IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1867

page_text: LETTERS PATENT to Thomas Robertshaw and Jonas Robertshaw, of
Ovenden, near Halifax, in the County of York, Spinners and Manu-
facturers, and James Greenwood, of the same Place, Overlooker, for the
PROVISIONAL SPECIFICATION left by the said Thomas Robertshaw,
Jonas Robertshaw, and James Greenwood at the Office of the Com-
missioners of Patents, with their Petition, on the 30th December
1867.
We, THOMAS ROBERTSHAW and JONAS ROBERTSHAW, of Ovenden, near
Halifax, in the County, of York, Spinners and Manufacturers, and JAMES
GREENWOOD, of the same Place, Overlooker, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN LOOMS FOR WEAVING," to be as
follows:-
This Invention relates to working or operating the healds or heddles in
looms for weaving, and the improvements consist in a new combination and

page_text: arrangement of means or apparatus to be used for this purpose.
We employ
ordinary jack rods and "half moons" or arched-ended levers placed as usual at
the top of the loom, to which the healds or heddles are attached by straps and
rods or by cords in the usual manner. On the end of each of the jack rods
we fix opposite to the "half moon" a lever, to which we attach one end of
an india-rubber spring the other end being attached to a bracket or stud fixed
to the loom end frame; these springs are of such strength and are so set or
arranged and adjusted as by their contractile power will lift or raise the healds
or heddles to the top or highest position required. Underneath the loom are a
series of levers hinged intermediately to the framing, each lever being connected
by a rod or cord to one of the healds or leddles, and the other end projecting
beyond the end frame. On a stud fixed to the said end frame are a series of
tappets, to which rotary motion is given by means of gearing from the crank
shaft. A series of levers with friction pullies are hinged at one end to a stud
fixed in the loom end, the pulley of each lever resting upon the periphery of
one of the tappets, and the other end of said lever connected by a rod to
one of the under levers in such manner that the full part of the tappets
operate the levers to pull or lower the heald or heddle to the bottom or the
lowest position required. The healds are thus worked or operated by and
according to the form and arrangement of the tappets with the aid of the
springs produce re-action.
::
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Robertshaw, Jonas Robertshaw, and James
Greenwood in the Great Seal Patent Office on the 30th June 1868.
TO: ALL TO WHOM THESE PRESENTS SHALL COME, we, THомAS
ROBERTSHAW and. JONAS ROBERTSHAW, of Ovenden, near Halifax, in the
County of York, Spinners and. Manufacturers, and: JAMES GREENWOOD, of the
same Place, Overlooker, send greeting.
IMAG
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WAH PU
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0197110 11
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirtieth day of December, in the year of our. Lord
One thousand eight hundred and sixty-seven, in the thirty-first year of Her reign
did, for Herself, Her heirs and successors, give and grant unto us, the said
Thomas Robertshaw, Jonas Robertshaw, and James Greenwood, Her special
licence that we, the said Thomas Robertshaw, Joseph Robertshaw, and James
Greenwood, our executors, administrators, and assigns, or such others as we, the
JULY.
171.91 111
2010 20

