CH648511A5 - DEVICE FOR PREPARING CONCRETE. - Google Patents
DEVICE FOR PREPARING CONCRETE. Download PDFInfo
- Publication number
- CH648511A5 CH648511A5 CH4886/82A CH488682A CH648511A5 CH 648511 A5 CH648511 A5 CH 648511A5 CH 4886/82 A CH4886/82 A CH 4886/82A CH 488682 A CH488682 A CH 488682A CH 648511 A5 CH648511 A5 CH 648511A5
- Authority
- CH
- Switzerland
- Prior art keywords
- aggregates
- blades
- hopper
- volumetric measurement
- weighing hopper
- Prior art date
Links
- 239000004567 concrete Substances 0.000 title claims description 16
- 238000005259 measurement Methods 0.000 claims description 17
- 239000000523 sample Substances 0.000 claims description 12
- 238000005303 weighing Methods 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 239000002671 adjuvant Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000001033 granulometry Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
- G01F23/2921—Light, e.g. infrared or ultraviolet for discrete levels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/0404—Proportioning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/0454—Volumetric measuring devices, e.g. for consecutively delivering predetermined volumes of ingredients
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/28—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement
- G01F11/284—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement combined with electric level detecting means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/226—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water measuring the braking of a rotatable element
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/22—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for apportioning materials by weighing prior to mixing them
Description
L'invention concerne un dispositif de préparation de bétons comportant au moins un silo contenant des granulats, placé au-dessus d'une trémie peseuse sous laquelle est disposé un mélangeur-malaxeur recevant les liants et adjuvants secs et hydrauliques. The invention relates to a device for preparing concrete comprising at least one silo containing aggregates, placed above a weighing hopper under which is placed a mixer-kneader receiving the dry and hydraulic binders and adjuvants.
Une centrale à béton est généralement constituée A concrete plant is generally set up
— de silos ou réservoirs permettant de stocker les granulats amenés de façon connue dans ceux-ci, - silos or tanks allowing the aggregates brought in known manner to be stored therein,
— de silos contenant les liants, - silos containing binders,
— de silos contenant des adjuvants éventuels, - silos containing any additives,
— d'un approvisionnement en eau, - a water supply,
— de moyens de mesure des différents composants du béton, - means for measuring the various components of concrete,
— d'un mélangeur-malaxeur assurant l'homogénéité du béton prêt à l'emploi. - a mixer-kneader ensuring the homogeneity of the ready-mixed concrete.
Les différents composants sont dosés, avant d'être mélangés, par mesure de leur poids et/ou de leur volume, selon leur nature. The various components are dosed, before being mixed, by measuring their weight and / or their volume, depending on their nature.
La méthode pondérale présente des inconvénients majeurs lorsqu'il s'agit de préparer des bétons dits légers à cause des densités différentes — et faibles — des granulats employés, parmi lesquels on peut citer la pierre ponce, les pouzzolanes, les laitiers granulés, concassés ou bouletés, les billes de verre. La densité de ces granulats légers varie en fonction de leur composition, de leur granulométrie, de leur teneur en eau, qui est loin d'être négligeable après leur lavage préparatoire. The weight method has major drawbacks when it comes to preparing so-called light concretes because of the different - and low - densities of the aggregates used, among which mention may be made of pumice, pozzolans, granulated, crushed or pelletized, glass beads. The density of these light aggregates varies according to their composition, their granulometry, their water content, which is far from negligible after their preparatory washing.
Par simplification et commodité, les composants du béton sont seulement pesés; pour unmême poids, les variations de volume peuvent être importantes et entraîner des écarts de qualité inacceptables. For simplicity and convenience, the concrete components are only weighed; for the same weight, variations in volume can be significant and lead to unacceptable quality differences.
Si le même poids de granulats. légers occupe un volume variant de ± 10%, les autre«; composants ayant une densité peu variable, le béton qui en résultera n'aura pas des caractéristiques constantes tant au point de vue de la résistance mécanique qu'au point de vue du coefficient thermique. If the same weight of aggregates. light occupies a volume varying by ± 10%, the other “; components having a variable density, the concrete which will result from it will not have constant characteristics as well from the point of view of the mechanical resistance as from the point of view of the thermal coefficient.
