US2894329A - Progressive scrtoer - Google Patents

Description

H. L. M DERMID PROGRESSIVE SCRIBER Filed Jan. 2, 1958 July 14, 1959 Henry L. MacDermId l4 6 INVENTOR I v O BY Q and.

Fig.3 .v w m Unit d State P cfl o T ce Patented July 14, 4959.

PROGRESSIVE SCRIBER Henry L. MacDermid, Wayne, Mich. v Application January 2, 1958, SerialNo. 706,675

2 Claims. (cras -41) This invention relates to certain new and useful improvements in a precision-type tool through the medium of which a user thereof may scribe and mark an intended surface of a work piece to assist a user of the tool in handling varying Work requirements with a minimum of difliculty.

More particularly, the invention has to do with a Structure which is characterized by the utmost in simplicity, convenience and efliciency and is capable of being economically produced and whose use enables fine measurements obtainable therefrom to be employed with extreme accuracy in keeping with the needs of the machinist or other user thereof.

The preferred embodiment of the invention is such that its use enables one to scribe horizontal lines on the surface of a work piece at desired vertical positions relative to a stationary base to in this manner serve machinists and skilled craftsmen depending on the particular job which has to be planned, laid out and efiiciently clone.

Admittedly, in the art under advisement, one may readily uncover tools and instruments for varying height gauge requirements. It follows that from the standpoint of novelty and by way of contrast with prior accomplishments, the present invention has to do with elements which do not depend upon their individual novelty but upon their unitedly producing a new and improved result, the product of their combined operation as distinguished from the mere sum of their individual construction and configuration.

Other objects, features and advantages will become more readily apparent from the following description and the accompanying drawing.

In the drawing, wherein like numerals are employed to designate like parts throughout the views:

Fig. 1 is a top plan view showing a fragmentary portion of a base or support surface, the work piece, and the improved multipurpose, progressively functioning scriber.

Fig. 2 is an elevational view which may be said to be a view of the structure seen in Fig. 1 looking at it in a direction from right to left.

Fig. 3 is a section on the line 3-3 of Fig. 1.

Fig. 4 is a perspective view of an alternate or optional base.

Referring now to the drawing and to Figs. 1 to 3, inclusive, let the reference numeral 6 designate a supsurface such as a table, bench or an equivalent stationary datum plane. At right angles thereto and rising therefrom stands the work piece 8, the surface of which is to be scribed for work planning and machine shop or other requirements.

In the form of the invention depicted in Figs. 1 to 3, the base is denoted by the numeral 10 and it comprises a metal or an equivalent flat faced block. In fact, the block is shown to be rectangular in Fig. 2. For con- 'venience, the marginal edge or surface 12 designates the top of the block while the bottom 14 is that surface which The other aligned bores are denoted at 22 and 23, and

rests on the support 6. In fact, the surfaces 12 and 14 are lengthwise surfaces while the transverse surfaces are denoted at 16 and may be placed againstthe surface6 as desired. In other words, this block may be laid lengthwise or turned around at right angles and set up onone end. Either end 16 or either of the edges 12 and .14 may be the bottom and top as is evident. As to the holes 18, these are merely cut-outs to reduce the weightof the block. The bores are denoted at 20 and 21. and-these are in registration with each other and are screw threaded.

here again these are screw threaded. There is -a center screw-threaded hole 24 which may be used if desired. Any one of these screw-threaded sockets may be eniployed to accommodate the screw-threaded shank 26 on the scribing tool mounting and clamping pin 28. This pin is formed at its upper end With a grooved head 30 forming a knob and having a milled gripping surface 32. There is also a shoulder at 34, and below this the median reduced portion is smooth surfaced and provides a spindle 36 for the hub portion 38 of the cruciform scribing tool which is here denoted as an entity by the numeral 40. The opening 42 in the hub is smooth and providesa bearing and is slipped over the spindle and clamped down against the base block by the clamping flange 34, that is, when theshank 26, performing as a setscrew, is tightened. The radial arms are circumferentially spaced at equidistant points and they are denoted by the numerals 44. All of the arms are the same in top plan, but the outer ends thereof terminate in the scribing points. There are four distinguishable scribing points 46, 48, 50 and 52. Each point has a flat top surface 54 and bevelled cooperating surfaces 56. It will be noticed in the figures that the several scribing points 46 and 52 are at varying elevations, one point being graduated to provide the measurement for one-quarter of an inch, the second one for three-sixteenths, the third as oneeighth, and the fourth as one-sixteenth.

