US83736A - Improved machine for serrating- sickle-sections - Google Patents

Description

A. A. & G. F. SIM'ONDS.

Making Harvester Irons.

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Letters Patent No. 83,7 36, dated Norember 3, 1868.

IMPROVED MACHINE FOR SERRA'I'ING- SICKLE-SECTIONS.

Thesschedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

Be it known that we, ALvAX A. Srnoxns and Gnonhn I Srrronns, of Fitchburg, in the county of Worcester, and State of Massachusetts, have invented an Improvement in Machines for Serrating Sickle-Sections; and we do hereby declare that the following, taken in connection with the drawings which accompany and form part of this specification, is a description of our invention, suflicient to enable those skilled in the art to practise it.

In the manufactm'e of sickle-sections, it is, to some extent, customary to serrate the cutting-edges thereof, and our invention relates to the construction or arrangement of mechanism for cutting such serrations.

Our invention consists, primarily, in combining with a v-shaped bevel-edged anvil or bar, for suppln'ting the edge of the blank under the operation of the serrating-cutters, anda clamping-lever for confining the section in position while being cut, two sliding carriages, placed at an angle with each other, corresponding to the angle of the two cutting-edges of the sicklesection, each carriage having mounted upon it a triphammer lever or helve, carrying an adjustable cutter, and having also mechanism for lifting the cutter-stock and throwing itdown, and mechanism for imparting a feed or progressive movement to the carriage, to carry the cutter along the whole edge of the sickle-blank beneath it.

The drawings represent a machine embodying our improvements.

A shows a plan of the machine.

B, an elevation of one end thereof.

0, a front view of one end.

a denotes a main bed, at the front and centre of which is an anvil-block, b, having a v-shapcd edge corresponding to the edge of the blank or sickle-plate to be serrated.

The sickle-blank or section is shown at c, placed upon the anvil-block, and confined thereto by the front end of a clamp-lever, [1. At the opposite sides of the anvilolock are two carriage-beds or frames e e, arranged respectively in line with the two cutting-edges of the sickle-section, as shown at A, and in order that they may be made to correspond to the angle of sections of varying shape or angle, these carriage-beds are made movable and adjustable, by means of curved slots f and confining-screws 'y, as will be readily understood. Each bed or frame e'e supports a cutter-carriage, g g, sliding between guides or ways 71 towards and from the anvil-block b. In suitable bearings on each of these carriages, are mounted the gudgeons or journals 2' of a tn'p-hammer lever, k, the front end of which carries a clamp, l, for holding the stock at of a cutter, 'n, the two cutter-carriages and their cutters being so arranged that the forward movement of each carriage may carry its cutter along the entire length of the edge of the sickle-section beneath it.

Each lever extends under a cam or wiper-shaft, o, the wipers p depressing the rear end of the lever and raising its front end and the cutter as the shaft is rotated, the cutter being thrown down, when the lever is released from the wiper, by a spring, 3'. The cutterstock at is made cylindrical, and capable of turning in the clamp I, and the clamp is provided with a clamp screw, g, by which means the stock may be turned to bring the edge of the cutter n to any desirable angle with respect to the cutting-edge of the sickle-plate, and may be secured in position by turning up the screw q. One end of each cam-shaft carries the pulley, by which motion is transmitted from the driving-pulley to the shaft, and the opposite end of the shaft carries a bevelpinion, -r, meshing into and driving a bevel-gear, s, on

a screw-shaft, t, which shaft. turns in hearings n, on

the carriage y 9'.

of which are pistons or rods carrying half nuts w, the threads of which correspond with and receive thescrew-threads of the shafts t, and as both nuts are stationary while the screw-shafts are rotated, it follows that such rotation, in the direction denoted by the arrow, will cause the screws and the carriages to be fed towards the anvil-block, carrying the cutters over the two cutting-edges of the sickle-plate, simultaneously with the up-and-down or blow-giving movements of the cutters, thus causing the series of serrations or notches to be formed in the two edges of the blank simultaneously, without movement of the blank or its anvil, and without any other than the direct and intermittent forward movement of the two cutter-carriages,

' whilst, by providing for adjustment of the cutter-carriage frames or ways, and for adjustment of the cutter-stocks, sickle-sections with edges upon different angles may be properly serrated, and serrations at any angle with the cutting-edge of the blank may be made with the greatest facility upon one machine Without any change of mechanism. In connection with each trip-lever It, a spring-latch, as, may be employed with mechanism, (not shown,) which shall release the latch and allow it to spring forward under thev lever, and stop its blow-giving movements, when the cutter has reached the angle or point of the section, or blank 0, the latch being held backby suitable devices until the cutter arrives at such point, and the two cutters being thereby kept from coming into contact.

The piston-rods in the posts u rest upon springs,

and when the cutter-carriages are to be moved back, the nuts 10 are pressed down away fiom the shafts t, allowing the carriages to be slid back without rotating the shafts.

We claim the arrangement, with, the anvil-block b,

upon which the sickle-section or blank is supported and the mechanism being arranged to operate substantially I clamped, of the two cutter-carriages, at an anglevto as described.

each other corresponding to the angle of the cuttingv GEO. F. SIMONDS.

edges of the blank, each carriage having afeed-rnove- ALVAN A. SIMONDS.

ment imparted to it, and carrying a cutter having blow- Witnesses:

giving movements imparted to it, in such manner that J AMES A. FERSON, the two edges of the blank may be simultaneously or B. P. TUCKER.

alternately serrated, without movement of the blank,

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