Improvements connected with Loom Dobbles.
Year: 1891

page_text: Date of Application, 10th Oct.,, 1891
Complete Specification Left. 8th Aug., 1892-Accepted, 10th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements connected with Loom Dobbles.
I, SAMUEL FISH, of Spa Mill, Preston, in the County of Lancaster, Cotton
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention relates to loom dobbies of the "Keighley" class which are
actuated through the medium of a connecting rod jointed at its lower end to a crank
on the end either of the tappet shaft or of the crank-shaft of the loom and has for
its object to impart a certain amount of "dwell" to the dobby apparatus so that
the warp shed may remain open to its full extent during the complete passage of
the shuttle therethrough.
I employ a crank preferably fastened to the tappet shaft in the case of a double
lift dobby and to the crank shaft in that of a single lift dobby the crank pin of the
said crank being arranged to move or travel within a horizontally arranged slot or
opening in a metal plate capable of sliding freely up and down with each revolution
of the crank between suitable guide pillars. That end of the slot towards which
the crank pin passes when it commences to move in an upward direction is curved
upwardly and whilst the crank pin is travelling within the curved part of the slot
the sliding plate (to which is attached the lower end of the ordinary dobby connecting
rod) will remain stationary and so cause or impart the desired dwell to the knives
or lifting rods of the dobby and allow the warp shed to remain wide open long
enough for the shuttle to pass completely therethrough.
The crank arm may conveniently be slotted so that the position or "sweep" of
the crank pin may be adjusted and the amount of lift of the dobby knives varied's
required.
'as
W. LLOYD WISE,
Per F. J. Brougham,.
46, Lincoln's Inn Fields, London, W.Č., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements connected with Loom Dobbies.
I, SAMUEL BISH, of Spa Mill, Preston, in the County of Lancaster, Cotton
Manufacturer, 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 :—
This invention relates to loom dobbies of the "Keighley" class which are
actuated through the medium of a connecting rod jointed at its lower end to a crank
on the end either of the tappet shaft or of the crank shaft of the loom and has for
its object to impart a certain amount of "dwell" to the dobby apparatus so that
warp shed may remain open to its full extent during the complete passage of
the shuttle therethrough.
the
1 employ a crank preferably fastened to the tappet shaft in the case of a double
lift dobby and to the crank shaft in that of a single lift dobby the crank pin of the
said crank being arranged to move or travel within a horizontally arranged slot or
opening in a metal plate capable of sliding freely up and down with each revolution
of the crank between suitable guide pillars. That end of the slot towards which
the crank pin passes when it commences to move in an upward direction is curved
upwardly and whilst the crank pin is travelling within the curved part of the slot
the sliding plate (to which is attached the lower end of the ordinary dobby connecting