The number of legs will be optional, and of course the degrees and graduations in respect. to height and elevation will depend on the number of legs employed.

If, instead of using the square block as a base, one prefers the octagonal block, this, as shown in Fig. 4 at 80, 58 may be employed. Here the optionally usable, flat, marginal sides are denoted at 60, the weight reducing holes at 62, and the selectively usable, screw-threaded socket or holes at 64.

In practice, the components revealed in the drawing (10, 28, 48 and 58) are treated as a ready-to-use set. Thus, the purchaser will receive, in the normally packaged set, one four-pointed scribing head 48, one primary base 10 (Figs. 1 to 3), one octagon base 58, and at least two shouldered assembling and clamping screws 28 (knurled, milled or equivalently made finger-grips), and having threaded shank portions 26 of prerequisite length and cross-section. The head is graduated in fractional parts of an inch, both top and bottom. When scribing with the head alone, place said head on any flat or plane surface with angle points pointing down. Graduations of one-sixteenth, one-eighth, three-sixteenths and one quarter inch can be scribed with these points. By turning head over (through with angle points up, one has five-sixteenths, three-eighths, seven-sixteenths, and one-half showing. Manifestly, these heights can be scribed at designated place of use. By using the smaller octagon base 58 under the head (with short shoulder screw to hold in place), one-half inch is added to these dimensions. Reversing the head on base, one-half inch is added to dimensions in sight at top.

By using the one-two-three block 10 as a base and placing the octagon block on top and scribing head at top with longer screw to hold in place, we have dimensio'ns of "one inch, "two inches, or three inches added, depending 'on-theway the block is turned. (These bases have suitable screw holes as is evident.)

The foregoingv is considered as illustrative only of the principles 'of *the invention. Further, since nur'fierous modifications and changes will readily occur re those skilled in the art, it is not desired 'tolimit the invention to the exact construction and" operation shown and de'- scribed, and accordingly all suitable modifications and equivalents may be resorted to, falling Within-the scope ofjth'e invention as claimed.

What-is 'cll'anned as'ne'w is-as follows:

1. Ain'easuring tool comprising a block having smooth flat surfaces, {provided with a plurality of selectively usable screw-threaded sockets, certain of said sock'ets b'ei'ng'axially aligned v'vith' each other and other sockets being not only axially aligned with each other but at right angles to the first-named sockets, said block constituting "a base and 'a' selected one of the fiat surfaces being adapted to rest-upon a support surface, an "assembling, adjusting and clarnping pin provided atone end with'a finger grip, provided at its opposite end with a screw thread'ed shank, having its intermediate portion enlarged in cross-section and providing a smooth-surfaced spindle, and that portion between the spindle and finger grip providing a stop shoulder, a tool head having fiat surfaces, one of which may be causedto rest firmly upon a selected fiat surface onsaid "base, also having a centrally disposed hub provided with a bearing which may be aligned with a selected one of the sockets, said spindle being fitted telescopically into said bearing and the screw-threaded shank extending beyond the adjacent surface of the hub and being removably screwed in one of said sockets, said base being of a cross-section less than the top plan area of said tool head so that portions of the tool head may be caused to project at right angles beyond adjacent flat surfaces of said base, said tool head embodying a plurality of radial arms terminating at their outer ends in scribing points, said points each being at a predetermined height above a fixed datum plane supporting said base and the elevation of each point varying in respect to the-elevation of the next adjacent point.

2. The'structuredefined inclai'm land 'wherein'said block is rectangular, has top and bottom flat surfaces, the bottom surface adapted to rest on said support, the top surface being adapted to firmly support the hub portion of the tool head which is removably superimposed thereon, said block being of a length greater than the diameter of said tool head, and said tool head being reversible whereby either primary flat surface thereof Ibriaykbe caused to rest atop the top surface'of said base References Cited in the file of this patent UNITED STATES PATENTS Storey J an. '5, 1954

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