US1994422A

US1994422A - V-block

Info

Publication number: US1994422A
Application number: US733437A
Authority: US
Inventors: John R Sasek
Original assignee: LS Starrett Co
Current assignee: LS Starrett Co
Priority date: 1934-07-02
Filing date: 1934-07-02
Publication date: 1935-03-12
Anticipated expiration: 1952-03-12

Description

J. R. SASEK- March E2 W35 V-BLOCK Filed July 2, 1954 2 Sheets-Sheet 1 flay e183)?! John E d'aselr March 12, 1935. J,, R SAsEK 1,994,422

V-BLOCK Filed July 2. 1934 2 Sheets-Sheet 2 avwwwr Jam 1%.,

Patented Wiar. 12, 1935 STATES John R. Sasek, Ed 1 e,lll.,assignortc'rhe I. S. Starret Campy, Athol, Mass... a cor poration of husetts Application July 2, 1934, s No. recast 5 These blocks are made with detachable, ad-- justable U-shaped clamp members and are generally square or oblong blocks milled out with difierent sizes of v-shaped openings. Such blocks have been made invertible so as to give two-or more, or in a well known type of block,.

four work clamping faces substantially X-shaped in cross section, to increase the range of stock diameter that can be accommodated.

Whenever the clamp is used simply as a clamp or as a guideftheproblem is to hold the block on the bench, lathe, machine platen or mag-- netic chuck. This is done usually by the me chanics clamp, but such a holding basis was clumsy and cumbersome and not adapted'to varieties of positions or postures oiwork.

My concept includes a novel one of versatile .posture so that the same block can be readily held in 'difierent positions and at relative angles of working axes. This I accomplish by a.

simple departure from the present blocks by providing for a clamping at a stepped end at, right angles to the main top V-groove and for varied posture mountings so that even a simple two v-block may be used for a great variety of work and at difierent angles, for any of the usual operations, such as filing, stampmygrinding, laying out or driving pins, where the machinist desires to hold a round or irregular piece of stock.

The forms shown in the accompanying drawings are practical interpretations of'my invention and well adapted to manufacture on a production basis. These forms are to be understood as advantageous but not shown as limit- In the drawings:-- a Fig. l is a general view of a work block in accordance with my invention with clamp dev I Fig. 2 is a w. i-mtic section suggestive ofthe distribution oi lines of iorce'or resultants. Fig. 3 is an end view. 5 Fig. 4 is a side view of the block shown in Fig. 1 with clamp removed... 59 Fig. 5 is a plan view with the claim) in position on the and step, and 1 v Fig. 6 is a central longitudinal section through the block showing the threaded attachment and clearance apertures. a I In the forms shown the blocks consist preferablyof relatively long base portion 1 made thin at a waist line orvalley 2 between it and the upper portion 3.

As shown in the drawings, this upper portion 3 is shorter than the base portion 1 and more 6 nearly square except that it is provided with a top V-e'roove 4 as in the old home-made machinists blocks.

The top of the upper portion 3 is shouldered as at 5 and extends as an undercut beneath the 10 jaw of the V as at 5 This provides a. slideway' for the usual clamp member 10 but brings its foot 11 in close to the central perpendicular of the V-cut 4. The foot '11 has a flat bottom or face which bears .on the upper surface 5 15 and is slidably adjustable along it. u

This makes a-strong clamp assembly as the foot 11 of the adapted conventional inverted U- clamp 10 (see diagrammatic indication Fig. 2)

lies not only on the top of the upper block por- 0- tion 3 seas to be slidingly supported along its upper surface, but its foot end 11 presents a close pllel support to the v face 4. In fact, as I have indicated at X (Fig. 2) the foot end 11 may be made with an angular face parallel to 2 the face of the V cut 4. The clamping pressure P'is applied by a screw 12.or any other substitute clamping means.

In the drawings I have shown a boss 10 (Fig. 1) tapped to receive the clamp screw 12 when 30 the block is being leveled on a flat surface. It will be-noted that the upper portion 3 is otless width so that when the block is laid on its side the screw 12 when positioned as in Fig. 3 may be used to level the whole block relative to any 35 surface. carries out geometrically because as indicated in Fig. 2 any larger (or smaller) piece of shaft or stock will have its center C still in the vertical axis ofthe v. Mechanically this is the lineof thrust P of the screw 12 of the slidabie and shiitable clamp frame 10.

Thebase portion 1 has its stepped end 13 pro-' vided with the usual v notchld. Its end face 15' is also provided with an undercut 1s ior the -43 ciamp end 11 as shown in Fig. 5, and suggested 111118. 1. 'This'latter figure is intended to indie cate the interchangeability oi the clamp 10 from top to end position on the block.

' While my base portion 1 may be i down by contact with the persurface iblf'cf' the valley or'the tr or the block or by con em: w en- 1a, however, to increase the range of usei of my new block I provide for other postures and PATENT OFFICE ace 1c at theijend manners of mounting. For example, shown at 30, 31 and 32 (best observed in Fig. 6) I provide threaded apertures for clamp bolts conventionally indicated in Figs. 3 and 4 which might be used to clamp the'block to a usual angle iron or tool maker'sknee suggestively indicated in fragmentary section at K in Fig. 4. The tapped apertureao is carried through at 30a and the tapped aperture 31 is also carried through at 310; as indicated at Fig. '6. The clearance 3111 particularly provides for knocking pins out or work while clamped in; the groove 4.

'ifhe design. of the present V-block provides for .a-wide, range of work posture in the lathe-or. the

drill press or work table or on the usual angle iron or tool maker's knee. The blocks are'ofsirnpie design and can be produced almost as cheaply as the old types. I i

The v or other shaped work receiving recesses 4 or' 14 may be of any size desired or may as portion, and extending at least at one end beyond the adjacent end of the upper portion and forming a step therewith, said extended base portion having a V-"groove in the end thereof and also having adjacent undercut grooves to accommodate the foot portions of a work clamp, the

upper portion having a v-groove in the top thereof disposed at right angles to said first mentioned V-groove and also having adjacent undercut grooves to accommodate the foot portions of a work clamp, the clamp receiving grooves of the upper portion and of the end extension of the base portion being of a depth and spacing to interchangeably accommodate a single work "clamp. 2. A work holder as-set forth in claim 1 in which a groove is formed in the sides of the block and across the end thereof remote from the 'end extension of the baseportion and provides a shoulder extending along each side and across the last mentioned end of the block to be engaged by rilieans for clamping the-block to a support.

3.;Awork holder comprising a block including la portion and an upper portion, the base portion' being of greater length than the upper portion and extending at one end beyond the adjacent end of the upper portion and forming a step therewith, the opposite ends oflthe base and upper portions being flush with eachother, said extended base portion having'a V-groove in the end thereof and also having adjacent undercut grooves to accommodate the foot portions of a work clamp, the upper portion having a V- groove in the top thereof disposed at right angles l' to said first mentioned V-groove and also having adjacent undercut grooves to accommodate the foot portions of a work clamp, said block, below the last mentioned grooves, havingside grooves and a groove in the end thereof remote from the end extension of the base to provide a shoulder extending along the sides and across the last mentioned end of the block, flush with the top surface of the end extension or; the base portions to be engaged by means for clamping the block to a support.

JOHN R. SASEK.