Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity
Reexamination Certificate
2003-03-06
2004-11-09
Cygan, Michael (Department: 2855)
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Viscosity
C073S054280
Reexamination Certificate
active
06813935
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to mechanical resonators and measuring instruments, such as viscometers or other instruments for measuring attributes of materials such as fluid media
BACKGROUND TO THE INVENTION
FIG. 1
shows a torsional resonant system consisting of two distinct but connected resonators; one resonator is formed by an inertial mass J
1
and its associated shaft K
1
and the other formed by an inertial mass J
2
and its shaft K
1
. The two shafts are connected at their ends so that, when the resonators are tuned to the same frequency, a vibrational node is formed at the shafts' junction,
In a practical arrangement it is necessary to physically support the resonator system in space. To prevent damping of the moving members, the most appropriate point of support is at any vibrational nodal position where there is zero or minimal displacement in resonance. Conventionally, a single support structure K
3
is located at the junction of the two shafts as shown schematically in FIG.
1
. However, if there is a slight imbalance of frequencies between the two resonator systems then there will be some displacement at the node and the rigidity of the support structure will influence the resonant characteristics of the overall system. Although frequency imbalance may be naturally expected to occur the complex involvement of mounting rigidity is undesirable.
Reducing the mounting stiffness by using a more compliant design and/or materials will diminish the effect of the stiffness of the structure K
3
(as described in GB-2281621) but compromises structural strength and thus significantly limits practical use. This invention describes a resonator support structure which has the virtues of high compliance to virtually eliminate detrimental effects of K
3
but to preserve structural strength for practical usage.
SUMMARY OF THE INVENTION
According to the invention a mechanical resonator system comprises two distinct resonators connected by a nexus and being capable of vibration in anti-phase with a first vibrational node in the region of the nexus and at least a second node, a compliant support in the region of the first node and a semi-rigid support in the region of the second node. Further features of the invention will be apparent from the following description of an exemplary embodiment.
REFERENCES:
patent: 1912343 (1933-05-01), Buckingham
patent: 1913331 (1933-06-01), Buckingham
patent: 2179828 (1939-11-01), Park
patent: 3382706 (1968-05-01), Fitzgerald et al.
patent: 4312217 (1982-01-01), Hartert
patent: 4811593 (1989-03-01), Miura et al.
patent: 4909068 (1990-03-01), Miura et al.
patent: 5596139 (1997-01-01), Miura et al.
patent: 5763766 (1998-06-01), Robinson
patent: 6194817 (2001-02-01), Yachi et al.
patent: 2099998 (1982-12-01), None
SU-396590A, Derwent Abstract.
Cygan Michael
Nixon & Vanderhye PC
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