US1909895A - Selecting device for droppers of lace machines - Google Patents
Selecting device for droppers of lace machines Download PDFInfo
- Publication number
- US1909895A US1909895A US551759A US55175931A US1909895A US 1909895 A US1909895 A US 1909895A US 551759 A US551759 A US 551759A US 55175931 A US55175931 A US 55175931A US 1909895 A US1909895 A US 1909895A
- Authority
- US
- United States
- Prior art keywords
- droppers
- selecting device
- dropper
- lace machines
- selecting
- 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.)
- Expired - Lifetime
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Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
- D04C5/00—Twist or bobbin-net lace-making machines
- D04C5/04—Net or lace curtain machines
Definitions
- My invention relates to lace machines in which the needle bars or pumps are controlled by the insertion of so-called droppers in front of a reciprocating driving member adapted to push said bars.
- the effective stroke thus varies according to the number and thickness of the inserted droppers.
- the selection of the droppers is generally directly effected by a jacquard mechanlsm. This arrangement is somewhat delicate, more particularly at high speeds, and the acquard cards are cumbersome.
- the selector mechanism is of the Verdol type and it acts by selecting depending counterweights whlch normally hold the droppers lowered against the action of light springs.
- Each needle bar 1 is pulled (against the action of springs not shown) by a driving bar or pump 2 loaded by a spring 3.
- This pump 2 is provided with two teeth 4 which are driven by two transverse driving bars 5 which reciprocate oppositely to each other.
- the droppers 6 to 12 are interposed between bars 5 and teeth 1, whereby the position of the latter at the end of each stroke is varied.
- Each dropper has a predetermined shape and thickness and it is suspended to a thin steel ribbon 13.
- the latter depends from avertical rod 14.- which is guided by two superposed guiding plates 15 and 16.
- a spring 17 acts on the head 18 of rod 14 so as to normally maintain the corresponding dropper disengaged from the corresponding tooth 4
- the dropper is thus normally inactive.
- Cylindrical counterweights '20 are arranged over heads 18. These counterweights are guided in plates 21 and 22 and they depend from the strings 23 of the Verdol mechanism 24 arranged over the machine. They areheavy enough to depress springs 17 and to lower the corresponding droppers when they'are themselves lowered by strings 23.
- the device works as follows:
- the 'Verdol mechanism 24 selects counter-J weights 20 and, by consequence, the droppers, a dropper being active whenever the corresponding string 23 is not pulled. It will be noted that the selection of the counterweights known dropper selecting arrangement, the
- selection with the device according to the invention may be effected less rapidly than with the known arrangements in which the droppers are directly selected by the mechanism since this selection must be efiected only when the droppers are freed. Faults resulting from a too rapid selection are thus" avoided.
- the device is preferably adjusted in such a manner that the selection is almost completed when the droppers are freed.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Of Fabric (AREA)
- Knitting Machines (AREA)
- Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
Description
May 16, 1933. M. A. R. RATELADE 1,909,895
SELECTING DEVICE FOR DROPPERS OF LACE MACHINES Filed July 18, 1931 IN \(ENTOR.
Mame A/v'rouve: Rama/v0 RATELADE.
ATTORNEY.- -0i Patented May 16, 1933 UNITED STATES ATEM? was:
MARIE ANTOINE. RAYMOND RATELADE, or LYON, FRANCE, nssrenon rois ooinrn ANONYME DES MECANIQUE vnnnon, or LYon, rnANcn, A complainton FRANCE SELECTING DEVICE FOR, DROPPERS OF LACE MACHINES Application filed July 18, 1931, Serial No. 551,759, and in France September 16, 1930.
My invention relates to lace machines in which the needle bars or pumps are controlled by the insertion of so-called droppers in front of a reciprocating driving member adapted to push said bars. The effective stroke thus varies according to the number and thickness of the inserted droppers.
