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Machine translation
1. (WO1979000072) RATIO PRESERVING CONTROL SYSTEM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1979/000072    International Application No.:    PCT/US1978/000047
Publication Date: 22.02.1979 International Filing Date: 25.07.1978
IPC:
G02B 7/10 (2006.01), G06G 7/66 (2006.01)
Applicants:
Inventors:
Priority Data:
820005 28.07.1977 US
Title (EN) RATIO PRESERVING CONTROL SYSTEM
(FR) SYSTEME DE COMMANDE MAINTENANT UN RAPPORT CONSTANT
Abstract: front page image
(EN)An interlock mechanism for an operating system such as a zoom lens with at least first and second independently controllable operating parameters comprising sending means (11, 12) for generating control outputs which are the logarithmic value to a common base of the actual value of the operating parameter with which each control output is associated and control means (14) responsive to the difference between values of the outputs to change the actual value of one of the operating parameters as the actual value of the other operating parameter is changed to maintain a selected difference between the control outputs so that a selected prescribed ratio is maintained between the actual values of the operating parameters. The disclosure contemplates electromechanical, mechanical and electrical versions of the interlock mechanism.
(FR)Un mecanisme d"asservissement pour un systeme tel qu"une lentille a focale variable operant avec au moins un premier et un second parametres commandes independamment l"un de l"autre. Le mecanisme comprend des moyens emetteurs (11, 12) pour engendrer des sorties de commande qui ont une valeur logarithmique ramenee a une base commune de la valeur du parametre auquel est associee chaque sortie de commande, et des moyens de commande (14) sensibles a la difference entre les valeurs des sorties pour modifier la valeur presente d"un des parametres a commander lorsque la valeur presente de l"autre parametre est modifiee pour maintenir une difference choisie entre les sorties de commande de maniere que soit maintenue entre les valeurs des parametres le rapport choisi et impose. La description expose des versions electromecaniques, mecaniques et electriques du mecanisme d"asservissement.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)