Connection arrangement in a telephone instrument for connecting an additional speech device

Apparatus for connecting an additional voice circuit to the voice circuits of a telephone instrument having a low speaker device, said apparatus comprising hook switch means movable between an on-hook state and an off-hook state;

• a cam shaft relay means movable by said hook switch means between a first position wherein the voice circuits of the telephone instrument are in a rest state of the telephone instrument when the hook switch means is in the on-hook state and a second position wherein the voice circuits of the telephone instrument are connected to the low speaker device when the hook switch means is in the off-hook state, said cam shaft relay means being further movable to a third position wherein the voice circuits of the telephone instrument are connected to said additional voice circuit;
• a control push button means movable between a rest position and an activated position;
• and a tipping means pivotably mounted between said control push button means and said cam shaft relay means for moving said cam shaft relay means to said third position when said control push button means is moved to the activated position to connect the additional voice circuit to the voice circuits of the telephone instrument independently of the position of the hook switch means.