Denver Instrument 5 Orville Dr. Bohemia, NY 11716 800.321.1135 303.431.7255 303.423.4831 FAX Founded at the height of the legendary Colorado goldrush of 1880, Denver Instrument is one of the world's oldest manufacturers of analytical balances. In the late 1880's, the only analytical balances available in America were manufactured and serviced in Europe. English immigrant, William Ainsworth, recognized the opportunity for a U.S. Manufacturer and entered the market with innovative analytical balance designs.

Around 1895, Ainsworth introduced the company's first short-beam analytical which significantly reduced weighing time and improved reliability. The short-beam design was also one of the first commercial uses for aluminum. Today, the Ainsworth tradition of quality and innovation continues at Denver Instrument Company. The company's vertical orientation to manufacturing ensures total quality control of its finished products as all aspects of design and manufacture are performed in the company's modern production facilities in Arvada, Colorado. Denver Instrument's continued investment in state-of-the-art manufacturing technologies and machine tools gives the company's products a distinct advantage in the world market, without sacrificing the quality of the analytical instrument.

Student Analytical Balance Serial No. 32372 Humboldt State College; 1956 1 Usage/History The analytical balance is the most fundamental tool in the chemists arsenal. It is used to determine the masses of, or in other words the amount of stuff in, objects or samples. The balance is a comparison instrument. Humax Usb Dvb-t Driver Win7- Download Last Version there. It compares standard or known weights placed on the left-hand pan to unknown samples or objects placed on the right-hand pan. Merak Mail 10 Keygen there.

The current instrument also has a rider (a 10 mg bent wire weight which is moved along the graduated scale on the top of the beam) to measure small (1-10 mg) differences in mass. The glass case is to protect the balance from drafts while samples are being weighed, as well to keep the delicate mechanisms free from dirt. This particular model is in Ainsworth’s lower quality line, intended for student work in beginning analytical chemistry, for routine work and as a secondary balance in industrial work. The scanned catalog description is from the Braun-Knecht-Heiman-Co. (Division of Van Waters & Rogers, Inc.) Catalog No 63, Laboratory Instruments Apparatus and Supplies, San Francisco (1961). This balance, and a second described below, was originally in the Physics department inventory, apparently acquired in 1956.

Ainsworth & Brunton Balances - Denver, CO. The firm of William Ainsworth Balance Company started in 1880 even though he continued with his watch repair and time. Ainsworth Assay Balance Marking AINSWORTH ASSAY BALANCE - Wm. Ainsworth assay button balance, serial #643, made about 1892, case is French polished mahogany from. Ainsworth & Sons, Inc. AND USE OF THE ANALYTICAL BALANCE AND THE MICRO BALANCE. The scans below were made from a 1943 instruction manual owned by D.

In their 1987 inventory it is listed as Physics property in a Chemistry lab. Apparently the balance was 'loaned' to Chemistry prior to 1987. It was used in the old qualitative analysis (Chemistry 1-C) balance room in Science B prior to moving to the 'new' chemistry labs on the fifth floor of the west wing of Science A c. The balance was then moved to the balance room of Science A 571 for use as a demonstration two-pan balance in general chemistry (Chemistry 109). Early descriptions of the balance and its use are provided below: • Krayer.. (1913) • Smith.

Max Payne 3 Working Trainer Download. ' in.QUANTITATIVE CHEMICAL ANALYSIS. (1921) Description Ainsworth type LC analytical balance. This is a rider balance with a capacity of 200 gm on each pan and a sensitivity of 0.1 mg at full load. Weights up to 10 mg are added with the rider. The beam is 6” long of aluminum and is graduated from 10-0-10 mg by 0.1 mg (see of the balance with serial number 34446, below).

The balance case is aluminum, 18”x 18”x 9”, with a hammertone tan finish, and a single counterpoised door. The base is black slate. The hardware is lacquered brass, including four leveling screws. Additional description is found in the. All exterior brass fittings are lightlycorroded.

Interior brass is in very fine, fully functional condition. There is a small black and nickel tag affixed to the front of the balance case: SCIENTIFIC SUPPLIES CO. / SEATTLE, WASH. There is a decal property tag: STATE OF CALIFORNIA / HUMBOLDT COLLEGE / 14979. A second, later balance (serial number 34446, see ) is currently used for demonstration purposes in general chemistry labs. This balance is identical except that the rider moving mechanism is steel (stainless?) rather than laquered brass,.

There is a decal property tag: STATE OF CALIFORNIA / HUMBOLDT COLLEGE / 15140. When surplused by Physics this balance had been modified to act as an electrostatic balance with one pan replaced by a thin aluminum disk attached to a glass rod and thin wire replacing the sample pan. A non-magnetic stainless steel framework was also present. The balance was returned to its original state when it was transferred to Chemistry for its current use as a demonstration balance.