US63948A - Improvement in bench planes - Google Patents

Description

@gnith faire atrnt @frn IMPROVEMENT IN BENCH PLANES.

@The .rlganle referat tu it tigen tetta ttent mit making and nf I'Ige nime.

TO ALL WHOM IT MAY OONCERN:

Be it known that I, CHARLES H. SAwYER, of Hollis, in the county of York, and State of Maine, have invented a new and useful Improvement in Plane Stocks; and I'do hereby declare the following to be a full, clear, and exact description thereof, which will enable others to make and use my invention, reference being had to the accompanying drawings, forming part of this specification, and in which- Figure 1 shows a sectional elevation of my invention.

Figure 2, a plan of the top of the same. l

Like letters refer to the same parts.

My invention has for its object the providing of a more convenient method than that now employed for adapting the bottom of a plane to curved surfaces, either concave or convex. In the accompanying drawings- A shows a curved handle or stock, ot' the form indicated. B, iig. 1, shows a screw passing through the centre thereofl and attached tothe piece d. The cutting-iron, of the common form, is represented at e, and held in position by set-screws, fitting into slots therein and working into the inclined portion of the piece d. The set-screws and slots are seen at t s, fig. 2. The cutting-iron also passes through an aperture in the piece 0l. This is seen in lig. 1, at n. The piece d is rmly and rigidly attached to the sheet m on its upper or inner side, at the centre'thereof. The sheet m is secured to the ends of' the curved handle or stock A by means of pivots or bolts, upon which it turns when bent. This is illustrated in fig.'1. The object of the piece d is to hold the end of the screw B and secure the cutting-iron in the manner above described. The space D is made in the curved stock or handle in order to admit ofthe insertion, adjustment, or removal of the cutting-iron e. Turning the screw B by means of the crank e, the sheet m is bent and retained in the positions indicated by the dotted lines in -fig. 1, or at places intermediate between these two.

I am aw'are of the issue of Letters Patent to George F. Evans, but his invention is di'erent from mine in several particulars.

I do not claimA a graduating plane stock, combining, with atlexible sheet of metal for the bottom, two shanks and two set-screws for bending and retaining in position the same, and the sheet being secured at its centre to the middle of the stock, and bent at the ends thereof. I am also aware of a patent granted to the same which combines, with a bearing plate, two screws, two traversing nuts thereon, and two connecting-rods, the plate bein-g attached to the stock, and being curved in a similar. manner and at the same points as the one rst mentioned. I do not claim such a method of imparting curvature to the plate, or the screws, traversingnuts and connecting-rods, by which the curvature is given. My invention, further, differs from the subject of Letters Patent granted to the same, and numbered 41,983, whichl combines with a spring-face plate the construction of two connecting-rods and their receiving parts of the stock curved. The subject of Letters Patent granted to William A. Gole, June 6., I848,.consists of an ordinary plane with a convex face cut thereupon, to which, at the centre, is attached a metal plate, which is bent by means of slides attached to the `ends thereof, said slides passing up against the front and back of thee-plane. I do not claim a device of this description. The rejected application of Simon Williams, received and filed August 12,1852, describes a plane stock, wherein the metal plate is secured to the stock at the centre thereof and at the centre of the plate, and the plate is bent by means of adjusting screws turned to the right or left and bending the plate from its ends. This is diierent from my invention in arrangement land operation, and I do not claim a device of this character. My invention is distinct from all ofthose above referred to, in having the {lexible plate united at its ends to the ends of' a curved stocln'oi` the form delineated in the drawing, and, in both, receiving its curvature and being held at any desired curve by a vertical screw turned by a crank, and the screw being connected with the plate at the piece cl.

What I claim as my invention, and desire to secure by Letters Patent, is-

The arrangement ot' the screw B, in combination with the joints or pivots by which the sheet m is connected at its ends to the ends of thehandle or stock A, as and for the purposes herein described.

CHS. I-I. SAWYER.

Witnesses:

WILLIAM H; CLIFFORD, HENRY C. HOUSTON.

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