GB2253640A - Tie cord for incandescent mantle - Google Patents
Tie cord for incandescent mantle Download PDFInfo
- Publication number
- GB2253640A GB2253640A GB9205214A GB9205214A GB2253640A GB 2253640 A GB2253640 A GB 2253640A GB 9205214 A GB9205214 A GB 9205214A GB 9205214 A GB9205214 A GB 9205214A GB 2253640 A GB2253640 A GB 2253640A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mantle
- tie cord
- tie
- cord according
- binder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21H—INCANDESCENT MANTLES; OTHER INCANDESCENT BODIES HEATED BY COMBUSTION
- F21H1/00—Incandescent mantles; Selection of imbibition liquids therefor
- F21H1/04—Suspension devices therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Glass Compositions (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
An incandescent mantle tie cord comprises a continuous filament core of a refractory fibre with a cellulosic outer sheath of staple fibres and a continuous filament yarn.
Description
Improvements in and relating to incandescent mantles
This invention relates to incandescent mantles for use in gas fired lanterns. A mantle for these purposes consists essentially of a bag which is secured over a gas supply jet, combustion taking place on the surface of the mantle, the structure of which is raised to white hot temperatures very rapidly.
Mantles are made from fibres which have good resistance to high temperatures, such as asbestos or glass. It will be noted that structural integrity is important, although it is normally accepted that after its first use, a mantle becomes extremely brittle and/or fragile. However, at the time of installation it is a loose, floppy bag and it is usual to provide a tie yarn in the form of a drawcord which can be used to secure the mantle in place.
The traditional material for the tie yarn was an asbestos based cord. Substitutes for asbestos have included glass fibre yarns with an outer layer of cotton. However, these have poor knot strength and poor performance at elevated temperatures.
A continuous filament glass fibre yarn with organic fibres such as acrylic, viscose and aramid staple fibres bonded to it in a generally parallel arrangement has also been tried, the organic component burning off in service to leave the glass core. However, knot strength is still a problem and aramid fibres are costly.
According to this invention an incandescent mantle tie cord comprises a continuous filament core of a refractory fibre with a cellulose outer sheath of staple fibres and a continuous filament yarn. Refractory fibre for present purposes means a fibre which will not ordinarily fuse together at the working temperature of a naturally aspirated liquified petroleum gas (LPG) flame. Working temperatures in the range of about 7500C to about 9000C are typical of such LPG flames. A particularly preferred refractory fibre is silica. The staple fibres and the continuous filament yarn are preferably of regenerated cellulose; they are applied to the refractory fibre yarn by winding and/or wrapping them onto the refractory fibre core, for example by use of the DREF spinning process. The cord may be treated with a binder to reduce hairiness.The binder may be an aqueous polyvinyl acetate ethylene oxide copolymer solution or dispersion.
Starch or acrylic polymer dispersions may also be used.
Viscose is a preferred regenerated cellulose material.
The tie cord of this invention can be coloured, for example by including a dyestuff in the binder, though it is also possible to dye the staple fibres. Colouring the tie cord facilitates its identification by a user.
It has been found that the tie cord of this invention has sufficient integrity to hold a mantle in place until its shape is effectively fixed by the heat developed in use, even though the regenerated cellulose carbonises to a very weak or even non-existent state after a fairly short time.
In order that the invention be better understood a preferred embodiment of it will now be described by way of example.
Example
A continuous filament core of two-ply 68 tex silica yarn was wrapped with 68 tex staple viscose (38 mm 1.7 dtex fibres) and a 122 tex continuous filament viscose strand to form a sheath. The wrapping was carried out on a DREF spinning machine. A polyvinyl acetate binder containing a dye was applied to the finished cord, which had the following composition by weight.
Silica 40%
Continuous filament viscose 32%
Staple viscose fibres 18%
Polyvinyl acetate binder 9%
Dye 1%
The cord thus produced had good handling properties and could be knotted without significant damage to the silica.
Claims (8)
1. A mantle tie cord comprising a continuous
multi-filament core of refractory fibre with a
cellulosic outer sheath of staple fibres and a
continuous filament yarn.
2. A mantle tie cord according to claim 1 wherein the
refractory fibre is silica.
3. A mantle tie cord according to claim 1 or claim 2
wherein the sheath comprises regenerated cellulose
fibres.
4. A mantle tie cord according to claim 3 wherein the
regenerated cellulose is viscose.
5. A mantle tie cord according to any of claims 1-4
further comprising a binder composition.
