and other Looms.
Year: 1889

page_text: and other Looms.
I, ALEXANDER MELVILLE CLARK of the firm of A. M. & Wm. Clark of
53 Chancery Lane, London W.C., Fellow of the Institute of Patent Agents, do
hereby declare the nature of this invention (a communication from abroad by Robert
Simon of Weehawken, in the County of Hudson, State of New Jersey, United
States of America, Manufacturer) and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement:-
Heretofore in velvet looms, plush looms, and the like, in which a double fabric is
woven to be separated in two by a pile-cutting knife, the knife for cutting the pile has
been passed over a yielding hone or sharpener. The continued passing of the knife
over the sharpener wears a groove in the latter and leaves thereon a deposit of
steel, etc. all of which interferes with the sharpening of the knife.
The object of this invention is to overcome these objections and to provide a
movable sharpener, so that the knife will pass over a different part of the
sharpener after each cut in the fabric and thereby cause an even wear on the
sharpener.
The invention consists in the combination with a movable hone-carrier of
mechanism for intermittently moving it and changing its position so as from time
to time to present a different portion of its surface to contact with the knife.
The Invention also consists in special means for moving the hone carrier after
each passage of the knife and in details of construction and combination of parts,
as will be more fully hereinafter sei forth.
Reference is to be had to the accompanying drawings forming part of this speci-
fication in which one mode of carrying the invention into effect is illustrated, but
other mechanism for moving the hone-carrier may be used and will readily suggest
itself to any skilled mechanic.
Figure 1 is a vertical cross-section of part of a loom taken on the line c c figure 2,
looking in the direction of the arrow a², shewing a pair of the improved knife
sharpeners in position in the loom and the position of the knife with relation to
the same. Figure 2 is a plan view of a portion of a loom, shewing a pair of the
improved knife-sharpeners. Figure 3 is a view of one of the improved sharpeners,

page_text: looking in the direction of the arrow, figure 2. Figure 4 is a vertical section of
this improvement on line -k figure 3, looking in the direction of the arrow d²; and
figare 5 is an edge view of the cam used to move the slide carrying the sharpening
stone.
A in the drawing, represents a portion of the frame of a loom of the class on which
velvet or the like is made, B is a knife carried by a clamp a the end 6 of which clamp
is adapted to slide in a grooved in the loom frame A. The clamp a is secured to a
band or other carrier e which has reciprocating motion imparted to it by suitable means.
This gives the knife Ba to and fro motion. represents a piece of velvet which in
figure is shewn as being wound on two cloth beams after the pile has been out
by the knife B. represents part of the batten of the loom. These parts are all
of well-known construction and need no further description.
Fis a slide mounted in bearings in a frame G which is attached to the frame A
of the loom. The frame G carries an upwardly projecting lug which is adapted
to be secured to a projection on a cross beam a² of the frame A, best seen in
figure 1. The lug has a slot through which passes a bolti, said bolt also passing
through a hole or slot in the projection to permit a proper adjustment of the
frame G. The slide F carries an upright or projection to which is pivoted_at_the
lever H. On one end of the lever H is secured a hone or other sharpener I. Near
the opposite end of the lever or hone carrier H is attached a spring m, the other end
of which is attached to the slide F or to the frame. In figures 1 and 2 of the drawing
are shewn two frames G each carrying a slide F, lever H, and sharpener 1. In
figure 1 these frames are shewn arranged at an angle to each other. The sharpener I
on one lever H, figures 1 and 2, is shewn on the under side of said lover while on
the other lever H it is shewn on the upper side. The spring m, at the left in figure 1
at the right in figure 2 and in figures 3 and 4, is shewn attached to the lever H
outside of the pivot which tends to raise the long arm of the lever H and thereby
the sharpener I. The spring m, in the foreground in figure 1 and at the left in
figure 2, is shewn connected to the lover H between the sharpener I and its pivot .
This tends to lower the long arm of the lever Hi and thereby the sharpener 1. A
stop limits the movement of the lever H on its pivot. The sharpeners I may also
rest in part upon a bevel o on the cross-bar a³ in the frame A (figures 1 and 2). The
slide carries a downwardly projecting pin p which bears against the face of a cam J
rigidly secured on a shaft y journaled in bearings in the frame G. This shaft q also
curries a worm wheel r which gears with a worin s that is journaled in the frame G.
On one end of the worms is secured a ratchet wheel L. A lever is pivoted to the
frame G near the ratchet wheel L and carries a pawl which is adapted to engage
said ratchet wheel L. A spring secured to the frame G acts upon the lower end of
levert. A spring click w nets against the ratchet wheel L to prevent reverse
motion thereof. M. is a rod secured to the batien and adapted to actuate the
lever t. I have described these parts as applying to one instrument, although in
figures 1 and 2 are shewn two instruments. This description applies with equal force
to hoth.
The operation is as follows:-Suppose the knife B to be in the left hand part of
figure 2. The knife B now begins to move in the direction of the arrow " figure 2.
It first passes along the face of the sharpener 1 which is on the under side of
the one lever H and then over the face of the sharpener I which is on the top of the
next. lever H. As the knife continues to move, it cuts the velvet D in the ordinary
manner. At the first throw of the latten to beat home the weft, the arm M. strikes the
end of the lever which through pawl moves the ratchet wheel L a suitable
distance. This movement imparts motion to the cam J which in turn pressing upon
the pin moves the slide F and thereby the sharpener I in the direction of the
arrow figure 2, a slight distance. As the knife comes back to the first position
described, it passes over the sharpeners I I but as said sharpeners have been moved a
slight distance as stated, the knife B does not touch them at the same point as it did
before. Each time the batten is moved to beat the weft, the sharpeners are moved a
short distance until the cam J has made. say one revolution and until the pin p comes

