Acceleration pickup

• US 5,005,414 A
• Filed: 05/03/1989
• Issued: 04/09/1991
• Est. Priority Date: 05/03/1988
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Seipler, Dieter, Holland, Martin, Ziegenbein, Botho
• Primary Examiner(s): CHAPMAN JR, JOHN E
• Application Number:
  US07/347,330
• Time in Patent Office: 706 Days
• Field of Search: 73/517 R, 338/2, 338/5
• US Class Current: 73/514.33
• CPC Class Codes: G01P 15/123 by piezo-resistive elements, e.g. semiconductor strain gauges

Abstract

An acceleration pickup for releasing occupant protecting devices in power vehicles has a housing, a ceramic plate which acts as a bending spring and is clamped at its one end in the housing, and expansion-sensitive resistances arranged in the ceramic plate. The housing is composed of several layers of ceramic structural parts and is produced by a thick film technique.

Claims

1. An acceleration pickup for releasing occupant protecting devices in power vehicles, comprising a housing;

a ceramic plate which forms a bending spring and is clamped at least at its one end in said housing; and

expansion-sensitive resistances arranged on said ceramic plate, said housing being composed of several layers of ceramic parts and produced, together with said bending spring and said resistances, by a thick film technique.

2. An acceleration pickup as defined in claim 1, wherein said bending spring has an upper surface and a lower surface, said resistances being arranged on said upper surface and said lower surface of said bending spring, the resistances being connected with one another at least in a half Wheatstone bridge circuit.

3. An acceleration pickup as defined in claim 1, wherein said bending spring is formed as a disc and provided with at least three bending webs which arrange said bending spring in said housing.

4. An acceleration pickup as defined in claim 1, wherein said bending spring is formed as an equilateral triangle and provided with bending bars located in corners of said triangle and mounting said bending spring in said housing.

5. An acceleration pickup as defined in claim 1, wherein said housing has an upper surface and a lower surface;

and further comprising an evaluating circuit connected with said resistances and arranged on at least one of said surfaces of said housing.