US1365229A - Grass-mower - Google Patents

Description

R. DVORAK.

emss MOWER. APPLICATION FILED MAY 27, I918.

1,365,229. Patented Jan. 11, 1921.

INVENTOR .Ru dal vh firoral WITNESSES I 13 Mai; BY flCZMM/VLW" ATTORNEY UNITED'S TATES PATENT OFFICE.

RUDOLPH DVORAK, OF CARTER, SOUTH DAKOTA, ASSIGNOR OF ONE-HALF TO FRANK HURLBURT AND R. H. MOLITOR, BOTH OF WINNER, SOUTH DAKOTA.

GRASS-MOWER.

Application filed May 27, 1818.

T 0 all whom it may concern Be it known that I, RUDOLPH DVORAK, a citizen of the United States, residing at Carter, in the county of Tripp and State of South Dakota, have invented certain new and useful Improvements in Grass-Mowers, of which the'following is a specification.

My invention relates to a mowing machine employing a stationary finger bar and a reciprocating'knife blade, and the principal object of the invention is to provide means whereby the knife blade may be easily and quickly removed orreplaced.

Another object of my invention resides in the provision of a device of the above mentioned character including means whereby the knife blade may be lifted directly out of its retaining member, without having to slide it across the machine as heretofore.

Another object of my invention resides in the provision of means whereby the locking bar is moved upwardly away from the knife blade.

Another object of my invention resides in the provision of simple and efficient means for hinging the locking bar to the finger bar.

The invention also consists in certain other features of construction and in the are ran 'ement and combination of the several parts to be hereinafter fully described and specifically pointed out in the appended claims.

In the accompanying drawings forming a part of the description, and wherein like numerals are employed to designate like parts throughout the several views,

Figure 1 is a top plan of the invention.

Fig. 2 is an enlarged view of the. end of the pitman, with the means for connecting the same to the knife blade.

Fig. 8 is a vertical longitudinal section of the invention taken on the line 34-3 of Fig. 1.

Fig. 4 is an enlarged longitudinal vertical section through one end of the invention, to clearly illustrate the formation andconstruction of the pins and slots.

Fig. 5 is an enlarged transverse section taken on the line 55 of Fig. 1, and

Fig. 6 isan enlarged transverse section through the invention taken on theline 6--6 of Fig. 1. I

In the drawings, wherein is shown a preferred embodiment of my invention,- the nu- Specification of Letters Patent.

Patented Jan. 11, 1921.

Serial No. 236,867.

meral 1 designates the finger bar of a mowingmachine, upon which is mounteda reciprocatory knife blade 2. This blade is provided with a plurality of longitudinally extending and spaced slots for a purpose which will hereinafter appear.

The means I employ for detachably retaining the knife blade upon the finger bar consists essentially of an elongated plate 3, which extends longitudinally of the finger bar 1. When in an operative position, the locking bar normally engages the upper face ofthe knife blade'to retain the knife blade in its proper position upon the finger bar. As clearly shown in Fig. 1 of the drawings, I provide a plurality. of spaced slots 5, adjacent the rear edge of the locking bar, and these slots extend longitudinally of the locking bar. A staple-41 is provided for-each slot 5, whereby one leg of each staple may pass through each slot. As clearly shown in .Fig. 5 of the drawings, the staples are secured in the finger bar and accordingly form hinging means for thelocking barand at the same time. provides a means whereby the locking bar may execute longitudinal movement with relation to the finger bar.

The locking bar carries a plurality of spaced guards 6 adjacent its forward edge. The forward ends of these guards are reduced and bent downwardly to frictionally engage with the knife blade so as to prevent vertical movement of the knife blade during its reciprocatory movements. The guards 6 are secured to the locking bar by means of rivets 7 or the like as clearlyv shown in Figs. 1. and 3. Each guard is provided with a square opening 8 to secure therein pins 9 and these pins pass through the locking bar and extend a substantial distance below the bottom of the locking bar. The upper ends ofthe pins 9 are square and a part of the square portions pass through elongated slots in the knife blade, when the locking plate is in a locked position. Of course, these slots are spaced apart longitudinally of the knife blade to accommodate the spaced pins, and the slots are of such length that they permit reciprocatory movement of the'blade when the pins 9 extend therethrough.

