US778185A - Lock-lever. - Google Patents

Description

No. 778,185. PATENTED DBO. 20,1904

' W. s. GRAHAM.

LOOK LEVER.

'APPLIOATION FILED FEB-18, 1 904. H0 MODEL.

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UNITED STATES Patented December 20, 1904.

PATENT OFFIcE.

ILLINOIS, ASSIGNOR TO PARLIN a WILLIAM s. GRAHAM, or CANTON,

ORENDORFF COMPANY, OF CANTON, ILLINOIS, A CORPORATION OF ILLINOIS.

LOCK-LEVER.

SPECIFICATION forming part of Letters Patent No 778,185, dated December 20, 1904.

Application filed February 18, 1904- Serial No. 194,264.

and control the cultivating appliances from his seat.

The cultivating appliances of a lister-cultivator are usually extended to the rear of the lift-levers, and consequently they are raisedbyaforward pull. The cultivating-frames are two rows apart, orabout seven feet between centers, and this throws the lift-hitches out of reach of the driver. A forward thrust on the lift-hitches is an inconvenient movement for the driver to make, the natural and effective movement being a backward pull,

and if lift-levers fulcrumed on horizontal pivots are turned toward the driver with sufficient obliquity to bring them within operative reach the lifting force will .be applied indirectly or torsionally, with a tendency to twist the lever and cramp the fulcrum.

This invention provides an oblique lever fulcrumed on a pivot at right angles toits length and adapted to develop a forward lift by a backward pull. It also gets the lift end of the lever sufficiently high to connect properly with the cultivating appliances.

. The invention is not of necessity confined to lister-cultivators, as there may be other environments in which it would have utility. It is exemplified in the structure hereinafter described, and it is defined in the appended claims.

In the drawings forming part of this specification, Figure 1 is a side elevation of the lever, showing the bearings infsection. Figs. 2 and 3 are elevations in a plane at right angles with the plane of Fig. 1. In Fig. 2 the lever is shown in an intermediate position, and in Fig. 3 it is shown in an extreme position.

A bracket 1 provides a horizontal fulcrum 4 for the lift-arm 8. It provides an oblique fulcrum 2 for the lever 6, and it has a sectorformed rack 3 concentric with fulcrum 2. The lift-arm 8 extends upward from its ful-- crum in the bracket. Its swinging end 10 is adapted to engage a lift-rod, and it has a segment of a gear-wheel 9 formed on its inner face between its ends and concentric with its fulcrum. Thelever 6 has a lock-bolt 11,which engages the notches of rack 3, and its power v end is toothed, as shown at 7 to engage the teeth 9 of arm 8. Lugs 5 on bracket 1 provide means for securing the bracket to the cultivator-frame. The lever 6 is of the first class as levers are usually classified, and arm 8 is a lever of the third class.

I claim i 1. In a'compound lever the combination of a lift-arm having a segment of bevel-gear between its fulcrum and its lift end, a locklever fulcrumed obliquely with reference to the lift-arm, and a segment of bevel-gear on the workend of the lock-lever in mesh with the gearof the lift-arm. r

2. In a compound lever, the combination of a bracket having two lever-fulcrums and a rack-sector, the fulcrums being'non-parallel, a lift-arm pivoted on one of the fulcrums and extended toward the other fulcrum, a segment of gear on the lift-arm, a lock-lever pivoted on the other fulcrum, and a segment of gear on the work end of the lock-lever in mesh with'the gear of the lift-arm. In testimony whereof I sign my name in the presence of two subscribing witnesses.

' WM. S. GRAHAM.

Witnesses:

GEORGE O. EGGLESTON, MARSHALL N. KIRKIIUFF.

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