US140929A - Improvement in sewing-machine stands - Google Patents

Description

H. LUTH.

Sewing-Machines Stands.

Patented July 15, 1873.

UNITED STATES PATENT OE IoE.

HENRY LOTH, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN SEWING-MACHINE STANDS.

Specification forming part of Letters Patent .No. 140,929, dated July 15, 1873; application filed To all whom it may concern:

Be it known that I, HENRY LOTH, of Philadelphia, Pennsylvania, have invented an Improvement in Sewing Machine Stands, of which the following is a specification:

The object of my invention is to enable a sewing-machine to be inclined toward the operator without being raised higher than usual, without inclining the top. of the stand or table, and without increasing the distance between the'band-Wheels or pulleys on the driving-shaft and sewing-machine.

I attain this object in the manner best ob served in the perspective view, Figure 1, end view, Fig. 2, and transverse section, Fig. 3, of the accompanying drawing, by securing the sewing-machine to a bed or trap, A, hinged at a to the table B; by rendering the latter vertically adjustable in its frame D; and by so combining a spindle, F, having pinions b and d, with plain and segmental racks e and f projecting from the under side of the said table and hinged bed, that on turning the spindle in one direction the said bed shall be raised and inclined simultaneously with the depression of the table, and lowered simultaneously with the raising of the table when the said spindle is turned in the opposite direction, the bandwheels 9 and h being maintained at the same distance apart during these movements, so that the drivingband as is neither slac'rened nor tightened.

By slightly inclining the machine toward the operator,after working for a time, considerable relief is experienced, as the position of the body can then be changed, and the necessity of continual stooping avoided; but, as ordinarily accomplished, the entire table must be inclined with the machine, the latter slightly raised, and the distance betweenthe band-wheels consequently increased, so that the band must be lengthened or a new one applied.

These serious objections are entirely overcome by my invention, which I will now proceed to describe more in detail.

The table B is supported entirely by its racks e, which are adapted to guides s in the frame or stand D, the said table having sim-' ply a risiug-and-falling motion imparted to it by the spindle F, the pinions b of which gear into the said racks, as shown in Fig. 4.

The hinged bed A is controlled in its move- May 6, 1873.

ments by the pinion d of the spindle F, which gears into a segmental rack, f, hinged at z to the under side of the bed, and maintained in contact with the pinion by a spring, j. On turning the spindle in the direction of the arrow, Fig. 3, the hinged bed will be raised and inclined simultaneously with the depression of the table, the downward movement of the latter exactly compensating forthe upward movement of the former, so that the machine will not be raised higher than usual, but simply inclined, and so that the band-wheel h of the machine and the driving-band wheel g shall be maintained at the same distance apart from each other, whether the machine be level or inclined.

This latter feature will be observed on reference to Figs. 2 and 3, which represent the parts in their two extreme positions, and in which it will be seen that the dotted lines y and z, drawn through the centers of the upper and lower band-wheels h and g, are parallel, or nearly so.

The compound movement of the hinged bed renders it necessary to hinge the segmental rack f, as above mentioned.

The spindle F is provided at one end with an operating knob or handle, k, and has also a pawl and ratchet, m, to prevent the falling of the table and accidental inclining of the machine when it is desired to maintain the parts in the position shown in Fig. 2.

I claim as my invention 1. The combination of the top B, hinged bed A, and the pinions and racks, or equivalent devices, whereby the opposite movements of the top and bed are so equalized as to preserve the distance between the band-wheel h and the driving-shaft revolving in fixed bearings.

2. The combination, with the hinged bed or trap A and adjustable table B, and with their racks f and e, of the spindle F and its pinions for simultaneously operating the said hinged bed and table, substantially as herein described.

In testimony whereof I have signed my name to this specification in the presence oi two subscribing witnesses.

HENRY LOTH.

Witnesses:

WM. A. STEEL, HU'BERT HowsoN.

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