US3881851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machines for forming insulation for high frequency transmitting coaxial lines
Assignee: Societe Anonyme de Telecommunications SAT
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Filing: 1973-11-05
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Granted: 1975-05-06
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Expires: 1993-11-05
Abstract
Abstract A machine for forming between-conductor insulation in a coaxial electric conductor pair usable as a transmission line for very high frequency signals. The insulation is of the so-called ''''balloon'''' type, that is it consists of a thin thermoplastic tube constricted onto the central conductor at regularly spaced points by means of endless chains of small dies progressing at the same speed as the conductor and part of which press the tube against said conductor at said points. To prevent the possible appearance of periodic defects in the insulation, a small number of dies succeeding each other in the chain are exchanged at random time intervals for an equal number of similar dies taken from a reserve magazine, this being done without having to stop the operation of the machine. The dies of a chain are not mechanically interconnected and simply push each other in endless slides. A mechanism effecting substitution of a group of dies taken from the magazine for an equal number of dies taken in the chain during progression of the latter is described.
Inventors
- 👤 Jacques Allanic
- 👤 Philippe Beraudy
- 👤 Louis Guillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:34
CPC Classifications
H; H01; H01P; H01P11/00; H01P11/001; H01P11/005; G; G02; G02B; G02B5/00; H01B; H01B13/00; H01B13/06; H01B13/067; B; B29; B29C; B29C33/00; B29C33/30; B29C33/301; B29C49/00; B29C49/0015; B29C49/0027; B29C49/28; B29C49/30; B29C49/38; B29C49/40; B29L; B29L2023/00; B29L2023/22; B29L2023/225; B29L2031/00; B29L2031/34; B29L2031/3412; B29L2031/3462
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
179 words
In a machine for forming the between-conductor insulation of a coaxial conductor pair for the transmission of high frequency electric signals, means for extruding around said inner conductor a thin tube of thermoplastic material and for constricting said tube at periodically spaced points along said inner conductor, said means including a succession of substantially identical small dies forming at least one endless chain driven at a constant linear speed by endless screws, part of said dies being pressed against said tube up to contact thereof with said inner conductor, the improvement consisting in that the successive dies in each chain freely contact each other and are mechanically independent of each other and move in endless slides, and in that said machine includes in each chain an exchange mechanism for replacing at random time intervals a small number of succeeding dies by an equal number of similar dies taken out from a reserve magazine, the exchanging being effected without stopping the operation of the machine and being controlled by electric pulses generated at random times by a random pulse generator.
Claim 2
Dependent Claim
179 words
In a machine for forming the between-conductor insulation of a coaxial conductor pair for the transmission of high frequency electric signals, means for extruding around said inner conductor a thin tube of thermoplastic material and for constricting said tube at periodically spaced points along said inner conductor, said means including a succession of substantially identical small dies forming at least one endless chain driven at a constant linear speed by endless screws, part of said dies being pressed against said tube up to contact thereof with said inner conductor, the improvement consisting in that the successive dies in each chain freely contact each other and are mechanically independent of each other and move in endless slides, and in that said machine includes in each chain an exchange mechanism for replacing at random time intervals a small number of succeeding dies by an equal number of similar dies taken out from a reserve magazine, the exchanging being effected without stopping the operation of the machine and being controlled by electric pulses generated at random times by a random pulse generator.
Claim 3
Dependent Claim
84 words
In a machine as claimed in claim 1, the arrangement in which said exchange mechanism includes a barrel (15, FIG. 6) containing said reserve magazine and comprising a plurality of chambers each containing said small number of dies, said mechanism further including means (18) (19) (20) (21) controlled by said pulses from said generator (18a) for imparting said barrel (15) a translation motion and a rotation motion from a rest position, and means (30) for bringing back said barrel (15) to said rest position.
Claim 4
Dependent Claim
35 words
In a machine as claimed in claim 2, the arrangement in which said mechanism includes a set of levers (19), (26) actuated by an electromagnet (18) itself actuated by said pulses from said generator (18a).
Claim 5
Dependent Claim
66 words
In a machine as claimed in claim 1, the arrangement in which each of said chains is driven by an endless screw (5, FIG. 1), the axis of which is parallel to the motion direction of said inner conductor and the pitch of which is much smaller than the half-wavelength measured along the coaxial pair for the maximum frequency of the signals to be transmitted thereon.
Claim 6
Dependent Claim
37 words
In a machine as claimed in claim 1, including at least two endless chains of dies, the arrangement in which exchange mechanisms corresponding to different chains are respectively controlled by random electric pulses delivered by different sources.
Claim 7
Dependent Claim
36 words
In a machine as claimed in claim 1, the arrangement which comprises two endless chains of dies (4, 4, FIG. 5) and two mountings (G, H, FIG. 5) resting on a common baseplate (J. FIG. 5).
Claim 8
Dependent Claim
33 words
In a machine as claimed in claim 5, the arrangement which comprises three endless chains of dies and three mountings (P, Q, R, FIG. 7) resting on a common baseplate (S, FIG. 7).
Claim 9
Dependent Claim
34 words
In a machine as claimed in claim 1, the arrangement which comprises four endless chains of dies and four mountings (P1, P2, P3, P4, FIG. 8) resting on a common baseplate (S, FIG. 8).
References Cited (Backward Citations)
US2760228A
Cited
US3188690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |