T Bar Toggle Switch for Bubbles
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
A T-bar toggle switch is shown which can be used to transfer magnetic bubble domains back and forth between two shift registers, such as the input register (major) and a storage register (minor) in a major/minor loop memory. This toggle switch works with somewhat lower current than other transfer switches, and can be made to be normally off. The T-bar readout switch is shown in Fig. 1. Consider a bubble traveling down the right-hand leg of the minor loop from A to B to C, etc., in response to the reorientation of field H. At phase 4 it is at C, and at phase 1 at D. Position D is the critical position, since at the following phase 2 the bubble can go either to position E or E'. It is for this reason that the switch is called a "toggle" switch: a small current in the conductor will tip the bubble into position E or E'.