Abstract: A support device for a weighing cell is mounted on one or more support posts resting on support springs that are connected to a stationary chassis and are pre-tensioned with an upward force. In case of a downward-directed shock, the support springs will yield to the inertial shock force and allow the weighing cell to move downward. The support posts can lift off from their resting places on the support springs, but are constrained by guide members to a limited range of upward vertical movement. A balance equipped with the support device has a low profile height and protects the weighing cell from downward- as well as upward-directed shocks.

Abstract: An apparatus for the gravimetric calibration of multi-channel pipettes contains a balance (37) that has a load receiver (38) configured to support receptacles (13) containing a substance to be weighed. The apparatus has a holder device (10) to support a certain number of the receptacles (13) into which a test liquid is dispensed from the multi-channel pipette. The apparatus further has a transport device (1) for advancing the holder device (10) towards the load receiver (38). The receptacles (13) are seated in the holder device (10) at equally spaced positions and are one by one delivered to and subsequently removed from the measuring device.

Abstract: A balance (1) has a weighing compartment (4) that borders on a stationary part (8, 9) of the balance and is otherwise enclosed by at least one side wall panel (5, 6), a front wall panel (7), and a top cover panel (12). At least one of the side wall and top cover panels is slidable by means of a guiding device (17, 120) to open and close the weighing compartment (4). A holder arrangement (15, 17c, 58, 125) for the at least one slidable panel (5, 6, 12) is integrated in the guiding device (17, 120), and a holder arrangement for a non-slidable panel is integrated in the stationary part (8). The holder arrangements (15, 19, 17c, 58, 125) releasably connect the panels (5, 6, 7, 12) to the balance by means of form-locking closure devices, so that each panel (5, 6, 7, 12) can be attached to the balance as well as released for removal from the balance by applying a force to the panel (5, 6, 7, 12) and/or the holder arrangement (15, 19, 17c, 58, 125).

Abstract: A balance (1) has a weighing compartment (3) and a balance housing (4), which contains a weighing cell (15) and forms a rear wall (13) and a floor (8) for the weighing compartment (3). A weighing-load carrier (2) is arranged on a cantilever arm (30) of the weighing cell (15). The rear wall (13) of the weighing compartment is equipped with a stationary holder system (21) that allows a variety of weighing-compartment accessories to be releasably installed at different levels above the floor (8) of the weighing compartment.

Abstract: A balance (1) has a weighing compartment (3) and a balance housing (4). The balance housing (4) contains a weighing cell (15) and forms a rear wall (13) and a floor (8) for the weighing compartment (3). A weighing-load carrier (2) is arranged on a cantilever arm (30) of the weighing cell (15). The cantilever arm (30) also holds a weight-receiving element (6) for calibration weights (7) of a calibration device (5). The weighing-load carrier (2) is releasably attached to a coupling arrangement (11) protruding from the cantilever arm (30) through passage openings (12) in the rear wall (13). The floor (8) extends without openings between the weight-receiving element (6) for the calibration weights (7) and the weighing-load carrier (2).

Abstract: A dispensing apparatus for granular or powdery bulk materials includes a balance (15) to weigh the doses of material being dispensed, a reservoir container (1), and a cover (2) to close the downward-facing opening of the storage container (1). Integrated in the cover (2) is a conveying and delivering device with a vertically movable, rotary conveyor body (5) designed so that it can substantially close off the dispensing outlet (14) for the bulk material. The conveyor body has a ring-shaped bottom (6) sweeping a ring-shaped conveyor channel (7) that is recessed in the cover (2). The outlet (14) is arranged in the ring-shaped channel (7) and is designed to deliver a directed and locally concentrated stream of bulk material.

Abstract: A dispensing apparatus for granular or powdery bulk materials includes a balance (15) to weigh the doses of material being dispensed, a reservoir container (1), and a cover (2) to close the downward-facing opening of the storage container (1). Integrated in the cover (2) is a conveying and delivering device with a vertically movable, rotary conveyor body (5) designed so that it can substantially close off the dispensing outlet (14) for the bulk material. The conveyor body has a ring-shaped bottom (6) sweeping a ring-shaped conveyor channel (7) that is recessed in the cover (2). The outlet (14) is arranged in the ring-shaped channel (7) and is designed to deliver a directed and locally concentrated stream of bulk material.

Abstract: A support device for a weighing cell is mounted on one or more support posts resting on support springs that are connected to a stationary chassis and are pretensioned with an upward force. In case of a downward-directed shock, the support springs will yield to the inertial shock force and allow the weighing cell to move downward. The support posts can lift off from their resting places on the support springs, but are constrained by guide members to a limited range of upward vertical movement. A balance equipped with the support device has a low profile height and protects the weighing cell from downward- as well as upward-directed shocks.

Abstract: A precision balance of the type having a short-stroke measuring system includes a load receptor connected to the measuring system by means of a hanger. The load receptor has the shape of a yoke and extends around the hanger. The yoke-shaped load receptor rests on the ends of two arms of a receiving element, wherein the arms are attached to the bottom of the hanger and elastically prestressed to press against the hanger. The yoke-shaped load receptor is held at the upper part of the hanger in a manner allowing guided sideways movement of the load receptor.

