The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 1978
Filed:
Mar. 11, 1977
Erwin Buhrer, Schaffhausen, CH;
Other;
Abstract
The amount of liquid metal casting material poured into a mold from a receptacle located above the mold from pouring means in the bottom of the receptacle is controlled by continuously sensing the pressure head of the liquid metal casting material in the receptacle during pouring of the mold, numerically integrating to a constant value the product of the multiplication of a function of the pressure head and time, and controlling the pouring means to terminate the pouring of the mold when a predetermined set value is attained. Electronic control circuitry receives as an input signal a signal representing the pressure head of the liquid casting material within the receptacle and a control function is effected by the electronic control means to stop pouring when a selected predetermined amount of material has been introduced into a mold. The quantity of casting material poured into a filled mold is sensed and a feedback signal is provided to adjust the control function when the amount of casting material in the filled mold is found to deviate from a desired amount. Furthermore the electronic control circuitry may be equipped with a mechanism to sense variations in the rate of flow of the pouring device and to adjust for changes.