L'invention a pour but d'adapter un dispositif permettant une mesure volumêtrique constante des granulats, en combinaison avec la mesure de leur poids, de façon qu'à l'aide d'appareils simples, éventuellement enregistreurs, il soit possible de connaître à tout moment la densité des granulats utilisés, de l'enregistrer automatiquement afin de la contrôler et de surveiller ainsi les quantités mises en œuvre. Tout incident d'approvisionnement sera signalé à l'aide d'un répétiteur optique ou sonore des indications du dispositif. The object of the invention is to adapt a device allowing a constant volumetric measurement of the aggregates, in combination with the measurement of their weight, so that using simple devices, possibly recording, it is possible to know at at any time the density of the aggregates used, to record it automatically in order to control it and thus monitor the quantities used. Any supply incident will be reported using an optical or audible repeater of the device indications.
A cette fin, le dispositif selon l'invention est caractérisé par le fait 5 que des moyens de mesure volumêtrique des granulats coopèrent avec des moyens de mesure pondérale, afin d'obtenir des bétons de caractéristiques prédéterminées et constantes. To this end, the device according to the invention is characterized in that the means for volumetric measurement of the aggregates cooperate with means for weight measurement, in order to obtain concretes with predetermined and constant characteristics.
Selon une forme de réalisation de l'invention, les moyens de mesure volumêtrique des granulats sont constitués par une sonde à io rotation commandée, placée sous le silo des granulats, composée de pales en bout d'un arbre moteur, ces pales étant situées à l'intérieur de la trémie peseuse, à une distance réglable de la vanne d'écoulement des granulats à laquelle ces pales sont asservies, de façon que la rotation des pales commande l'ouverture et la fermeture de ladite 15 vanne. According to one embodiment of the invention, the means for volumetric measurement of the aggregates are constituted by a probe with controlled rotation, placed under the silo of the aggregates, composed of blades at the end of a motor shaft, these blades being located at inside the weighing hopper, at an adjustable distance from the aggregate flow valve to which these blades are controlled, so that the rotation of the blades controls the opening and closing of said valve.
Selon une autre forme de réalisation de l'invention, les moyens de mesure volumêtrique des granulats sont constitués par au moins un détecteur de proximité placé sur les bords intérieurs de la trémie peseuse. According to another embodiment of the invention, the means for volumetric measurement of the aggregates consist of at least one proximity detector placed on the inner edges of the weighing hopper.
20 Selon une autre forme de réalisation, les moyens de mesure volumêtrique des granulats sont constitués par au moins une cellule photo-électrique placée à l'intérieur de la trémie peseuse, la partie émettrice étant séparée de la partie réceptrice de façon que le faisceau optique soit interrompu lorsque le volume des granulats dans la 25 trémie atteint un niveau prédéterminé. According to another embodiment, the means for volumetric measurement of the aggregates consist of at least one photoelectric cell placed inside the weigh hopper, the transmitting part being separated from the receiving part so that the optical beam is interrupted when the volume of the aggregates in the hopper reaches a predetermined level.
Le principal avantage apporté par l'invention réside dans la simplicité du dispositif et dans son efficacité quant à l'obtention de caractéristiques constantes des bétons produits par des centrales ainsi équipées. The main advantage provided by the invention lies in the simplicity of the device and in its effectiveness in obtaining constant characteristics of the concretes produced by plants thus equipped.
30 Les avantages ressortiront mieux de la description, faite à titre d'exemple, de formes de réalisation du dispositif et du dessin dans lequel la fig. 1 est un schéma d'une centrale à béton; The advantages will emerge more clearly from the description, given by way of example, of embodiments of the device and of the drawing in which FIG. 1 is a diagram of a concrete plant;
la fig. 2 est une vue schématique d'un ensemble silo - trémie -35 malaxeur; fig. 2 is a schematic view of a silo - hopper -35 mixer assembly;
la fig. 3 est une vue schématique d'un dispositif avec sonde électromécanique, et la fig. 4 est un schéma d'un dispositif muni de cellules photo-électriques. fig. 3 is a schematic view of a device with an electromechanical probe, and FIG. 4 is a diagram of a device provided with photoelectric cells.