The selection of the droppers is generally directly effected by a jacquard mechanlsm. This arrangement is somewhat delicate, more particularly at high speeds, and the acquard cards are cumbersome.
According to my invention, the selector mechanism is of the Verdol type and it acts by selecting depending counterweights whlch normally hold the droppers lowered against the action of light springs.
The annexed drawing diagrammatically shows an embodiment of the invention.
Each needle bar 1 is pulled (against the action of springs not shown) by a driving bar or pump 2 loaded by a spring 3. This pump 2 is provided with two teeth 4 which are driven by two transverse driving bars 5 which reciprocate oppositely to each other.
The droppers 6 to 12 are interposed between bars 5 and teeth 1, whereby the position of the latter at the end of each stroke is varied.
Each dropper has a predetermined shape and thickness and it is suspended to a thin steel ribbon 13. The latter depends from avertical rod 14.- which is guided by two superposed guiding plates 15 and 16. A spring 17 acts on the head 18 of rod 14 so as to normally maintain the corresponding dropper disengaged from the corresponding tooth 4 The dropper is thus normally inactive. Ex-
ception should be made for the first and thinnest dropper 6, provided with a tail 19 which is not disengaged at the uppermost position of the dropper. This dropper only acts by the difference of thickness between itsbody and its tail.
Cylindrical counterweights '20 are arranged over heads 18. These counterweights are guided in plates 21 and 22 and they depend from the strings 23 of the Verdol mechanism 24 arranged over the machine. They areheavy enough to depress springs 17 and to lower the corresponding droppers when they'are themselves lowered by strings 23.
The device works as follows:
The 'Verdol mechanism 24 selects counter-J weights 20 and, by consequence, the droppers, a dropper being active whenever the corresponding string 23 is not pulled. It will be noted that the selection of the counterweights known dropper selecting arrangement, the
operation of the selecting mechanism can begin before bar 5 has cleared the droppers Thus, for a given speed of the machine, the
selection with the device according to the invention may be effected less rapidly than with the known arrangements in which the droppers are directly selected by the mechanism since this selection must be efiected only when the droppers are freed. Faults resulting from a too rapid selection are thus" avoided.
In fact, the device is preferably adjusted in such a manner that the selection is almost completed when the droppers are freed.
Another advantage ofthe invention is that the upper and lower positions of the droppers are unaffected by slight variations in the length of the strings. The lower position,
particularly, results from the complete depression of the corresponding spring 17 under the action of counterweight 20 and, if the string 23 is adjusted so as to be then somewhat slack, it is of evidence that the counterweight is neither lowered, nor lifted should the string be slightly lengthened or shortened.
On the other end, the Verdol papers are considerably less cumbersome than the jacquard cards. 7
I claim: I
1. In a lace machine having needle bars controlled by the insertion of droppers, means to insure the selection of the latter, comprising members to which the-droppers are suspended; spring means adapted to malntain said members at a predetermined height; a
selecting mechanism; and counterweights directly selected by said mechanism, said counterweights being adapted at their lower position, to depress said members against the action of said spring means so as to lower said droppers.
2. A selecting arrangement as claimed in claim 1, wherein the selecting mechanism is of the Verdol type.
In testimony whereof I afiix mysignature.
' MARIE ANTOINE RAYMOND RATELADE.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1909895X | 1930-09-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1909895A true US1909895A (en) | 1933-05-16 |
Family
ID=9682154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US551759A Expired - Lifetime US1909895A (en) | 1930-09-16 | 1931-07-18 | Selecting device for droppers of lace machines |
Country Status (1)
Country | Link |
---|---|
US (1) | US1909895A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2896497A (en) * | 1954-03-25 | 1959-07-28 | Jardine John Ltd | Jacquard machines |
-
1931
- 1931-07-18 US US551759A patent/US1909895A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2896497A (en) * | 1954-03-25 | 1959-07-28 | Jardine John Ltd | Jacquard machines |
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