<P> In the mid-twentieth century, some handrail designs consisted of a rubber bellows, with rings of smooth metal cladding called "bracelets" between each coil . This gave the handrail a rigid yet flexible feel . Additionally, each bellows section was no more than a few feet long, so if part of the handrail was damaged, only the bad segment needed to be replaced . These forms of handrail have largely been replaced with fabric - and - rubber railings . </P> <Table> <Tr> <Th> Escalator components </Th> </Tr> <Tr> <Td> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> An escalator being repaired at Town Hall station in Sydney, Australia </Td> </Tr> </Table> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> A "freestanding" escalator reveals its inner components through the transparent truss . </Td> </Tr> </Table> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> Escalator truss connects to the landing platform (lower left). Also visible: exposed drive gears (center) for steps and handrail drive (left) </Td> </Tr> </Table> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> View of escalator steps on continuous chain </Td> </Tr> </Table> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> An escalator equipped with a "bellows" handrail . The bracelets are colored grey, with occasional strings of black ones to appear as moving spacers. etc </Td> </Tr> </Table> </Td> </Tr> </Table> <Tr> <Th> Escalator components </Th> </Tr> <Tr> <Td> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> An escalator being repaired at Town Hall station in Sydney, Australia </Td> </Tr> </Table> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> A "freestanding" escalator reveals its inner components through the transparent truss . </Td> </Tr> </Table> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> Escalator truss connects to the landing platform (lower left). Also visible: exposed drive gears (center) for steps and handrail drive (left) </Td> </Tr> </Table> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> View of escalator steps on continuous chain </Td> </Tr> </Table> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> An escalator equipped with a "bellows" handrail . The bracelets are colored grey, with occasional strings of black ones to appear as moving spacers. etc </Td> </Tr> </Table> </Td> </Tr>

When was the first escalator installed in zambia