  The distribution of the transport current in branches of a doubly connected
superconductor (DCS) with two clamping point contacts is investigated
experimentally when the contacts are in the different states: (a) one or both
contacts are in the critical state, (b) both are in the supercritical
(resistive) state. In the state (a) the transport current frozen in the DCS and
injected through one of the contacts can be increased or decreased by tuning
the value and polarity of the current passing through the other contact. In the
state (b), the current self-oscillations the amplitude and the frequency of
which depend on the value of the injected transport current appear in the
branches of the DCS. A role of the parametric Josephson inductance and
resistivity of the contact in formation of its critical state and in
distribution of the current in the branches of the DCS is discussed.
