US758558A

US758558A - Grinding-machine for grinding harvester-knives or other tools.

Info

Publication number: US758558A
Application number: US7048501A
Authority: US
Inventors: Moses C Nixon
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-08-01
Filing date: 1901-08-01
Publication date: 1904-04-26
Anticipated expiration: 1921-04-26

Description

PATBNTED $1 11.26, 1904.

M. G. NIXON. I GRINDING MACHINE FOR GRINDING HARVESTBR KNIVES OR OTHER TOOLS.

APPLICATION FILED AUG. 1, 1901.

K0 MODEL.

- fio en 01" TM Wiirzesr .363

' ratented. April 26, 1904.

UNITED STATES PATENT OFFICE.

MOSES o. NIXON, or FORT WAYNE, INDIANA.

GRINDING-MACHINE FOR GRlNDING HARVESTER-KNIVES OR OTHER TOOLS.

SPECIFICATION forming part of Letters Patent N0.- 758,558, dated April 26, 1904.

Application filed August 1, 1901.

To all whom, it Wmy concern.- I

Be it known that I, Mosns O. NIXON, of the city of Fort Wayne, in the county of Allen and State of Indiana,have invented certain new and useful Improvements in Grinding Machines for Grinding Harvester-Knives or other Tools, of which the following is a specification.

My invention relates to that class of grinders in which a rotating grinding-wheel is automatically oscillated in contact with the knife.

My invention consists, essentially, of the means for oscillating the grinding-wheel, in certain details of construction whereby the grinding wheel maybe held in a fixed position when desired, and in the means provided for clamping the knife, substantially as hereinafter more specifically described and then definitely claimed.

Figure 1 is a perspective view of my improved machine. Fig. 2 is a perspective detail of the bell-crank lever by meansof which the grinding-wheel is oscillated.

A is the base-plate upon which are supported" the standards B,on which is journaled the driving-shaft G. On this driving-shaft is secured the main driving gear-wheel D, provided with the operatinghandle E; Upon the shaft is. placed a sleeve F, carrying the cam G and the lock-wheel H. The sleeve is ordinarily held.

in driving connection with the shaft by means of the cotter-pin I.

Secured to the upper end of one of the standards B is a bracket J, extending over the upper part of the lock-"wheel In this bracket is formed a hole a, through which may be inserted the cotter-pin I to engage any one of the' notches or openings 6, formed in the rim of the lock-wheel H. Thus the sleeve after being released from its drivingconnection with the shaft C by the withdrawal of the cotterpin I may be held in any desired position.

The cam G works within a long slot 0, formed in the upwardly extending arm of the bellcrank lever K, which lever is pivoted on the shaft L, carried by the standards B. The other arm of the bell-crank lever K is provided with .holes (2, so that the lower end of the link M- may be adjustably secured thereto. The other end of this link is pivoted on the cross-bar N,

carried by the arms 0, pivoted on the shaft C.

Serial No. 70,485. (No model.)

At the other end of these arms the shaft of the grinding-wheel Q, is journaled.

To the shaft P is secured a gear-pinion R, meshing with the main driving gear-wheel D. The knife carrier comprises a plate S, ad justably secured to the base A by means of the bolt a passing through a slot f in the plate S and the base A. Lugs g are formed on this plate S, and on these lugs is pivoted the rocking frame T. The lower part of this rocking frame is provided with the lugs h, extending both forwardly and backwardly and slightly inclined upward, so as to permit of the frame T having a small backward and forward rocking motion. Secured to this frame is the knife frame U, preferably adjustable on the frame T by means of the bolt c' passing through the slot j in the rocking frame 'T. This knifeframe is provided with the horizontal portion is, from which extend vertically the clamplugs holding the knife. These are three in number. One,fl, at the right-hand side of the machine extends upwardly in front of the knife V and is bent'over and extends partway down behind the knife, as shown by dotted lines. The downwardly extending portion must, however, stop before it reaches a position in which it would interfere with the free passage of the eye or its extending rib, usually formed at one end of'a knife for connection with the driving mechanism of the harvester or mower. Another clamping-lug, m,

-extends upwardly behind the knife and is cut away, as shown, to permit of the passage of the rib of the eye on the knife already referred to. The third clamp-lug, n, is in front of the knife between'the lugs Z and m and nearer to the latter. Upon the clamping-lug Z in front of the knife is pivoted the cam-lever 0, by means of which the knife is securely clamped against the downwardly-projecting part of the lug Z and also against the lug m. The lug n resists the pressure of the grinding-wheel when the machine is in operation.

It will be noted that the lug "n is cutaway to provide free passage for the bar p on the knife. The clamping-lug Z is also cut away or formed of suflicient width between the two parts to permit of the free passage of this .bar. For convenience the terms back and Too front in reference to the knife-holder are used to correspond and agree with the same terms used in relation to the machine. The side of the knife referred to in the specification and claims as the back is the side which is uppermost when the knife is in use, and the side that is referred to as the'front is the side which is undermost when the knife is in use.

I find my arrangement of the clamping device very simple, effective, and convenient. The knife is easily slid in from the right-hand side and is quickly clamped in any desired position by swinging the cam-lever 0 toward the left and as quickly released by swinging it to the right. By an upward pull on this lever the knife is brought into contact with the grinding-wheel during the operation of grinding.

It is preferable to have an additional steadying lug or stop on the horizontal portion Z: of the knife-frame behind the knife and adjacent to the outer side of the lug Z.

The reasons for providing the adjustments by means of the bolts 6 and Z are too obvious to require setting out.

