Pneumatic crosscut sampler

A crosscut sampler for particulate material flowing in a duct, comprising

• a housing for connection into the duct and having an inlet and an outlet and a flow passage therebetween for the stream of flowing material
• a sample head in the housing and having a slotted sample receiving side facing upstream and transversing the flow passage for collecting samples of the flowing material,
• movable means in the housing and mounting the sample head for moving the slotted side transversely across the flow passage and the stream of flowing material, and
• a head closing panel in the housing at one side of the flow passage and being swingable into and out of confronting relation to the upstream side of the head.

A crosscut sampler for particulate material flowing in a duct, comprising

• a housing for connection into the duct and having an inlet and an outlet and a flow passage therebetween for the stream of flowing material, the housing having a wall lying along and spaced from the flow passage, the wall having a circular opening therein,
• a sample head in the housing and having a slotted sample receiving upstream side facing the inlet of the housing and traversing the width of the flow passage for collecting samples of flowing material, the sample head being movable transversely of the slot to move across the breadth of the flow passage in order to collect samples of particulate material from all portions of the flow passage,
• a circular rotary mounting disc in the circular wall opening and having an inner face lying substantially flush with the inner surface of the housing wall, means to rotate the disc in the wall,
• a sample spout connected to and mounting said sample head, the sample spout extending through and being rotatable in said mounting disc in spaced relation with the rotation axis of the mounting disc,
• a swinging closure panel in the housing at one side of the flow passage and adjacent the periphery of the disc, the closure panel being swingable on an axis lying parallel to the disc axis and being swingable into and out of obstructing relation with the slotted side of the sample head,
• a drive connection between the disc and the closure panel to coordinate the swinging of the panel with the rotation of the disc and with the sample head, and
• sample head orienting means maintaining the slotted side of the sample head facing upstream and the inlet of the housing.