US1785856A - Electrically-lighted sewing machine - Google Patents

Description

Dec. 23, 1930. D. H. CHASON 1,785,856

ELECTRICALLY LIGHTED SEWING MACHINE Filed Dec. 3, 1929 2 Sheets-Sheet l Dec. 23, 1930. D. H. CHASON 1,785,856

ELECTRICALLY LIGHTED SEWING MACHINE Filed Dec. 5, 1929 2 Sheets-Sheet 2 Patented Dec. 23, 1930 UNITED STATES PATENT OFFICE.

DANIEL H. CHASON, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGER MANU- FACTURING COMPANY, 01 ELIZABETH, NEW JERSEY, A GOIRIIORATION OF NEW JERSEY ELECTBICALLY-LIGHTED SEWING MACHINE Application filed December This invention relates to sewing machine lighting devices and has for an object to provide a sewing machine with a built-in lighting device, as distinguished from an at- 5 tachment, which will (1) operate directly from the. usual commercial house lighting circuits without the use of a step-down transformer or other auxiliary apparatus; (2) will strongly illuminate the work at the stitching point without casting objectionable shadows; (3) will not obstruct'the space under the overhanging gooseneck of the sewing machine; (4) will not glare into the eyes of the operator, and (5) will be of neat and attractive appearance.

To the attainment of the ends in view, the usual overhanging sewing machine gooseneck has been slightly modified, preferably by providing the downwardly inclined under wall of the needle-bar housing head at the free end of the gooseneck with a seat for reception of the socket-member of an electric lamp having its longitudinal axis substantially parallel to said under wall. The lamp is clined-under wall of the needle-bar head, which under wall is preferably slightly recessed to accommodate the lamp. The center of illumination is close to the bottom end of said head and is slightly to one side of a vertical plane through the line of seamformation, where it is in a position to project the light at a high angle down upon the stitching point. This is desirable, inasmuch as the light is caused to shine onto the work between the toes of the presser-foot and no objectionable shadow is cast byone of the presser-foot toes onto the surface of the work between the toes where the line of stitching lies.' Also, the work is illuminated in rear of, as well as in advance of, the sewing point, so that the stitching may be readily inspected without interference caused by the shadows of the presser-foot and -bar. v 1

In the accompanying drawings, Fig. l is a side elevation of a sewing machine embodying the invention. Fig. 2 is a section on the line 22, Fig. 1. Fig. 3 is a section on the line 3-3, Fig. 1. Fig. 4 is a section on the line 44, Fig. 1. Fig. 5 is a perspective'view located closely adjacent the downwardly in 8, 1929. Serial N0. 411,323.

of the sewing machine gooseneck with the lamp-bulb and reflector removed. Fig. 6 is a perspective view of the reflector, and Fig. 7 is a section on the line 77, Fig. 4.

In the preferred embodiment of the invention il-lustrated,-1 represents the bed of a sewing machine havinga gooseneck including the overhanging arm 2 terminating in a housing head 3 for the needle bar 4 and presserbar 5 carrying, respectively, the needle 6 and presser-foot 7. The gooseneck is provided in its under wall, at the juncture of the arm 2 and head 3, with a seat 8 to which is secured by the U-shaped strap 9 the socketmember 10 of an electric lamp including the lamp-bulb 11 which is of a type adapted to operate directly on the usual commercial house-lighting circuits without .the use ofa stepdown transformer or other auxiliary apparatus. The socket 10 may have a neck 12 entering an aperture 13 in the arm 2 through which the connecting wires 14 pass from the socket 10 to the connector 15 adapted to receive the current-supply plug 16. The socket 10 has a small side-aperture 10 which is entered by the inwardly projecting hump 10" on the strap 9 to prevent the socket from turning. One leg of the current supply line 14 between the connector 15 and the socket 10 includes the switch 16' which may be of the well known one-hole-mounting toggle-type, adapted for mounting in an aperture in the arm 2.

The downwardly inclined under wall of the head 3 is preferably recessed at 17 to partially receive the lamp-bulb 11.

The head 3 is provided on its inclined under wall with side seats 18 connected at their upper ends by the top seat 19 in overlapping relation with which is secured, by screws 20, the trough-shaped reflector 21 which, together with the under wall of the head 3, constitute a complete circumferential enclosure for the lamp-bulb 11 and socket 10. The detachable reflector 21 blends in with the lines and surfaces of the arm 2 and head 3, so that it is not conspicuous and appears to be a continuous or integral part of the arm casting. r

The longitudinal axis of the lamp-bulb 11 and socket 10 is substantially parallel to the inclined under wall of the head 3, so that re moval and replacement of the necessarily rather large lamp-bulb may be effected without interference by the head 3-. There is a practical limit to the reduction in size of lamp-bulbs designed to operate directly on commercial lighting circuits. This limit is much larger than that for automobile type and flash or battery-operated types. The present invention is believed to be the first to overcome the obstacles in the way of a practical built-in sewing machine light using bulbs of a size requisite for direct operation on commercial lighting circuits.

Having thus set forth the nature of the invention, what I claim herein is 1. A sewing machine having a gooseneck comprising an overhanging arm tergo minating in a needle-bar housing head having a downwardly inclined under wall, an electric lamp including socket and bulb members disposed under and closely adjacent said inclined under wall, and a trough-shaped reflector applied to said housing head, the

under wall of said head and said troughshaped reflector, taken together, constituting a complete circumferential enclosure for said lamp.

2. The construction set forth in claim 1 in which the longitudinal axis of the lamp is substantially parallel to the inclined under wall of the needle-bar housing head.

3. The construction set forth in claim 1 in which the under wall of the needle-bar housing head is recessed to partially receive the lamp bulb.

4. The construction set forth in claim 1 in which the socket member is secured to 40 the under Wall of the needle-bar head by the U-shaped strap.

5. The construction set forth in claim 1 in which the reflector is secured with its edges in overlapping relation with side seats specially provided on the inclined under wall of the needle-bar housing head.

In testimony whereof, I have signed my name to this specification.

DANIEL H. CHASON.

Images