US2233715A - Ruler - Google Patents

Description

March 4, 1941, T, REA 2,233,715

RULER Filed Oct. 25, 194C ll ame- "Hull.

llLEilllu.

IN V ENTOR.

ATTORNEY.

the musical staff for musical notations.

Patented Mar. 4, 1941 UNITED STATES PATENT OFFICE RULER Thomas Rea, Detroit, Mich. Application October 23, 1940, Serial No. 362,307

-" 4 Claims.

The object of my invention is to provide a simple, durable and accurate ruler for the pur pose of producing a plurality of lines disposed in parallel to each other and known commonly as The purpose of the invention is to be serviceable in making stencils for the production of such staffs, particularly the production of double stafis for musical notations. By means of my invention it is possible to draw accurate, properly spaced lines. Should it appear that one line is not distinct, it is quite possible to draw another line on top of the first one and the lines will cover each. other without the danger of producing double lines where only one line was intended. This assurance of producing accurate single lines is enhanced when a special stylus, of the kind hereinafter described, is used with my ruler. It will be understood that the ruler may be used not only for the purpose of making stencils but that it may be also used for making lines with pencil, pen, or some other marking instrument.

Another purpose of my invention is to provide a ruler which will serve in spacing the staffs from each other, also provide an equal spacing between double staffs, as when staffs are coupled for notation of piano music. I shall now describe my invention more accurately with reference to the accompanying drawing, in which:

Fig. 1 shows a perspective view of my improved ruler.

Fig. 2 shows a side view of my invention.

Fig. 3 shows an enlarged sectional view on line 33 of Fig. 1.

Fig. 4 shows a fragmentary view of a stylus, preferably to be used with my invention for making lines.

Similar numerals refer to similar parts throughout the several views.

It will be seen on reference to the drawing that my ruler is a combination of a T-square ordinarily used by draftsmen, with a plurality of rigid bars spaced from each other and affixed to the long blade II of the T-square, in which the head is indicated by numeral I0 and in which numeral I2 indicates screws connecting the head of the T-square with blade I I. The longitudinal bars indicated individually by numeral I5 form two clusters or sets I3 and I4 of six bars each. In order that they be properly spaced from each other, leaves I 6, all of equal thickness, are interposed between said individual bars at each end thereof. It must be stated that each bar has two apertures at each end, all the apertures being aligned with respect to each other and with respect to apertures in other adjoining bars. It is by means of these apertures that said bars may be held together by means of bolts, as will be stated below.

The lower set I3 is held together by bolt ll, of

which I8 indicates its head. Said bolt is threaded into the elongated blade II of the T-square but the set is spaced from. the blade by a nut IS. The next set, I4, is supported by the lower set I3 by means of a threaded bolt I9, of which the head is indicated by numeral 20. Nut 2|, seated upon said threaded bolt I9, is disposed next to the topmost bar I5 of the lower set I3, while the upper set is held on said bolt between nuts 22 and 23. The whole set I4 is disposed at a certain distance from the lower set I3.

In addition thereto and above the two sets I3 and I4, my invention comprises a guide bar 24. This is substantially of the same kind and length as bars I5, although its purpose is different. This bar 24 is seated upon bolts 25, which extend from the lowest bar of set I4, upwardly, through apertures in said bars. Said bolts 25 are secured in a fixed position with respect to set I4 by means of nuts 21 and 28. Guide bar 24 in turn is secured in place upon bolts 25 by means of nuts 29 and 30. The construction, therefore, of my ruler is such that blade II of the T-square supports the first set I3 of bars I5. The first set I3, by means of bolts I9, supports the second set I 4, which in turn supports the guide bar 24 by means of a threaded bolt 29.

When staffs are to be made with the aid of my ruler, the head II) of the T-square, employed in the conventional manner, assures the operator that staffs, when completed, will be properly placed on the stencil with respect to its edges.

The lines on paper composing each staff are made by means of the stylus shown in Fig. 2, in which numeral 32 is the recording loop, while members 33 serve to guide said loop 32. 3| indicates the handle of the stylus. When lines are to be made, say, on a stencil blank, the T-square is laid fiat upon the blank, the edge of the stencil is held parallel with head II], whereupon the recording loop 32 of my stylus is inserted between the first two bars adjoining blade II of the T- square, in such a manner that guide members 33 will be disposed on the outer sides of said two bars. A line is then drawn by means of said stylus along the whole length of said bars. On completion of the line, the stylus is withdrawn and other lines are made in the same manner between respective bars I 5. Ordinarily, in absence of said guide members 33, individual bars I5 would be likely to bend under the pressure of the stylus so that were a line to be retraced there would be the danger that instead of one, two lines would be made, one next to the other. Because in the drawing of the individual lines said guide members 33 engage two bars at the same time, there is no danger of any bending and thelines produced by means of the stylus are always single, even if the stylus is drawn back and forth and the line is retraced a few times. It is in this manner that the staffs are made, that is, one stafi of five lines above another staff of five lines, with a definite distance between said staffs. When another double set of stafis is to be made, the guide bar 24 of my ruler is placed on the stencil blank over the lowest line of the lower staff, the position of the ruler is righted by means of head of the T-square,

and again the stencil is ruled, as above said.

The guide bar 24 serves the purpose of securing uniformity of spacing one double stafi from another. It may be desirable at times to have said spacing increased or decreased. This is easily done, as said guiding bar 24 is held on threaded bolts 25 by means of nuts 29 and 30. These nuts may be readjusted and the bar may be either moved further from or closer to the i set It. Similarly, since the last set of bars is also secured by means of nuts on threaded bolts l9, it is possible to move the whole set away from the lower set l3 or closer to it, as the case may be, simply by readjusting said nuts. It will be understood that the ruler is not only intended for the purpose of making stencils, but it may be equally well used on ordinary paper or other recording means.

Having thus described my invention and realizing that some changes may be made Without departing from the principle disclosed herein, What I wish to claim is as follows:

1. A ruler of the kind described as comprising a T-square, a plurality of ruling bars evenly spaced from each other, and a guiding bar spaced from said plurality of ruling bars, said ruling bars and the guiding bar being affixed to the blade of the T-square in the plane thereof.

' 2. A ruler of the kind described, comprising a T-square, including an elongated blade, two spaced sets of ruling bars, the latter being spaced from each other, and a guiding bar spaced from the sets of bars, and supported thereby, the sets and the guiding bar being disposed parallel to each other and to the blade of the T-square.

3. A ruler of the kind described, comprising a T-square, two spaced sets of ruling bars, the latter being evenly spaced from each other, a guiding bar spaced from the sets of bars, said guiding bar and the sets of bars being disposed parallel to each other and to the blade of the T- square, threaded bolt means afiixed to the narrow edge of the T-blade to support one set of said ruling bars, threaded bolts afilxed to the first set of bars to support the following set of bars, and threaded bolts affixed to the second set of bars to support the guiding bar, said bolts being threaded to adjust spacing between the respective sets of bars and the spacing between the bars and the guiding bar.

4. A ruler of the kind described, comprising a T-square including an elongated blade, two spaced sets of ruling bars, the latter being spaced from each other, and a guiding bar spaced from said bars, the sets and the guiding bar being disposed parallel to each other and to the blade of the T-square and being supported by bolts threaded for the purpose of adjusting the spacing between the respective sets of bars and between both sets of bars and the guiding bar.

THOMAS REA.

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