Abstract: An improved rheometer and rotatable sensing shaft sub-assembly therefor with flexural pivot support at two ends of the shaft, and means for allowing limited axial movement of the shaft while maintaining rigid radial support, with transducer means for extracting and signaling rotational position of the shaft based on shear stress of a fluent material contacting a spindle, cone/plate or other extension of the shaft and/or a related motor-driven member such as a cylinder.

Abstract: A rheometer instrument with radiant heating of sample fluid with use of emissive/absorbing spaced surfaces of a sample container and an interior surface and of a chamber surrounding the sample container in part that is in a heating unit and controls for reliably reaching and maintaining target sample temperatures. The sample fluid can be pressurized.

Abstract: Viscosity or rheology measuring instrument utilizing Hall Effect or like magnetic coupling with parts mounted on driving and driven rotational assemblies.

Abstract: A viscosity measuring instrument for measuring ceramic slurries, e.g. in a casting tank, with a probe having an elbow and presenting a transducer part in substantial alignment with a flow direction of the ceramic slurry relative to the active part and a barrier orthogonal to such relative movement direction is interposed in front of the transducer part by one or more stand-off rods to form a partial enclosure that moderates flow to the active part and provides a long term stable measuring capability.

Abstract: An improved rheometer and rotatable sensing shaft sub-assembly therefor with flexural pivot support at two ends of the shaft, and means for allowing limited axial movement of the shaft while maintaining rigid radial support, with transducer means for extracting and signaling rotational position of the shaft based on shear stress of a fluent material contacting a spindle, cone/plate or other extension of the shaft and/or a related motor-driven member such as a cylinder.

Abstract: Range-extending method and apparatus for testing the viscosity of a fluid (10) undergoing a state change utilizing a viscometer (2) with a rotary assembly (42) for measuring, by automatically changing the rotational speed of the rotary assembly in response to measuring a torque or other test parameter when it meets a target torque trigger and/or other test parameter threshold.

Abstract: Range-extending method and apparatus for testing the viscosity of a fluid (10) undergoing a state change utilizing a viscometer (2) with a rotary assembly (42) for measuring, by automatically changing the rotational speed of the rotary assembly in response to measuring a torque or other test parameter when it meets a target torque trigger and/or other test parameter threshold.

Abstract: The invention comprises measuring or responsive instruments, including (but not limited to) viscometers, having a music wire (20) or like high tensile wire support between driving/driven shaft assemblies (18, 16) and appropriate mounting to eliminate drag, friction, radial misalignment, vibration problems, especially at high rotational speeds, and afford an enhanced accuracy and speed of measurement or other response of the instrument as a whole, including such specific features allowing large angular deflections or small ones (full scale under one degree) and axial and radial rigidity. The instrument can also be used with a plate for cone plate, oscillation and normal force measurements.

Abstract: Pressurized viscometer (10) with fluid holder (12) rotatable by a motor (M) and gearing (50) to shear a tested fluid F thus imparting torque to a spindle assembly 32 mounted via a flexural mount (rods TR) and having a read-out rod or wire (40) with an adjacent transducer (R, S), the wire passing through an elongated holder shaft (18) within a fixed cylinder that mounts an elongated fluid holder extension (16) via an elongated bearing array (20, 24) on the outer surface thereof.

Abstract: A viscometer (10) has a spindle (12) mounted on a rotatable shaft (14) which is, in turn, contained in a tubular rotatable shaft (16) which is within a fixed hollow shaft (18). The latter is suspended from a flange (20) that mates with a flange (22) of an access port (24) of a reactor vessel (RV). There is a base for an external tower (21) that carries a motor (M) and gearing (G) to drive the rotatable shafts (14, 16). A torque interconnection between the rotatable shafts allows angular deflection between them and a transducer (28) picks up such deflection.

Abstract: Viscometer with a spindle (4) mounted on a shaft (8) supported via axially spaced, e.g. three inches, bearings (12,14) and driving a transducer rotary member via a stiff rotationally resilient member, the latter providing substantially all the resistive torque to viscous drag imparted to the spindle by an outer driven rotating member (6) when the spindle and rotating member are immersed in a liquid whose viscosity is to be measured, the viscometer being constructed with a handle (38) that encloses motor drive and electronic components of the viscometer, these features, as a whole, providing explosion protection and portability of the viscometer with sensitivity appropriate to portable usage.

Abstract: Rheometric instrument with a motor (24)-driven chamber (12) and concentric spindle (14) removable for fluid changes and reinsertable between the motor drive and a transducer (30) and sense shaft 26) utilizing a flexual mount (36) and jewel--pin mount (26A) to afford repeatably precise radial and axial positioning and, as re-assembled affording a broad range of low torque to high torque response with high sensitivity and reliability and ease of fluid containment for cleaning and handling purposes.

Abstract: Quieting circuits for synchronous electric motors bypass their phase shifting coils with a minor percentage of the total motor watts input.

Abstract: A threading and/or tapping device has a housing including a tubular portion and a chamber portion that provides a shelf for a motor. A shaft rotatably connected to a slide within the tubular portion extends downwardly through the chamber portion with a tool holder on its exposed end. The slide is movable by the operator to advance and retract the shaft and a gear train within the chamber includes a drive gear on the motor shaft and a driven gear through the axis of which the tool holder shaft extends to rotate therewith and to slide relative thereto as the operator advances or retracts the shaft. The housing includes means for detachably attaching it with the work holder shaft either normal to or axially aligned with a support.