Acceletometers adapted for efficient connection and disconnection

• US 4,947,690 A
• Filed: 06/29/1989
• Issued: 08/14/1990
• Est. Priority Date: 06/29/1989
• Status: Expired due to Fees

• Current Assignee: Endevco Corporation (Illinois Tool Works Inc.)
• Original Assignee: Alliedsignal Inc.
• Inventors: Cleveland, Lester G.
• Primary Examiner(s): Chapman, John
• Application Number:
  US07/374,403
• Time in Patent Office: 411 Days
• Field of Search: 73/493, 73/517 R, 73/654, 73/866.5, 310/329
• US Class Current: 73/654
• CPC Class Codes: G01N 2291/02827 Elastic parameters, strength or force
• CPC Class Codes: G01P 1/023 for acceleration measuring devices
• CPC Class Codes: G01P 15/09 by piezoelectric pick-up

Abstract

The invention provides an accelerometer (10) which can be connected to or disconnected from a support structure (12) by means of a single fastening component (18) while holding remaining structural components (14, 16, 20) at a fixed azimuthal position relative to the top surface (38) of the support structure (12).

Claims

1. An accelerometer adapted for facile securement to a support structure, comprising:

a housing structure that contains a sensing element;

a shaft rigidly secured to or integral with said housing structure;

said shaft extending to a distal end thereof in a direction away from said housing structure;

said shaft having a cylindrical portion between said housing structure and said distal end;

a bolt-like member coaxial with said cylindrical portion and having a hole which extends in said direction from a first end to a second end of said member;

said cylindrical portion extending through said hole and said member being easily rotatable about said portion;

said member being adapted for engagement with a torquing tool and having an outer surface which is adapted for engagement with said support structure; and

means for retaining said member in a substantially fixed axial position relative to said cylindrical portion whereby if said member is displaced in either axial direction, said shaft and said housing structure are carried therewith.

2. The invention of claim 1 wherein said shaft extends beyond said second end of said member, and wherein said retaining means comprises an annulet rigidly secured to said shaft and abutting said second end.

3. The invention of claim 2 wherein said retaining means cooperates with said housing structure to prevent axial displacement of said member relative to said cylindrical portion, said first end abutting said housing structure.

4. The invention of claim 1 wherein said retaining means is provided at least in part by an annular boss of said shaft.

5. The invention of claim 1 wherein said retaining means comprises a boss on said shaft and cooperates with said housing structure to render said member substantially immovable relative to said cylindrical portion in said axial directions.

6. An accelerometer adapted for securement to a support structure by a single fastening component, whereby all components of said accelerometer except said fastening component can be held at a substantially fixed azimuthal position relative to a top surface of said structure during said securement, comprising:

a housing structure that contains a sensing element;

a shaft rigidly secured to or integral with said housing structure;

said shaft extending to a distal end thereof in a direction away from said housing structure;

said shaft having a cylindrical portion between said housing structure and said distal end;

a bolt-like member coaxial with said cylindrical portion and having a hole which extends in said direction from a first end to a second end of said member;

said cylindrical portion being disposed in said hole and said member being easily rotatable about said portion;

said member being adapted for engagement with a torquing tool and having an outer surface which is adapted for engagement with said support structure; and

means abutting said second end for retaining said member to limit displacement thereof in said direction,

said member being substantially immovable relative to said cylindrical portion in axial directions, whereby if said member is displaced in either axial direction, said shaft and said housing structure are carried therewith.

7. The invention of claim 6, wherein said retaining means cooperates with said housing structure to render said member substantially immovable in said axial directions.

8. The invention of claim 6 wherein said retaining means comprises a boss on said shaft.

9. An accelerometer adapted for facile securement to a support structure, comprising:

a housing structure that contains a piezo-type sensing element;

a bolt-like member having an axially-extending hole formed therethrough;

said hole extending from a first end of said member which faces said housing structure to an oppositely-facing second end of said member;

said member being adapted for engagement with a torquing tool and having an outer surface which is adapted for engagement with said support structure; and

a cylindrical shaft rigidly secured to or integral with said housing structure and around which said member is rotatable;

said shaft being coaxial with said member and extending between said first and second ends;

said member being secured so as to be substantially immovable in axial directions thereof relative to said housing structure and to said shaft.