The lower ends of the pins 9 are angularly arranged, as more clearly shown in Fig. 4,

and engage corresponding angularly ar ranged openings in the finger bar 1. In order; that the, locking band may; movelongitudinally upon the finger bar and swing vertically thereofon its pivot staples 4, the angularly arranged lower ends of the pins 9 and the openings in the finger bar extend longitudinally of the finger bar.

The locking bar is retained in engagement with the knife blade with its pins 9 in engagement with the openings in the finger bar, by means of the lever 11 which is pivoted between its ends to the finger, by means of the pivot 12. The forward end 13 of this lever is pivotally engaged with the locking bar, so that the bar may move longitudinally and swing vertically when the lever is actuated. A rod 14: pivotally connected by one end to the lever 11, has its other end passing through an eye bolt 15 and a coiled spring 16 is mounted upon the rod 1 1, said spring acting against the lever 11 so as to normally force the locking bar in such a position that the pins 9 are engaged with their respective openings in the finger bar.

It will therefore be apparent that this lever together with the staples 4E and pins 9 form a secure means for detachably retaining the knife blade upon the finger bar whereby the blade may reciprocate freely but is prevented from vertical or lateral movement with relation to the finger bar.

I provide the following means for connecting the pitman 17 with the knife blade 2, such means consisting of two resilient members 18 attached to or forming part of the pitman having openings 19 at the free ends thereof for engaging a lug 20 on the head of the knife blade. A cam member 21 located 011 the pitman and carrying a bolt 22 pivoted to the cam lever and 23 and assing through the members 18, serves to hold the two members in engagement with the lug, said members disengaging the lug when the cam member is swung to release its pressure upon said members 18, by means of a coiled spring 24 on the bolt 22 and located between the two members. in engagement with the pitman by means of a spring clip 25 and the bolt 22 is prevented from turning by means of a spring 26 engaging the nut 27 on the bolt. It will be seen that by swinging the lever 21 forwardly, pressure of its head on the members 18 of the pitman is relieved and the spring 2 1 forces these members apart so as to disengage the lug 20, thus freeing the knife blade from the pitman.

When it is desired to remove the knife blade 2 from the finger bar, the lever 11 is swung against the tension of the coil spring 16, which action causes the locking bar to move longitudinally of the finger bar. During this longitudinal movement, the angularly arranged ends of the pins 9 will of course move upwardly of the openings 10 in the finger bar and thereby cause the locking bar to elevate itself. However,'-the elevat- The lever is held ing motion of the locking bar will be convertedinto a swinging motion by means of the staple 4 and slot 5 arrangement. As the knife blade is relatively thin, the angularly arranged ends of the pins 9 will experience no difficulty in swinging through the elongated slots of the blade.

The foregoing description and the drawings have reference to what may be considered the preferred, or approved form of my invention. It is to be understood that I may make such changes in construction and arrangement and combination of parts, materials, dimensions, etc., as may prove expedient or fall within the scope of the appended claims.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. I11 a mowing machine, a finger bar, a knife blade mounted thereon, a lockingbar for retaining said blade in position upon the finger bar, and means for transmitting longitudinal sliding and vertical swinging movement to the locking bar for disengaging it from the knife blade.

2. In a mowing machine, a finger bar, a knife blade mounted thereon, a locking bar for retaining said blade in position upon said finger bar, a lever for movin said locking bar longitudinally of the kmfe blade, and

.means carried by the locking bar and cooperating with the finger bar for giving vertical swinging movement to the locking bar during its longitudinal movement.

