improvements in Doddies for Looms for weaving.
Year: 1898

page_text: improvements in Doddies for Looms for weaving.
We, ISAAC SMITH, Junior, of Saltaire Mills, Saltaire, near Bradford, in the
County of York, Spinner and Manufacturer, and JoHN HERBERT HARRISON,
of the same place, Overlooker, do hereby declare the nature of this invention
to be as follows:
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This invention relates to certain improvements in the-class of dobbies known
as "Hattersley's" suitable for coating looms, and has for its object, the pre-
vention of the rebounding of the levers or feelers, when they drop into position
after being operated by the lags of the pattern surface.
The levers or feelers as hitherto constructed and supported are liable to
rebound, thus making a wrong lift, or in other words a wrong pattern in the
piece that is being woven; the mistakes so made involving a considerable
amount of work upon the part of the "menders" in making good the defects,
thus adding expense to the cloth.
We accomplish our object by placing a cross bar preferably of wood from
side to side of the framework of the dobby, and into the middle of this cross
bar we insert a piece of leather, sufficiently deep into the wood to secure the
same. This leather projects above the cross bar for its entire length between
the frame sides of the dobby, and is so placed that, the round part of the levurs
or feelers, when liberated, rest upon the same without any rebound whatever,
thus ensuring not only a perfect pattern, but we are also enabled to run the
dobby quite up to the possible speed of the loom as at present constructed.
Doted this 5th day of Fahruary 1898
We, ISAAC SMITH, Junior, of Saltaire Mills, Saltaire, near Bradford, in the
County of York, Spinner and Manufacturer, and Jonx HERBERT HARRISON,
of the same place, Overlooker, do hereby declare the nature of this invention
11

page_text: and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
This invention relates to certain improvements in the class of dobbies known
us "Hattersley's" such as are suitable for coating looms, and has for its object,
the prevention of the rebounding of the levers or feelers when they drop into
their normal position after being operated by the pins secured to the lags of
the pattern surface.
With the above class of dobbies as-at-present constructed, the levers or feelers
after being raised by the respective pins forming the pattern surface are liable
to rebound, thus at times allowing one of the top or bottom catches to come
into contact with one of the draw bars, thereby causing a wrong pick to be made,
or in other words, a defect in the pattern of the piece that is being woven; the
defect in the pattern so made involving a considerable amount of work upon
the part of the "menders" in making good such defects, thus adding expense
to the cloth.
In describing our invention in detail, reference is made to the accompanying
drawing, in which Fig. 1 represents an elevation of a portion of our improved
support, and
Fig. 2 a diagramatic view of a lever or feeler with our improved support for
same shown in position, also the catches and other levers working in conjune-
tion with the lever or feeler and pattern surface all detached from the dobby
frames.
The framework of the dobby, levers or feelers A, catches B and C, upright
needles D), levers E and F, pattern lag cylinder G and lags H, and draw bars J,
are all arranged, mounted in the framework of the dobby, and operated in the
manner as hitherto, to which we make no claim as forming part of this in-
vention.
In carrying out our invention, we place a cross har K, preferably of wood
extending from one side frame to the other of the dobby, and support the said
cross bar in any convenient manner. .
Upon the cross bar K we secure a piece of leather L or the like, the entire
length of the cross bar between the side frames of the dobby; the cross bar K
being so placed that, the circular ends A¹ of the levers or feelers A when in
their normal position, rest upon the same; and between each lever A, we prefer-
ably secure to the cross bar K a guide needle N for keeping the levers or
feelers A out of contact with each other.
The lag cylinder G is moved intermittently and quickly between each pick
of the loom shuttle in the ordinary manner, and when a pattern pin M in one
of the lags H raises a lever or feeler A to the position shown by dotted lines,
the upright needle D, allows the catches B and C to come into position for
being operated by the draw bars J, thus operating the ordinary levers E and F
accordingly, and before the next pick of the loom shuttle, the lag cylinder G
is again operated, thus removing the supporting pattern surface pin M quickly,
thereby allowing the lever or feeler A to fall suddenly, which, on being arrested
by the cushion of leather L placed in the position shown, the tendency for the
levers or feelers A to rebound is obviated, instead of rebounding as is the case
when the support is formed and placed in the position as hitherto.
By arranging the support of the levers or feelers A in the manner that they
do not rebound when allowed to drop by a pattern pin M, we have found that
the dobby can be run quite up to the possible speed at which the picking of the
loom shuttle can be accomplished, thus increasing the production of the loom,
whereas when the levers or feelers A are allowed to drop upon the support as
hitherto constructed and placed, the loom could not be run equal to its picking
capacity, because the speed at which it was found necessary to run the dobby
in order to reduce the rebounding of the levers or fallers A, controlled the speed
at which the loom could be run.

page_text: Having now particularly described and ascertained the nature of our inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is-
-
!
A dobby with which is combined a cross bar K faced with leather L or the
like placed in a position for arresting the fall of the levers or feelers A and
preventing the rebounding of the same.
Dated this 5th day of November 1898.
JOHN WAUGH,
Agent,
Sunbridge Chambers, Bradford.