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Machine translation
1. (WO1979001143) CALIBRATION MECHANISM FOR A PRESSURE SWITCH
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1979/001143    International Application No.:    PCT/US1979/000285
Publication Date: 27.12.1979 International Filing Date: 30.04.1979
IPC:
H01H 35/26 (2006.01)
Applicants:
Inventors:
Priority Data:
910264 30.05.1978 US
Title (EN) CALIBRATION MECHANISM FOR A PRESSURE SWITCH
(FR) MECANISMES DE CALIBRAGE POUR COMMUTATEURS A PRESSION
Abstract: front page image
(EN)In the past, the ease of assembly in calibration mechanisms of the cam-type for pressure switches has not been acceptable. The present invention greatly improves the ease of assembly. The invention is used for actuating and calibrating pressure-type switches. A calibration mechanism (10) for a pressure switch (12) of the type utilizing a rotary cam (16) controls the setting of a spring-biased plunger (22) to establish pressure levels required to actuate the switch (12). The calibration mechanism (10) includes a support bracket (20) mounted on the switch (12) and a cam assembly including an integrally formed cam member (16) and a camshaft (18). A plunger adjustment mechanism includes a pivotally mounted lever (14) having a cam follower (42) in following engagement with the cam (16). The support bracket (20) defines a bore (50) adapted to receive the camshaft (18). The cam (16) has a range of rotational orientations in which the cam follower (42) engages the operative portion of the cam profile. The camshaft (18) includes a projection (56) extending radially therefrom which is axially disposed from the cam (16) a predetermined distance greater than the axial length of the bore (50) in the support bracket (20). The support bracket (20) defines a slot (54) extending from the bore (50). The cam assembly is assembled to the support bracket (20) by orienting the cam assembly relative to the bracket (20) such that the projection (56) on the camshaft (18) passes through the slot (54) as the camshaft (18) is inserted in the bore (50). The cam assembly is then rotated to the operable range of angular displacement in which the projection (56) is angularly offset from the slot (54), thus axially retaining the shaft (18) of the cam assembly in the bore (50) of the support bracket (20).
(FR)Autrefois, les difficultes d"assemblage de mecanismes de calibrage, du type a cames pour des commutateurs a pression etaient inacceptables. La presente invention ameliore l"assemblage. Un mecanisme de calibrage (10) pour un commutateur a pression (12) du type a cames rotative (16) commande le reglage d"un piston monte sur ressorts (22) pour etablir des niveaux de pression pour actionner le commutateur (12). Le mecanisme de calibrage (10) comprend une patte support (20) montee sur le commutateur (12) et un assemblage a cames comprenant une came (16) et un arbre a came (18) en une seule piece. Un mecanisme d"ajustement du piston comprend un levier pivotant (14) ayant un galet de came (42) suivant la came (16). La patte support (20) definit un alesage (50) adapte pour recevoir l"arbre a came (18). La came (16) possede une came d"orientation de rotation dans laquelle le galet de came (42) engage la partie active du profil de la came. L"arbre a came (18) presente une projection (56) s"etendant radialement et disposee axialement a une distance predeterminee de la came (16) superieure a la longueur axiale de l"alesage (50) dans la patte support (20). La patte support (20) delimite une fente (54) s"etendant a partir de l"alesage (50). L"assemblage a cames est assemble a la patte support (20) en orientant l"assemblage a cames par rapport a la patte support (20) de telle maniere que la projection (56) de l"arbre a cames (18) passe a travers la fente (54) lorsque l"arbre a came (18) est introduit dans l"alesage (50). L"assemblage a cames tourne selon la gamme active de deplacement angulaire dans laquelle la projection (56) est decalee angulairement de la fente (54), retenant ainsi axialement l"arbre (18) de l"assemblage a cames dans l"alesage (50) de la patte support (20).
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)