page_text: said Thomas Robertshaw, Jonas Robertshaw, and James Greenwood, our execu
tors; administrators; and assigns, should at any time agrée with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make; use, exercise, and vend, within
the United Kingdom of Great Britain and Ireland, the Channel Islands, and
Isle of Man, an Invention for "IMPROVEMENTS IN LOOMS FOR WEAVING,"
upon the condition (amongst others); that we, the said Thomas Robertshaw,..
Jonas Robertshaw, and James Green ui
Greenwood, our executors or administrators,.
by an instrument in writing under our, or their; of one of our or their hands and
seals, should particularly describe and ascertain the nature of the said Inven-
tion, and in what manner the same was to be performed; and. cause the
same to be filed in the Great Seal Patent Office within six calendar months.
next and immediately after the date of the said Létter's Patent:
NOW KNOW YE, that we, the said Thomas Robertshaw; Jonas Robertshaw,
and James Greenwood; do hereby declare the nature of our said Invention;.
-and in what manner the same is to be performed, to be particularly described.
and ascertained in and by the following statement thereof and accompanying
Sheet of Drawings (that is to say):-
.
This: Invention relates to working or operating the healds or beddles in
looms for weaving, and the improvements consist in a new combination and
arrangement of means or apparatus to be used for this purpose. We employ
ordinary jack rods and "half moons" or arched-ended levers placed as usual.
at the top of the loom, to which the healds or heddles are attachéd by straps
and rods or by cords in the usual manner. On the end of each of the jack*
rods we fix opposite to the half moon a lever to which we attach one end of
an india-rubber spring the other end being attached to a bracket or stud fixed.
to the loom end frame; these springs are of such strength and are so set or
arranged and adjusted as by their contractile power will lift or raise the
healds or beddles to the top or highest position required. Underneath the.
loom are a series of levers hinged intermediately to the framing, each lever
being connected by a rod or cord to one of the healds or heddles, and the
other end projecting beyond the end frame. On a stúd fixed to the said end!
frame are a series of tappets, to which rotary motion is given by means of
gearing from the crank shaft. A series of levers with friction pullies are
hinged at one end to a stud.fixed to the loom end, the pulley of each lever'
resting, upon the periphery of one of the tappets, and the other end of said
lever connected to one of the under levers in such manner that the full part
of the tappet operates the levers to pull or lower the heald or heddle to the

page_text: bottom or lowest position required. The healds are thus worked or operated
by and according to the form and arrangement of the tappets with the aid of
the springs to produce sodation ad
essages
In order that this Invention may be more fully understood we herein give
reference to an accompanying Sheet of Drawings of an ordinary loom with
our said improvements applied thereto.
In order that this Invention may be more fully understood we herein give
reference to an accompanying Sheet of Drawings of an ordinary loom with
our said improvements applied thereto.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is an end elevation, and Fig. 2 is a portion of the front elevation of
same.
The parts marked A are a series of five ordinary jack rods, and B the half
moons or arched levers, to which the healds C are respectively attached by
straps, rods, or cords in the usual manner; D are levers fixed on the ends of
the jack rods. To each lever is attached by one end an india-rubber spring E
the other end of each spring being attached to a clamp bracket F fixed to.
and projecting out from the loom end. G are a series of five levers hinged
upon a bracket H fixed to the loom end, each having one end projecting to
about the middle of the loom and there connected by tee rods I and other
rods, straps, or cords J to the healds; the other ends of these levers project
outside the loom end and are each respectively connected by adjustable rods K
to a series of five levers L which are hinged to a bracket M; these levers are
provided with friction rollers N, each of which rests respectively upon one of
a series of five tappets P mounted upon a stud Q fixed to the loom end, and
on which stud is also a spur wheel R which gears with a pinion S fixed on
the end of the crank shaft T. The tappets and wheel R are all bolted
together, so that rotary motion is communicated from the crank shaft to the
said tappets. The form of these tappets (as shewn at Figs. 3 and 4) may
be varied according to requirement. It will now be observed that as the
prominent parts of the tappets come into contact with the friction pullies they
will lift the levers, and consequently will pull down the healds or heddles, and
as those prominent parts receed or move out of contact with the friction
pullies the contractile power of the india-rubber springs will operate upon
the jack rods, and thereby lift the healds and also draw the levers back to the
former position. Thus the healds or heddles are worked or pulled down by the
tappets and lifted by the springs according to the particular form and arrange-
ment of the tappets, the action and re-action against each other being easy
and free from jerks.
Although we have shewn and described a loom with five healds and

page_text: the necessary parts for working them it will be evident that other numbers,
more or less, of healds may be used and operated by a suitable number of
tappets and springs in the same manner as herein. described. et godt
In witness whereof, I, the said Jonas Robertshaw, for and on behalf of
myself and the said Thomas Robertshaw and James Greenwood, have
'hereunto set my hand and seal, this Twenty-ninth day of June, in
the year of our Lord One thousand eight hundred and sixty-eight.
JONAS ROBERTSHAW. (L.B.)
Signed, sealed, and delivered by the
within-named Jonas Robertshaw, in:
the presence of
Wч. TASKER,
Patent Agent,
Halifax & Bradford.