40 La fig. 1 représente une centrale à béton constituée principalement de silos 1 placés au-dessus d'une trémie peseuse 2, munie de moyens d'affichage et d'enregistrement des poids,, se vidant par gravité dans un mélangeur-malaxeur 3 comportant des moyens d'évacuation du béton prêt à l'emploi. 40 Fig. 1 shows a concrete batching plant consisting mainly of silos 1 placed above a weighing hopper 2, provided with means for displaying and recording weights, emptying by gravity into a mixer-kneader 3 comprising means of disposal of ready-mixed concrete.
45 Les silos 1 ont une embase conique 10, munie d'un obturateur du type casque 11, prolongée par un couloir de déversement 12 cylindrique. 45 The silos 1 have a conical base 10, provided with a shutter of the helmet type 11, extended by a cylindrical discharge corridor 12.
La fig. 3 représente une vue en coupe de la trémie peseuse 2 .placée sous le silo 1, à l'intérieur de laquelle sont situées les ailettes 4 so en bout d'un arbre moteur 5 formant une sonde permettant la mesure du volume de granulats tombant du silo 1. Fig. 3 shows a sectional view of the weighing hopper 2. Placed under the silo 1, inside which the fins 4 are located so at the end of a motor shaft 5 forming a probe allowing the measurement of the volume of aggregates falling from the silo 1.
La sonde ainsi constituée est mise en rotation par un moteur électrique entraînant un arbre vertical terminé par des pales, en nombre variable, dont la forme est adaptée au granulat utilisé. La 55 sonde est mise en fonction en même temps que la centrale. The probe thus formed is rotated by an electric motor driving a vertical shaft terminated by blades, in variable number, the shape of which is adapted to the aggregate used. The 55 probe is put into operation at the same time as the control unit.
L'ouverture du casque 11 obturant le silo est commandée soit manuellement, soit par un appel automatique déclenché par l'asservissement d'un mécanisme de manœuvre du casque II à la mise en fonction de la sonde. The opening of the helmet 11 closing the silo is controlled either manually, or by an automatic call triggered by the servo of a mechanism for operating the helmet II when the probe is put into operation.
so Les granulats s'écoulent dans la trémie soit simultanément, soit silo par silo. n / a The aggregates flow into the hopper either simultaneously or silo by silo.
On aura pris soin au préalable de régler la hauteur des pales 4 de la sonde à l'aide de la bascule et à partir du granulat type dont la densité a été prise pour référence. Care will have been taken beforehand to adjust the height of the blades 4 of the probe using the rocker and from the standard aggregate whose density has been taken for reference.
65 Lorsque le cône, constitué par le granulat arrivant dans la trémie, atteint le niveau auquel les pales 4 de la sonde ont été réglées, leur rotation est interrompue, ce qui entraîne la fermeture des casques. 65 When the cone, consisting of the aggregate arriving in the hopper, reaches the level at which the blades 4 of the probe have been adjusted, their rotation is interrupted, which causes the helmets to close.
3 3
648 511 648,511
L'erreur volumêtrique d'une mesure à l'autre est faible, ce qui assure la constance des proportions choisies pour la réalisation d'un béton déterminé. The volumetric error from one measurement to another is low, which ensures the consistency of the proportions chosen for the production of a specific concrete.
La bascule indique le poids du volume de granulats en place dans la trémie, ce qui permet, par enregistrement, de connaître les 5 consommations ainsi que la densité effective du granulat. The scale indicates the weight of the volume of aggregates in place in the hopper, which allows, by recording, to know the 5 consumptions as well as the effective density of the aggregate.
Le nombre de silos et de sondes n'est pas limité, il en est de même pour le nombre de sondes par silo. There is no limit to the number of silos and probes, as is the number of probes per silo.
