An Improved Device for Checking the Motion of Shuttles in Looms.
Year: 1890

page_text: Date of Application, 16th Aug., 1890
Complete Specification Left. 16th May, 1891-Accepted, 20th June, 1891
PROVISIONAL SPECIFICATION.
An Improved Device for Checking the Motion of Shuttles in
Looms.
I, JAMES CAIRNS, of 58, Firth Street, Huddersfield, in the County of York
Mill Manager, do hereby declare the nature of this invention to be as follows:-
My invention relates to an improved device for checking the motion of shuttles
in looms when entering the shuttle boxes, and consists in the provision of means
for slightly advancing the picker to meet the entering shuttle whereby the
violent concussion and vibration of the shuttle due to its motion being suddenly
arrested when a checking device is not employed is avoided, and the consequent
wear and tear on the shuttle and breakage of bobbins is to a great degree
prevented.
In carrying my invention into practice, Imount on the revolving tappet
shaft that actuates the picking shoe, an additional adjustable tappet plate or
bowl so arranged that when the picking tappet is shogged sideways to miss
the picking shoe the said additional plate or bowl will act on the picking shoe
and will depress the said shoe and advance the picking stick and picker a short
distance along the shuttle box. This advance is timed to meet the entering
shuttle, and the picker thus forms an elastic.or yielding stop for the shuttle and
gradually checks or arrests its motion while avoiding the violent concussion
before referred to. The aforesaid additional tappet plate or bowl may be
adjusted to depress the shoe any desired amount so as to regulate the distance
the picker is advanced to meet the shuttle.
When applying my invention to new looms in the course of construction I
prefer to attach my additional tappet plate or bowl to the clutch box with which
the picking tappet engages when drawn into action.
Dated this 15th day of Aumust: 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Device for Cheoking the Motion of Shuttles in
Looms.
I, JAMES CAIRNS, of 58 Firth Street, Huddersfield in the County of York,
Mill 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:-
My invention relates to an improved device for checking the motion of loom
shuttles when entering the shuttle boxes, and consists in the provision of means for
slightly advancing the picker to meet the entering shuttle whereby the violent
concussion and vibration of the shuttle .due to the sudden stoppage of its motion
when a checking device is not employed is avoided and the consequent wear and
tear on the shuttle and breakage of bobbins is to a great degree prevented.
In carrying my invention-into practice provide on the tappet shaft an additional
adjustable tappet .or bowl so. arranged that when the ordinary tappet or bowl is
shogged back, the said additional tappet or bowl will slightly depress the picking
shoe and advance the picking stick and picker to meet-the-shuttle as the latter
enters the shuttle box.

page_text: Figure 1 is a rear elevation of a portion, of a loom having my improvement
applied thereto.
Figure 2 is a side elevation of the tappets and picking shoe, and
Figures 3 and 4 are front and side elevations on a larger scale of my additional
tappet detached.
Like letters of reference indicate corresponding parts throughout the several
figures.
A is the loom frame, B the picking stick bracket, C the picking stick, Othe
picking strap, D the tappet shaft, E the ordinary tappet mounted to slide on the
shaft D, F the picking tappet block, G the picking shoe, H the shaft on which
the shoe is mounted, and I the arm fixed on the shaft H and connected to the
picking strap C¹. All the above named parts are constructed and arranged
as heretofore and their construction and mode of action need not be described.
On the tappet shaft D I secure by keying or in any other convenient manner an
additional tappet bracket a to which is adjustably fixed by a bolt c or otherwise a
plate. The said plate bis provided with a stud d that forms an axle for a tapper
roller or bowl e. 1 form the bracket a with a transverse slot a', and the plate b
with a radial slot 1 to allow of angular and radial adjustment of the tappet. For
convenience of fixing I prefer to construct the bracket a in halves as clearly shown
in Figures 3 and 4. The said additional tappet is fixed on the shaft D immediately
in front of the ordinary tappet 1 and it is preferably adjusted to act in point of time
a little later than the said tappet as will be seen from Figure 2.
The said additional tappet arranged as above described does not interfere with
the sliding or shogging movement of the ordinary tappet E but permits of the latter
actuating the shoc as heretofore.
The action of my improved device is as follows:- When the tappet E is shogged
forwards into the position for operating the picking shoe, the additional tappet by
reason of its position and radius (being behind in point of time and shorter than the
tappet E) does not touch the shoc G; but when the tappet E is shogged. back to
miss the shoe, the said additional tappet encounters the shoe and slightly depresses
the same, that is to say it depresses the shoe sufficiently to advance the picker a few
inches in the shuttle box, this advance being timed to meet the entering shuttle.
The picker and picker stick then retire with the shuttle and act to check
its motion without causing the violent concussion and vibration incident to those
cases where the motion of the shuttle is suddenly arrested. The additional tappet
may be adjusted to advance the picker any desired distance in the shuttle box to
suit varying requirements.
I sometimes attach the additional tappet bowl e to the picking tappet block F,
this construction being especially preferred for new looms.
1 provide an additional tappet such as above described on both sides of the
loom.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that I do not
claim broadly advancing the picker to check the shuttle as it enters the shuttle
box as I am aware that this was not novel at the date of my application for
Letters Patent, but what I claim is :-
The additional tappet constructed and arranged substantially as above described
and operating as, and for the purpose specified.
Dated this 16th day of May 1891.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.