Abstract: A nuclear magnetic resonance probe head comprising at least two orthogonal coil/resonator configurations A1 and A2 having different resonance frequencies, wherein at feast one of the coil/resonator configurations A1 has two saddle-shaped coils S1 and S2, wherein each coil has a window about which N windings are disposed which are connected in series, wherein N?2. Each coil S1 and S2 is formed mirror-symmetrically relative to a central plane of the respective coil, which is perpendicular to the window of the respective coil, wherein the central planes of the coils S1 and S2 are identical to minimize the electromagnetic coupling between the two coil/resonator configurations A1 and A2 at the resonance frequency of A2. The NMR probe head reduces coupling between the two coil/resonator configurations.

Abstract: A nuclear magnetic resonance probe head comprising at least two coil/resonator configurations A1 and A2, wherein at least one of the coil/resonator configurations A1 has two saddle-shaped coils S1 and S2 (1, 2; 21; 41, 42; 53), wherein each coil (1, 2; 21; 41, 42; 53) has a window (9) about which N windings (3, 4; 26, 28, 30) are disposed which are connected in series, wherein N?2, wherein the coil/resonator configurations A1 and A2 are aligned perpendicularly to each other, and wherein the coil/resonator configurations A1 and A2 have different resonance frequencies is characterized in that each coil S1 and S2 (1, 2; 21; 41, 42; 53) is formed mirror-symmetrically relative to a central plane (5) of the respective coil (1, 2; 21; 41, 42; 53), which is perpendicular to the window (9) of the respective coil, and wherein the central planes (5) of the coils S1 and S2 are identical to minimize the electromagnetic coupling between the two coil/resonator configurations A1 and A2 at the resonance frequency of A2.

Abstract: Universal keyboard with individually removable switch modules each adapted particularly for use with a printed circuit switch, although also adapted to close or actuate other types of switch contacts, which has maximum reliability at minimum cost, satisfies the "best feel" tactile responses desired in a keyboard, while fully protecting the module components and the electrical conducting members against any excessive finger depression impact forces, assures uniformity of forces being applied to switch contacts regardless of variations in forces which may be applied to the key buttons or stems, reduces electric contact bounce, and maximizes the time the switch contacts are held closed during a key stroke.