La fig. 4 représente une autre forme de réalisation du dispositif dans laquelle les moyens de mesure volumêtrique des granulats sont io constitués par au moins un œil électronique ou détecteur de proximité remplaçant la sonde mécanique précitée. Fig. 4 shows another embodiment of the device in which the means for volumetric measurement of the aggregates are constituted by at least one electronic eye or proximity detector replacing the aforementioned mechanical probe.
Lorsque le niveau atteint par les granulats dans la trémie peseuse 2' coupe le champ du rayon, la fermeture des casques 11 est déclenchée. Le détecteur de proximité est placé dans la trémie peseuse de façon que son efficacité ne soit pas perturbée par la chute des granulats; de préférence, plusieurs détecteurs sont mis en place et leur action est coordonnée avec l'ouverture et la fermeture des casques 11. When the level reached by the aggregates in the weighing hopper 2 'cuts the radius field, the closing of the helmets 11 is triggered. The proximity sensor is placed in the weighing hopper so that its efficiency is not disturbed by the fall of the aggregates; preferably, several detectors are put in place and their action is coordinated with the opening and closing of the helmets 11.
Dans une autre forme de réalisation, les moyens de mesure volumêtrique des granulats sont constitués par une ou plusieurs cellules photo-électriques placées dans la trémie peseuse, hors de la chute des granulats, de façon que l'interruption du faisceau optique par les granulats atteignant un niveau prédéterminé entraîne la fermeture des casques 11. In another embodiment, the means for volumetric measurement of the aggregates consist of one or more photoelectric cells placed in the weigh hopper, outside the fall of the aggregates, so that the interruption of the optical beam by the aggregates reaching a predetermined level causes the helmets 11 to close.
Il est précisé que le dispositif ainsi décrit peut être utilisé pour la mesure volumêtrique et pondérale de tout produit de densité variable tel que grains, engrais, etc. It is specified that the device thus described can be used for the volumetric and weight measurement of any product of variable density such as grains, fertilizers, etc.
R R
1 feuille dessins 1 sheet of drawings
Claims (4)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH4886/82A CH648511A5 (en) | 1982-08-16 | 1982-08-16 | DEVICE FOR PREPARING CONCRETE. |
| FR8312745A FR2531658B1 (en) | 1982-08-16 | 1983-08-02 | CONCRETE PREPARATION DEVICE |
| BE0/211330A BE897505A (en) | 1982-08-16 | 1983-08-10 | CONCRETE PREPARATION DEVICE |
| IT22513/83A IT1163890B (en) | 1982-08-16 | 1983-08-11 | CONCRETE PREPARATION DEVICE |
| IT8322616U IT8322616V0 (en) | 1982-08-16 | 1983-08-11 | CONCRETE PREPARATION DEVICE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH4886/82A CH648511A5 (en) | 1982-08-16 | 1982-08-16 | DEVICE FOR PREPARING CONCRETE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH648511A5 true CH648511A5 (en) | 1985-03-29 |
Family
ID=4284257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH4886/82A CH648511A5 (en) | 1982-08-16 | 1982-08-16 | DEVICE FOR PREPARING CONCRETE. |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE897505A (en) |
| CH (1) | CH648511A5 (en) |
| FR (1) | FR2531658B1 (en) |
| IT (2) | IT8322616V0 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4021161A1 (en) * | 1990-07-03 | 1992-01-09 | Colortronic Gmbh | METHOD AND DEVICE FOR DOSING |
| US6379031B1 (en) * | 2000-01-20 | 2002-04-30 | Aggregate Research Industries, Llc | Method for manufacturing concrete |