page_text: opposite the narrow or receding part of said cam J. At this moment a spring N
secured at one end to the slide F and at the other end to a projection y on the
frame G or frame A draws the said slide F backward or in the reverse direction to
which it had been moving, ready to start forward again by the motion of the batten M
the levert and thereby the cam J as before stated. From this it will be seen that
the knife passes over a different part of the sharpener at each passage. This prevents
the formation of a groove in the sharpener as is the case with the stationary
sharpeners.
By placing the sharpeners II at an angle and with one at the top and the other on
the underside of the levers H H. I am enabled to sharpon the knife with a proper
bevel. By using two sharpeners in one loom, both sides of the knife will be
sharpened at one passage of the knife. By resting the sharpeners on the beam a²,
the proper angle will be ensured and the sharpeners will always be in their correct
positions. The hone-carrier may be operated by other means than by the batten and
lever, if desired.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a velvet loom, the combination of the reciprocating cutter B with the
sharpener I and means substantially as described for moving said sharpener from timo
to time and presenting a different portion of its surface to contact with the cutter, as
set forth.
2. The frame G, combined with the slide F. means for intermittently moving
the same, and with the sharpenor I carried by said slide, substantially as
described.
3. The slide F carrying the lever H combined with said lever and with means
for intermittently moving said slide, and with the sharpener I, substantially as
described.
4. The pivoted lever H and sharpener I combined with means substantially as
described for moving said lever intermittently, as set forth.
5. The slide F adapted to move in the frame G and carrying the sharpener I and
pin p, in combination with the cam J, and with means substantially as described for
moving said cam, as set forth.
6. The combination of the slide F carrying the sharpener I, pin p, cam J, worms
and s, ratchet-wheel L, and levert for moving same, the levert being actuated from
the batten E, substantially as described and for the purposes set forth.
7. In a loom for weaving velvei and the like, the combination of the batten with the
movable hone-carrier H and reciprocating knife B and with mechanism intermediate
between said batten and said one-carrier for moving the same by the batten, as
specified.
8. The combination in a loom of the reciprocating knife B with two movable hone
carriers H H and mechanism for moving both hone carriers from time to time, as
set forth.
9. The movable hone-carrier H combined with the knife B and with the rest or
support a and with means for shifting the position of said hone-carrier, as
specified.
A. MELVILLE CLARK.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.