US3672220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Force-transducers
Assignee: Gemalto Terminals Ltd
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Filing: 1970-02-12
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Granted: 1972-06-27
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Expires: 1990-02-12
Abstract
Abstract Force-measuring apparatus having a composite strut with two bars which are to be maintained in transverse vibration at a common resonance frequency by electrical feedback, the frequency of vibration indicating the force applied to the composite strut.
Inventors
- 👤 Joram Agar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:20
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0033; G01L1/00; G01L1/10; G01L1/16; G01L1/162; G01L13/00; G01L13/02; G01L13/023; G01L9/0001; G01L9/0008; G01L9/0022
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
143 words
Force-measuring apparatus, including a composite strut-member and means for supporting the said composite strut-member, the composite strut-member embodying two end portions and a plurality of resilient struts, the said resilient struts being angularly disposed regularly about an axis and each said strut coupling the said end portions to one another, means for exciting transverse vibrations of the said struts substantially at a common resonance frequency, and means for providing a signal representative of the frequency of the said vibrations wherein one of the said end portions is secured to a forcetransmitting member which includes two walls of a container rigidly connected to one another, and the other of said end portions is secured to a further rigid wall of the said container movably connected to the said two walls, the said composite strut-member being housed in the container between the said two walls.
Claim 2
Dependent Claim
143 words
Force-measuring apparatus, including a composite strut-member and means for supporting the said composite strut-member, the composite strut-member embodying two end portions and a plurality of resilient struts, the said resilient struts being angularly disposed regularly about an axis and each said strut coupling the said end portions to one another, means for exciting transverse vibrations of the said struts substantially at a common resonance frequency, and means for providing a signal representative of the frequency of the said vibrations wherein one of the said end portions is secured to a forcetransmitting member which includes two walls of a container rigidly connected to one another, and the other of said end portions is secured to a further rigid wall of the said container movably connected to the said two walls, the said composite strut-member being housed in the container between the said two walls.
Claim 3
Dependent Claim
122 words
Force-measuring apparatus, including a composite strut-member and means for supporting the said composite strut-member, the composite strut-member embodying two end portions and a plurality of resilient struts, the said resilient struts being angularly disposed regularly about an axis and each said strut coupling the said end portions to one another, means for exciting transverse vibrations of the said struts substantially at a common resonance frequency, and means for providing a signal representative of the frequency of the said vibrations wherein the said composite strut-member is housed in a fluid-tight compartment of a container, wherein one of the said end portions is secured to a force-transmitting member which includes a chamber for fluid movably connected to a rigid wall of the said container.
Claim 4
Dependent Claim
122 words
Force-measuring apparatus, including a composite strut-member and means for supporting the said composite strut-member, the composite strut-member embodying two end portions and a plurality of resilient struts, the said resilient struts being angularly disposed regularly about an axis and each said strut coupling the said end portions to one another, means for exciting transverse vibrations of the said struts substantially at a common resonance frequency, and means for providing a signal representative of the frequency of the said vibrations wherein the said composite strut-member is housed in a fluid-tight compartment of a container, wherein one of the said end portions is secured to a force-transmitting member which includes a chamber for fluid movably connected to a rigid wall of the said container.
Claim 5
Dependent Claim
39 words
Apparatus as claimed in claim 2, wherein the other of the said end portions is secured to a further force-transmitting member which includes a further chamber for fluid movably connected to the said rigid wall of the said container.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |