Abstract: A weighing device (10) has a base body (11), a weighing chamber floor (15), a weighing chamber rear wall (25), and a draft shield (20). The draft shield has a top wall (23), a first side wall (22L), a second side wall (22R), and a front wall (24). The weighing chamber floor, the weighing chamber rear wall, and the draft shield act together to enclose a weighing chamber (W). The weighing chamber rear wall has a first side (35) facing the draft shield and a second side (36), opposite the first side. A mounting unit (30) is movably connected to the first side of the weighing chamber rear wall and a position control unit (50) is operatively connected thereto, on the second side of the weighing chamber rear wall. An elongate slot (40) that passes through the rear wall receives the mounting unit about the first side and guides the mounting unit in a direction normal to the base body.

Abstract: Provided is a protective cover for a weighing instrument in which movement of a sliding door does not degrade over time. A protective cover (2) for a weighing instrument includes sliding doors (2L, 2R) defining a weighing chamber (5), an upper frame (11) formed at an upper edge of the sliding door, a lower frame (12) formed at a lower edge of the sliding door, an upper guide rail (17) disposed on the upper frame, and a lower guide rail (18) disposed under the lower frame, where the upper guide rail suspends the upper frame, and between the upper guide rail and the upper frame, balls (215) are disposed at a plurality of positions in a moving direction of the sliding door.

Abstract: A weighing apparatus includes —a sample holder (20), —a protective housing (14, 16, 18) with an access port (181) and a closure element (26), —a reflection sensor (34) with a radiation emitter (37) emitting sensor radiation (38) reflected by a reflecting object (39) and with a radiation receiver (42) receiving a sensor radiation component (40), reflected by the object and —a control unit (32), connected to a motorized drive (30) of the closure element and to the reflection sensor, and which controls the motorized drive with a reflection sensor signal, for transferring the closure element between closed and open positions. A differentiating element subjects a sensor primary signal (52) of the reflection sensor to a differentiation. The primary signal depends on a reflection intensity of the reflected radiation component and generates a sensor secondary signal (60). The control unit controls the motorized drive based on the sign of the secondary signal.

Abstract: A weighing chamber base (34) for a precision balance (10) has a weighing base section (98) and two side cheeks (100), which extend perpendicularly from the weighing base section, and which are arranged on opposite edges (102) of the weighing base section outside the draft shield (12). Also, a draft shield (12) that has such a weighing chamber base (34), and has at least one side panel (26), which can be moved between an open position and a closed position. The side cheeks of the weighing chamber base form a section of the side walls (22) of the draft shield (12).

Abstract: A precision balance provided with a windshield having at least one wall element (2, 10, 12, 20, 24), which is provided with an electrically conductive coating (62), and having an electrical connection (66) for the coating. An electrical test device (68) is additionally provided, which is integrated into the precision balance and with which it is possible to check whether the coating (62) is connected to the electrical connection (66).

Abstract: Brackets and are disposed on the back surface of an upper case on which a pair of molded members and constituting a cylindrical structure forming a rear wall of a windproof case are erected. At one end of each of the brackets, the bracket is electrically connected to the molded member and the bracket is electrically connected to the molded member by screws of the upper case, and the brackets are electrically connected to a lower case by screws. Further, a metal plate on the upper case is electrically connected via a metal member fixed to the cylindrical structure.

Abstract: A weighing chamber in a shape of a transparent cuboid with sliding panels (1, 2, 3, 4, 5) assembled on structural guides (8) that are fastened using at least a single adjustable lock (13) blocking at least one panel in a way that their releasing enables sliding and disassembling the other panels. The fastening lock forms a profiled element, preferably an angle bar shaped component assembled in a detachable manner to the horizontal structural beam (8). The chamber comprises two vertical columns (6, 7) assembled at she hack comers of the chamber's interior which support the chamber structure (8) comprising a horizontal beam for assembling the fastening lock and guides for holding and sliding the top end side panels using grips (9, 10, 11).

