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:
Feb. 27, 1996
Filed:
Sep. 30, 1994
Lawrence E DeMar, Winnetka, IL (US);
Edward A Estes, Wheaton, IL (US);
Brian R Eddy, Addison, IL (US);
Patrick M Lawlor, Marengo, IL (US);
Williams Electronics Games, Inc., Chicago, IL (US);
Abstract
An electromagnet is mounted beneath the playfield. Sensors, such as optical switch pairs, are positioned on the playfield in operative relation with the electromagnet to detect the ball and to produce a signal in response thereto. The microprocessor, in response to such signals, briefly pulses the magnet to accelerate the ball or energizes the electromagnet for an extended period to grab and hold the ball. When the ball is held, the magnet is thereafter deenergized and briefly pulsed to propel the ball on the playfield. In one embodiment, a plurality of electromagnets are provided along a ball path which are operated sequentially by the game microprocessor to move the ball from magnet to magnet in a stepped manner.