fixed by means of the clampingcheeks 14- being drawn apart. The disk 3 can be displaced in certain positions in sucha manner that the blade of the knife "0 which at the moment is to be ground always occupies a horizontal position with reference to the-grinding-wheel a. For this purpose holes 70, corresponding to the number of blades forinstance, fourare provided in the disk 3, into which holes a bolt a: is inserted. In addition to the knives shown in Figs. 5 and 6 others with differently-arranged sockets are sometimes used, as shown in Figs. 7 and 8. In this case the disk 3, for the purpose of enabling knives with their bladesof the lastmentioned construction to be inserted into the determined position, is not only provided with four holes to, but with eight such holes for reception of the bolt :10, so that also knives of this construction can be placed in position on the disk 3 of the same apparatus without any further manipulation.

In-order that double-edged knives, as shown in Figs. 7and 8, may be ground withouttrouble in the same apparatus, the support q, with the disk 3 thereon, can be displaced transversely to the emery grinding-wheel a by means of the screw 13. Since the hollow grinding of the said double-edged knives on the left-hand side is contrary to that of the right-hand side, the knife, after all four blades have been ground on the right-hand side, is

removed and reinserted with the left-hand side placed in position on the disk 8 against the grinding-wheel. Thegrinding-wheel is then moved until it has reached the limit of its displacement in the outward direction,whereupon the disk 8, with the knife, is brought by turning the screw 1) so far outward, as shown in Fig. 4, that the extreme edge of the grinding-wheel Ct forms a straight line with the socket of the knife, so that the blade which is placed inwardly is ground in the same manner as the outward blade in the before-mentioned single-edged knife. In order to grind all blades uniformly that is to say, all the blades to the same extent-the displacement of the disk .9 toward the grinding-wheel a is limited by suitable means-for instance, an adjustable stop or the like. A suitably-arranged water vessel serves to cool the knife, with its blades, during the grinding, in order to avoid a burning of the steel.

The operation of the apparatus isas follows: The knife is so arranged on the disk 3 that the claws of the clamping-cheeks to catch into the socket thereof, and itis then fixed by means of turning the screw 15. revolution of the disk 8 on its axle 4' a blade of the knife is brought into the horizontal position and the said disk 5 held in this posiblades-is then brought by the screw 0 against the emery-wheel and the latter put into rota-- tion by means of the wheel 7t, by which the said emery grinding-wheel simultaneously receives a to-and-fro motion through the before-mentioned eccentric lever e, in consequence of which the blade of the knife is uniformly ground along its whole length. When one blade is sufficiently ground, the support q is stopped by the stop or thelike. The said support, with the knife thereon, is then moved back somewhat by turning the screw 0 in the opposite direction. The disk 8 is set free and turned so that the following blade of the knife is brought into the horizontal position previously occupied by the first blade. disk .9 it is again brought against the grinding-wheel by turning the screw 0,-and on the said grinding-wheel being put into rotation the adjusted blade is ground in the same manner as the previous one. It can only be ground to the same extent as the first one, since the displacement of the disk 5 and the knife against the grindingwheel is limited by the abutment z or the like. When the second blade is ground, it is removed from the grinding-wheel in the same manner as the first one, and the following blade is placed in position, and so on. The blade of the knife which at the moment is inserted is cooled during the grinding in a suitable water vessel to prevent it from being burned. If the knife is a double-edged one, as mentioned After the bolting or fixing of the arranged blade is first ground instead of the above, after grinding all blades on oneside,

the knife is removed and reinserted with the other side against the grinding-wheel. Since the hollow grinding of this side is contrary to that of the side already ground, the inwardlyoutward one. For this purpose the grindingwheel is moved outwardly to the extreme point of its displacement, and the disk 3, with the knife thereon, is brought back by means of the screw 10, as shown in .Fig. 4, until the extreme edge of the grinding-wheel forms a straight line with the socket of the knife, so that on the grinding-Wheel being'rotated the same revolves and moves back, thus grinding the inwardly-arranged blade from the socket to the point inthe same manner. When this has been done sufliciently, the'abutment z is again fixed, the disk 3 turned until the followingblade occupies the position of the first one, then stopped, and the blade which at the moment is adjusted for grinding isground in the same manner asthe'previous one, and-so on for all the bladesof the knife.

It is evident thatall blades are thus ground in a perfectly uniform manner. Since the disk 8 always occupies the same position with reference to the grinding-wheel--that is to say,- all the blades always occupy the same" horizontal position with reference'to the section-of the grinding-wheel whether the knife is ground on the one or other side--and since also the displacement of the knife andof its separate blades canbe limited, a perfectly uniform grindingof all blades is obtained by means of this apparatus, which;

was hitherto impossible in-grinding by hand.

Also by means of this apparatus all incon veniences hitherto connected with the grindingof knivesin sausage-machines and the like are thus completely removed, and the said'apparatus is consequently rendered indispensable to all butchers, hotel-keepers, and the like. r

' What I claim is- 1 1-- In a machine for grinding knives of the class described, the combination with a grinding-Wheel, meansfor displacing said Wheelin an axial direction and means for revolving 5 a said wheel, 0f a knife-holder consisting of a disk revolnbly mounted at an angle to the grinding-wheel, means for moving said disk in a longitudinal and transverse] direotion','f I means forlimiting the movement'ofsaiddisk, means for holding said disk'against revolution in the desired position, andmeans for adj 'ust-' ablyholding-the knifelto be groundon' said :disk, substantially as desc ribe,d. 2'. In amachine'for grind-'ng'knives of v,the class described, t he combination withagrind-x jing-fwh eel, means for displacingsaid wheelin f I:

an axial direction and n eans for. revolving said wheel, of a knife-holderjconsisting era disk revolnbly mounted on asu'ppjort, screws for moving saidsup'port'in a longitudinal and transverse direction, astop forilimitingthe' movement of said support, a'bolt adaptedto j I i engage holes -i n said disk for holding" the lat-f,

a right and left handed screwin -said disk,-

centrically to a disk, and a shaft carrying said disk, said shaft being geared to a shaft'carryQ ing an operating-wheel, andmeans-for rotat 5 ingthe grinding-wheel shaft, consisting ofa pulley thereon, connected to said operating- ,5

wheel, of a'knife-holder consisting of a disk revolublymounted on a support, and atan angle to the grinding-wheel, screws for moving said support in a longitudinal and transverse direction, a stop for limiting the movement of said support, a bolt adaptedto -en-; gage holes in said disk forholding the latter- I against revolution in the desired position, a

right .and left handed screw in said disk,

clamping-cheeks on said screw, the jaws of which project beyond the surface of the disk and engage and adjustably hold the knife tobe ground, substantially as described.

In witness whereof I have signed this speci fication in the presence of two witnesses.

OTTO BECKER.

Witnesses:

HENRY HASPER, WOLDEMAR HAUPT.