Abstract: A semiconductor wafer metrology technique which corrects for the effect of electrostatic forces on an atmospheric buoyancy compensated weight force measurement of a semiconductor wafer. In one aspect a wafer is weighed in a faraday cage whose is measured independently. A change in the measured weight of the faraday cage can be used to correct the measure weight the wafer. In another aspect a direct electrostatic measurement can be converted into a weight correction using a predetermined correlation between an electrostatic charge measured by the charge meter and a weight error force. In another aspect the electrostatic measurement may be indirect, e.g. derived from varying the distance between the wafer and a grounded plate parallel to the wafer to effect a change in an electrostatic force between the grounded plate and the wafer.

Abstract: A precision balance provided with a windshield having at least one wall element (2, 10, 12, 20, 24), which is provided with an electrically conductive coating (62), and having an electrical connection (66) for the coating. An electrical test device (68) is additionally provided, which is integrated into the precision balance and with which it is possible to check whether the coating (62) is connected to the electrical connection (66).

Abstract: A work booth (22) having a work chamber (20) and an integrated scale (10) that includes a load carrier (12) which is arranged in the work chamber (20) of the work booth (22), a weighing system (14) which is arranged outside the work chamber of the work booth (22), and a coupling element (16) which connects the load carrier (12) to the weighing system (14). The work chamber (20) of the work booth (22) has a ventilation opening (28), through which air can be extracted from the work chamber (20) of the work booth (22).

Abstract: A scale with a weighing system (14), a weighing chamber (16) that is delimited by a windshield (18), and a drive for opening and closing the windshield (18). The scale has a load transferring part (32, 34) with which the weight of the load is transferred onto the weighing system (14). A decoupling mechanism is mechanically connected to the drive for rotating the windshield (18) such that the weighing system (14) is mechanically decoupled from the load transferring part in the load direction if the windshield (18) is open in order to not introduce transverse forces into the weighing system (14) during loading of the weight.

Abstract: A laboratory instrument for the preparation of samples includes a base housing with a work compartment enclosed by protective walls, at least one multifunctional work head having the ability to turn about a rotary axis pivotally supported on the base housing. At least two defined functional positions that can be aligned with at least one container platform which is arranged in the work compartment. The first functional position contains a receiving device which serves to hold a dosage-dispensing device with free-flowing dosage material, and each of the other functional positions contains an additional device. At least one of the protective walls has a cutout opening, and the at least one multifunctional work head is arranged partially in the cutout, so that portions of the at least one multifunctional work head lies both inside and outside of the work compartment.

Abstract: A draft shield (31) for a balance (32) has a box-like frame that encases the balance and a housing (40, 40a, 40b) thereof. The draft shield stands by itself on the same work surface (33) as the balance, leaving clear space on at least the sides of the housing. Front and rear walls of the draft shield have bottom edges arranged above the work surface, so that a display- and operating part (42) of the balance protrudes to the outside below the front wall and that the rear part of the housing remains accessible. Side walls and a ceiling wall allow at least portions thereof to be individually opened. A centering and bottom-closure part (43) is adapted to be seated or fastened on a top surface (41a) of the housing, with an outside border contour (45) that matches an inside contour of the box-like frame.

Abstract: A balance having at least one adjusting device (2, . . . ) having a drive, wherein the drive of the adjusting device is configured as a fluidic drive (4, . . . ), to which pressure can be applied by a pressure source disposed outside the scales via a pressure connection.

Abstract: A windshield for attaching and detaching to an electronic scale includes a plurality of mechanism for the attaching and detaching. Each of the mechanisms includes a latch which engages a member generally found on conventional electronic seals.

Abstract: A roll-top shield for weighing scales including a stationary hood 11 and a rotatable hood 12, both being made of a transparent material. Right and left side walls of the rotatable hood 12 are rotatably secured to right and left side wall of the stationary hood 11, respectively by means of pins 13a and 13b, respectively extending in the horizontal direction. By rotating the rotatable hood 12 over the stationary hood 11, an opening having a large size can be obtained, and a large or elongated article can be easily put on and off a weighing dish of a weighing device through the opening. When the rotatable hood is stopped at any desired position between a closed position and an open position without holding by hand, the opening having a desired size can be obtained, while both hands of a user are free.

