Double Action DODDY.
Year: 1899

page_text: Date of Application, 2nd Jan., 1899-Accepted, 5th Aug., 1899
Double Action DODDY.
I, FRANZ LOUIS WÄCHTLER, of Dülken, Rhineland, Works Manager, do hereby
declaro my said invention to be as follows:-
-
The present invention relates to an improvement in the well known Smith
Hattersley dobby. This machine has the disadvantage that the lags of the card
fitted with pegs at times produce derangement of the machinery, because the
pegs on the slightest displacement of the cards, break off or are wrenched out
of the lags and consequently defects in the goods result. The improvement consists
of the following viz. that the hooks are picked up by means of perforated and
unperforated cards and the wooden pegs are rendered unnecessary. The lags
hitherto used as well as the ordinary cardboard can be used for this machine, the
chief thing being that the lags must always expose only as many perforations as
an ordinary cardboard for the same purpose and it is quite sufficient for the
superfluous holes to be only stopped up.
Figure 1 shows a front elevation of the complete dobby seen from the position
of the weaver.
Figure 2 is a side elevation of the same.
Figure 3 is the arrangement for lifting the lower hooks.
Figure 4 the arrangement for the upper hooks.
The bent levers 2 are rotably arranged on the axle 1 fixed in the frame
work on the ends of which levers the hooks 3 rest. Between the lever arms 2
a needle lever 4 is introduced which for the sake of clearness is omitted in
Figure 3 but shewn in Figure 4.
On the levers 4 in guides 5 and 6 the needles 7 are placed by which the upper
hooks 8 are worked. The levers 2 and 4 have a tendency to revolve in the
direction of the arrow 9 accordingly they have as an abutment the needle guide 10
fixed in the framework. In this needle guide as also in the needle guide 11
ihe needles 12 are arranged so as to slide and as soon as an unperforated card 13
on the card rollers 14 is presented the needles 12 slide in the direction of
the arrow 15 and the levers 2 and 4 as also the hooks 3 reach the position shewn
in dotted lines. The hooks 8 on the other hand remain in their lowest position
because the needles 7 are not long enough to lift them: The hooks 8 are raised
from the dotted position by a lifting bar 16 (Figure 4) into the position shewn
by the dots and dashes.
The lifting bar 16 as shewn in Figures 1 and 2 together with the connecting
rod 19 and the two levers 17 and 18 form a closed frame which is in connection
with the cranks 21 and 22 on the axle 20.
The position of the lever 23 corresponds to the position of the lifting bar
frame (Figure 1) since the pawl 25 on the axle 24 has rotated the pawl 26 on the
axle 20 in the direction on the arrow 27 and has thereby shifted the lifting bar
frame from the dotted position into the indicated position. The consequence of
this is that the lifting bar 16 is depressed so far that the levers 4 on the axle 1 and
the noses beneath can be freely moved and are no longer impeded by the lifting
bar 16.

page_text: When the lifting bar lever 23 is moved in the direction of the arrow 28 the
lifting bar frame is again drawn back into the dotted position by the spring 29
which connects the lifting bar frame with the framework of the machine where-
upon the lifting bar frame has its abutment partly against the needle frame 10
and partly on the projection marked on the levers 21 and 22. The already
known card cylinder 14 is by means of the cylinder frame 30 and bolts 31
arranged so as to oscillate and is by means of a separate rod 32 from the main
shaft of the loom in connection with the axle 33 and levers 34 35 and connecting
rod 36, continually moved away from the needle frame 11 and drawn back again
by the spring 37. When the cylinder is moved away the lifting bar frame is at
the same time pushed to such an extent by the crank 40 on the axle 33 and the
slotted connecting rod 37 that the lifting bar is pushed from position I Figure 4
into position III. When 'the axle 24 is moved in the opposite direction to the
arrow 28, as soon as it has reached its limit, the depression of the lifting bar 16
is brought about as previously described and that to such an extent that it is
pushed from position I into position II. When this is effected the levers 2 and 4
are picked up because, by reason of the pressure of the cylinder 14. provided with
cards 13 on the needle guide 11 the needles 12 with the corresponding levers 2
and 4 are pushed towards the left according to the special character of the card.
By this sliding motion the hooks 3 are either raised by means of the levers 2
or allowed to remain and lifted up by the lifting bar 38. The levers 4 on the
other hand which are in the dotted position (Figure 4) are now held by the lifting
bar 16 since the axle 24 instantly moves back in the direction of the arrow 28 and
the consequence is that the lifting bar 16 is brought from position II into,
position I. Now the cylinder is also removed from the needle guide 11 and
as soon as it and the lifting bar 39 have reached the dotted position in Figure 4
the levers 4 which have up to now been held by their noses by the lifting bar 16
are brought from the dotted position into the dot and dash position because the
lifting bar 16 has changed its position from to III and remoyed the hooks 8
which are to be raised from the lifting bar 39.
The hooks 3 and 8 are operated by a perforated caril the perforations of which
cause the said hooks to engage with the lifting bars 38 and 39 thereby causing.
the front crank lever 41 together with the rocking lever 42 to rise.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:
1
CLAIM. ✓
A double action dobby characterised by the rise and fall of the shafts being
effected by means of perforated and unperforated cards in such a way that the
lower row of hooks 3 is worked direct while the upper row of hooks 8 is lifted up
and put into position by means of a lifting frame (16).
Dated this 21st day of December 1898
FRANZ LOUIS WACHTLER.
By George Barker,.
Fellow of The Chartered Institute of Patent. Agents,
Agent for Applicant
77, Colmore Row, Birmingham.