| CN103692554B (en) * | 2013-12-11 | 2016-02-17 | 王强 | A kind of withstand voltage slag charge bogey |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US851553A (en) * | 1906-03-27 | 1907-04-23 | Alvin Flavel Nims | Concrete-mixing machine. |
| US2109534A (en) * | 1935-06-27 | 1938-03-01 | Johnson Co C S | Central mixing plant |
| GB1083361A (en) * | 1965-01-19 | 1967-09-13 | Thomas Ind Automation Ltd | Apparatus including an electrode for detecting the level of a material in a container |
-
1982
- 1982-08-16 CH CH4886/82A patent/CH648511A5/en not_active IP Right Cessation
-
1983
- 1983-08-02 FR FR8312745A patent/FR2531658B1/en not_active Expired
- 1983-08-10 BE BE0/211330A patent/BE897505A/en not_active IP Right Cessation
- 1983-08-11 IT IT8322616U patent/IT8322616V0/en unknown
- 1983-08-11 IT IT22513/83A patent/IT1163890B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| IT1163890B (en) | 1987-04-08 |
| FR2531658A1 (en) | 1984-02-17 |
| BE897505A (en) | 1983-12-01 |
| IT8322513A0 (en) | 1983-08-11 |
| FR2531658B1 (en) | 1987-04-17 |
| IT8322616V0 (en) | 1983-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0441086B1 (en) | Method for the production and the distribution of food for animals, especially for piglets | |
| EP0507689A2 (en) | Automatic feeding device for a processing machine, particularly for processing plastic material, by homogeneous mixing of several products | |
| FR2499868A1 (en) | MIXER FOR CONTINUOUS MIXING OF GRANULAR OR PULVERULENT MATERIALS | |
| LU87578A1 (en) | DEVICE FOR DETERMINING THE TOPOGRAPHIC MAP OF THE LOADING SURFACE OF A TANK OVEN | |
| CH648511A5 (en) | DEVICE FOR PREPARING CONCRETE. | |
| FR3083866A1 (en) | DEVICE FOR ANALYZING FLUORESCENCE AND INFRARED SPECTROSCOPY | |
| FR2563999A1 (en) | GOLF BALL DISTRIBUTOR | |
| US4422760A (en) | Optical analyzing instrument having vibrating trough | |
| FR2594093A1 (en) | AUTOMATIC DOSING DEVICE, IN PARTICULAR FOR SOLID PRODUCTS | |
| EP0229787B1 (en) | Method and device for automatically measuring the content of a soluble component in a pulverulent product | |
| FR2531785A1 (en) | LIQUID SCINTILLOMETER | |
| FR2571512A1 (en) | SYSTEM FOR PHOTOGRAPHING SIDE SURFACES OF SOLID SAMPLES | |
| FR2573338A1 (en) | Carousel-type machine for preparing mixtures, especially cements. | |
| US2467791A (en) | Sample taker for moisture testing of dehydrated grain | |
| FR2675582A1 (en) | AUTOMATED PITCHER TRANSFER AND WEIGHING SYSTEM CONTAINING A RADIOACTIVE LIQUID BETWEEN A SAMPLING UNIT AND AN ANALYSIS CHAIN. | |
| FR2461931A1 (en) | LIQUID COUNTER | |
| FR2561068A1 (en) | APPARATUS FOR FREQUENTLY FEEDING POULTRY INTO AT LEAST ONE ROW OF CAGES | |
| EP0246711A2 (en) | A device for recognising the shape and dimension of bottles or the like | |
| SU401892A1 (en) | GRAIN TURKER | |
| FR2499241A1 (en) | Automatic electronic flowmeter - has measuring tube introduced in fluid conduit with ultrasonic transducer of wall for repeated liq. level measurement by echo detection | |
| SU415504A1 (en) | ||
| FR2732553A1 (en) | Food dispensing machine for fattening geese or other web-footed birds | |
| EP0349437B1 (en) | Apparatus for the automatic measurement of the apparent weight of a mud suspended in a liquid, system for the automatic measurement of the ponsar's index of such a mud, using the apparatus, and its use in the conduit in a plant for purifying waste water | |
| FR2835604A1 (en) | Method for measuring the volume of a solid body, especially a log, in which a measurement station is used to measure successive log sections that are then combined with length measurements to provide an accurate volume value | |
| US1100120A (en) | Automatic weighing-scale. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |