USRE8323E - Improvement in insertible saw-teeth - Google Patents

Description

UNITED STATES PATENT OFFICE.

'ARREN l?. MILLER, OF BROOKLYN, NE'W YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TOR. HOE CO. l

IMPROVEMENT IN IN'SERTIBLE SAW-TEETH.

Specification forming part of Letters Patent No. 58,664, dated October 9, 1866 Reissue N0. 8,332.5, dated July 9, 187B application tiled June 24, 1878.

To dll whom tmay concern:

Be it known that I, WARREN P. MILLER, formerly of the city and county of San Francisco, and State of California, now of the city of Brooklyn, county of Kings, and State of New York, have invented a new and Improved Mode of Attaching Teeth vto Saws; and I do hereby declare that the following is afull and exactdescription thereof, reference being had to the acconipaiiyin g drawings, making a part of this speciiication.

The object of my invention is to have a sawtootli of such forni that it can be cheaply and perfectly madc-a tooth that can be made in duplicate with perfect accuracy, that is stron g, has plenty of room for the chip, and will not choke or clog with dust; and a cavity or seat in the saw-plate of a shape to tit said tooth, which latter is self-attaching and adjustable without the use ot' a forge.

My invention consists, first, in an insertible tooth for saws, when said tooth is constructed upon'cireular lines comprising more than one hundred and eighty degrees of a circle, and inserted into a cavity in the saw-plate of a shape to fit said tooth; second, a cavity or seat'in a saw-plate for holding an iiisertible tooth, when constructed upon circular lin s comprising more than one hundred and eighty degrees of a circle.

In the drawings, Design No. 1 is a segment of a saw for splitting, showing two teeth and their cavities or seats. Design No. 2-repre seiits a segment of a saw with the teeth tiled for cutting oil'.

Circular cavities or seats are formed in the saw-plate by means of a suitablecutter, forniing a V in the inner edge, and at an angle ot' forty-five degrees, said seats or cavities being cut on circular lines coinprisin g more than one hundred and eighty degrees of a circle, so as to retain the teeth inserted in thesanie.

Circular pieces of steel are prepared for the teeth a little larger than is required. XVlien .lnislicd, they are pierced in the center, then placed ona `niandwl andy turned in a lathe, and a V-groove cut out. That part of the circle between the lieel a and the point of the toothj' is eut away. 'lliey are then pierced at c, tempered, and are ready to insert in their cavities or seats in the saw-plate. The teeth are pierced at c for the purposeof inserting a pin, by vwhich they maybe turned in their seats.

In Design No. 1, Figure No. lyrepresents 'a tooth set for work. Fig. No. 2 represents a tooth as being inserted into the cavity or seat prepared in the saw-plate. So inuch of the groove in the cutting end ofthe tooth'as, when in position, projects beyond the cavity or seat in the saw-plate is eut away, allowing it to come within the V on the inner edge of the cavity or seat, asl shown. A hole is cut in the edge of the vtoothfwhich, when it c oincides with one of a series of holes, bib b, made' in the saw-plate, has inserted through it a rivet, c, to prevent the tooth from being' forc'ed back. The series of holes b b b are made in the saw-plate for rthe purpose of inserting rivets at different distances as the tooth is turned forward, as it becomes necessary from time to time as the point of the tooth is worn away.

Fig. No. 3 represents a slit cut in the pe# ripliery ot the saw-plate centrally between the teeth, the front side being on a line with the radius, the opposite side being roundedl olf, as shown at d. The object of the abovedescribed cavity is for the purpose of receiving and carrying fol-,ward any dust that may escape the precedingA tooth.

In Design No. 2, Fig. No. 1 represents a tooth worn and filed away, so that it occupies but little more than lia-lt' of 'the circle, and is not capable of being again adjusted.

Figs. Nos. 2 and 3 represent teeth set inv the proper position for work, each iilod from opposite sides. Fig. No. 5 shows a seat in the plate prepared for a tooth with aVgrooviil in its outer edge.,A Fig. No. et represents a tooth as being inserted in the cavity or 'seatprepared in the saw-plate.

NVhat I claini as my invention, and desire to secure by' Letters Patent, is-

l. An iusertible tooth for saws, when said tooth is constructed upon circular lines coin.- prising more than one hundred aud eighty degrees of a circle, and inserted into a cavity yGIP-Heat in the sew-plate of :JJ-shape t0 t Said In testimony whereof I I have signed `mu` toth, substantially as specified. name to this specification in the presence of 2. A Cavity o1' seat in a. saw-plate for heldtwo subscribing witnesses. ing an 'linsertible tooth, when constructed upon WARREN I. MILLER. circular lines comprising more than one huufitnesse-s: l

dred and eighty degrees of a circle, substan- H. T. MUNSON,

tiallyas specified. GEO. H. GRAHAM.

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