Express Lift DMR Control was an automatic programmed elevator system manufactured by The Express Lift Company under Westinghouse's patent, hence it is based on Westinghouse Selectomatic in the United States. DMR stands for "Drag Magnet Regulator". These elevators use direct current (DC) generators and can go up to 1200 FPM (round up with 6m/s), and use gearless machine - the motor is on one end and the sheave is on the other end. It is introduced in the 1960s and discontinued in 1992.
It is believed that the DMR system was produced in several versions ("marks"), with "Mark IV" or "Mk IV" being the latest known version. The Mark IV is known to use cold cathode tubes, transistors, thyristors, etc. and can be used in a group up to 8 cars.
Notable installations
United Kingdom
Drapers' Gardens, London(1967-2007, demolished)Crown House, Barking(redeveloped)Kodak Tower, Hemel Hemstead(redeveloped in 2008)- Brunel House, Cardiff (modernized by Kone in 2007)
Australia
- Australia Square, Sydney (1967, installed by EPL KONE, modernized by Schindler in 2011)
- Lend Lease House, Sydney
- PIBA House, Sydney
- Oxford Square, Sydney
- Central Square, Sydney
Hong Kong, China
Shun Tak Centre, Central(1984, elevators in main building were replaced by Schindler in 2005)China Merchants Tower, Central(1984, elevators in main building were replaced by Schindler in 2005)
Project from Hong Kong Housing Authority
Hong Kong Island
- Yue On Court, Ap Lei Chau (1988)
- Hiu Tsui Court, Siu Sai Wan, Chai Wan (1990, only high zone is applied)
- Siu Sai Wan Estate, Siu Sai Wan, Chai Wan
- Shui Keung House (1990)
- Shui Fu House (1990)
- Shui Hei House (1990)
- Shui Lok House (1990)
- Wah Kwai Estate, Aberdeen
- Wah Hau House (1990)
- Wah Lim House (1990)
- Wah Lai House (1990)
Kowloon
- Tak Tin Estate, Lam Tin (1989)
- Tak Lung House
- Tak Shing House
- Tsui Yung House, Tsui Ping (North) Estate, Kwun Tong (1986)
- Choi Ha Estate, Kowloon Bay (1989)
- Choi Sing House
- Choi Yat House
- Choi Yuet House
- Lok Tung House, Lok Fu Estate, Lok Fu (1991)
New Territories
- Tai Ping Estate, Sheung Shui (1989)
- Kam Hei Court, Ma On Shan (1990)
- Fu Heng Estate, Tai Po (1990)
- Hang Wing House
- Hang Tsui House
- Hang Yiu House
- Po Nga Court, Tai Po (1991)
- Hing Wo House
- Ka Wo House
- Wah Ming Estate, Tai Po (1990)
- Lai Ming House
- Shun Ming House
- Choi Po Court, Sheung Shui (1985)
- Ching Wah Court, Tsing Yi (1987)
- Wah Fung House
- Wah Bik House
- Wah Cheung House
- Wah Yan House
Other countries
Ocean Centre, Raffles Place, Singapore(1974, demolished and redeveloped to the Ocean Financial Centre in 2011 with Mitsubishi DOAS)
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