Total Mixer Technologies LLC history

By 1914, vacuum tubes became economical and more radio stations were on the air.

Frequency hopping spread spectrum was a public domain idea by 1917.

All of mixer technology in use today was mathematically known several hundred years ago and reduced to practice by 1935 when the DPDT vibrator modulator was used in low frequency amplifiers.

The deflection plates and two collecting plates were used in a tube type prior to 1940 in an attempt to increase the frequency response, but the manufacturing process of conventional tubes improved enough for them to have the same performance at a lower cost.

By 1949 this function was performed by the 7360 vacuum tube in radio circuits and six vacuum tubes in rocket telemetry circuits.

The Baker Clamp was common knowledge as early as 1953 and was described in passing in an introductory text on transistors written by Shea.

A Milwaukee, Wisconsin company, T.L. Smith introduced the pan mixer concept to North America in 1955.

In 1963 Jones of Burroughs Corp. patented a common mode feedback addition to the transistor version of the circuit to mitigate the poor performance.

Sylvania marketed this circuit in integrated form in 1964 as an ECL exclusive or gate.

In the text "Precision Electronics" (Philips, 1967), the circuit appears in both vacuum tube and transistor versions.

In 1968, Barrie Gilbert published a paper on a four quadrant analog multiplier which combined the circuit of the Jones patent along with predistortion circuitry to make a large signal four quadrant multiplier.

Founded in 1969 by Hugh and Eileen Tobler, Cemen Tech began as a marketing company with the goal of selling Concrete Mobile by the Irl Daffin Company.

The company moved from Minneapolis, Minnesota to its current location, Indianola, Iowa, in 1975 after expanding to a manufacturing focus.

The rebuild program completed 30 units during 1976, the first year of the program, laying the groundwork for Cemen Tech’s next decade.

Founded in 1979, Mixer Systems, Inc. is dedicated to the design and manufacture of technology for concrete products in the industrial and environmental markets.

The first was delivered to a customer in Tulsa, Oklahoma in 1980.

In 1984, Mixer Systems also purchased the Praschak product line of spiral blade mixers.

1986-today (86,000-Square-Foot executive offices & manufacturing facility, located in suburban Milwaukee, WI)

In 2006, Mixer Systems introduced the first Planetary Mixer to be designed and manufactured in the United States.

The new decade brought a restructured company and new technology, namely the debut of the first fully automated mobile mixer, the C Series, in 2015.