Abstract:
Method of precisely positioning a first terminal portion of an elongated tensile rod with respect to a base member coupled to a second terminal portion of the tensile rod which has a threaded portion, involves providing an electrical strain gage measurement device affixed to the tensile rod, a load tube positioned about the rod, having a first terminal portion positioned against the base member, and tightening a nut member over the threaded portion of the rod and against the load tube for producing compression of the tube and tension within the rod until a signal produced by the strain gage measuring device indicates a desired position of a terminal portion of the rod with respect to the base member.
Abstract:
The sensing head of a measuring machine is pendulously suspended via self-centering ball-and-socket structure which affords resilient dislocating relief from its normal precisely centered position of measurement. The resilient connection permits feeedom for such dislocation for all possible directions in spaces, while effectively anchoring the head against torsional deflection about the vertical axis. Once the collision condition is removed, the self-centering suspension assures resumed precision of the at-rest condition in which measurements can be made.
Abstract:
The device comprises a sensor (2) which is connected to a movable housing (1) by an elastically deformable mechanism (4).The sensor and the housing are connected to an electric circuit (5) comprising:a capacitive amplifier producing a measurement pulse constituting a datum for a computer and an order for the stopping of the displacement of the sensor when the latter comes into contact with a part to be measured which is mounted in insulated fashion on a measurement table,a short-circuiting device (17-18) producing a safety pulse which constitute an order for the stopping of this displacement in the event of deformation of the mechanism (4) as a result of the non-issuance of the measurement pulse.A measurement is thus taken with full safety without deformation of the linking mechanism and without the part to be measured having to be connected to the electric circuit.
Abstract:
Adjustment of the force that a stylus exerts on an object in a stylus profiler is accomplished by having a magnetic core, which is operably connected to the stylus and and mounted within an electromagnetic coil. The core moves relative to the coil as the stylus moves vertically. The coil creates a uniform magnetic field within the range of movement of the core. The core is elongated to be subject to uniform fields so that the force that the core-coil combination applies to the stylus is constant irrespective of the vertical position of the stylus.
Abstract:
The object of the invention is to provide a pressure responsive probe and method of use for manually applying a predetermined probing force to an object such as the floor of a periodontal pocket, for example.The probe has a magnetizable member 28, and a movable lever 14 having a probe tip 18 at one end. The lever 14 and member 28 have cooperating surfaces 24, 30 respectively. The member 28 is magnetized for holding lever 14 in a normally "engaged" position in which the surfaces 24, 30 are held engaged with a preset magnetic force. When a predetermined probing force manually applied to the floor of a periodontal pocket through probe tip 18 overcomes the preset magnetic force, the lever 14 is moved to a "disengaged" position in which the surfaces 24, 30 are disengaged. The depth of the pocket can be observed on a scale on the probe tip at the predetermined probing force.
Abstract:
An acoustic micrometer for measuring the exact distance between two electrically interconnected metallic objects is disclosed. The micrometer comprises a micrometer head having an electrical contact at one end adapted to engage one of the metallic objects when taking a measurement, a housing secured to the other end of the micrometer head and adapted to physically engage the other metallic object, a battery located in the housing, electrical contact means connected to one terminal of the battery and mounted at the end of the housing so as to engage the other metallic object when taking a measurement, and a sound generator and speaker assembly adapted for connection of the micrometer head to emit an audible signal when the electrical circuit is completed between the metallic objects.