Add-on device for a musical instrument, particularly a high-hat machine

An add-on device for a pedal-operated musical instrument, particularly a Hi-Hat machine having a main pedal operable between a normal position and another position lower than said normal position for corresponding displacement of an elongated pulling rod along a longitudinal direction thereof, said main pedal being normally returnable from said lower position to said normal position, comprising in combination

• an elongated stationary member,
• a member movable with respect to said stationary elongated member and including means adapted to operatively abut said main pedal to move said main pedal between said normal position and said lower position,
• releasably blocking means actuatable so as to block relative movement between said members, thereby inhibiting a return movement of said main pedal from said lower position to said normal position, said releasable blocking means including an apertured plate pivotally mounted on said elongated stationary member so that said movable member passes through said apertured plate with small play, said apertured plate having an actuable portion and being movable between blocking and nonblocking positions, and
• a spring for releasably holding said apertured plate in said blocking position,
• so that by actuation of said abutting means with one foot a stepless blocking of the relative movement between said members is performed, then by pressing said actuable portion of said apertured plate with the same foot said blocking is automatically removed, and then by releasing said actuable portion said blocking is automatically performed in a new position.