Abstract: A vessel holding device is composed of a sheet metal strip which is bent to form a polygon. The resulting side wall members are provided with bores or recesses for holding the vessels, such as, test tubes or syringe cylinders in a predetermined manner. The vessel holding device can be used standing on one of the side wall members or on the upper or lower edges of the device.

Abstract: The moving housing parts of an analytical balance are couplable with drive apparatus, which receives the appropriate control commands for opening or closing, for instance, from sensors operating in a contactless fashion. Proximity sensors or voice control sensors can be utilized as sensors. The mechanical process of the opening-or closing movement occurs by means of a drive housed in the housing.

Abstract: An apparatus for depositing of reference weights in an electronic scale consisting of two levers swivelable around vertical axes, one end of each lever is always in contact with a cam disc attached on a vertically disposed shaft and the other end of which is developed as a gliding shoe which may be pushed below the lifting tray. By rotating the cam shaft, the lifting trays cause the reference weights to be deposited by the cam discs at first each individually one after the other and then jointly onto the carriers.

Abstract: A precision balance in which the fastening surface (56) for an upper guide arm (22) is fastened to a housing (42) which, by means of a pair of parallel levers (48,50) is vertically movable along the side wall (24) of the balance (18). The movement is effected by means of an adjusting element which engages in a conical slot (60) defined between the upper movable portion of the housing (42) and a bearing face (64) which is arranged immovable relative to the balance (18).

Abstract: A precision balance including sliding side doors and an upper cover forming the weighing chamber of the balance. The side doors and the cover can be moved individually or coupled together either manually or driven by a motor. Side parts of the support member form the connection between the side doors and the upper cover. In addition, the side doors are connected to each other by means of a plate extending underneath the weighing chamber and the balance housing. The connection between the movable parts is effected by means of sliding bolts provided in handles. The individual sliding bolts facilitate a coupling between the sliding side doors and/or the cover. The plate extending under the weighing chamber facilitates a connection of the two side doors so that the latter can be moved simultaneously either with or without the upper cover.

Abstract: Electromagnetic load compensation weighing apparatus including a temperature correction circuit having a temperature-responsive element mounted in heat sensing relation relative to the permanent magnet, characterized by the further mounting of a component of the compensating current supply circuit in heat-responsive relation relative to the permanent magnet. A Zener diode serving as a reference voltage device in the compensating current supply circuit is preferably the component that is mounted, together with the temperature-responsive element, in heat conducting relation in a common bore contained within the permanent magnet.

Abstract: A weighing apparatus is disclosed of the type including a horizontal scale pan carrier connected at one end with a vertical load receiving member that is guided for vertical movement relative to the housing, characterized by the provision of a calibration weight removably mounted on the other end of the pan carrier beneath the scale pan, and a device for raising the calibration weight to an inoperable position relative to the pan carrier arm. In the preferred embodiment, the calibration weight comprises a horizontally arranged U-shaped member the center of gravity of which is arranged below the scale pan. In this manner, a compact and simple arrangement of the calibration weight is provided that furthermore facilitates ease of handling and operation.

Abstract: This invention relates to weighing apparatus of the electromagnetic load compensation type including a load or compensation coil connected with the load receiving member, and a reference coil connected with the frame for movement independent of the load receiving member, characterized in that the load and reference coils are arranged within separate air gaps of the magnetic field produced by a permanent magnet system mounted on the weighing apparatus frame. In one embodiment, the permanent magnet system includes a permanent magnet having a rotationally symmetrical field, and a magnetic yoke arrangement including an annular outer pole shoe arranged in concentrically spaced relation about an inner pole shoe. An annular ferromagnetic member is arranged in concentrically spaced relation between the inner and outer pole shoes for defining the air gaps in which the reference and load coils are arranged, respectively.

Abstract: The pan assembly of a top-loading balance consists of a base attached to a pan carrier for joint movement in a vertically extending direction relative to a support on which the carrier is mounted. A sensible signal is generated in response to the presence of an object to be weighed on the pan assembly which, according to the invention, includes a cover spacedly superposed on the base and having a horizontally extending, exposed top face for receiving the object. One or more compensating weights are releasably interposed between the cover and base in weight transmitting relationship, the cover, the weights, and the base being closely similar in configuration when viewed from above and releasably secured to each other by interengaged projections and recesses.

Abstract: The magnet system of a top-loading precision balance with electromagnetic load compensation is fixedly fastened in an aluminum alloy frame constituting the fixed link in the parallelogram suspension for the weighing pan. Distortion of the frame under thermal stresses due to the different coefficients of expansion of the ferrous metal of the magnet system and the light metal of the frame is prevented by openings in the frame walls spacedly surrounding the portions of the frame wall fixedly fastened to the magnet system.

Abstract: Undesired temperature variations in scales having a force-compensating coil carrying a load dependent current are reduced by an additional heat generator mounted near the coil. The heat generated by the latter is controlled to compensate for changes in heating power dissipated by the force-compensating coil.