US351672A - Samuel s - Google Patents

Description

(No Model.)

s. s. VAIL. v

SAW GUIDE.

- Patented Oct. Z6, 1886.

"Jlmmmmwi lavemtor:

UNITED STATES PATENT OFFICE..

SAMUEL S. VAIL, OF ST. LOUIS, MISSOURI, ASSIGNOR TO THE CURTIS d5 C0.

' MANUFACTURING COMPANY, OF SAME PLACE.

SAW-GUIDE.

SPECIFICATION .farming pari; of Letters Patent No. 351,672I dated October 26, 1886.

Applicationtiled March 1, 1886. Serial No. 193,702. No model.)

To all whom, it may concern:

Be it known that I, SAMUEL S. VMI., ofthe city of St. Louis, in the State of Missouri, .have invented a certain new and useful Improvement in Saw`Guides, of which the following is a full, clear. and exact description, reference being had to the accompanying drawings, forming part of this specification, and in which- Figure l is an end View ofthe guide. Fig. 2 is a side view of the guide, showing the saw and t-he timber to which the guide is attached in section at line 2 2, Fig. 1,'with top and bottom of the saw broken away. Fig. 3 is a top View of the guide with part of the saw shown in horizontal section. Fig. 4 is an enlarged vertical section at 4 4, Figs. 2 and 3. Fig. 5 is an enlarged cross-section at 5 5, Fig. 3.

This is a guide having two jawsadj ustable relatively to cach other, and also adjustable in their cannon-bearing by a single adjustingscrew.

A is part of a circular saw, and. B is one of the longitudinal timbers of the bed-frame.

C is the bearing-box of the gage-shaft, the box having lugsD, with longitudinalslots D', through which pass the screw-bolts E,by which the box C is secured to the timber B. The

,shaft is formed of two semi-cylindrical memupon the member G. Thesemi-cylindrical member F has alu g; F2, having a screw-threaded hole, in which works the adj usting-screw H. This screw may be rigidly connected with the member F by means of y a lock-nut, I, which turns on the screw, and may be made to bearv against thelug F2 for this purpose. The point of the screw H bears against alug, G2, projecting from the iiat side of the member G, so that when the screw H is moved inward in the lug F2 the jaw F is made to approach the jaw G. This lug G2 moves in a recess, F3, of the member F.

J is a hand-nut working on the screw H, and having a hand-wheel, J, by which it may be turned. The nut has a circumferenti al groove occupied by the prongs of an upright fork, K,

The jaws may be turned down in a horizontal or working position, as shown in full lines, or may be thrown upward, to disengage them from the saw, as shown in dotted lines in Fig. 1.

To hold the guide in working position, the member F has a longitudinal slot at f', which is entered by a key, N, working in a mortise of theboX C, the key being placed in its inner position, as shown in full lines, to lock the guide in working position,and drawn outward, as seen in dotted lines in Fig. l, to allow the jaws to be turned up, as aforesaid.

The operation is as follows: To set the two jaws outward or inward without changing their relative position, thelock-nut M is slacked up, the lock-nut I being tight against the lug F2. Inthis case the screw H will not turn with the hand-nut J, as it is turned in the fork K, and of course the screw and the shaft with the jaws will be moved endwise. On the other hand, when the lock-nut M is made fast against the hand-nut J, and the nut I is made loose from the lug F2, the screw H turns with the nut J, and the jaw F is moved inward or outward,

4the jaw G remaining at rest, or at least not O is a bar supporting the guide-jaws in Working position.

I am aware that one jaw of a saw-guide has been secured to and carried by a shaft, which is of cylindrical form on its exterior, excepting for adeeplongitudinal groove cnt therein for the reception of a slide carrying the other jaw, said shaft being mounted in a suitable bearing-box, and said jaws adjusted and held to the proper distance asunder by means of a setscrew tapped into one and swiveled to the other. This, however, is not the equivalent of my invention. This method of forming the shank of the guide of two parts (one member nearly cylindrical and having a longitudinal groove therein, and the other of such size and shape as to fill said groove and complete the cylindrical form of said shank) is mueh more expensive than forming the shaft of two semicylindrical members.

I claim as my invention 1. In a saw-guide, the combination, with the two jaws F and G, of the two members F and G, to which said jaws are respectively secured, the outer surface of each of said members being formed on an arc and the two uniting to form a cylindrical shaft, the lug F2, formed on the member F, and having the screw-threaded perforation, the screw H, passing through said lug, and the lug G2, formed on the member G, against which the extremity of said screw bears, substantially as set forth.

2. In a saw-guide, the combination of the jaws, a cylindrical shaft to which they are secured, having a groove, f', the two-part journal-box C, having a mortise between its meeting surfaces, the key N, fitting in said mortise and having an elongated slot or perforation, and the bolt by which the two parts of the j ournal-box are secured together passing through said slot, substantially as and for the purposes set forth.

3. In combination with the two jaws F' and G and the two members F and G, to which they are respectively secured, ofthe screw H, tapped through alng Qn one member and bearing upon the other, a hand-nut on said screw having a circumferential groove, a fork, K, engaging said groove, for confining the nut against movementandalock-nut on said screw for optionallyloeking said screw to the member For to the hand-nnt J, substantially as and for the purpose set forth.

4. In combination, the jaws F and G', the semi-cylindrical members F and G, having the groove F3 and lug G2, respectively, the lug F,

.secured to the member F, the screw H, tapped through said lug, and the handnut J, and the lock-nut M, for locking said nut to the screw,

substantially as and for the purposes set forth. 6:

SAMUE L S. VAIL.

Witnesses:

SMIL. KNIGHT, BENJN. A. KNIGHT.

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