US3771346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calibrating devices
Assignee: Moore Products Co
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Filing: 1972-06-21
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Granted: 1973-11-13
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Expires: 1992-06-21
Abstract
Abstract Structure is disclosed for applying a predetermined force for calibrating an instrument of the force bar type which controls the vibration of a tension element whose tension is related to an input force applied on the force bar, the calibrating force applying structure including a spring urged member selectively applying a predetermined force on the force bar.
Inventors
- 👤 T Huslin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:43
CPC Classifications
G; G01; G01L; G01L25/00; G01L1/00; G01L1/10; G01L1/106
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
119 words
In measuring apparatus, a force bar having a pivotal mounting, means for applying an input force on said force bar on one side of said pivotal mounting, a vibrating element connected to said force bar on the other side of said pivotal mounting and whose tension is proportional to the input force applied on said force bar, calibrating means for establishing a significant frequency of vibration in said vibrating element when said input force is at zero, said calibrating means comprising a force exerting member for exerting a predetermined calibrating force on said force bar on said other side of said pivotal mounting, and means for rendering said force exerting member ineffective during normal operation of said force bar.
Claim 2
Dependent Claim
119 words
In measuring apparatus, a force bar having a pivotal mounting, means for applying an input force on said force bar on one side of said pivotal mounting, a vibrating element connected to said force bar on the other side of said pivotal mounting and whose tension is proportional to the input force applied on said force bar, calibrating means for establishing a significant frequency of vibration in said vibrating element when said input force is at zero, said calibrating means comprising a force exerting member for exerting a predetermined calibrating force on said force bar on said other side of said pivotal mounting, and means for rendering said force exerting member ineffective during normal operation of said force bar.
Claim 3
Dependent Claim
41 words
Measuring apparatus as defined in claim 1 in which said calibrating force exerting member has a resilient member in engagement therewith, and a movable element is provided for altering the effect of said resilient member with respect to said force bar.
Claim 4
Dependent Claim
35 words
Measuring apparatus as defined in claim 1 in which said means for rendering said force exerting member ineffective includes a manually operable member movable to a position for rendering said calibrating force exerting member effective.
Claim 5
Dependent Claim
24 words
Measuring apparatus as defined in claim 1 in which said calibrating means has an adjustable portion for determining the magnitude of the calibrating force.
Claim 6
Dependent Claim
23 words
Measuring apparatus as defined in claim 2 in which a manually operable member is provided for releasing said resilient member for force application.
Claim 7
Dependent Claim
33 words
Measuring apparatus as defined in claim 5 in which said resilient member is a leaf spring, and an adjusting member is provided in engagement with said leaf spring for determining the calibrating force.
Claim 8
Dependent Claim
21 words
Measuring apparatus as defined in claim 5 in which said manually operable member has a resilient retracting member in engagement therewith.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |