TWO WAY ELEVATOR COMMUNICATION SYSTEM

Brand	Owner	Address	Description
HELPLINK	THYSSENKRUPP ELEVATOR CAPITAL CORPORATION	3155 W. Big Beaver Rd Troy MI 48084	two way elevator communication system comprised of a telephone which allows elevator users to communicate with a central emergency switchboard;HELP LINK;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

An elevator in which the elevator car is suspended by means of hoisting ropes consisting of a single rope or several parallel ropes, said elevator having a traction sheave which moves the elevator car by means of the hoisting ropes. The elevator has rope portions of the hoisting ropes going upwards and downwards from the elevator car, and the rope portions going upwards from the elevator car are under a first rope tension (T1) which is greater than a second rope tension (T2), which is the rope tension of the rope portions going downwards from the elevator car, and that the elevator comprises a compensating system for keeping the ratio (T1/T2) between the first and the second rope tensions substantially constant.