Improvements in or applicable to the Clips of Stentering and the like Machines.
Year: 1898

page_text: Improvements in or applicable to the Clips of Stentering
and the like Machines.
We, JOHN DANIA TOMLINSON, of Soho Works, Rochdale, Engineer, JAMES
CHADWICK, of Belfield Works, Rochdale Calico Printer, and JOSHUA PORTER, of
Soho Works, Rochdale, Works Manager, do hereby declare the nature of this
invention to be as follows:-
-
Our said invention relates to improvements in or applicable to the clips used
in stentering machines and other like machines for stretching or holding cloth
in a distended state.
Stentering clips or grips as heretofore constructed are provided with a hinged
jaw the acting part of which is set at such an angle as to grip the margin of the
cloth against a plate. A swinging relieving catch is commonly employed in com-
bination with such jaws to relieve the grip of the jaw at the first entry of the
clotn.
As heretofore constructed such jaws and relieving catches have their axes or
fulcrums mounted in a rigid projection or bracket which carries or is combined
with the lower jaw or plate. Such a construction as described presents difficulties
in the way of inserting or removing cloth when the jaws or the chain carrying
them travel in a vertical direction or along a curved path as for example on. the
periphery of a pulley or wheel.
According to our said invention the bracket or projection which carries the
hinged jaw or the hinged jaw and the relieving catch is hinged to that part which
forms or carries the lower jaw or plate. Such a device we refer to herein as a
swinging jaw bracket.
In applying our said invention to a stretching machine in which the cloth is
caused to pass round two pulleys or wheels revolving in planes set at an angle to
each other (so as to cause a stretch while passing half round) means such as cams
or guide rails are provided for throwing back the swinging jaw bracket in order
to release the cloth and for throwing it forward to receive the cloth at its place of
entry.
1007

page_text: Improvements in or applicable to the Clips of Stentering
and the like Machines.
We, JOHN DANIA TOMLINSON, of Soho Works, Rochdale, Engineer, JAMES
CHADWICK, of Belfield Works, Rochdale Calico Printer, and JOSHUA PORTER, of
Solo Works, Rochdale, Works Manager, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
Our said invention relates to improvements in or applicable to the clips used
in stentering machines and other like machines for stretching or holding cloth
in a distended state.
Stentering clips or grips as heretofore constructed are provided with a hinged
jaw the acting part of which is set at such an angle as to grip the margin of the
cloth against a plate. A swinging relieving catch is commonly employed in com-
bination with such jaws to relieve the grip of the jaw at the first entry of the
cloth.
As heretofore constructed such jaws and relieving catches have their axes or
fuleruns mounted in a rigid projection or bracket which carries or is combined
with the lower jaw or plate. Such a construction as described presents difficulties
in the way of inserting or removing cloth when the jaws or the chain carrying
them travel in a vertical direction or along a curved path as for example on the
periphery of a pulley or wheel.
According to our said invention the bracket or projection which carries the
hinged jaw or the hinged jaw and the relieving catch is hinged to that part which
forms or carries the lower jaw or plate. Such a device we refer to herein as a
swinging jaw bracket.
In applying our said invention to a stretching machine in which the cloth is
caused to pass round two pulleys or wheels revolving in planes set at an angle to
each other (so as to cause a stretch while passing half round) means such as cams
or guide rails are provided for throwing back the swinging jaw bracket in order
to release the cloth and for throwing it forward to receive the cloth at its place of
entry.
In the accompanying drawings to which reference is herein made we show
the details of our said invention and its application to a circular stretching
machine.
Figures 1, 2 and 3 are enlarged elevations of a clip and its hinged jaw bracket
in different positions.
Figure 4 is a sectional elevation of a circular stretching machine as seen from
the inside.
Referring first to Figure 1 a is the bracket or projection in which are mounted
the jaw and relieving catch of the usual well known construction which in combina
tion with the lower jaw b seize and hold the selvedge of the fabric to be stretched.
According to our said invention the bracket a is hinged at c to the lower jaw b.
In order to render the hinged bracket a temporarily rigid in order to hold the
cloth when required a bearing must be provided in order to prevent the upper
jaw rising. Such a bearing is provided by a cam rail d. When the clip passes
the cam rail a prolongation a¹ of the bracket a bears against the cam rail and
thus the clip is temporarily locked and its opening prevented. When the clip has
passed by the cam rail the hinged bracket is free to swing upwards (Fig. 2) and
the cloth can be withdrawn.

page_text: In a straight stentering machine such a cam rail will be straight and parallel
to the path of the chain. In this case the raised or projecting part of the cam
rail will present itself to the chain in that part of its course where the clips have
to be locked.
The advantages of clips constructed in this manner are however more particu-
larly apparent in the case where the chain travels in a vertical or inclined or
circular path. Fig. 4 illustrates the application of our said invention to a circular
stretching machine of which Fig. 1 is an elevation partly in section on a
plane x-x. In this case the clips are mounted at each side of the machine on
the periphery of revolving wheels (Fig. 1) which are set obliquely to each other
on the shaft f so that at the end y the clips on the two sides of the machine are
nearer to each other where the oth enters than at g' where the cloth leaves.
Consequently the cloth is stretched between these two points. The cam rails d
are parallel to their respective clip carrying wheels and extend from
to g¹.
(Although only a few clips are shown in Fig. 4 it is to be understood that they
form a complete circle). When a clip is at the bottom as at it hangs as shown
in Fig. 3 (which is an elevation on a plane y-y of Fig. 4). As it travels towards y
the prolongation a' meets the cam rail & which closes the upper jaw on to the
cloth which comes between it and the lower jaw. The clip remains locked until
it reaches whereupon the pressure of the upper jaw on the cloth is relaxed and
the clip is freed from the cloth which travels onwards while the clip continues
its circular course.
The cloth passes from the delivery roller k to the taking up roller in the direc-
tion indicated by a chain dotted line and arrows. The usual means employed in
stretching machines are employed for controlling the speed the amount of stretch
stopping and starting the machine and the like.
We make no general claim to clips having jaws and relieving catches of the
type shown nor to stretching machines in which the stretch is obtained by the
action of obliquely set wheels between which the cloth is distended nor is our
said invention limited to the particular constructions shown in the accompanying
drawings as illustrations of the application of our said invention.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. In a stentering or stretching machine the combination of a clip the upper
jaw of which is mounted in a hinged bracket and a cam rail or resistance for
temporarily locking the clip substantially as and for the purpose set forth and
shown.
2. In a circular stretching machine the combination of two sets or circles of
revolving clips set obliquely to each other and having their upper jaws mounted
in brackets hinged to the lower or fixed jaws or plates and a circular cam or
resistance rail for temporarily locking the clips while the cloth is being stretched
substantially as and for the purpose set forth and shown.
Dated this 27th day of September 1898.
E. T. WHITELOW, A.M. Inst. C.E.,
70, Deansgate, Manchester, Agent for the Applicants.