The means employed for holding the grinding-wheel in a fixed position by withdrawing the cotter-pin I and engaging it with the bracket J and the locking-wheel H is an important feature of the invention, as the grinding-wheel is thus very quickly and easily secured at any desired height for the purpose of grinding out notches in the knife or when it is desired to use the apparatus as an ordinary grindstone.

What I claim as my invention is 1. In a grinding-machine the combination of a suitably-journaled driving-shaft; a sleeve loose thereon; means for forming at will a driving connection between the shaft and the sleeve; a cam fast on the said sleeve; a lever pivoted on the frame of the machine and adapted to be oscillated by the said cam; arms suitably pivoted at one end; means whereby the oscillatory movement of the lever is conveyed to the said arms; a grinding-wheel journaled on the said arms; means for rotating the said wheel from the driving-shaft; a lock-wheel fast on the aforesaid sleeve; and means for locking the said wheel to somestationary part.

2. In a grinding-machine the combination of a suitably-journaled driving-shaft; a sleeve loose thereon; means for forming at will a driving connection between the shaft and the sleeve; a cam fast on the said sleeve; a bellcrank lever pivoted on the frame of the machine and having one arm slotted for engagement by the said cam; arms suitably pivoted at one end; a link pivotally connected with the other arm of the bell-crank lever and with the said arms; a grinding-wheel journaled on the said arms; means for rotating the said wheel from the driving-shaft; a lock-wheel fast on the aforesaid sleeve; and means for locking the said wheel to some stationary part.

3. In a grinding-machine the combination of adriving-shaft; asleeve loose thereon; a pin forming a driving connection between the sleeve and shaft; a cam fast on the said sleeve; a lever pivoted on the frame of the machine and adapted to be oscillated by the said cam; arms suitably pivoted at one end; means whereby the oscillatory movement of the lever is conveyed to the said arms; a grinding-wheel journaled on the said arms; means for rotating the said grinding-wheel from the drivingshaft; a lock-wh eel fast on the aforesaid sleeve and having holes or notches formed therein; and a bracket with a hole therein extending from some stationary part in proximity to the lock-wheel so that a pin may be inserted through the hole into one of the holes or notches in the-lock-wheel.

4. In a grinding-machine the combination of a driving-shaft; a sleeve loose thereon; a pin forming a driving connection between the sleeve and shaft; a cam fast on the said sleeve; a bell-crank lever pivoted on the frame of the machine and having one arm having holes formed therein for engagement by the said cam; arms suitably pivoted at one end; a link pivotally connected with the other arm of the bell-crank lever and with the said arms; a grinding-wheel journaled on the said arms;

means for rotating the said grinding-wheel 5 from the driving-shaft; a lock-wheel fast on the aforesaid sleeve and having holes or notches formed therein; and a bracket with a hole therein extending from some stationary part in proximity to the look-wheel so that a pin may be inserted through the hole into one of the holes or notches in the lock-wheel.

5. In a grinding-machine the knife-frame U provided with the horizontal portion k, the clamping-lug m engaging the back of the knife V, the clamping-lug n engaging the front of the knife; and the clamping-lug Z extending up in front of the knife and bent down to engage the back of the knife, in combination with the cam-lever 0 pivoted on the front of the clamping-lug Z.

6. In agrinding-machine the knife-frame U provided with the horizontal portion Z2, the clamping-lugm engaging the back of the knife and cut away to admit the rib of the eye of the knife; the clamping-lug n engagingthe front of the knife; and the clamping-lug Zextending up in front of the knife and bent down to engage the back of the knife above the continuous part thereof, in combination with the cam-lever 0 pivoted on the front part of the clamping-lug Z.

7. In agrinding-machine the knife-frame U provided with the horizontal portion 7."; means connected with the horizontal portion it near one end to support both'the front and back of the knife; and the clamping-lug Z extending up in front of the knife near the other end of the said horizontal portion and bent down to engage the back of the knife.

' at one end; a'link pivotally connected with the other arm of the bell crank lever and with the said arms; a grinding-wheel journaled on the said arms; and means for rotating the said wheel from the driving-shaft.

9. In a grinding-machine the combination of a suitably-journaled driving-shaft; a cam having a driving connection therewith; a bellcrank lever pivoted on the frame of the machine and having one arm slotted for engagement by the said cam; arms suitably pivoted at one end; a link having an adjustable pivotal connection with the other arm of the bellcrank lever and with the said arms; a grinding-wheel journaled on. the said arms; and means for rotating the said wheel from the driving-shaft.

10. In a grinding-machine, the combination of. a suitably-journaled driving-shaft; a cam having. a driving connection therewith; a bellcrank lever pivoted on the frame of the machine, and having one arm slotted for engagement by the said cam; arms suitably pivoted at one end, and suitable connections between the bell-crank lever, and the said arm; agrinding-wheel journaled on the said arms; and means for rotating the said wheel.

11. In a driving-machine, the combination of a' suitably-journaled driving-shaft; a cam loose thereon; means for forming at will, a driving connection between the shaft and cam; a lever pivoted on the frame of the machine, and adapted to be oscillated by the said cam; arms suitably pivoted at one end; means whereby the oscillating movement is conveyed to said arms; a grinding-wheel journaled on the said arms; means for rotating the said wheel from the driving-shaft; a lock-wheel attached to said cam; and means for locking the said wheel to some stationary part.

' Toronto, July 25, 1901.

MOSES C. NIXON.

In presence of JOHN G. Rinoirr, J. W. VVEBs'rER.