US3707722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact acceleration recording device
Assignee: Individual
•
Filing: 1971-10-05
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Granted: 1972-12-26
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Expires: 1991-10-05
Abstract
Abstract A weight disc has a wedge-like perimeter and is held between and by the inner edges of thin annular plates of plastic material in coaxial laminated state, the outer edges of the plates being fixedly held by an outer case which is secured to an object subject to possible impact. The disc responds to such impact by shifting from its original position to an impact position, its wedge-like perimeter driving into and along the interfacial seam between the plates to deform the same apart. The distance of the shifting of the disc is measured and referred to previously obtained data to determine the acceleration due to impact.
Inventors
- 👤 Kazu Itoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:46
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
159 words
An impact acceleration recording device comprising a circular weight disc constituting an inertia reactor and having a sharp peripheral edge of wedge shape in section passing through the disc axis, at least two thin plates made of a plastic material and disposed with an interfacial seam therebetween, said plates clamping from opposite sides the peripheral edge of said weight disc and holding the weight disc in an original position within the plates; and a case fixedly holding the outer edge portions of the plates and enclosing the plates and the weight disc, the weight disc responding to impact acceleration component imparted to the case in a direction parallel to the plates to shift from said original position to an indication position displaced therefrom as the peripheral edge thereof forceably advances into and along said interfacial seam, deforming the plates apart with the distance between the original and displaced positions being indicative of the magnitude of the impact acceleration component.
Claim 2
Dependent Claim
159 words
An impact acceleration recording device comprising a circular weight disc constituting an inertia reactor and having a sharp peripheral edge of wedge shape in section passing through the disc axis, at least two thin plates made of a plastic material and disposed with an interfacial seam therebetween, said plates clamping from opposite sides the peripheral edge of said weight disc and holding the weight disc in an original position within the plates; and a case fixedly holding the outer edge portions of the plates and enclosing the plates and the weight disc, the weight disc responding to impact acceleration component imparted to the case in a direction parallel to the plates to shift from said original position to an indication position displaced therefrom as the peripheral edge thereof forceably advances into and along said interfacial seam, deforming the plates apart with the distance between the original and displaced positions being indicative of the magnitude of the impact acceleration component.
Claim 3
Dependent Claim
27 words
The impact acceleration recording device according to claim 1, in which recording means are provided for recording a trace of the path travelled by the weight disc.
Claim 4
Dependent Claim
87 words
The impact acceleration recording device according to claim 2, in which the case further includes at least one transparent wall overlying one of the plates, said one plate having an opening therein, the weight disc being initially centered within said opening, the inner surface of said one wall being coated with an inscribable layer, and recording means comprising said inscribable layer and stylus means mounted on the weight disc and in contact with said inscribable layer to inscribe said trace of movement of said weight disc thereon.
Claim 5
Dependent Claim
31 words
The impact acceleration recording device according to claim 1, further comprising a reference directional mark provided on the outer surface of the case for indicating the installed orientation of the device.
Claim 6
Dependent Claim
45 words
The impact acceleration recording device as claimed in claim 1, wherein said plates are annular in form and are disposed in mutually coaxial laminated state with the circular inner edges of said plates clamping the peripheral edge of the weight disc from the opposite side.
Claim 7
Dependent Claim
27 words
The impact acceleration recording device according to claim 5, in which a total of four annular plates are involved, two on each side of the weight disc.
Claim 8
Dependent Claim
21 words
The impact acceleration recording device according to claim 5, in which the annular plates are made of annelaed aluminum sheet material.
Claim 9
Dependent Claim
27 words
The impact acceleration recording device according to claim 5, in which recording means are provided for recording a trace of the path travelled by the weight disc.
Claim 10
Dependent Claim
82 words
The impact acceleration recording device according to claim 8, in which the case is provided with at least one transparent wall extending parallel to the weight disc and overlying one of said annular plates, the inner surface of said transparent wall being coated with an inscribable layer and stylus means mounted on the weight disc and in contact with said inscribable layer to record the trace of movement of said disc with respect to said two thin annular plates supporting the same.
Claim 11
Dependent Claim
34 words
The impact acceleration recording device according to claim 9 in which an opening is provided in the center of said disc and a spring biased ball projects outwardly therefrom to form said stylus Means.
References Cited (Backward Citations)
US3218870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |