US3854330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring mass density variations in a staple fiber sliver on spinning preparatory machines
Assignee: Maschinenfabrik Rieter AG
•
Filing: 1973-04-13
•
Granted: 1974-12-17
•
Expires: 1993-04-13
Abstract
Abstract Apparatus for measuring mass density variations in a staple fiber sliver on spinning preparatory machines, comprising a sliver funnel having a throughput duct which converges in the direction of material flow. The sliver funnel comprises centrally symmetrical members which are radially elastically deflectable and which condense from all sides the fiber sliver passing therethrough. One or a number of highly sensitive detectors for detecting variations of the fiber mass are associated with such members of the sliver funnel and each detector transmits a signal to an amplifier corresponding to the deflection of the deflectable members.
Inventors
- 👤 R Wildbolz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:25
CPC Classifications
D; D01; D01H; D01H13/00; D01H13/14; D01H13/22
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
131 words
An apparatus for measuring mass density variations in a staple fiber sliver on spinning preparatory machines, comprising a sliver funnel having a throughput duct converging in the direction of flow of the fiber material, said sliver funnel embodying substantially centrally symmetrical members which are radially elastically deflectable and serving to condense at all sides the throughpassing fiber sliver, amplifier means, at least one detector operatively connected with said amplifier means and with said deflectable members for transmitting a signal to said amplifier means which corresponds to the deflection of at least one of said deflectable members, said detector comprising an air outlet opening arranged in such close vicinity to an associated one of said deflectable members that said associated member acts as an impact plate for the thus formed pneumatic micrometer.
Claim 2
Independent Claim
131 words
An apparatus for measuring mass density variations in a staple fiber sliver on spinning preparatory machines, comprising a sliver funnel having a throughput duct converging in the direction of flow of the fiber material, said sliver funnel embodying substantially centrally symmetrical members which are radially elastically deflectable and serving to condense at all sides the throughpassing fiber sliver, amplifier means, at least one detector operatively connected with said amplifier means and with said deflectable members for transmitting a signal to said amplifier means which corresponds to the deflection of at least one of said deflectable members, said detector comprising an air outlet opening arranged in such close vicinity to an associated one of said deflectable members that said associated member acts as an impact plate for the thus formed pneumatic micrometer.
Claim 3
Dependent Claim
18 words
The apparatus as defined in claim 1, wherein each deflectable member has associated therewith at least one detector.
Claim 4
Dependent Claim
16 words
The apparatus as defined in claim 2, wherein each of said detectors possesses high detection sensitivity.
Claim 5
Dependent Claim
31 words
The apparatus as defined in claim 1, wherein each deflectable member is provided witH an individual detector containing an air outlet nozzle, and said air outlet nozzles being connected in parallel.
Claim 6
Dependent Claim
26 words
The apparatus as defined in claim 1, wherein said deflectable members constitute integral components of the sliver funnel and are formed of an elastically flexible material.
Claim 7
Dependent Claim
28 words
The apparatus as defined in claim 5, wherein said elastically deflectable members incorporate slot means extending in a median plane over a major portion of the sliver funnel.
Claim 8
Dependent Claim
44 words
The apparatus as defined in claim 5, wherein said elastically deflectable members possess slot means extending in a median plane over a major portion of the sliver funnel, and the reduction of the cross-section is effected by branch slots extending from said slot means.
Claim 9
Dependent Claim
22 words
The apparatus as defined in claim 4, wherein said air outlet nozzles are arranged at diametrically opposed locations of the sliver funnel.
Claim 10
Dependent Claim
39 words
The apparatus as defined in claim 1, further including a vessel supplied by a pressure source via a throttle valve, said air outlet nozzle being operatively connected with said vessel, and said vessel being connected with said amplifier means.
Claim 11
Independent Claim
105 words
An apparatus for measuring mass density variations in a staple fiber sliver on spinning preparatory machines, comprising a sliver funnel having a throughput duct converging in the direction of flow of the fiber material, said sliver funnel embodying substantially centrally symmetrical members which are radially elastically deflectable and serving to condense at all sides the throughpassing fiber sliver, amplifier means, at least one detector operatively associated with said amplifier means and with said deflectable members for transmitting a signal to said amplifier means which corresponds to the deflection of at least one of said deflectable members, said deflectable members containing a zone of reduced stiffness.
Claim 12
Independent Claim
105 words
An apparatus for measuring mass density variations in a staple fiber sliver on spinning preparatory machines, comprising a sliver funnel having a throughput duct converging in the direction of flow of the fiber material, said sliver funnel embodying substantially centrally symmetrical members which are radially elastically deflectable and serving to condense at all sides the throughpassing fiber sliver, amplifier means, at least one detector operatively associated with said amplifier means and with said deflectable members for transmitting a signal to said amplifier means which corresponds to the deflection of at least one of said deflectable members, said deflectable members containing a zone of reduced stiffness.
Claim 13
Dependent Claim
28 words
The apparatus as defined in claim 10, wherein said zone of reduced stiffness is formed by a reduction in the cross-section of the wall of the sliver funnel.
Claim 14
Dependent Claim
41 words
The apparatus as defined in claim 11, wherein each deflectable member contains a detector having an air outlet nozzle, and wherein said air outlet nozzles, viewed in the direction of fiber material transport, are arranged after the zone of reduced stiffness.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |