Patent US4393902A successfully refreshed from Google Patents.
US4393902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission for the shed-forming mechanism of a loom
Assignee: Oerlikon Textile GmbH and Co KG
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Filing: 1980-09-11
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Granted: 1983-07-19
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Expires: 2000-09-11
Abstract
Abstract A transmission for the shedding mechanism (dobby) of a loom in order to produce a non-uniform drive from a uniform drive, having a drive shaft and a driven shaft aligned therewith, said shafts being mounted in a transmission housing. In order to simplify the construction, a rotor is arranged fixed for rotation on the drive shaft, the rotor bearing at least one gear segment which is swingably supported on an eccentric shaft and has two cam rollers arranged in different planes, the gear segment being in engagement with a driven pinion arranged fixed for rotation on the driven shaft and the cam rollers cooperating in force-actuated and/or form-locked manner with two cams fastened in different planes to the transmission housing, the asymmetry of which cams producing a relative movement per revolution between the drive shaft and the driven shaft. The relative movement per revolution can be adjusted by replacing the two cams. The rotor can also be formed with two arms and carry two gear segments, the cam rollers of which cooperate with the two cams.
Inventors
- 👤 Josef Brock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:26
CPC Classifications
D; D03; D03C; D03C1/00; D03C1/14; D03C1/148; D03C1/144
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
153 words
In a transmission for a shedding mechanism (dobby) of a loom for the production of a nonuniform drive from a uniform drive comprising a drive shaft and a driven shaft aligned therewith, said shafts being supported in a transmission housing, the improvement comprising a rotor arranged fixed for rotation on said drive shaft, at least one gear segment, an eccentric shaft swingably supports said gear segment on said rotor, each of said at least one gear segment has two cam rollers arranged in different planes, a driven pinion arranged fixed for rotation on said driven shaft engages said gear segment, two cams fastened in said different planes respectively to the transmission housing, said cam rollers cooperate with said cams in form-locked manner, said cams are asymmetrically formed such that an adjustable relative movement per revolution between the drive shaft and the driven shaft is produced dependent on the form of said two cams.
Claim 2
Dependent Claim
153 words
In a transmission for a shedding mechanism (dobby) of a loom for the production of a nonuniform drive from a uniform drive comprising a drive shaft and a driven shaft aligned therewith, said shafts being supported in a transmission housing, the improvement comprising a rotor arranged fixed for rotation on said drive shaft, at least one gear segment, an eccentric shaft swingably supports said gear segment on said rotor, each of said at least one gear segment has two cam rollers arranged in different planes, a driven pinion arranged fixed for rotation on said driven shaft engages said gear segment, two cams fastened in said different planes respectively to the transmission housing, said cam rollers cooperate with said cams in form-locked manner, said cams are asymmetrically formed such that an adjustable relative movement per revolution between the drive shaft and the driven shaft is produced dependent on the form of said two cams.
Claim 3
Dependent Claim
46 words
The transmission according to claim 1, wherein said two cams are shaped such that said driven shaft passes, in a main direction of rotation, a predetermined angular position, rotates in reverse back to said position and then continues in said main direction of rotation per revolution.
Claim 4
Dependent Claim
65 words
The transmission according to claim 1, wherein said two cams are releasably fastened on the transmission housing, said relative movement per revolution between the drive shaft and the driven shaft being adjustable by replacing said two cams with a different set of the two cams having a different form to provide a different relative movement per revolution between the drive shaft and the driven shaft.
Claim 5
Dependent Claim
70 words
The transmission according to claim 1, wherein, said shedding mechanism includes movement members of at least one dobby, a crank arm is operatively mechanically connected to said movement members, an eccentric disc is mounted on said driven shaft, said crank arm is mounted on said eccentric disc, and a wedge is radially displaceably mounted on said eccentric disc and said driven shaft for connection and disconnection, respectively, from the latter.
Claim 6
Dependent Claim
50 words
The transmission according to claim 4, further comprising a plurality of said movement members and a plurality of said dobbies associated with a plurality of said crank arm, said eccentric discs and said wedges, respectively, said eccentric discs and said wedges are arranged adjacent each other on said driven shaft.
Claim 7
Dependent Claim
47 words
The transmission according to claim 1, wherein said rotor is formed with two arms, two of said gear segments, each of said two arms carries one of said two gear segments, respectively, said cam rollers of each of said two gear segments cooperate with said two cams.
Claim 8
Dependent Claim
16 words
The transmission according to claim 6, wherein said two arms of said rotor are 180° apart.
Claim 9
Dependent Claim
49 words
The transmission according to claim 7, wherein said two cams are disposed about said driven shaft closely between said pinion, said gear segments and said transmission housing, and said rotor is disposed adjacent a side of said pinion and said gear segments opposite from that of said two cams.
Claim 10
Dependent Claim
17 words
The transmission according to claim 8, wherein said cam rollers engage peripheral surfaces of said cams, respectively.
Claim 11
Dependent Claim
27 words
The transmission according to claim 6, wherein said two gear segments and said cam rollers are disposed symmetrically about a coaxial line of both of said shafts.
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) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |