US2081562A - Sewing machine - Google Patents

Description

May 25, 1937.

\ Filed Aug. 17, 1936 W. A. SMITH SEWING MACHINE 2 Sheets-Sheet 1 J29" l I i i i HM. g f6 ago 27 r '"29 l'l -51 In I I I J 5 ll] Z5 Mn]. 16 jnde'rzzor- [([altr fldazil $715172 Patented May 25, 1937 UNE'E'ED STATES PATENT @FFICE SEWING MACHINE Application August 17, 1936, Serial No. 86,387

4 Claims.

This invention relates to sewing machines and particularly to treadle operated machines.

The main object of the invention is to provide a treadle operated machine efficient for its intended purpose, in which the operative mechanism, including the treadle, is concealed, when not in use, in a cabinet of the knee-hole type.

Another object of the invention is to provide pivotal connecting means between the treadle shaft and cabinet base and between the treadle and reciprocating pitman whereby the treadle may be supported in horizontal or vertical position without being disconnected from any operative parts and by merely swinging the treadle and shaft about said pivotal connections.

In the drawings:

Fig. 1 is a front elevation of a sewing machine housed in a cabinet of the knee-hole type.

Fig. 2 is a view similar to Fig. 1 but showing the front and side doors of the cabinet in open positions and the treadle in its horizontal, operative position.

Fig. 3 is a horizontal sectional View taken in the plane of the line 3-3 of Fig. 2.

Fig. 4 is a front elevation of the right hand side of the cabinet in open position, as shown in Fig. 2, but showing the treadle in vertical, non-operative position.

Fig. 5 is a fragmentary, vertical sectional view taken in the plane of the line 55 of Fig. 3.

Fig. 6 is an enlarged sectional view of the pivital connection between the treadle and pitman, taken in the plane of the line Ii6 of Fig. 3.

Fig. '7 is a vertical sectional view taken in the plane of the line 'I'I of Fig. 6.

Fig. 8 is an enlarged sectional view of a detail taken in the plane of the line 88 of Fig. 4.

In that embodiment of the invention which I have chosen to illustrate in the drawings, the

work table top It has hinged to it at each end top members I I, I I, arranged to lie in the same plane as the work top IEI when the machine is in use. The machine top is supported by the cabinet walls which include a rear wall consisting of the panels 3 l2 and I3, preferably integral, a front wall consisting of the panels I4 and I5 and base IS, a short end wall I! supported by legs I8, I8, a longer end wall I9, and a side wall and side base member 2i. The side 29 is parallel with the end wall I9 and hingedly connected at 22 to the panel I3 of the rear wall. The front panel I5 consists of an upper fixed portion and a lower door section hingedly connected at 23 to the end wall I9. A floor 24 extends horizontally between the base walls I6, 2|, and end and rear walls l9,

I3, respectively. The lower part of the legs I8 are joined by a cross piece 25.

The upper part of the cabinet houses the drophead of the machine, and the chamber formed by the walls I 3, I5, I9 and 20 contains the pulley wheel, pitman, treadle and pivotal connections when the treadle is in non-operative position as shown in Fig. 1.

Any desired type of sewing machine head, having the conventional fly wheel (not shown) may be mounted in the cabinet and connected by a belt 26 to the pulley wheel 21 rotatably mounted on a stub shaft 28 supported by a bracket 29 secured to the end Wall IS. A guard 38 partially encloses the puily wheel 2'! and is supported by an arm 3! secured to the end wall IS. A pitman 32 is pivotally connected at 33 to the pulley wheel 21.

The pitman 32 is operated by a treadle 34 pivotally mounted at 35, 35, on a shaft 35. One end of the shaft 36 is supported by a bracket 3'1 se- .1

cured to the inner surface of the cross piece 25. The other end of the shaft 36 is apertured and pivotally connected by a pin or screw 38 to the upright ears 39 of the floor plate 40 rigidly secured to the floor 24.

The treadle 34 is provided with an arm M which in assuming the positions shown in Figs. 2 and 4. 7

When the machine is not in use, the operator merely raises the left hand end of the treadle shaft 36 from its support 3?, swinging the treadle shaft about its pivotal connection 38 and the treadle about its swivel ball 44 in the joint 46. This movement requires the pitman 32 and joint 46 to move laterally from the position shown in Fig. 2 to that of Fig. 4.

The treadle 34 and shaft 36 are retained in nonoperative, concealed position by a spring clip 48 secured to a support 49 in the cabinet, the clip being adapted to frictionally engage the free end of the shaft 36, as shown in Figs. 4 and 8.

In Fig. 1, the hinged side door 20 and hinged portion of the front I5 are closed, all the machine parts are concealed, and the cabinet serves as an attractive desk of the knee-hole or space type. To place the treadle in operative position, the side door 20 is swung about the hinges 22 so as to be parallel with the rear wall I3 and provide a rearclosure wall for the knee-space, as shown in Figs. 2 and 3, and the treadle shaft 36 is swung downwardly until it rests on the bracket 31 attached to the cross piece 25. Thus the treadle may be made operative or inoperative without disconnecting it from any operative parts and when moved to or from said operative or inoperative position or when supported in the operative position with other exposed operating parts of the machine the parts are protected from entanglement with material fed through the head of the machine and over the rear face of the swingable closure wall and door 2t. 7

Changes may be made in details of construction without departing from the scope of my invention and I do not intend to be limited to the exact form shown and described, except as set forth in the appended claims.

I claim:

1. A cabinet enclosed, treadle operated sewing machine comprising a cabinet having a head receiving chamber having an operating kneespace below said head and a vertically disposed side chamber at one side of said knee-space, a door closing the inner side of said side chamber, said side door being hinged to the rear wall of the side chamber and swingable about a vertical axis to leave an unobstructed space between the side chamber and the opposite side of the cabinet and form a rear closure wall for said hee-space, a pulley wheel attached to one end wall of the cabinet and within said side chamber, a pitman pivotally connected to the pulley wheel, a treadle shaft, a pivotal connection connecting one end of said treadle shaft directly to the floor of the side chamber, a treadle pivotally mounted on the shaft, a pivotal connection between the treadle and the pitman, said treadle and shaft being movable from a vertical position within the side chamber to a horizontal position across said unobstructed space after the side door has been swung rearwardly about said vertical axis, and means on the cabinet for supporting the free end of the treadle shaft in operative position.

2. A cabinet enclosed, treadle operated sewing machine comprising a cabinet having a head receiving chamber having an operating kneespace below said head and a vertically disposed side chamber at one side of said knee-space, hinged doors at the front and inner side of said side chamber, the side door being hinged to the rear wall of the side chamber and swingable about a vertical axis to leave an unobstructed space between the side chamber and the opposite side of the cabinet and form a rear closure wall for said knee-space, a pulley wheel attached to one end wall of the cabinet and within said side chamber, a pitman pivotally connected to the pulley wheel, a treadle shaft, a pivotal connection connecting one end of said treadle shaft directly to the floor of the side chamber, a treadle pivotally mounted on the shaft, a pivotal connection between the treadle and the pitman, said treadle and shaft being movable from a vertical position within the side chamber to a horizontal position across said unobstructed space after the side door has been swung rearwardly about said vertical axis, means on the cabinet for supporting the free end of the treadle shaft in operative position, and means within the side chamber for engaging the treadle shaft when in vertical position.

3. A cabinet enclosed, treadle operated sewing machine comprising a cabinet having a head receiving chamber and a vertically disposed side chamber, hinged doors at the front and inner side of said side chamber, the side door being hinged to the rear wall of the side chamber and swingable about a vertical axis to leave an unobstructed space between the side chamber and the opposite side of the cabinet, a pulley wheel attached to one end wall of the cabinet and within said side chamber, a pitman pivotally connected to the pulley wheel, a treadle shaft, a pivotal connection connecting one end of said treadle shaft to the floor of the side chamber, a treadle pivotally mounted on the shaft, a pivotal connection between the treadle and the pitman, said treadle and shaft being movable from a vertical to a horizontal position across said unobstructed space after the side door has been swung rearwardly about said vertical axis, and means. on the cabinet for supporting the free end of the treadle shaft in operative position, the pivotal connection between the treadle and pitman being bodily movable, and the pivotal connection between the pitman and pulley wheel affording play permitting slight lateral movement of the pitman when the treadle and shaft are swung from vertical to horizontal positions.

4. A cabinet enclosed, treadle operated sewing 7 machine comprising a cabinet having a head receiving chamber and a vertically disposed side chamber, hinged doors at the front and inner side of said side chamber, a pulley wheel attached to one end wall of the cabinet and within said side chamber, a pitman pivotally connected to the pulley wheel, a treadle shaft, a pivotal connection connecting one end of said treadle shaft to the floor of the side chamber, a treadle pivotally mounted on the shaft, a pivotal connection between the treadle and the pitman, and means on the cabinet for supporting the free end of the treadle shaft in operative position, the pivotal connection between the treadle and pitman being bodily movable, and the pivotal connection between the pitman and pulley wheel affording play permitting slight lateral movement of the pitman when the treadle and shaft are swung from vertical to horizontal positions.

WALTER ADAM SMITH.

Images