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:
May. 16, 1995
Filed:
Jun. 16, 1994
Applicant:
Inventors:
Steve Ritchie, Evanston, IL (US);
Carl A Biagi, Chicago, IL (US);
Assignee:
Williams Electronics Games, Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A63F / ;
U.S. Cl.
CPC ...
2731 / ; 2731 / ; 2731 / ; 2731 / ;
Abstract
The play feature of the invention comprises a ball well and electromagnetic coil. A ball sensor is located near the well entrance to signal when a ball is detected. The electromagnet, disposed at the well entrance, attracts the ball from the playfield into the well where it is retained. To eject the ball, the magnet is reenergized and the ball is ejected form the well onto the playfield.