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1. WO1981003077 - MEANS FOR ADJUSTING THE EXTREME POINTS OF THE MOVEMENT OF THE PISTON IN A WORKING CYLINDER

Publication Number WO/1981/003077
Publication Date 29.10.1981
International Application No. PCT/FI1981/000029
International Filing Date 16.04.1981
IPC
G01D 5/165 2006.01
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED BY A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; TRANSFERRING OR TRANSDUCING ARRANGEMENTS NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
5Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
12using electric or magnetic means
14influencing the magnitude of a current or voltage
16by varying resistance
165by relative movement of a point of contact and a resistive track
CPC
G01D 5/165
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
5Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
12using electric or magnetic means
14influencing the magnitude of a current or voltage
16by varying resistance
165by relative movement of a point of contact ; or actuation; and a resistive track
Applicants
Inventors
Priority Data
80123918.04.1980FI
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MEANS FOR ADJUSTING THE EXTREME POINTS OF THE MOVEMENT OF THE PISTON IN A WORKING CYLINDER
(FR) MOYEN DE REGLAGE DES POINTS EXTREMES DE LA COURSE DU PISTON DANS UN CYLINDRE DE TRAVAIL
Abstract
(EN)
The means comprises a variable resistance (R1), two set resistances and two comparing members which compare the variable resistance to these set resistances and give a control signal to the control valve of the working cylinder when the value of the variable resistance (R1) is the same as the value of either one of the set resistances. The variable resistance (R1) is arranged adjacent to the path of movement of the piston in the working cylinder and comprises a resistance element (4) and a strip of magnetic material (5) which is located on the opposite side of the resistance element (4) relative to the piston and which has laterally projecting flexible transverse strips (6). A part (3) of the piston is formed as a magnet whereby, as the piston moves along the adjusting resistance, said transverse strips (6) are successively bent into engagement with the resistance element (4) and, accordingly, the value of the resistance changes as the piston moves therealong.
(FR)
Moyen de reglage des points extremes de la course du piston dans un cylindre de travail. Le moyen comprend une resistance variable (R1), deux resistances fixes et deux organes de comparaison qui comparent la resistance variable avec les resistances fixes et envoient un signal de commande a la soupape de commande du cylindre de travail lorsque la valeur de la resistance variable (R1) atteint la meme valeur que celle de l"une des deux resistances fixes. La resistance variable (R1) est disposee adjacente au chemin de la course du piston dans le cylindre de travail et comprend un element de resistance (4) et une bande de materiau magnetique (5) situee sur le cote oppose de l"element de resistance (4) par rapport au piston et possedant des bandes transversales flexibles (6) en saillie laterale. Une partie (3) du piston est formee comme un aimant et, lorsque le piston se deplace le long de la resistance de reglage, les bandes transversales (6) sont courbees successivement pour s"engager avec l"element de resistance (4) et, de ce fait, la valeur de la resistance varie en fonction du deplacement du piston le long de celle-ci.
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