Robinson is most well known for his invention of the
lead rubber bearing (LRB) seismic isolation device. He designed the LRB in 1974 while working as a scientist for
DSIR (Department of Scientific and Industrial Research, New Zealand). As he was a public service employee when he invented the device, the LRB patent was owned by the state. The LRB is used under more than US$100 billion worth of structures around the world, including New Zealand's
Te Papa Tongarewa (National Museum of New Zealand), the new
Wellington Hospital,
Victoria University Library and
Parliament Buildings. Most significant bridges in NZ use base isolation technology. LRBs are also under the Bhuj Hospital (India) and the C-1 building (Tokyo)—the largest building in the world that is protected by these devices. The Christchurch Women's Hospital is the only building in that city that uses LRBs and it was able to continue operating without any problems throughout the
devastating earthquakes that occurred between September 2010 and June 2011. During the severe
1994 Northridge earthquake in Los Angeles, the LRB-protected
University of Southern California Teaching Hospital remained operational while the ten other hospitals in the area were so badly damaged that they had to be evacuated. The William Clayton building in
Wellington, New Zealand, was the first in the world to be base isolated with LRBs. It was built by the then
Ministry of Works and Development. The Ministry of Post and Telecommunications Computer Centre came through the
1995 Kobe quake unscathed and remained fully operational. This significant building is one that is pointed to as an example of how the lead rubber bearing technology saves a building and its contents. Following the
Kobe quake there was a large uptake of seismic isolation technology and in particular the Lead Rubber Bearing in Japan. The second region in which these devices have been well used is California, following the Los Angeles and Northridge earthquake in 1994. The first use of an LRB in the USA was in 1984. Base isolators have since been inserted under more than 100 bridges and 70 buildings in the USA. Building codes in that country require all new hospitals to implement base isolation technology to ensure that they can continue functioning after a major quake. In more recent years severe earthquakes in India and Turkey have generated interest in seismic isolation technology and many new buildings and bridges are being fitted with seismic isolation. The costs of using base isolation for large structures have been found to be recouped in only a few years as insurance premiums are reduced so dramatically. Robinson also invented the Roball and the Roglider base isolation systems for medium-weight and low rise buildings, ==Life==