Improvements in Looms for Weaving in which Tappets or Cams Acting in Conjunction with Treadles or Levers are employed to Actuate the Healds.
Year: 1891

page_text: Date of Application, 4th June, 1891-Accepted, 18th July, 1891
COMPLETE SPECIFICATION.
Improvements in Looms for Weaving in which Tappets or Cams
Acting in Conjunction with Treadles or Levers are employed to
Actuate the Healds.
I, WILHELM FRIEDRICH SCHEIDT of M. Gladbach, Germany, Merchant 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 looms for weaving in which tappets or cams acting in
conjunction with treadles or levers are employed to actuate the healds and consists in
improvements by means of which the treadles or levers are prevented from becoming
disengaged from the tappets or cams and so becoming liable to become broken or to
cause injury to the tappets or cams or other parts of the loom.
In order that my invention may be readily understood I will now describe it with
reference to the accompanying drawings.
In the accompanying drawings Fig. 1 is a side view partly in section showing
two tappets or cams and the treadles or levers employed in conjunction therewith
and serves to illustrate more clearly the object of my invention.
In Fig. 1 are shown two tappets or cams a with the treadles or levers & employed
in conjunction therewith. The tappets or cams a shown in Fig. 1 are provided
with outer fillets or ribs a' which ensure that the bowls or rollers 6 or the treadles
or levers & shall move into the hollows or depressed portions a² of the operative
surfaces of the said tappets or cams a even although in consequence of stretching
or other alteration of length in the cords or other means employed as indicated in
Fig. 2 to connect the treadles or levers with the healds, the bowls or rollers on
the treadles or levers should not be closely pressed against the operative surfaces
of the tappets or cams a. In the arrangement illustrated in Fig. 1 there is a serious
defect, in that if the cord or other means employed to connect one of the treadles
or levers b to the lower shaft or heald of the loom to which the said treadle or
lever is connected the tension or strain upon the other cord or other means
connected to such treadle or lever 6 due to the weight of the heald and other parts
connected to such cord or other means would cause the said treadle or lever to
be raised above its normal position and thus bring the bowl or roller upon such
treadle or lever & into a position in which it might be struck by or prevent the
motion of the fillets or ribs a¹ upon the cam or tappet a used in conjunction with
the said treadle or lever b. When this occurs a breakage of or injury to the tappet
or cam a or treadle or lever or to some of the other parts of the loom frequently
results. My invention consists in improvements which while being applicable to
all looms in which tappets or cams are employed to operate the shafts or healds,
are more particularly applicable to looms in which the tappets or cams employed
are formed or built up of segmental sections and provided with fillets or ribs such
as the fillets or ribs a' illustrated in Fig. 1 and consists in an arrangement of
apparatus by which I am enabled to prevent breakage of or injury to the treadles
or levers or tappets or cams or other parts of the loom from being caused by a
treadle or lever failing from any cause to be kept in contact with the tappet or
cam employed in conjunction with such treadle or lever.
In Figs. 2, 3 and 4 of the accompanying drawings Fig. 2 is a front view of so
much of a loom as is necessary to illustrate the application of my invention and
Figs. 3 and 4 are respectively a side view and a front view drawn to a larger scale
than Fig. 2 and showing the construction and arrangement of the improvements in
which my invention consists. In Figs. 2, 3 and 4 the same letters of reference are
used to indicate corresponding parts.

