Abstract: A peristaltic pump includes a first motor shaft, a second motor shaft, a first pump head, a second pump head, and a motor. The first pump head is operably coupled to the first motor shaft such that the first pump head is rotated in response to rotation of the first motor shaft. The second pump head is operably coupled to the second motor shaft such that the second pump head is rotated in response to rotation of the second motor shaft. The motor is configured to rotate the first and second motor shafts. The pump head has a first mode in which the first pump head is rotated and the second pump head is idle and a second mode in which the first pump head is idle and the second pump head is rotated.

Abstract: A peristaltic pump includes a first motor shaft, a second motor shaft, a first pump head, a second pump head, and a motor. The first pump head is operably coupled to the first motor shaft such that the first pump head is rotated in response to rotation of the first motor shaft. The second pump head is operably coupled to the second motor shaft such that the second pump head is rotated in response to rotation of the second motor shaft. The motor is configured to rotate the first and second motor shafts. The pump head has a first mode in which the first pump head is rotated and the second pump head is idle and a second mode in which the first pump head is idle and the second pump head is rotated.

Abstract: A peristaltic pump includes a first motor shaft, a second motor shaft, a first pump head, a second pump head, and a motor. The first pump head is operably coupled to the first motor shaft such that the first pump head is rotated in response to rotation of the first motor shaft. The second pump head is operably coupled to the second motor shaft such that the second pump head is rotated in response to rotation of the second motor shaft. The motor is configured to rotate the first and second motor shafts. The pump head has a first mode in which the first pump head is rotated and the second pump head is idle and a second mode in which the first pump head is idle and the second pump head is rotated.

Abstract: The invention relates to a high-temperature superconductor lead element including a plurality of lengths of high-temperature superconductor electrically connected in a non-collinear configuration, for example, next to and parallel with each other, to increase the thermal length of the lead element. A proximal end of a first of the lengths is configured for thermal connection to a warm thermal element and a distal end of a last of the lengths is configured for thermal connection to a cold thermal element. Each length of high-temperature superconductor includes a high-temperature superconductor plate having an electrically insulative support and a plurality of high-temperature superconductor tapes mounted, in a linear array, on the support. A plurality of high-temperature superconductor plates are arranged with their longitudinal axis parallel to form a cylindrical lead with "bad" self-fields in each plate being substantially cancelled by self-fields in neighboring plates.