US518670A - Lawn-mower - Google Patents

Description

(NoModel J 2 Sheets-Sheet 1-. M. O. HENLEY.

LAWN MOWER Patented Apr. 24, 1894.

2 Sheets-Sheet 2. (Men M. 0. HENLEY. 4

LAWN MOWER. No. 518,670. Patented Apr. 24, 1894.

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UNHE mares ATENT OFFICE.

MICAJ AH C. HENLEY, OF RICHMOND, INDlANA.

LAW N M o w E R.

SPECIFICATION forming part of Letters Patent N 0. 518,670, dated April 24, 1894. Application filed December 15, 1893. Serial No. 493,749. (No model.)

To all whom, it may concern:

l 3e it known that I, MICAJAH O. HENLEY, a citizen of the United States, residing at Richmond, in the county of Wayne and State of Indiana, have invented certain new and useful Improvements in Lawn-Mowers, of which the following is a specification.

My invention relates to lawn mowers, and consists in various features hereinafter set forth and claimed.

In the drawings-Figure 1 is a perspective view of one of the side plates of a lawn mower, constructed in accordance with myinvention,

.the cutter-shaft and the fixed knife being shown in transverse section; Fig.2, an inside face view of the same with the box for the cutter-shaft, and with the fixed knife and knife bar in section; Fig. 3, a perspective view of the parts separated; and Fig. 4, an under sideview of the cap of the cutter-shaft bearing.

A indicates one of the side plates or frames of a lawn mower, which has on its inner face a horizontal box B, which is adapted to support the brass box or bushing O which encircles the cutter-shaft D. This box B is made concave and is provided, at front and back, with bearing faces a and b; and is also provided with a depression 0 in its concave face.

The brass box or bushing G which fits the concave seat in the box B, is slotted 1engthwise in order that it may be adjusted circumferentially to compensate for wear as hereinafter described, and is provided with two lugs d and e, the former of which engages the depression 0 formed in the upper or concave face of the box, as shown in Fig. 2. The upper lug c engages or is seated in an elongated socket e formed in the removable cap E which is applied to the upper side of the bushing when the latter is in its seat. This cap E bears upon or is supported at its forward end upon the face 0b of the box B, see Fig. 2, while its rear end carries an adjusting screw F which bears upon the face I). Screw F engages a nut f, which, as shown in Figs. 2 and 4., is seated in a socket 9 formed in the under side of the rearpart or portion of the cap E,- the said nut being held against turning by the socket, while the screw, which passes freely through the cap, may be turned so as to project more or less below the face of the engages a nut 'i seated in a suitable socket j formed in the underside of the overhanging portion of box B, as clearly shown in Figs. 2 and 4; the said adjusting screw being adapted and arranged to bear upon the upper face or top of the cap E, and is capable of being turned while the nut remains at rest. Upon the upper face of the cap E is formed a lug it, which, by bearing against theinner end of the overhanging box B, limits the approach of the cap toward the plate A.

Now, in order to adjust the bearing (comprising the bushing C and cap E) bodily relatively to the side plate, in the direction of the axis of the shaft, it is only necessary to turn the screw G backward so as to release or relieve the pressure exerted upon the cap by the screw. After the machine is assembled,

are firmly clamped in position upon the plate or casting A.

After a machine has been used some time, the inner ends of the bushings wear, and thus permit a limited longitudinal play of the cutter-shaft, and to compensate for and take up this wear, it is only necessary to move the bushing inward until its inner end bears against the hub of the cutter. The bushing is peventedfrom being moved inward or outward too far by means of the socket e, Fig. 3, which, while of a width greater than the lug e, is of not such width as to permit an excess of movement. The bushing cannot be moved lengthwise, however, until both screws F and G are turned back or released to relieve the bushing from the pressure transmitted through the cap.

In order to take up or compensate for the wear on the journal or end of the cutter shaft, andon the inner face of the bushing, it is only necessary to open or close the bushing, 7

end of screw will bear upon the surface Tb,-

7 I of the lug d with the depression preventsthe bushing from turning duringthis operaro tion.

When the machine is assembled at the fan tory, the inner end of the bushing is flush with the inner end of the box B,the lug e and socket 6' being so arranged as to preclude the bushing from being moved outward t beyond the inner end of the said box.

the cap E, at the front side, is a lug Z to bear upon the face a of the box or arm 13, so that when the screws F, G are tightened up, the

cap may be securely adjusted without being mashed or crushed out of shape as would occur were the cap to bear orrest squarelyupon the box or arm B. r

The bushing may be used either on the right or on the left side plates A, thus avoiding the necessity for different forms of bushmgs.

When a bushing is worn, it may be thrown away andreplaced by a new one'with but 0 little work. t t

The knife-bar H is provided at its ends (only one end being shown) witha conical or rounded boss m which fits a corresponding socket n in the inner face of the plate A, and through these parts is passed a bolt 1, by

means of which the kni fe-bar is pivotally connected to the plates or frames A. Projecting from the inner face of plate A, above the hole or socket n, is a pair of lugso 0, thelower one 7 40 of which is flanged asf'at 19, Figs. 2 and 4;, to held against turning the nut qjfwhicfh receives a screw J, the screw, as shown in Figs; 1 and 2,

passing freely between and held in position by said lugs. This screw J is designed to project through thenut q,and to bear upon a rib or flange r formed on the head or outer end of theknifebar; Theupperend of the I rib or flange is slotted as 9 at s Figs. 2*and 4, to receive ascrew K carryinganutt, which nut, by bearing against theiface of the plate A, is prevented from turning withthe screw. The screw K is adapted to bear against a flange or abutment u, Figs. 1,2 and 3, formed inthe side plate or frame A. I By turning the screw K through the fixednnt t,the knife-bar 5 will be rocked or tipped upon its pivot bolt 1,;

andafter the desired adjustment of the bar it has been effected, it is held securely in its prop'erposition byturning the screw Jfirrnly against the flange i".

' From the foregoing description it will be noted thatamost completeadjustment cra e cutter-shaft bearlng bymeans'of ascrew p knife-bar, and p of i he, may lee-readily efiected driver, as all the adjusting screws are within It willalso be observed that no 7 part of the side frames or,plates requires tapeasy reach.

ping for the reception of the adjusting screws,

all of which engage wrought iron or steel nuts By thus I which can be'bought at small cost.

avoiding the'formation of screw threaded holes in the frames or castings A, much time and labor are saved, and the cost of manufacture materiallyreduced.

Heretofore when the threads in the plates or frames became stripped, it was necessary to throw the plates away; but under the present construction, if either the screws or the nuts become injured, they can be replaced at slight cost without reference totheside frames. Having thus described myinventiomwhat I claimfis 1. In a lawn mower, the combination with theside frame or plate having the box B with the depression a therein; of a cap E; a slotted bushing 0 provided with lugs 01 and e; and

the screw-F carried by the cap and having a nut 7.

2. In a lawn mowenthe ,combination with the side frame or plate having the box B; of the capE provided with socket e; and bushing C'provided with a lug e of less width than the socket whereby longitudinal adjustment i 1 is permitted. v,

' 1 3. In a lawn mower,

the combination the sideplate or and e; a cap appliedlto the bushing; a screw Fand nutfforjexpanding the bushing; and f ascrew Grand nu t for holding the cap and bushing in plac i l In witness whereof I hereunto set my ha Witnesses:

W. E. BELL, F. H. WrLLIAMs.

frame havingbox l3 withfa depressionctherein; of a slotted bushing Q; seated in said box and providedzwith lugs d

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