Abstract: A draft protection device (2) has a wind-blocking body (20; 21) that consists of at least two panel elements (20A,20B, 20C; 21A, 21B) and partially encloses the weighing compartment of a balance (1) in which a weighing pan (15) is arranged. The wind-blocking body (20; 21) can be selectively positioned by hand in at least two different orientations. In each of the different orientations at least one opening is available for access to the weighing compartment. The wind-blocking body (20; 21) can be positioned by the user in such a way that the openings resulting from the differently oriented positions allow access to the weighing compartment from different directions.

Abstract: A composition when used as an analgesic comprising a metabolite of a compound of Formula II wherein R1 is H or Me, R2 is OH, R3 is H; or R2 and R3, taken together, are O; R4 is H or Me, R5 and R6, taken together, are O; R7 is H or Me, R8=H, OH, OAc, SH, SAc, Cl, Br, F together with a pharmaceutically acceptable diluent.

Abstract: A sample changer for a balance (1) with a weighing pan (18) has at least two sample carriers (3) that are spaced apart from each other. Each sample carrier is configured to receive at least one weighing-object unit and transport the weighing-object unit to the weighing pan (18). An individual draft-shield element (4) consisting at least in part of a transparent material is arranged above each of the sample carriers (3), closing off a sample space laterally and from above.

Abstract: A roll-top shield for weighing scales including a stationary hood 11 and a rotatable hood 12, both being made of a transparent material. Right and left side walls of the rotatable hood 12 are rotatably secured to right and left side wall of the stationary hood 11, respectively by means of pins 13a and 13b, respectively extending in the horizontal direction. By rotating the rotatable hood 12 over the stationary hood 11, an opening having a large size can be obtained, and a large or elongated article can be easily put on and off a weighing dish of a weighing device through the opening. When the rotatable hood is stopped at any desired position between a closed position and an open position without holding by hand, the opening having a desired size can be obtained, while both hands of a user are free.

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 panels is slidable by means of a guiding device (17, 20) to open and close the weighing compartment (4). The balance (1) further has a handle (13) for lifting the balance (1) off a support surface and/or for carrying the balance (1).

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 panels is slidable by means of a guiding device (17, 20) to open and close the weighing compartment (4). The balance (1) further has cutout passages (20) in the side wall panels (5, 6), the front wall panel (7), the top cover panel (12), and/or the rear wall of the weighing compartment, so that cables and/or conduits can be introduced from the outside into the weighing compartment.

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 scale with a transiently visible display includes: an enclosure having an upper surface; a measurement device disposed in the enclosure; and a display coupled to the measurement device and attached to the enclosure beneath the upper surface, the display displaying a measurement value only when the display is an active state. Activation of the measurement device places the display in the active state whereas deactivation removes the display from the active state. The enclosure obscures the display from visibility when the display is not in the active state. Optionally, the scale may include a facade beneath the upper surface and a shutter adjacent the facade and covering the display, the shutter being coupled to the measurement device. The shutter opens to reveal the display during activation. The enclosure obscures the facade and the shutter from recognition when the measurement device is not in the active state.

Abstract: A sample changer for a balance (1) with a weighing pan (18) has at least two sample carriers (3) that are spaced apart from each other. Each sample carrier is configured to receive at least one weighing-object unit and transport the weighing-object unit to the weighing pan (18). An individual draft-shield element (4) consisting at least in part of a transparent material is arranged above each of the sample carriers (3), closing off a sample space laterally and from above.

Abstract: An analytical balance includes a balance housing having a base area and back structure, a balance scale, and a wind guard encircling the balance scale. The wind guard includes a base surface formed by the base area, a back wall formed by the back structure, a fixed front pane, movable side panes, and a movable upper sliding door. The side panes and the upper sliding door can be opened or closed manually or by motor. The fixed front pane has no frame and is fastened to the base area. The side panes are guided on the base area and are secured on the back structure, to prevent tilting. The upper sliding door is guided by at least one sliding guide on the back structure. This configuration provides an open view of the goods being weighed that is essentially unobstructed from all sides, as well as ready access thereto.

