US375892A - Horse-rake tooth - Google Patents

Description

(No Model.)

W. H. PATTI-1N.

HORSE RAKE TOOTH. P

No. 375,892. Patented Jan. 3, 1888.

Wdznesses: Invert/Z02? UNITED STATES PATENT Orrrcn.

IVILLIAM H. PATTEN, OF CANASTO'IA, NEW YORK.

HORSE-RAKE TOOTH.

SPECIFICATION forming part of Letters Patent No. 375,892, dated lanuary 3, 1888.

Application filed Novcmber 11, 1886. Serial No. 218,647.

To all whom it may concern:

Be it known that I, WILLIAM H. PATTEN, of Oanastota, in the county of Madison and State of NewYork, have invented certain new and useful Improvements in Horse-Rake Teeth; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

My invention relates to an improvement in wheel-raketeeth, hereinafter more fully pointed out and claimed.

In the accompanying drawings, Figure lrepresents a side View of my improved tooth. Fig. 2 represents an edge View of the same. Fig. 3 represents a cross-section on line A B, an?) Fig. 4 represents a cross-section on line Heretofo re rake-teeth have been constructed in oblong shape in cross-section, which has been found in use to be objectionable for the reason that they have not the required elasticity at the point where the strain comes, which produces excessive breakage in the teeth and renders the same objectionable in passing obstructions in raking; but the same for the reasons .stated have been substantially discarded. Ron nd teeth have also been provided and used for many years as less objectionable than other forms of teeth. These, however, are found in use to have points of objection, prominent among which are, first, a tendency to wear round at the point, and, second, the strain of the tooth in heavy rakingis from the point to its head, which renders it quite ob- 0 jectionable when the rake issubjected to heavy work. Rake-teeth have also been heretofore provided with flattened points having a con- (No model.)

edge of the flattened portion of the tooth in such shape that the tooth engages and holds fast to obstructions with which they come in contact, and where the front flattened portion of the tooth is broader than the rear or convex heel difficulty is encountered in raking damp or wet hay, the peculiar construction of the tooth being such that the hay will clog on the point.

For remedying the defects pointed out in other forins of teeth, whether round or oblong in cross-section throughout their entire length, I provide teeth partially round and partially flat in crosssection throughout their length, so apportioned as to give the proper elasticity to the tooth at the point where the elasticity is required and to remove the elasticity from that part of the tooth where it is objectionable. I attain these beneficial results by providing steel bars rolled or forged round in cross-see .tion throughout their length of suitable size,

the same being curved intoshape rcquiredfor use on wheel-rakes, the upper portion of the tooth having suitable convolutions,ifrequired. At about one-third the length of the tooth from the point the tooth-is widened and flattened, and the width and thickness of the flattened part are uniform through out their length, the flattened portion of the tooth being the part next to the point, thereby reducing the quantity of stock required in a round tooth in cross-section of the same length. By flattening and widening thelower portion of the tooth in cross-section the springing tendency thereof encountered in round teeth is overcome in that part of the tooth which is flattened. The flattened portion of the tooth at the point is then cut off in astraightline, forming an acute angle at the inner point of the tooth, thereby forming a wide wearingsurface, obviating the objectionable feature of the flattened point having a convex heel. By this construction the tooth is formed with front and rear lines of the curve substantially parallel with each other from the beginning of the flattened portion to the point of the tooth, thereby preventing clogging of the hay at the point of the tooth in damp raking and enabling the teeth to be freed with case from the hay when the rake is dumped.

By flattening the teeth upon their side from wearing-surface until the teeth are worn out.

\VhatI elai m as new, and desire to secure by Letters Patent, is-

1. A round curved rake-tooth flattened on its sides from near the middle toward the point, the front and rear lines of the curve substantially parallel with each other from the beginning of the flattened portion of the tooth to the point, forming a broad section, and the point out from rear to front in a straight line,

forming an acute angle on theinner frontpoint of the tooth, substantially as set forth.

2. A round spring rake-tooth flattened on its 20 sides 'from near themiddle of the tooth to the point thereof, the front and rear lines of curve substantially parallel with each other, and having the flattened end out in straight line from front to rear, forming an acute angle on 25 the front point of the tooth and awide straight wearing-surface 0n the lower end of the tooth.

In witness whereof I have affixed my signa lure in presence of two witnesses.

\VILLIAMI H. PATTEN.

"Witnesses:

EDWIN H. RIsLEY 'D. MoGUoKEN.

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