US 16405 A
Description (OCR text may contain errors)
UNITED STATES PATENT OFFICE.
DANL. W. SNELL AND S. S. BARTLETT, 0F W'OONSOGKET, IN THE TOVN OF GUMBERLAND,
Specification forming.` part of Letters Patent No. 16,405, dated January 13, 1857; Ressued September 1, 1857, No. 489.
To all whom Zt may concern:
Be it-known that we, DANIEL W. SNELL and STEPHEN S. BARTLETT, of `Woonsocket, in the town of Cumberland, in the county of Providence, State of Rhode Island, have invented a new and Improved Mechanism in Looms for W'eaving Cloth; and we do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon.
Our invention is what would be termed in mechanical parlance, a new or improved let-off motion.
In Figure 1 we have represented an end view of the loom and our said invention and mechanism. l
In the said drawings, A, denotes the frame of the loom, B, the yarn-beam or roller around which the warps are wound.
C, is a pinion working into the yarn-beam gear D, and is fast to shaft E.
F, is a friction pulley, also fast to shaft E.
G is a sectional friction-piece either made stationary to lever J, or connected by a joint so as to yield, and holds a cork, leather, or other friction in contact with the pulley F, by means of stud I, friction-lever J, and weight K.
II, is a screw to lower or raise the friction-piece G, when necessary.
I, is a stud supporting the weighted or friction lever J.
K, is a movable weight which is hung to the sliding-bar or piece marked 9, said bar or piece holding the pawls L.
N, is a sliding or vibrating rack jointed either direct to rod O, or connected with the upper arm of an intermediate lever, marked 5, whose center is seen at 6, and which is supported by a branch from lever J. When the strain of warps, acting through the positive take-up ratchet, or mechanism, (and hence on the equalizing lever P,) is used to drive or regulate the weight K, the rod O, is connected direct to rack N; when the force of spring S, is used for this purpose, the arm O, is jointed to the lower arm of lever, marked 5, and the upper arm of this lever, 5, is jointed to the rack N. Hence, when strain is made to drive the weight K, no use is made of lever 5. The arm O, in the drawings, is shown broken the desired strain. f'
T, is a rod driven by crank U hung on the cam-shaft V,-said rod T, driving the take-up lever IV, and also carries a pin X, to assist in driving, or moving ahead, when necessary, the strain lever P, as a means of acting on rack N, when the gage-spring S, is not sufficient to do it. Y, is the take-up ratchet and mechanism. Z, is the cloth-roll. &, is a roll that winds up the cloth.
A, is a lever and finger coming from the protecting rod, to raise the strain-lever pawl out of the ratchet gear Y,when the filling breaks or runs out.
B', is a stand that supports the frictionpulley F, shaft E, and pinion C.
C, is the girt. D', is the whip-roll stand.
E', is the breast beam.
The cam-shaftV, by crank U, vibrates the rod T; this vibrates the positive take-up lever I, which, by its pawl, drives the take-up ratchet and mechanism Y, and the cloth-roll Z.
P, represents the equalizing gage strain lever, hung loose on an independent stud, (said lever may be hung loose on the shaft of the positive take-upratchet, or clothroll),its upper arm carrying a pawl Q, that works into, or rests against, the ratchet Y, while the lower arm acts against a spring, S, as shown in the drawings.
Now cloth of a given number of yarn and pecks, requires a certain, uniform strain of the warps, when working in connection with the positive take-up mechanism, in order to insure uniformity of texture and true pecks. IVe will suppose this amount of strain is equal to 7 pounds for 84 pecks of number 40s filling, and that the drawings are representing this amount of strain, and number of pecks and filling. The equalizing strain lever P, as intimated, is acted upon by a spring S, as shown in the drawings, that just counterbalances this amount of strain. To the lower arm of lever P, is jointed the rod O, said rod O, being also jointed to the sliding or vibrating rack N. (In the drawings this rod, O, is shown broken off from this connecting point, for reasons already intimated.)
