US2508837A - Setting-up instrument - Google Patents

Description

May 23, 1950 1, w, PEFFERS 2,508,837

SETTING-UP INSTRUMENT Filed April 7, 1947 I 2 Sheets-Sheet l I m'entor Ira W. Peffers U///// M H v Attorneys y 1950 w. PEFFERS 7 2,503,837

SETTING-UP INSTRUMENT Filed April 7, 1947 2 Sheets-Sheet 2 Ira W Peffers 29 Willlull"! 19 Fig. 8. WWW

Patented May 23, 1950 UNITED STATES" PATENT OFFICE SETTINGUP INSTRUMENT Ira W. Peffers, Newark, Ohio Application April 7, 1947, Serial No. 739,865

This invention relates to a setting up instrument for precision machine work and has for its primary object to enable a machine operator who is not versed in trigonometry easily and quickly to set up work in a machine.

Another object is to conserve time in setting up precision machine work.

The above and other objects may be attained by employing this invention which embodies a plate having a reference opening therein, said plate also having an arcuate row of openings in concentric spaced relation to the reference opening, the openings in said row being spaced from one another a known number of degrees with relation to the reference opening, a stop adapted to be entered into the reference opening and a second stop selectively to enter an opening in the row of openings, whereby a straight edge laid on the plate against the stops will lie along a known angle.

Other features include heads on the stops having eccentric peripheries which may be rotated to change the angle of the straight edge in minutes and seconds.

Still other features includes indices on the heads by which the minutes and seconds may be known to the user.

In the drawings, Figure 1 is a side view of a setting up instrument embodying the features of this invention,

Figure 2 is a view similar to Figure 1 showing the instrument turned on end,

Figure 3 is a sectional view taken substant1ally along the line 33 of Figure 1,

Figure 4 is a sectional view taken substantially along the line 4-4 of Figure 1,

Figure 5 is a sectional view taken substantially along the lin 5--5 of Figure 1,

Figure 6 is a plan view of one of the stops,

Figure '7 is a view similar to Figure 6 of a cooperating stop, and

Figure 8 is a side view of the stop illustrated in Figure '7.

Referring t the drawings in detail, an angle plate designated generally I comprises legs H and I2 which extend perpendicular to one another. The bottom edge I3 and an end edge I 4 of the angle plate are smooth, true and accurate to extend perpendicular to one another and form working surfaces for the device. Extending through the leg I2 near the lower left hand corner thereof is a row of spaced apertures 15 the axes of which lie in a plane parallel with the finished edge I3 of the plate and scribed on the outer exposed face of the plate in alignment 1 Claim. (Cl. 33 -174) with the axes of the apertures are center lines I6 which extend perpendicular to the longitudinal axis of the row of apertures. These apertures l5 are spaced from one another a uniform distance and form reference openings for the reception of a stop to be more fully hereinafter described. 7

Scribed on the outer face of the plate near the edge [4 thereof andin concentric relation with their respective apertures l5 are center lines I! and formed in the plate at spaced intervals along each center line I I are apertures l8. As illustrated, there are five reference openings, and five rows of apertures i8 with the lowermost aperture I8 of the outermost row centered on the axiswhich extends through the row of apertures I5 and the other apertures I8 in the outermost row spaced from one another five degrees. The lowermost aperture in the next adjacent row is one degree above the axis of the row of apertures I5, and the succeeding apertures in the next adjacent row are located five degrees apart. The middle arcuate row of apertures starts with the lowermost aperture two degrees above the axis of the row of apertures l5 and the succeeding apertures in said middle row are likewise spaced five degrees apart. The same spacing is preserved in the next succeeding rows with the lowermost apertures respectively thereof spaced three degrees and four degrees above the axis of the row of apertures l5. It will thus be seen that provision is made for measuring a total of forty-five degrees.

A stop designated I9 is provided and comprises a shank or stem 20 provided at one end with an externally screw-threaded extension 2| upon which a wing nut 22 is adapted to be threaded. The end of the stop opposite the threaded extension 2I is provided with a head 23 the periphery 24 of which is eccentric as illustrated in Figures 1, 2 and 7 so as gradually to rise from a low point to a high point substantially 360 degrees about the circumference of the head. An annular series of indices 25 are marked on the outer face of the head to correspond with the rise thereof in seconds. The shank 20 of the stop I9 is adapted to be received in one of the openings [5 to form a reference point as will be readily understood upon reference to the drawings.

A stop designated generally 26 comprising a shank which is adapted to enter one of the openings I8 is also provided and the shank of this stop is provided with a screw-threaded extension for cooperation with a wing-nut 21. A head 28 is formed at the end of the stop opposite the screwthreaded extension and like the head 23 is provided with an eccentric periphery 29 and indices 3|] for indicating the minutes of rise as the stop is rotated in its respective aperture.

In use, the reference stop I9 is introduced into an aperture selected from the group of apertures I5, and the stop 26 is introduced into the aperture l3 corresponding to the number of degrees of angularity desired, and in the row corresponding to the row in which the reference stop is mounted. By laying a straight edge across the stops the rough approximation of the angle desired will be obtained. By rotating the stop 2-6 until an index mark is over the center line H of the row in which the stop is located, the degrees andminutes of the angle may be established. Where it i desired to measure the angle down to seconds, the stop 9 is rotated to bring the desired number of seconds as shown by the indices thereon into alignment with a mark on the straight edge which extends perpendicular to the edge contacting the stops. Byway ofexample, for instance, the reading of the device in Figure 1 is a follows: 32 degrees, '7 minutes and 15 seconds so that by laying a straight edge across the stops the angle when measured from the base 53 will be as stated above. Obviously, by moving the stop 26 to a different aperture I8, the degree of angle will be altered and likewise when the stops 1%) and 26 are rotatedin their respective openings, the angl will alsobe altered. In order to assure accuracy, it is of course necessary that the reference stop If! be mounted in an opening 15 which corresponds to the number of the row in which th stop 26 is fitted.

By the use of this device it is obvious that a vast number of angles may easily and quickl be laidout-simply by positioning the stops in their properplaces and laying a straight edge across the stops, with the minutes and seconds obtainable by the simple rotation of the stops in their respective openings.

While in'the foregoing there has been shown and described the preferred embodiment of this -five degrees apart with relation to its respective reference opening and the openings in succeeding arcuate rows bemg spaced one degree apart, a stop "removably supported in an opening in the row of arcuate openings which lies concentric with relation to the reference opening in which another stopis supported, a head on each stop having an eccentric periphery whereby a straight edge restingon the plate against the heads will.'lie substantially at a-known-angle, indices on the plate adjacent the rows of openings, and indices on the heads cooperating with those on the plate in indicating in minutes and seconds the'position of the straight edge relative to the known angle.

IRA W. PEFFERS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,534,865 Owens Apr. 21, 1925 1,637,921 Simpsonv Aug. 2, 1927 2,365,436 Saucier Dec..19, 1944 2,366,385 Comfort Jan..2, 1945 FOREIGN PATENTS Number Country Date 105,469 Great Britain 1917

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