6. A mantle tie cord according to claim 5 wherein the
binder is a polyvinyl acetate composition, or starch,
or acrylic polymer dispersions.
7. A mantle tie cord according to claim 5 or claim 6
wherein the binder further comprises a dye.
8. A mantle tie cord substantially as hereinbefore
described with reference to and as illustrated by the
example.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB919105396A GB9105396D0 (en) | 1991-03-14 | 1991-03-14 | Improvements in and relating to incandescent mantles |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9205214D0 GB9205214D0 (en) | 1992-04-22 |
| GB2253640A true GB2253640A (en) | 1992-09-16 |
| GB2253640B GB2253640B (en) | 1994-08-24 |
Family
ID=10691560
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB919105396A Pending GB9105396D0 (en) | 1991-03-14 | 1991-03-14 | Improvements in and relating to incandescent mantles |
| GB9205214A Expired - Fee Related GB2253640B (en) | 1991-03-14 | 1992-03-11 | Improvements in and relating to incandescent mantles |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB919105396A Pending GB9105396D0 (en) | 1991-03-14 | 1991-03-14 | Improvements in and relating to incandescent mantles |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0575403B1 (en) |
| AT (1) | ATE130422T1 (en) |
| DE (1) | DE69206134T2 (en) |
| ES (1) | ES2079859T3 (en) |
| GB (2) | GB9105396D0 (en) |
| WO (1) | WO1992016788A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003018889A1 (en) * | 2001-08-24 | 2003-03-06 | Georg Issakides | Tie yarn for incandescent bodies and the use thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10159530A1 (en) * | 2001-12-05 | 2003-06-26 | Georg Issakides | Asbestos-free, silica binding thread for incandescent mantles of gas lamps, undergoes less than fifty percent diameter shrinkage when flamed |
| DE10140654A1 (en) * | 2001-08-24 | 2003-03-06 | Georg Issakides | Asbestos-free, silica binding thread for incandescent mantles of gas lamps, undergoes less than fifty percent diameter shrinkage when flamed |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4863799A (en) * | 1986-05-22 | 1989-09-05 | Hoechst Celanese Corp. | Sheath core spun organosilicon preceramic fibers and processes for production |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191318173A (en) * | 1913-08-09 | 1914-01-08 | Jacob Ignot Robin | Improvements in or relating to Incandescent Gas Mantles. |
| FR906247A (en) * | 1942-11-28 | 1945-12-27 | Auergesellschaft Ag | Tie wire for incandescent sleeves |
| FR2306957A1 (en) * | 1975-04-09 | 1976-11-05 | Frenzelit Asbestwerk | Alumina silicate and asbestos fibres-contg. insulation - also contg. metal or graphite fibres |
| US4381639A (en) * | 1980-06-19 | 1983-05-03 | Record Industrial Company | Sheath-core yarn for severe thermal protecting fabrics and method therefor |
-
1991
- 1991-03-14 GB GB919105396A patent/GB9105396D0/en active Pending
-
1992
- 1992-03-11 ES ES92906280T patent/ES2079859T3/en not_active Expired - Lifetime
- 1992-03-11 AT AT92906280T patent/ATE130422T1/en not_active IP Right Cessation
- 1992-03-11 WO PCT/GB1992/000432 patent/WO1992016788A1/en active IP Right Grant
- 1992-03-11 EP EP92906280A patent/EP0575403B1/en not_active Expired - Lifetime
- 1992-03-11 DE DE69206134T patent/DE69206134T2/en not_active Expired - Fee Related
- 1992-03-11 GB GB9205214A patent/GB2253640B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4863799A (en) * | 1986-05-22 | 1989-09-05 | Hoechst Celanese Corp. | Sheath core spun organosilicon preceramic fibers and processes for production |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003018889A1 (en) * | 2001-08-24 | 2003-03-06 | Georg Issakides | Tie yarn for incandescent bodies and the use thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9105396D0 (en) | 1991-05-01 |
| DE69206134T2 (en) | 1996-05-09 |
| GB2253640B (en) | 1994-08-24 |
| DE69206134D1 (en) | 1995-12-21 |
| GB9205214D0 (en) | 1992-04-22 |
| ES2079859T3 (en) | 1996-01-16 |
| EP0575403A1 (en) | 1993-12-29 |
| ATE130422T1 (en) | 1995-12-15 |
| EP0575403B1 (en) | 1995-11-15 |
| WO1992016788A1 (en) | 1992-10-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20100311 |