Patent 485,594 issued November 1, 1892) "Pittsburgh and Nearby Districts," Iron Age 98 (August 24, 1916): 430. Patent 460,283 issued September 29, 1891), and "Burner for Burning Gaseous Fuel" (U.S. Patent 205,820 issued July 9, 1878), "Improvement in Rulers" (U.S. References: Henry Adler, "Improvement in Sheet Metal Fenders" (U.S. Adler Company of Pittsburgh and then Carnegie, Pa., was for a time a successful manufacturer of gas stoves under the trade name Acme. Later Henry Adler patents also have the same attorney. The same witnesses and attorney are listed on the patent for this rule and on one for sheet-metal fenders taken out by Henry Adler in 1878. Henry Adler of Pittsburgh took out patents for a wide range of inventions, including metal moldings and ceilings (1872, 1875, 1877, 1878, and 1891) gas burners, stoves and ovens (1891, 1892, 1898, 1899, 1900, and 1902) and a stepladder (1907). Census lists a Henry Adler who was born in Germany in 1833 or 1834, lived in Pittsburgh, and ran a fender factory. The only Henry Adler listed in the Pittsburgh city directory for 1877–1878 was a maker of galvanized iron cornices. According to the patent, Henry Adler lived in Pittsburgh, Pa. Both tags appear to have fire and water damage. A second paper tag is marked: 78 Henry Adler (/) Ruler & Paper Tearer (/) Received Jany 22 (/) 1/29/78. Adler (/) Rulers (/) Patented July 30 th (/) 1878. A patent tag tied to the instrument with red ribbon is marked: 2–232 (/) No. A T-square attachment that is supposed to fasten to the pencil sharpener is not present. One face of the triangular tube has a roughly engraved ruler for inches, divided to 1/4" and numbered by ones from 12 to 1. A piece of metal below the stopper is used for tearing paper. However, at present the stopper cannot be removed from the instrument. The stopper is supposed to have an eraser at one end, a sharpener for slate pencils at the other end, and be removable so that pens and pencils may be stored within the tube. The model he submitted with his patent application is a hollow sheet metal triangular tube, with a cone for sharpening a pencil at one end and a wooden stopper at the other. Patent 206,410 for a combination rule, paper tearer, pencil sharpener, and T-square on July 30, 1878. Patent Model for Rule Invented by Henry Adler Description Henry Adler received U.S. Location Currently not on view date made 1870 maker Ockerlund, Nels ID Number MA.309330 catalog number 309330 accession number 89797 Data Source National Museum of American History Patent 102,034 issued April 19, 1870), and "Improvement in Adding Machine" (U.S. References: Nels Ockerlund, "Improvement in Rule and Calculator" (U.S. He became a citizen in 1879 and is listed in the 1900 census as still living in New York City. In addition to the improved rule and calculator represented by this patent model, he took out a second patent in 1870 for an improvement in adding-machines. He immigrated to the United States in 1865 and settled in New York City. Nels Ockerlund (1837–1903) was born in Sweden. The object is marked: Nels Ockerlund New York. The grooved arm serves as the base and a rule sliding in the groove measures the height of the triangle, from which one can calculate its area. Using this rule and the two arms of the instrument as sides, one can represent a triangle. A third rule slides and pivots in a hollow in the other arm. To add numbers, one removes the longer rule from the groove, and places it alongside the scale on the arm. These rules are supposed to attach to slides that move in a groove in one of the arms, allowing the solution of problems of proportion. The other rule has a 4-1/2" scale and a scale of 30 parts per inch. One rule unfolds to reveal a 10" scale and a scale of 30 parts per inch. Along the inner edges of both arms are scales of equal parts, with 30 parts to the inch. A scale of inches, divided to 1/16" and numbered by ones from 1 to 12 twice, runs along the outer edges of the arms. It is in the general shape of a four-fold rule, with a wooden core covered on both sides with German silver. Patent Model for Combination Rule, Protractor, and Calculating Device by Nels Ockerlund Description This combination instrument may be used to measure distances of up to 24 inches, to measure angles, to solve problems relating to ratios, to assist in finding the area of triangles when the lengths of three sides are known, and to add three-digit numbers.