Patent US3751977A successfully refreshed from Google Patents.
US3751977A
Expired / Lapsed
US
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Material analyzing apparatus
Assignee: CHEM INSTR CORP
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Filing: 1972-04-19
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Granted: 1973-08-14
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Expires: 1992-04-19
Abstract
Abstract An analyzing structure for determining properties such as elastic shear modulus and mechanical hysteresis of a material. A pair of mutually spaced holders hold the sample in such a way that the holders are interconnected by the sample, and these holders are in turn carried by driver and driven supports. A drive sets the driver support into vibratory motion so that the latter is transmitted through the sample to the driven support. By detecting the manner in which the driver and driven supports vibrate it is possible to determine properties of the sample. The sample is tested by cyclically generating substantially pure shear forces in the sample, with the power required to sustain the vibrations of the sample at a constant level being measured to determine the damping of the sample and the frequency of vibration being measured to determine the modulus of the sample.
Inventors
- 👤 R Schilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:14
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/12; G01N29/043; G01N3/00; G01N3/32; G01N3/38; G01N2203/00; G01N2203/0014; G01N2203/0025; G01N2203/0058; G01N2203/0092; G01N2203/02; G01N2203/022; G01N2203/0222; G01N2203/06; G01N2203/067; G01N2203/0676; G01N2203/0688
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
196 words
In an analyzer, a pair of mutually spaced holding means for holding a sample which is to be analyzed with said sample extending between and interconnecting said pair of holding means, driver support means carrying one of said holding means to support the latter for vibratory movement and driven support means carrying the other of said holding means to support the latter also for vibratory movement, drive means operatively connected with said driver support means for setting the latter into vibratory motion which is transmitted through said one holding means to said sample and from the latter to said other holding means to vibrate the latter and said driven support means therewith, whereby said driver support means and said one holding means, on the one hand, and said driven support means and said otheR holding means, on the other hand, form driver and driven units which are set into vibratory motion when said drive means operates with a vibratory motion being transmitted to said driven unit through said sample, and detecting means coacting with at least one of said units for responding to vibratory motion thereof for determining properties of the sample which is under test.
Claim 2
Dependent Claim
196 words
In an analyzer, a pair of mutually spaced holding means for holding a sample which is to be analyzed with said sample extending between and interconnecting said pair of holding means, driver support means carrying one of said holding means to support the latter for vibratory movement and driven support means carrying the other of said holding means to support the latter also for vibratory movement, drive means operatively connected with said driver support means for setting the latter into vibratory motion which is transmitted through said one holding means to said sample and from the latter to said other holding means to vibrate the latter and said driven support means therewith, whereby said driver support means and said one holding means, on the one hand, and said driven support means and said otheR holding means, on the other hand, form driver and driven units which are set into vibratory motion when said drive means operates with a vibratory motion being transmitted to said driven unit through said sample, and detecting means coacting with at least one of said units for responding to vibratory motion thereof for determining properties of the sample which is under test.
Claim 3
Dependent Claim
19 words
The combination of claim 1 and wherein said units operate on said sample to cyclically generate shear stresses therein.
Claim 4
Dependent Claim
19 words
The combination of claim 1 and wherein a temperature-regulating means coacts with said sample for regulating the temperature thereof.
Claim 5
Dependent Claim
32 words
The combination of claim 1 and wherein a second detecting means coacts with the other said units for responding to vibratory motion thereof for providing additional information with respect to the sample.
Claim 6
Dependent Claim
37 words
The combination of claim 4 and wherein a feedback means is operatively connected between said second detecting means and drive means for controlling the latter to maintain said driver unit in a state of resonant vibratory movement.
Claim 7
Dependent Claim
56 words
The combination of claim 1 and wherein said driver and driven support means respectively have the construction of a pair of identical upright springy tines, said pair of holding means respectively having the construction of a pair of identical clamps respectively carried by said tines and interconnected by said sample which is clamped by said clamps.
Claim 8
Dependent Claim
32 words
The combination of claim 6 and wherein a base is common to and carries said tines and is of sufficient mass and stiffness to prevent flexure of said base during vibratory movement.
Claim 9
Dependent Claim
95 words
The combination of claim 1 and wherein said detecting means includes a light-chopping means carried by said driven support means for movement therewith for modulating a light beam with a frequency determined by the vibratory motion of said driven support means, light-source means for directing toward said light-chopping means a light beam to be modulated thereby, and photosensitive means situated at the side of said light-chopping means opposite from said light source for responding to the modulation of the light beam by said light-chopping means to detect the vibratory motion of said driven support means.
Claim 10
Dependent Claim
29 words
The combination of claim 8 and wherein a second detecting means identical with said first-mentioned detecting means coacts with said driver support means for detecting the vibratory motion thereof.
Claim 11
Dependent Claim
31 words
The combination of claim 1 and wherein said detecting means forms the only detecting means of the analyzer, whereby there is no detecting means coacting with the other of said units.
Claim 12
Dependent Claim
13 words
The combination of claim 10 wherein said one unit is the driver unit.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |