Browse Prior Art Database

Ball Switch

IP.com Disclosure Number: IPCOM000078308D
Original Publication Date: 1972-Dec-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Cummings, TF: AUTHOR

Abstract

A compact ball switch has been devised wherein a metallic ball is held in contacting position either by gravity, or by a magnet.

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Ball Switch

A compact ball switch has been devised wherein a metallic ball is held in contacting position either by gravity, or by a magnet.

In Figs. 1A to 1D, there is shown the ball switch 2 in its various operating positions. In Fig. 1A, a metallic ball 4 is shown in its closed position, being urged by gravity against contacts 6 and 8 to actuate a circuit 10. When switch 2 is rotated clockwise about central pin 12 to its position shown in Fig. 1B, the switch is opened by the rolling of the ball toward the inner wall of the switch. Even should the switch be rotated counterclockwise, as shown in Fig. 1C, a magnet 14 prevents the ball from falling back to its closed position.

In effect, the switch has two OFF positions, one due to gravity and one due to the holding force of the magnet. As seen in Fig. 1D, the ball can be tapped back to its original state (Fig. 1A) by hitting it with sufficient force to allow gravity to overcome the magnetic holding action.

When the individual switch of Figs. 1A-1D is incorporated in an array 18, as shown in Fig. 2, one can nudge individual OFF switches back to their respective ON states. Or, one can select a preset plastic cover, not shown, to nudge selected OFF switches back to their respective ON states simultaneously, thereby setting up a coded pattern of switches (for example, such a cover could be used to establish a complete search pattern for only a single pass on a card sorter; each cover could represent a different searc...