page_text: In the said figures c, e are the tappets or cams employed to operate the treadles
or levers which are connected by cords e or other suitable means to the levers f
which are connected by cords or other suitable means to the upper parts of the
healds. The dise mounted upon the shaft upon which the tappets or cams c
are mounted and the disc-like portions of the tappets or cams serve to prevent
the treadles or levers d from becoming disengaged from the cams by which they
are respectively operated. The treadles or levers 4 are also connected by cords or
other suitable means to levers which are connected by cords ; or other suitable
means to the lower parts of the healds k. In order to prevent the bowls or rollers
or other parts by means of which the tappets or cams e act upon the treadles or
levers d from becoming disengaged from the said tappets or cams c place above
the treadles or levers da plate or bar m which is made of such length that it extends
over all the treadles or levers d. The plate or bar m is secured to a rod or bar n
which is capable of being slidden upwards and downwards in and is guided by a
bracket o secured by means of bolt or set screw p to the framework 7 of the
loom. The hole in the bracket o through which the rod or bar n passes is
made of a square or other suitable angular form so that the rod or bar nis prevented
from turning therein. The bracket is formed in two parts o¹, o² connected by a
bolt and nut or set screw » or other suitable means so that the plate or bar m may
be readily adjusted in position relatively to the treadles or levers d. Around the
rod or barn is placed a spiral springs which at one end bears against the plate or
bar m and at the other end bears against the bracket o. The spring s which is
made of suitable strength tends to press the plate or bar m downward in the direction
indicated by the arrow A. The plate or bar m is therefore always pressed against
the treadles or levers d and thus while such treadles or levers d can be moved
upwards and allowed to descend by the tappets or cams c which respectively act
upon them they are prevented from being raised higher than is necessary to allow
the projecting parts of the tappets or cams c to pass beneath the bowls or rollers or
other corresponding parts of the treadles or levers d respectively operated by the
tappets or cams c. If therefore one of the cords orj by means of which a treadle
or lever d transmits motion to the heald & in conjunction with which it is employed
should break the said treadle or lever d would not be raised by the weight of the
parts connected thereto out of contact with the tappet or cam e in conjunction
with which it acts and thus all danger of breakage or injury to the tappets or
cams c and treadles or levers d or other parts of the loom arising from the breakage
of any of the cords used to connect à treadle or lever with the heald k to
which it communicates motion is obviated. The application of the plate or bar m
always pressed against the treadles or levers d causes the movements of such
treadles or levers d to be performed much more quietly and steadily than has
hitherto been the case and thus the movements of the shafts or healds of the
loom are also caused to be performed more quietly and steadily than hitherto and
thus the wear and tear and strain to which such shafts and healds are subjected
are much reduced. The plate or bar m may be adapted in length to the number
of treadles or levers d employed in the loom to which it is to be applied and the
bracket o being as above described formed of two parts o¹, o2, connected together
by a bolt and mut or set screw or other suitable means the position of the plate
or bar m may be very readily adjusted as may be necessary in mounting such plate
or bar m in the loom to which it is to be applied. I would have it understood that
the plate or bar m may instead of being caused to bear or act upon the treadles or
levers d at the place at which it is shown in the accompanying drawings may be
caused to bear or act upon the said treadles or levers d at any other suitable place
in the length of such treadles or levers d. I would also have it understood that
instead of the plate or bar m being pressed downwards by the spring s, the spring s
may be a spring under tension and secured to a stud or like part of suitable length
projecting from the side-frame of the loom and pulling the plate or bar m down-
wards and in such cases the rod or barn may be dispensed with, the spring employed
then serving to retain the plate or bar m in position upon the treadles or levers d.

page_text: Although I have in the accompanying drawings illustrated my invention as applied
to a loom in which the tappets or cains are provided with fillets or ribs a¹ I would
have it understood that my invention is also applicable to looms in which the
tappets or cams are without such fillets or ribs a'. I would also have it understood
that my invention is applicable to looms in which the treadles or levers instead of
being acted upon by the upper portions of the tappets or cams by which they are
operated are acted upon by the lower portions of the said tappets or cams.
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 what I
claim is-
In a loom for weaving in which tappets or cams acting in conjunction with treadles
or levers are employed to actuate the healds, a plate or bar such as m and a spring
such as arranged and employed substantially as herein before described in reference
to and indicated in and by the accompanying drawings and for the purpose of
preventing the treadles or levers from being moved out of position in regard to the
tappets or cams by which they are operated even in case of the breakage of any of
the cords or other means employed to connect such treadles or levers to the healds
to which they transmit motion.
Dated this Third day of June 1891.
HOWARD CHEETHAM,
Manchester, Agent to the Applicant.