US624749A - Fourths to oscar l - Google Patents

Description

No. 624,749. Patented May'9, I899.

- J. A. BURB.

LAWN MOWER.

(Application filed Sept. 8, 1898.)

(No Model.)

I! II! III NTED STATES PATENT OFFICE.

JOHN ALBERT BURR, OF AGAWAM, MASSACHUSETTS, ASSIGNOR OF THREE- FOURTI-IS TO OSCAR L. KING, OF SAME PLACE.

LAWN-MOWER.

SPECIFICATION forming part of Letters Patent No. 624,749, dated May 9, 1899. Application filed September 8, 1898. Serial No. 690,464. (No model.)

To aZZ whom, it may concern.-

Be it known that 1, JOHN ALBERT BURR, a citizen of the United States of America, and a resident of Agawam, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Lawn-Mowers, of which the followingis a full, clear, and exact description.

This invention relates to improvements in lawn-mowers of the most common type, comprising traction-wheels and a rotary cutter or shear operating in conjunction with a fixed bar relative to which the curved knife of the rotary cutter has shearing actions.

The object of my invention is to provide a casing which wholly incloses the operatinggearing so as to prevent it from becoming choked by the grass or clogged by obstructions of any kind.

The improved lawn-mower is illustrated in the accompanyingdrawings, in which- Figure 1 is aplan and partial horizontal section of the machine, Fig. 2 being a side elevation with a portion of one of the side cheek members broken away for clearer illustration.

Similar characters of reference indicate corresponding parts in both Views.

A A represent the traction-wheels, fixed on the end portion of the shaft B, outside of which are the cheek-plates or castings C C, the yoke and handle D being provided in the usual manner for pushing or drawing the lawnmower.

The traction-wheels are constructed with comparatively wide rims and with a web or spokes a uniting the hub portion thereof with the rim, the hub portion a being comparatively narrow, so that the circular portion 1) of each cheek-plate may be well disposed within the cup-like traction-wheels.

Each cheek-plate C has the forward portions d d thereof outwardly offset, as more plainly seen in Fig. 1, these standing consid* erably outwardly beyond the outer faces of the traction-wheels and support between them the cen tral shaft f of the rotary cutter G, which comprises the shearing knives or blades h, constructed as usual, with the exception that they are unusually long, being longer than the distance between the outer faces of the wheels A A. These cheek-plate extensions (1 cl also support between them the counter-shaft z' and the fixed bar j of the cutter, and the groundroller k is hung in the adjusting-arms m m.

Loosely mounted on the shaft B is the gearwheel 0, having as a part thereof the ratchetwheel 0 a spring-pawl 0 provided on the inner face of one of the'traction-wheels, engaging in the teeth of said ratchet-wheel o for causing the rotation of the said gear-wheel o in unison with the turning of the tractionwheels when the latter roll forwardly as the machine is pushed in its work.

The gear-wheel p on the counter-shaft z' is in mesh with the gear-wheel 0, wheel 10 being of less diameter than the one 0, whereby the forward rotations of the latter will cause faster rotation of the wheel 19 and the counter-shaft, which has also thereon, near its outer end, the gear-wheel g, which is in mesh with the gearwheel 23, affixed to the arbor or shaft f of the rotary cutter.

The cheek-plate extension cl at one side of the machine is formed chambered, as seen at d the same comprising the inner wall or face 10 and the marginal rib 12, against which latter the cap-plate 13 is screwed or otherwise secured, and a casing in the form of a chambered shell or casting (indicated at u) is provided to inclose the gearing at p 0 0 &c., the same being supported upon the shafts B i, as seen in Fig. 1.

By makingthe side cheek-plates with the forward extension members (1 d decidedly outwardly offset beyond the outer faces of the traction-wheels provides for the mounting between the forward ends of the checks of a rotary cutter having a length quite a little exceeding the distance between the outer faces of the traction-wheels, and hence it becomes possible to cut the grass more closely to a building or other object than would be possible were the ends of the rotary cutter disposed within the planes coincident with the outer faces of the said wheels, and it will be seen that in the use of the machine its every pass will cut. the grass in a path wider than that comprised between the traction-wheels, so that the disadvantage of havingone of the wheels bed down the grass just outside of the cut path or swath at every pass is overcome.

Having thus described my invention, what I claim, and desire to secure by Letters Patto extend into the: recesseson t-heouter sides ent, isof the wheels, and which: cheek-plates are pro- In a lawn-mower, the shaft B, the driving vided with the outward extensions, the gears Wheels secured thereto and having recesses q, t, secured to the ends of the shafts '21, f, and

5 formed in their sides, the shafts i, f, extendthe cap-plate 13, which closes over the gears,

ing parallel with the shaft B, thegearso, 19, sesubstantially as specified.

cured to the shafts B', 'i, the pawlland ratchet, Signedby me, at Springfield, Massachusetts,

and the casing at which incloses the gears; and this 31st day of August, 1898.

has the circular flange upon its inner side eX- JOHN ALBERT BURR. 1o tending into the recess of the Wheel A, COIII- Vitnesses:

bined with the cheek-plates which form bear- OSCAR L. KING, ings for the shafts B, i, and which 'are made WM. S. BELLOWS.

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