8. In a mowing machine, a finger bar, a knife blade mounted thereon, a locking bar hingedly connected to said finger bar and having elongated slots therein, staples secured to said finger bar and operating in said slots, and means for transmitting longitudinal and vertical movement to said hingedly connected locking bar.

4. In a mowing machine, a finger bar, a knife blade mounted thereon, a locking bar for retaining said knife blade upon the finger bar, a lever pivotally connected with said finger bar and with said locking bar to normally retain said locking bar in engagement with said knife blade to prevent swinging movement of the locking bar, and means for elevating the locking bar from said knife blade when said lever is actuated.

5. In a mowing machine, a finger bar, a knife blade mounted thereon, a locking bar hinged to the finger bar, and means for holding the locking bar down on the knife blade and actuating said bar to disengage it from the knife blade.

6. In a mowing machine, a finger bar having a plurality of angularly arranged openings therein, a knife blade mounted thereon and having a plurality of slots therethrough to aline with the openings in said finger bar,

a locking bar hinged to said finger bar, a

plurality of pins secured to said locking bar and extending through the openings in the knife blade, the free ends of said pins being angularly arranged to fit the openings in the finger bar, and means for actuating said locking bar whereby it is given longitudinal and vertical swinging movement with relation to the finger bar to disengage the locking bar and said pins from said knife blade.

7. In a mowing machine, the combination with a knife blade having a plurality of slots therein, of a locking bar, a finger bar, means for hingedly connecting said locking bar to the finger bar, a plurality of pins carried by the locking bar and extending through the slots in said knife blade, and means for detachably retaining said pins in said slots.

8. In a mowing machine, a finger bar having holes therein, a knife blade on said bar, a locking bar having pins thereon engaging with the holes for retaining the locking bar on the knife blade, and means for holding the pins in engagement with said holes.

9. In a mowing machine, a finger bar having angularly arranged holes therein, a knife blade thereon, a locking bar having angularly arranged pins adapted to engage with said angularly arranged holes, said locking bar having slots therein, staples on the finger bar engaging with said slots, and spring controlled means for holding the pins on the locking bar in engagement with the an larly arranged holes.

10. n a mowing machine, a finger bar having angularly arranged holes therein, a locking bar having angularly arranged pins adapted to engage with the holes, staples on the finger bar, said locking bar having slots therein with which the staples engage, a lever pivoted on the finger bar and having one end pivotally engaged with said locking bar, and a spring engaging the other end of the lever for holding the locking bar with its pins in engagement with the angularly arranged holes.

11. In a mowin machine, a finger bar, a knife blade, a locking bar mounted upon the finger bar and having longitudinal and pivotal movement, locking means carried by the locking bar and adapted to be engaged and disengaged from the finger bar by movement of the locking bar, and means for preventing movement of the locking bar when in an operative position.

12. In a mowing machine, a finger bar, a vknife blade mounted thereon and a lock ing bar extending longitudinally of the finger bar and having means extending through said blade to prevent accidenta displacement of the blade.

13. In a mowing machine, a finger bar, a knife blade, a locking bar mounted on the finger bar and having longitudinal and pivotal movement, and fastening means carried between the locking bar and finger bar adapted to be engaged and disengaged by longitudinal movement of the locking bar.

14. In a mowing machine, a finger bar, a knife blade, a locking bar mounted on the finger bar and having longitudinal and pivotal movement, fastening means betweenthe locking bar and finger bar adapted to be engaged and disengaged by longitudinal movement of the locking bar, and means for securing the locking bar against longitudinal movement when in an operative position.

15. In a mowing machine, a finger bar, and a knife blade, a locking bar for holding the knife blade in place upon the finger bar, and fastening means between the locking bar and finger bar adapted to be engaged and disengaged by a relative sliding movement of the locking bar.

In testimony whereof I afiix my signature in presence of two witnesses.

RUDOLPH DVORAK.

Witnesses:

R. H. MOLITOR, F. M. HURLBURT.

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