A mounting and protective means for use in force measuring or weighing devices comprising a load carrier and a load transmitting means. Its purpose is to facilitate the mounting of the carrier and the transmitting means and to constitute a limiter for lateral displacements in the plane perpendicular to the load action line of the carrier. The mounting and protective means comprises two parts which at measuring are in contact with the transmitting means, one of the parts being also connected to the load carrier and the other part to a foundation for the carrier. The two parts can be brought into at least two positions mutually in the load transmission direction. In one mutual position they are fixed in such position in said plane which the transmitting means is desired to have as initial measuring position. In another, possibly the same, position, this is chosen to enable the transmitting means to be inserted or taken out. Further, the parts may be brought in such mutual position in said direction, that they are freely movable in said plane, as is necessary at load measurement, but the movability is limited by stop devices to suitable predetermined values.
A mounting kit for a weighing cell includes a lower mounting plate, an upper mounting plate, two pressure pieces for receiving a weighing cell and at least one safety element forming an integrated fall-arresting, lifting or limiting safeguard. The safety element (6) has a connecting element and a stop element, and the connecting element and stop element are in positive engagement with one another. The connecting element and the upper pressure piece are connected to the upper mounting plate by adhesive force and the stop element and the lower pressure piece are connected to the lower mounting plate by adhesive force.
This invention relates to the design and construction of an adaptor for load cells with through loading holes (primarily cylindrical or doughnut type) used in multiple cell applications (scales); it provides lateral stops and anti-tipping control for the associated load receptacles; it features options for total overload protection, shock or vibrational force transmissibility reduction and lateral force reduction techniques for cell performance improvement.
A tank weigh module includes a bottom plate that has two lower stop blocks protruding upwardly therefrom, and a top plate that has an upper stop block protruding downwardly therefrom into a space between the two upper stop blocks with a block free play clearance therebetween. A restraining pin is arranged to extend through aligned pin receiving holes in all of the stop blocks. In the lower stop blocks, the holes provide a tight friction fit for the pin, while the hole in the upper stop block has a larger diameter and provides a pin free play clearance. Motion of the top plate relative to the bottom plate in the back-and-forth Y-direction is limited to the extent of the block free play clearance. Travel of the top plate in the side-to-side X-direction and in the uplift Z-direction is restrained by the extent of the pin free play clearance. Tilting and twisting about the X-, Y-, and Z-axes are also limited by the pin interacting with the blocks and the blocks interacting with each other. A load cell is secured in position between the top and bottom plates by two fixed securing pins and a third removable securing pin attached to the bottom plate, whereby the securing pins are angularly offset by 120.degree. from each other. The weigh module has a simple construction, installation, and servicing, and provides protection against excess uplift, side loading, and tilting while allow complete free floating operation in a normal operating range.
An improved scale includes a movable platform which is supported by a plurality of force transmitting assemblies. Upon sideways movement of the platform, the force transmitting assemblies and platform interact to align the force transmitting assemblies and to center the platform. In one embodiment of the invention, each force transmitting assembly includes a slider which is movable along a base surface. A rocker pin transmits force between the slider and a load cell beam which is connected with the platform. When the platform is moved sideways relative to the base, the rocker pin is tilted to a maximum offset condition in which horizontally offset vertical force components are applied to the rocker pin. Continued sideways movement of the platform relative to the base results in movement of the slider relative to the base. When movement of the platform is interrupted by engagement with a bumper, the horizontally offset vertical force components applied to the rocker pin cause it to tilt to an aligned condition in which only vertically aligned force components are applied to the rocker pin. In another embodiment of the invention, the slider and a spherical force transmitting member are connected with the base and the platform moves sideways relative to the slider when the force transmitting assembly is in a maximum offset condition.
A thermogravimetric instrument for measuring variations in the weight of a sample caused by temperature variations of the sample. The instrument is equipped with a stopper mechanism for protecting the pivot to facilitate replacing a balance beam. A thermogravimetric instrument comprising: a balance beam 1 placed horizontally; a sample holder 9 located at one end of said balance beam; a torsion wire 3 mounted as a pivot and connected with the other end; a junction portion permitting a sample container side of the balance beam to be detached; and one or more stopper mechanisms using fixed stoppers 4 and metal plates 5. The stopper mechanisms limit relative movement between a supported portion of the torsion wire and the balance beam to within a prescribed amount to limit force applied to the torsion wire during detachment of the balance beam.
