Improved Moveable Pivot for Hinging or Pivoting the Picking Arms of Power Looms.
Year: 1894

page_text: Date of Application, 4th Oct., 1894
Complete Specification Left, 2nd July, 1895-Accepted, 3rd Aug 1895
PROVISIONAL SPECIFICATION
Improved Moveable Pivot for Hinging or Pivoting the Picking
Arms of Power Looms.
JAMES DODDS, Cannon Street, Selknk in the County of Selkirk, North
Britain, Power Loom Tuner, do hereby declare the nature of this invention to be
as follows.-
The object of this improved moveable pivot for the picking arms of power
looms is to obviate the breaking of the picking aims when the loom hanks and to
lessen the tear and wear on the shoe. The invention relates to an improved
moveable pivot upon which the picking aims of power looms vibrate The end of
the picking arins instead of being hinged on a fixed pivot as at present is hinged
on a pivot mounted on a sliding bar which shides a guide bracket attached to the
louin. The outer end of the sliding ban being preferably made square to prevent
it from tuming, the inuer end between the pivot and the loom being round and on
which an open spring is carried between a shoulder next to the squale end of the
sliding bar and the guide through which the round end of the sliding bat slides.
The sliding ba is provided with a stop which prevents the sping throwing the
sliding bar with the pivot too far back. In the event of the loom banking though
any cause whatever and preventing the picking atm making its regular pick the spring
18 compressed by the sliding bai thus enabling the pivot to give way to the strain
on the picking aim instead of bicaking it or some other part oi straining the loom
as is the case when the pivot is fixed and held perfectly rigid
A closed sping may be attached to the sliding bar for the above purpose in
place of an open sping as before described These springs can be adjusted to suit
the resistance.
Dated this Nineteenth day of September 1894.
COMPLETE SPECIFICATION.
Improved Moveable Pivot for Hinging or Pivoting the Picking
Arms of Power Looms.
1, JAMES DODDS, of Cannon Street, Selkih, in the County of Selhuk, North
Bain, Power Loom Tuner, do hereby declare the nature of this invention and
in what manue the same 15 to be performed, to be particularly described and
ascertained in and by the following statement
This invention has reference to the manner in which I construct and arrange a
moveable or yielding pivot for the picking arms of power looms, so as to obvinte
the breaking of the picking arms when the looms bank and to lessen the tear and
nca on the shoe.
In the accompanying sheet of explanatory diawings—
Figure is a part sectional elevation of my improvements when attached to a
loom frame, and Figure 2 is an end elevation of the same.

page_text: In caring my invention into effect I provide a pivot upon which the pickg
aim A of the power loom vibrates The end C of the picking arms mistead of
being binged on a fixed pivot as at present, is hinged on a pivot C which is finally
mounted on a sliding bai D which slides in a guide bracket K attached to the
loom The outer end of the sliding bai II we make preferably rectangular to
prevent it from turning, the inner end between the pivot and the loom being
preferably round, and on which an open spring G is carried between a shoulder next
to the square end of the sliding bai and the guide F through which the round end
of the sliding ban slides. The sliding bai is provided with a stop E which prevents
the spring G throwing the sliding bai D with the pivot C too far back.
event of the loom arm A banking through any cause whatever and preventing the
picking aim making its regular pick, the sping G is compressed by the sliding
bai B, thus enabling the pivot C with the sliding bai to yield or give way to the
strain on the picking am Austead of breaking it or some other part, or straming
the loom as is the case when the pivot is fixed and held perfectly rigid.
In the
1 vary the form of sping for use upon my sliding bar and make them capable
of being adjusted to suit the resistance.
The loom stops immediately through the belt shifting. Instead of allowing the
belt to shift sometimes stop the loom at once by connecting the end 11 of the
sliding bar D to the handle M or other part of the gear for stopping the loom by
means of a 1od I and bell crank J Figmes 1 and 2, which stops the loom instantly
when the spring is slightly compressed.
By this arrangement the strain on the picking gear is greatly reduced owing to
the sping G not requning to be compressed to the extent which is necessary to
cause the belt to shift.
I adjust the movement of this knock off' gear by means of a loose collar with set
screw on the 1od 1 which actuates the bell crank J I. vary the arrangement of
the rods and levers to suit the different types of looms to which my invention is
applied.
When applying my invention to new looms I prefer to cast the bracket K
having the guides E and F cast in one piece, but when applying it to existing
looms the guides are conveniently cast on a separate bracket which is bolted to
the bracket K by a bolt where the original fixed stud was hxed
Having now particularly descubed and ascertained the nature of my said inven-
Lion, and in what manner the same is to be performed, I declare that what I
claim is―
1 In a power loom, the arrangement of a yielding pivot on bearing for the
picking aim, substantially as and for the purposes herein before described and as
illustrated in the accompanying drawings.
2. The construction and arrangement of a yielding bearing or pivot for carrying
a vibrating aim or lever, with a spring and guide frame, and having the end of the
yielding or sliding bai arranged to operate a knock off lever or stopping lever,
substantially as and for the purposes herembefore described and as set forth in
the accompanying drawings.
Dated this 1st day of July 1895.
MARKS & CLERK,
18 Southampton Buildings, London, W.C, Agents,