7e will suppose the take-up lever W, and its pawl, has a vibration suflicient to drive the ratchet Y, lteeth, (as represented between the dotted lines marked 3 and 1), or any distance less than 2 teeth, and that 1 tooth is all that is required to take up the Q pecks for 1 revolution of'the cam-shaft V. Now, when the take-up lever W, and its pawl, goes back to give another vibration, (it is represented in drawings as having made vibration) the variable strain of the warps causes the ratchet Y, to reach to the extent of the tooth, or what portion of this tooth, that may be required to vibrate the lever P, and by this movement, to vibrate the rack N, so that, by pawls L, the weight K, is moved on or along the friction-lever J, in order to decrease the friction on pulley F, so that the desired strain may be balanced by the spring S, again, as represented. The spring S, is held stationary at one end, (passing through a stud marked 7 said stud being supported by the loom-frame) and has a nut at 8, for adjusting, and is connected at the other end to a lip from rod O. Should the irregular strain of the warps, at any time, overbalance the power of the spring S, the rod T, with the pin X, is made to push, (by the cam-shaft V), the lower arm of the lever P, and by this movement, to drive the rod O, and rack N, and through these means, to'drive or move the pawls L, sliding piece marked 9, and weight K, on or along the friction-lever J. When the strain of the warps is at the proper or desiredv point, the spring S, remains inactive, and the slot in the lever P, brings up and rests against the stationary pin B, as shown in the drawings. It will be understood, by reference, that the spring, S, resists the action of lever P, to such a degree, as to balance the desired strain, and works in unison with the movable weight K, on the frictionlever J. That is to say, as the beam decreases in diameter, and as the desired strain requires, the variable strain of the warps is made to move or graduate this weight K toward the fulcrum or center of the frictionlever J, in order always to keep or retain, this desired strain uniform. Now, as the cloth is taken up, the warps are unwound from the beam B, by the same operation, and by the beating up of the reed. If the warps were wound uniformly on the beam; the filling of the same number at all times; no contraction or stretch of the warps by Variable temperature, &c., a regular increased rotary motion to the beam. would only be necessary to insure true pecks and uniform texture to the fabric. But the warps undergo this contraction and eXpansion,-the filling is variable in its number,
' made a means to regulate or produce the desired strain, the positive take-up mechanism, will take up, or pull off, the warps, so as -to give true pecks, and uniform texture.
W'e do not claim priority in using strain as a means of regulation, for under various modifications it is found in use. For instance: Hendrick employs strain acting upon or with the movable reed as his regulating feature; also, Stone, Potter and others ,-their motions acting in combination with an intermittent take-up motion. Knowles, Boyd, Bigelow, Mason and others use one or more stationary or reacting vibratory whip-rolls as their point of regulation, while Taylor and VVilcoX and others employ the beam as a means of regulation. But
We do claim:
1. Employing the positive take-up mechanism, or cloth-roll, as the point through which the variable strain and wind of warps is made to act more sensitively than from or by the variable, vibratory, reacting motion of the whip rolls, or sudden jerking of the beam, or movable reed.
2. Effecting and producing a regular delivery and uniform strain of the warps by the equalizing strain lever P, said strain lever being acted upon by the variable strain of the warps through the positive take-up mechanism, or cloth roll, as represented.
3. The equalizing strain lever P, acting in combination with the positive take-up mechanism and cloth-roll, as represented.
4t. The equalizing strain lever P, when operating in connection with thev positive take-up machanism, in combination with my mechanism for producing rotary motion to the beam, and with my device or means for regulating the delivery and strain of the warps as the beam decreases in diameter, and as the desired strain requires.
5. Employing the rod T, with the pin X, or equivalent, to act upon the strain lever P, as a means of moving the weight K, when the balance spring, S, or equivalent device, is not suflicient to move it. f
6. In combination with the pulley F and pinion C, we claim the movable weight K, the fixed or yielding sectional friction-piece Gr, and friction-lever J, as and for the purpose represented.
friegion-lever J, We claim the jointed or 10 statlona-ry sectional friction-piece G, and set-screw H, as and for the purpose repre- 7. In combination with the Weight K, and frietiondever J, We claim the rack N, or its equivalent, to, so act upon the Weight K, through catches L, or analogous devices, sented. as to gradually move this Weight K, to- DANIEL WV. SNELL. Ward the fulcrurn of lever J, as the beam STEPHEN S. BARTLETT. decreases in dzunetenend as the desired Witnesses: strain of Warp requires. BAILEY E. BORDON, S. In combination With the Weight K, and IRA IV. ARNOLD,
[FIRST PRINTED 1912.]