Abstract: A balance with a wind guard moved by a motor whereby the position of the moveable walls of the guard are monitored by a sensor. An electronic memory is provided for the desired end position of the moveable wall element. The desired end position of the removable walls can be stored in this memory in a learning phase and when the walls are opened by the motor, they are opened only up to a preselected position. This minimizes the time for opening and closing the weighing area and diminishes exposure to air turbulence within the weighing area. This intuitively and flexibly assigns wall elements to user keys.

Abstract: A windscreen for a weighing scale apparatus includes a base, stationary vertical front and rear walls, a horizontal top wall, and a pair of opposed slidable side walls adapted to cooperate with the base, front, rear and side walls to define a weighing chamber containing a weighing pan. Slide means including an upper guide member, a lower guide member and a lower slide member are provided to connect at least one of the side walls with the housing for sliding movement between closed and open positions relative to the housing.

Abstract: An enclosure for housing electronic circuitry having a base and a cover with side walls includes a non-exposed fastening mechanism for securing, sealing, centering, and releasing the cover relative to the base. The fastening mechanism includes a ledge on the inside of a cover side wall and a restraining clip having a fixed leg mounted to the base and a flexible leg movable towards and away from the fixed leg and which engages the ledge when the cover is positioned on the base. A resilient gasket is fastened to the cover and positioned to seal the cover to the base and to be resiliently compressed when the cover is positioned on the base. The resilient compression of the gasket maintains the flexible leg in contact with the ledge to secure the cover to the base. The flexible leg also maintains the cover side wall away from the base. Several restraining clips are spaced apart on the base so that the flexible legs center the cover in at least one direction relative to the base.

Abstract: A weighing scale housing has a top cover wall removably fastened to the housing rear wall, whereby after the top wall has been unfastened and removed from the rear wall, the transparent side and front walls of the housing may be removed from the housing base for cleaning.

Abstract: A top or side wall of a weighing scale housing includes a plurality of relatively movable segments that are slidably displaceable between closed and open positions, thereby to afford access to a weighing chamber defined within the housing, at least the longitudinal edge portions of the segments being in continuous overlapping relation. The end portions of the segments are guided within guide grooves formed in the housing wall on opposite sides of an access opening contained therein. Catch devices connected with the longitudinal edges of successive segments are engaged upon displacement of a first segment relative to the housing, thereby to effect corresponding displacement of a second segment.

Abstract: Weighing apparatus of the windscreen type including a housing having a pair of vertical side walls that are movable between opened and closed positions relative to the housing, thereby to afford access to a weighing pan contained within the housing weighing chamber, characterized by the provision of a lever arrangement for opening either or both of the side walls. A pair of operating levers (77,79) arranged generally end-to-end transversely beneath the housing extend at their remote ends beyond opposite sides of the housing for selective connection with the associated side wall, respectively, the adjacent ends of the levers being movably connected with the housing, the levers also being connected with each other by a coupling plate (89) that is slidably connected for displacement forwardly and rearwardly of the housing.

Abstract: A weighing scale housing (9) includes a base (21), vertical front (19), rear (17), and side (23,25) walls cooperating with the base to define a weighing chamber (3) containing a movable weighing pan (5), characterized in that at least one of the side walls includes a plurality of planar side wall segments (27, 29; 31, 33) arranged at an obtuse angle, the one side wall being mounted for movement along an arcuate path between an open position affording access to the weighing pan, and a closed position closing the weighing chamber. When in the open position, the side wall is adjacent the rear wall, and when in the closed position, the forward vertical edge (51,53) of one segment engages the rear surface of the front wall, and the rear vertical edge portion (55, 57) of the other segment engages an end portion of the rear wall, thereby tightly sealing the weighing chamber.

Abstract: A draft protection device for a precision balance includes a base and a stationary rear wall connected to the base. The top of a front pane is connected through two connecting bars to the rear wall. The draft protection device further includes two sliding doors which are slidably mounted in longitudinal guides in the connecting bars and in the base. Racks are mounted in the areas of the upper edge and of the lower edge of at least one of the sliding doors. Pinions connected to each other through a vertically extending shaft mounted at the rear wall mesh with the racks. The shaft may be driven by an electric drive.

