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:
Jan. 15, 1991
Filed:
Jan. 09, 1990
Marcel Margulies, Scarsdale, NY (US);
The Perkin-Elmer Corporation, Norwalk, CT (US);
Abstract
A mass filter for charged particles includes a cylindrical conductive housing at ground potential and an array of linear conductors arranged in parallel in the housing and divided equally into four subarrays. The conductors of each subarray lie in one of four planes having a tubular arrangement with a square cross section on the longitudinal axis of the housing. The conductors have a substantially uniform distribution in the planes. A dedicated voltage is applied to each conductor in each subarray, the voltages being selected cooperatively and with the dimensions of the housing and the square cross section, such that a quadrupole type of electric field is generated within the tubular arrangement. Equations are disclosed for determining the voltages.