US967561A

US967561A - Mechanical lettering device.

Info

Publication number: US967561A
Application number: US54232510A
Authority: US
Inventors: James E Robbins
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-02-05
Filing date: 1910-02-05
Publication date: 1910-08-16
Anticipated expiration: 1927-08-16

Description

J. E. ROBBI'NS. MECHANICAL LBTTEBING DEVICE.

APPLIUATIDN. FILED FEB. 5`, 1910.

Patented Aug-16, 1910.

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.APPLICATION EILIBD PEB. 5, 1810. V

Patented Aug. 16,1910( .2 SHEETS-sum1' z.

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JAMES EL ,ROBBIN OF" NEBRSKA CITY; NEBRASKA;

u MECHANICAL" LETTERING DEVICE.

Sixecaton of Letters Patent.

Patented Aug. 16,19102 Application flied rebruaryaieio. serial no. 542,325.

To @ZZ 'whom it may ,concerns Be it known thatLJAMns E. RoBBINs, a citizen of the United States, residing :at Nebraska City, in the county of Otoe and State of Nebraska, have invented certain new and useful Improvements in Mechanical Lettering Devices, of which the following is a specification. p i

My invention is a mechanical lettering device which may be used in making accurately any size and style of letters.

In the accompanying` drawings: Figure 'l is a face view of myinvention. Figs. 2, 3 and et are diagrams showing how the invention may be used.

My invention is described as follows.

My device consists of a carpenters square, the left hand edge of the beam being divided into inches and parts of inches and numbered; the center of its beam is provided with a vertical row of perfora-tions 9, of an inch apart. Every alternate perforation is numbered, thus, beginning at the upper end of the square, the iirst perforation is opposite the inch mark, the second is opposite the inch mark and is numbered 1, the third perforation is opposite the l; inch mark and is numbered 2, the fifth one is opposite the inch mark and is numbered 3 and so on down to 11, numbering every alternate perforation in consecutive order.

In the upper left hand corner of the square is a slot a, its left hand end being half way distant between the second and third quarter marks of the beam of the square and its right hand end resting on the first inch mark of the blade of the square, and about down from the right hand end of said slot is a small recess Z). This slot stands at an incline of 30 degrees in relation to the lower edge of the blade. Said blade is provided with two slots c and c', the first standing at an incline of 70 and the other 60 degrees in relation to the lower edge of the blade, both leaning to the right. rIhe eX-` treme righthand end of said blade is provided with two slots cl and d respectively; the first standing at an incline of 60 and the other at 70 degrees to the lower edge of the blade, both leaning to the left. Said slots a, c, c', CZ, and cl have drawn longitudinally through their centers and running to the edges of said square, lines 7", r', r2, 9^ and r4, respectively, so thatthe desired angles may be made byplacing a `pencil mark at each end of said lines instead` of using the slots,`

Alittle study would i quickly show` how this device is used.` Place' this. device down on the sheet, on which` the lettering or drawings are to be made, the right angle corner to the leftand draw a vertical line with the left hand edge of the square and a line with the blade or rightangle edge and run a line through the slot a to get an angle line of 30 degrees to the left at the corner,

and by turning: the square over theright angle part lto the right to get la similarl an gle e and so on `at every corner of the large figure marked F ig. 2.

If I desire to make a circle 5 inches in diameter, I place my pivot in the perforation immediately opposite inch l, and my pencil in the perforation immediately opposite 3112; inches and describe a circle with its center at the point indicated at f, Fig. 3, and thus I get a perfect circle 5 inches in diameter indicated at g. If I want to draw the are of a circle 925 inches in diameter, I place my pivot through the perforation immediately opposite inch l and my pencil. through the perforation immediately opposite and draw my ellipse as indicated by the elliptical line marked z' and to draw a similar are opposite the arc just made, I place my pivot at j immediately through the perforation marked l, and my pencil through the perforation at 55j-, and I form the short arcs le and Z in the same way.

It will be seen by using this device that I can, without the aid of dividers, accurately draw any size circle or any arc of a circle. It will be observed that if I place the blade of the square on the base line m and draw a line `through the slot c, I will get a line a at an angle of 70 degrees from said base line, and if I slip the square to the right and perform the same operation I get a similar line of 70 degrees as at o and if I reverse the rule and draw a line through the same slot I get a line p at an angle of 70 degrees from said base line and if I slip the rule to the left I get a similar line g, with the same inclination, and then if I draw a line along the lower edge of the blade, connecting the lower ends of the lines n, 0, g, and 0, I get a letter A; the two horizontal lines connecting the inclined lines o and g may be drawn by using any one of the straight edges of my lettering device.

The same result may be obtained by makingA the proper dots at the ends of the lines r, 1 r2, r3 and r* and drawing the lines as indicated above.

Having described my invention what I claim as new and desire to secure by Letters Patent, is: A

l. A carpenters square having the left hand edge of its beam divided into inches and parts of inches, said inchesl being numbered from top to bottom; a line of perfora- ,tions -in the center of said beam, the upper perforation immediately opposite the threequarter inch mark, the second perforation immediately opposite the inch mark, the perforations continuing` down the center of said beam at intervals of i inch and numbered alternately l, 2, 3, and 4 and so on down to the lower end of said line, said square having in its upper left hand cor-l ner a slot a at an incline of 30 degrees, from the edge of the blade, leaning to the right, the blade of said square having a slot o at an angle of 70 degrees, another slot o at an angle of 60 degrees, both leaning to the right, and near the end of said blade, a slot d of 60 degrees and a slot d of 70 degrees both leaning to the left.

2. A device to aid in sign painting having a straight side or beam and a right angle blade, said beam side and right angle blade being divided into inches and parts of inches, a row of perforations running vertically through beam of said device one-quarter of an inch apart and numbered alternately l, 2, 3, et, etc., a slot a in the upper left hand corner of the device at an angle of degrees in relation to the upper straight edge of the device, leaning to the right, slots in the blade of said device leaning at different angles and in different directions from the base, sub stantially as shown and described.

In testimony whereof I aiiix my signature, in presence of two witnesses.

JAMES E. ROBBINS.

Witnesses F. W. Ko'r'rMANN, HARVEY TETEW.