Abstract: Electronic weighing apparatus (3) is provided including a transparent cylindrical cover member (13) defining a weighing chamber (1) within which the load weighing pan is contained. The cover member contains an access opening (16) and is rotatable about its axis relative to a concave housing wall portion within which it partially concentrically extends. The cover member is rotatable relative to the housing between closed and open positions in which the access opening is contained within and remote from the concave wall portion, respectively. A radially displaceable member (25) is biased by a spring (29) to close the access opening in a tightly sealed manner when the cylindrical cover member is in the closed position.

Abstract: A balance with a wind guard moved by a motor whereby the position of movable walls of the guard are monitored by a sensor. An electronic memory is provided for the desired end position of the movable wall elements. The desired end position of the removable walls can be stored in this memory in a learning phase and when the walls are opened by the motor, they are opened only up to a preselected position. This minimizes the time for opening and closing the weighing area and diminishes exposure to air turbulence within the weighing area.

Abstract: A protective wind screen (9) for weighing scales is provided that is of hollow generally tubular construction adapted for vertical mounting on the upper surface (15) of the scale housing (3) concentrically about the movable weighing pan (7). The wind screen includes a plurality of movably connected wall members at least one of which is of U-shaped construction including a base portion and a pair of spaced upwardly extending leg portions (25, 27) between which is a plate (17) is mounted. Preferably, the plate is mouned for removal from the U-shaped wall member, thereby to permit access for initial weighing adjustment of the scale, or for loading of the scale. A mounting shoulder is provided on the housing for preventing lateral movement of the wind screen when mounted on the housing upper surface.

Abstract: A hinged dust cover used in combination with an electronic balance whereby the cover converts to an air screen during weighing operations. In the fully closed position the cover protects the weighing pan and various controls and displays from the ingress of dust and other contaminants as well as inadvertent operation. In the fully open position full access by the balance's operator is available to the weighing pan and controls. In the cover's intermediate position, the cover forms an enclosure about the weighing pan thereby isolating the weighing pan and mass being weighed from dust and air movement while at the same time making the various controls fully available to the balance's operator.

Abstract: An electronic microbalance shielded against static effects by surrounding the balance pan with a glass or plastic material which has an electrically conducting antistatic surface on the shield.

Abstract: A wind guard for a balance is suggested which consists of at least two cylindrically curved wall elements, in which each wall element is connected to a corresponding segment of the circular covering surface. In this manner, the balance scale is readily accessible both from the side and also from above when the wind guard is open.

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: A weighing apparatus is provided with a wind shielding arrangement for protectively enclosing a load-receiving scale member. A plurality of symmetrical curvilinear concave transparent shell-like wind shield sections of unequal diameters of generation are concentrically mounted on the scale housing above the load-receiving pan for relative rotational movement about a common axis between a closed protective condition, and an open condition affording access to the scale pan. In one embodiment, a pair of shield sections have generally coplanar edge portions mounted in a pair of concentric circular grooves, respectively, contained in a support on the upper surface of the housing adjacent the load receiving member. The inner shield section is retained in its associated groove by a resilient annular retainer ring that extends radially outwardly above a radially inwardly extending lip portion on the lower edge of the inner shield section.

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: In a balance, having a top mounted scale that is protected by a box-like structure (2) consisting of glass, is set on the housing base (1) of the balance. The box-like structure encloses a weighing area (5) on all sides around the balance scale (28) of the housing base (1). The front side of the structure (2), which faces the display and operating console (3), forms a load carrying vertical pane (6) consisting entirely of glass which is connected to a glass back wall (7) by at least one holding and guide track (15, 16) which runs from the upper edge of the front pane to the upper edge of the back pane parallel to the longitudinal axis of the housing, limiting the weighing area (5) at the top. The two side walls of the structure (2) are constructed as all-glass sliding doors (8, 10) which are guided at the bottom in the housing base (1) and at the top as bent side extensions (9, 11) in the associated guide and holding track (15, 16).