Improvements in Driving Mechanism for Pile Forming Apparatus in Looms for Weaving.
Year: 1897

page_text: Date of Application, 7th Oct., 1897
Complete Specification Left, 11th June, 1898-Accepted, 13th Aug., 1898
PROVISIONAL SPECIFICATION..
Improvements in Driving Mechanism for Pile Forming Apparatus
in Looms for Weaving.
We, ROBERT BARCLAY, Junior, Power Loom Tenter, of Gleniffer View, Elderslie, and
ARCHIBALD FULTON CRAIG, Engineer, of Caledonia Engine Works, Paisley, both in the
County of Renfrew, do hereby declare. the nature of our invention to be as follows:-
This invention has reference to improvements in and relating to the driving
mechanism of looms and especially those used for weaving pile carpets, and comprises
an improved arrangement for driving the reciprocating rack bar which operates
through a spur pinion the rope drum that gives the reciprocatory to and fro motions
to the wires for raising the pile of carpet.
Heretofore the cam, which is formed with a groove preferably of nearly oval
shape, was mounted fast on a second motion shaft which received its motion
through a pinion and spur wheel from the longitudinal first motion shaft of loom,
and by a roller or pulley mounted on a projecting stud carried on a lever with
slotted end operated the reciprocating rack bar.
By our improvements we cast or combine in one the cam and a spur or toothed
wheel, and mount same to rotate loose on the said second motion shaft. The
first motion shaft is extended and its end carried in bearings in an end frame,
and a pinion is keyed on same to gear into the spur teeth of cam wheel so that
same shall be actuated in time unison with the second motion shaft. By this
arrangement looms can be constructed to weave fabrics of greater width.
Dated the 6th October 1897
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
Improvements in Driving Mechanism for Pile Forming Apparatus
in Looms for Weaving.
We, ROBERT BARCLAY, Junior, Power Loom Tenter, of Gleniffer View, Elderslie,
and ARCHIBALD FULTON CRAIG, Engineer, of Caledonia Engine Works, Paisley, both
in the County of Renfrew, do hereby declare the nature of our invention, and in
what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement, that is to say :-
This invention has reference to improvements in driving mechanism for pile
forming apparatus in looms for weaving and comprises an improved combination
of cam and spur wheel for driving the reciprocating rack bar which operates
through a spur pinion the rope drum that gives the reciprocatory to and fro motion
to the wires for raising the pile of carpet.

page_text: And in order that our said invention and the manner of carrying same into
practice may be properly understood we have hereunto appended an explanatory sheet
of drawings in which Figure 1 represents in elevation and Figure 2 in plan view part
of a loom to which our improvements are shown applied.
Referring to these drawings:-
By our improvements we cast or combine in one the cam A and a spur or toothed
wheel A¹ and mount same to rotate loose on the second motion shaft B¹. The first
motion shaft B is extended and its end B2 carried in bearings in an end frame Z and a
pinion b is keyed on same to gear into the spur teeth A¹ of cam wheel A so that
same shall be actuated in time unison with the second motion shaft B¹.
A roller C is mounted on a projecting stud C¹ carried on the lever C². The one end
of this lever C is loosely fulcrumed on a stationary spindle C³, while its other end is
slotted and by the motion from cam A reciprocates the bar D which is formed with
rack teeth. This rack D gears into a pinion D¹ mounted on the spindle D2 of
drum D3, and by this means reciprocatory to and fro motions are given to the wires
for raising the pile of carpet. By this arrangement looms can be constructed to
weave fabrics of greater width.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :-
First. In pile forming apparatus in looms for weaving, the driving mechanism
comprising a grooved cam and a toothed wheel cast in one, in combination with
gear connections to reciprocate the rope drum, substantially as set forth.
.
Second. In pile forming apparatus in looms for weaving, the driving mechanism
comprising the combination of toothed pinion b, cam and toothed wheel A A¹,
lever C² carrying roller C toothed rack D, toothed pinion D¹, shaft D² and rope
drum D³ substantially as set forth.
Dated the TALL
1000