Cable tension regulators

A cable tension regulator comprising a pivotable hub, an operating lever rigid with said hub, two quadrants each having a periphery, resilient means, locking means, two disengageable oneway couplings, and disengagement means, said two quadrants being pivotably mounted on said hub with said periphery of each said quadrant being fixed to a cable for connection to a control element or an element to be controlled, said resilient means causing said quadrants to pivot in the direction corresponding to tensioning of said cables, said locking means locking said quadrants on said hub when an additional traction is exerted on one of said cables by way of said control element and releasing said quadrants when the tensions on said two cables decrease or increase simultaneously, each of said quadrants being pivotably mounted on said hub by means of a respective one of said disengageable one-way couplings which prevents, when in operation, said quadrant from pivoting under the effect of said resilient means, said disengagement means disengaging said one-way coupling when the respective cable is taut and each of said one-way couplings comprises a substantially radial disengagement rod which is slidably mounted with respect to said respective quadrant, said rod having an end which can project into a groove defined by said periphery of said quadrant, said coupling being in an active position when said end of said rod projects into said groove and in an inactive position when retracted into said quadrant, there being provided resilient means urging said rod so that said end thereof tends to project into said groove.