US72119A - dolley - Google Patents

Description

@glitten gieten n-tent @mit 1 s. T. THOMAS-AND J. H. Dornier, oF GUILDFORD, Nnw HAMPSHIRE.1

Letters Patent No. 72,119, dated December 10, 1867. l

IMPROVEMENT IN LooMs.

elle Stlgchule refont to ilvtigrst tticrs glzztcnt :mb limiting part -nf tige same.

T0 ALL WHOM IT MAY CONCERN:

Be it known that we, S. T. TIIOAIAS and J. H. DOLLEY, of' Guildford, i'u the county of Belknap,.and State of New Hampshire have invented an Improvement in Looms; and-we do hereby declare that the following,` .taken in connection with the drawings which accompany and form part cf this specification, is a. description of our invention suiiicient to enable those skilled in the art to practise it. p

The invention relates to the picker-mechanism' of looms, and particularly to that class of looms using dropboxes j and the invention consists in combining with the picker and picker-Sto', and with a lever or swinging arm connected to the picker-staff, (said arm projecting from a rocker-shaft, and beingr held normally in position' by'aspring, which spring allows the arm or lever to yield freely to the blow of the shuttleagninst the picker or picker-stati', the spring being so arrangedwith relation to the lever and the `picker-steif that' a. very slight play of the `spring allows the requisite movement of the lever and picker-stam) an incline which shall insure the removal of the picker from the path of vertical movement of the shuttle-boxes and shuttles atsuch timesas Vthe boxes are to be shifted. p

The drawings represent enough of the mechanism of a loom embodying our improvements to enable the` invention to be clearly understood- A showing a section of the loom, taken just in front of the lathe.

B and C are plans ofthe respective ends of the shuttle-race, one end having asot. of movable boxes, while the other lia-s the ordinary construction for a single shuttle. a denotes the frame ofthe loom; b, thelathe; e, the shuttle-race; d d, the picker-stares; e e, the movable boxes. At each end ofthe lathe an arm or lever, g, is hung on a pin or shaft, L, projecting from the lathe, or from a plate or brackettixed thereto. Around each pin a coiled spring, zl, is placed, Vone cud of=which is attached to the arm, and the other end te the pin, as seen at B and C, the'stress f the spring tending to move each arm and the picker-staff inwardly, and each arm being brought `to a stop by a pin or projection, lc. v In its normal positionI cach picker-staff is thus held at al-ittle distance from the end wall Z of the slot in which it traverses, and any movement from this position towards such wall is resisted bythe spring 1.'. Now, as the shuttle is thrown against either picker or rpicker-steif, it will thus be seen that the picker will `yield to the blow of the shuttle, and that by having this yield controlled bythe arm and its spring, arranged as shown, the yield is made easy and uniform, a very slight movement of the spring permitting the requisite movement of the picker- .stai at the point where the shuttle strikes.

In the normal position of each picker-stati' 4d, in which it is supported by its connection 'with the spring, it

will not allow of the free vertical movement ofthe shuttle-boxes when series of shuttles is used. To admit of such movements in looms employing drop-shutt1eboxes, a device is applied, which, at the time the boxes are to rise or fall, carries the spring z' out of action upon the picker, and allows the picker to be drawn back to the end of its slot by the actionof a counter-spring, o.

This provision is shown 'in the drawing at the left of A and at B. The lever r/ is made a bent lever, and while one `arm is connected to the spring i and to the picker, as before described, the other arm m projects toward the frame a, andA in the path-of its vibratory movement with the lathe an incline, n, is fixed upon the frame. New, as the lathe beats up, the arm m strikes the incline, carrying the arm m down and swinging-tho i other arm outwards, thereby releasing the picker from the stress of the spring, and allowing it to fall back (by the action of the spring o) out of the path of movement of the shuttles and shuttle-boxes, as shown by the. full lines at A, this movement of the boxes taking place while the arm m runs under a straight piece, p, in front ofthe incline. As the 'lathe next moves back, the arm again passes under the incline, permitting the stress of the spring to again draw the picker-staff up away from the wall of the slot, so that when ,the shuttle` is again driven against it, it forms a yielding cushion as before.

We claim, in combination with the lever y, arranged to operate as set forth, the incline n, or its equivalent,

for relieving the picker from the action of the spring t', to permitfree movement of the shuttle-boxes, substantially as set forth.

S. T. THOMAS, J. H. DOLLEY.

Witnesses@ Grno. W. STEVENS, JOHN C.' MOULTON.

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