US3720247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for measuring the length of oblong objects
Assignee: Ostbergs Fabriks AB
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Filing: 1971-11-01
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Granted: 1973-03-13
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Expires: 1991-11-01
Abstract
Abstract This invention relates to the measuring and cross-cutting of tree stems advanced by feed rolls. Upstream of the cross-cutting member two measuring rollers are pressed resiliently against the stem in diametrically opposed places. One of the measuring rollers is connected to a transmitter for signaling the stem length corresponding to the rotation of the measuring roller to a control unit. When a desired stem length has been achieved, the control unit stops the feed rolls and starts the movement of the cross-cutting member against the stem.
Inventors
- 👤 K Lindblom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:01
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/095; A01G23/097; B; B27; B27B; B27B1/00; B27B1/002; B27B31/00; Y; Y10; Y10T; Y10T83/00; Y10T83/525; Y10T83/54
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
151 words
An arrangement for measuring and cross-cutting tree stems advanced in their longitudinal directions by a feed unit, comprising a cross-cutting member for cutting the stem, two rollers mounted for engaging the stem at diametrically opposed positions immediately upstream of said cross-cutting member, support means for resiliently urging said rollers against the stem surface, a first transmitter connected to one of said rollers, and a control unit connected to the feed unit and to said cross-cutting member, the output of said transmitter being coupled to the input of the control unit for signaling to said control unit the stem length corresponding to the rotation of said one of said rollers, the control unit delivering, in response to the signal that the stem had reached a predetermined section length, an output signal to stop the feed unit, and an output signal to start the operation of said cross-cutting member for cutting the stem.
Claim 2
Dependent Claim
151 words
An arrangement for measuring and cross-cutting tree stems advanced in their longitudinal directions by a feed unit, comprising a cross-cutting member for cutting the stem, two rollers mounted for engaging the stem at diametrically opposed positions immediately upstream of said cross-cutting member, support means for resiliently urging said rollers against the stem surface, a first transmitter connected to one of said rollers, and a control unit connected to the feed unit and to said cross-cutting member, the output of said transmitter being coupled to the input of the control unit for signaling to said control unit the stem length corresponding to the rotation of said one of said rollers, the control unit delivering, in response to the signal that the stem had reached a predetermined section length, an output signal to stop the feed unit, and an output signal to start the operation of said cross-cutting member for cutting the stem.
Claim 3
Dependent Claim
151 words
An arrangement for measuring and cross-cutting tree stems advanced in their longitudinal directions by a feed unit, comprising a cross-cutting member for cutting the stem, two rollers mounted for engaging the stem at diametrically opposed positions immediately upstream of said cross-cutting member, support means for resiliently urging said rollers against the stem surface, a first transmitter connected to one of said rollers, and a control unit connected to the feed unit and to said cross-cutting member, the output of said transmitter being coupled to the input of the control unit for signaling to said control unit the stem length corresponding to the rotation of said one of said rollers, the control unit delivering, in response to the signal that the stem had reached a predetermined section length, an output signal to stop the feed unit, and an output signal to start the operation of said cross-cutting member for cutting the stem.
Claim 4
Dependent Claim
151 words
An arrangement for measuring and cross-cutting tree stems advanced in their longitudinal directions by a feed unit, comprising a cross-cutting member for cutting the stem, two rollers mounted for engaging the stem at diametrically opposed positions immediately upstream of said cross-cutting member, support means for resiliently urging said rollers against the stem surface, a first transmitter connected to one of said rollers, and a control unit connected to the feed unit and to said cross-cutting member, the output of said transmitter being coupled to the input of the control unit for signaling to said control unit the stem length corresponding to the rotation of said one of said rollers, the control unit delivering, in response to the signal that the stem had reached a predetermined section length, an output signal to stop the feed unit, and an output signal to start the operation of said cross-cutting member for cutting the stem.
Claim 5
Dependent Claim
106 words
An arrangement according to claim 1 and further comprising a device including means for continuously sensing the distance between the two rollers corresponding to the varying stem diameter, a second transmitter, the output of said device being connected to said second transmitter, an indicator connected to both the output of said first transmitter and the output of said second transmitter to indicate the volume of the stem section, said second transmitter also having an output connected to said control unit for signaling, in response to a stem diameter below a predetermined minimum, a forced stop of the feed unit and a start of said cross-cutting member.
Claim 6
Dependent Claim
56 words
An arrangement according to claim 1 wherein said first transmitter in response to continued rotation of the rollers caused by an unintended advance of the stem after the cross-cutting member has received an order from the control member to start operation, sends a signal to the control unit to stop the motion of the cross-cutting member.
Claim 7
Dependent Claim
58 words
An arrangement according to claim 1 wherein said support means comprises a pair of arms, each of the rollers being mounted at one end of one of said arms, the other end of each arm being pivotally mounted at a fixed point, and hydraulic means mounted between the two arms for resiliently urging the rollers against the stem.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |