Rotating hinge and sneeze guard

A method of stably holding and moving a substantially planar object in each of a plurality of different specific rotational positions about an axis, comprising

• a) joining said planar object to a distal portion of a rotatable arm component of an adjustable hinge assembly, said adjustable hinge assembly comprising:
• i. a first retaining plate component having an outer surface and an inner surface, said first retaining plate comprising an axial cavity and a plurality of ball pins protruding from the inner surface thereof;
• ii. said rotatable arm component, comprising a proximal portion and said distal portion extending away from the proximal portion, wherein said proximal portion comprises an axial hole and a plurality of detent holes formed at least partially around the axial hole;
• iii. a second retaining plate component having an outer surface and an inner surface, said inner surface comprising an axial cavity and a raised shoulder component circumferentially positioned around said axial cavity and structured to fit within the axial hole of the rotatable arm component;
• and
• iv. a joining component affixed to the axial cavities of the first retaining plate component and the second retaining plate component, and extending through the axial hole of the rotatable arm component so as to retain the rotatable arm sandwiched between the first retaining plate component and the second retaining plate component and to retain the axial hole of the rotatable arm component positioned on the raised shoulder component of the second retaining plate component,
• wherein the ball pins of the first retaining plate and the detent holes of the rotating arm are structured and arranged to alternately engage and disengage as the rotatable arm is rotated about an axis defined by the raised shoulder component, the rotatable arm being movably held in place by the ball pins relative to the first retaining plate when the ball pins engage with the detent holes;
• and
• b) directly or indirectly rotating the substantially planar object joined to the rotatable arm about the axis to a first specific rotational position in which the ball pins of the first retaining plate and the detent holes of the rotating arm engage, thereby stably holding said object in said first specific rotational position, and
• c) directly or indirectly rotating the substantially planar object joined to the rotatable arm about the axis to a second specific rotational position, different from said first rotational position, in which the ball pins of the first retaining plate and the detent holes of the rotating arm engage, thereby stably holding said planar object in said second specific rotational position.