US2007794A - Electrically lighted sewing machine - Google Patents

Description

July 9, 1935. J. w. DAWSON 2,007,794

ELECTRICALLY LIGHTED SEWING MACHINE Filed Aug. 20, 1954 Patented July 9, 1935 entwarf? National SewingMachine C0lnpany,Belvidere,` l lill., a corporation of Illinois l Application Augustv 20, 1934, Serial No. 740,543l

2 Claims. This invention relates to improvements in electrically lighted sewing machines.

One'of the objects of my invention is to efficiently illuminate the material to be worked upon.

. Another object is to provide simple and eili- Vcient means for mounting the lamp in the face plate of the sewing machine arm so as to be readily accessible in case it is desired to remove the lamp or the lamp and socket.

Another object is to provide an electric lamp and socket which may be mounted within the hollow face plate of the sewing machine arm and which may be removed as a unit without `disturbing the wiring for conveying electric current to the socket and lamp. e

Heretofore wiring for carrying current to the lamp has been permanently connected to the lamp socket, and in the event either required removal it was necessary to make a new connection of socket to wiring at the machine. By the construction herein described the objections to prior art constructions are avoided and the advantages of easy assembly and repair are gained.

Other objects and advantages will be apparent from the following specication.

In the drawing:

Figure lis a longitudinal vertical section of part of the overhanging arm of a sewing machine including the face plate.

Figure 2 is an end elevation of the sewing machine arm with the face plate removed.

Figure 3 is a horizontal sectional view taken on the line 3 3 of Figure l,

In that `embodiment of my invention which I have chosen to illustrate in the drawing, the overhanging arm of the sewing machine is indicated at i!! and thehollow face plate at II. The plate Il is detachablysecured to the `edges I2 of the Walls of the arm by screws (not shown) or any suitable means.` The bottom wall I3 of the arm is provided with openings I4 to .accommodate the presser foot bar and needle shaft (not shown).

The chamber within the arm I9 for holding the needle operating mechanism is separated from the space within the hollow face plate II by a at plate I5 secured by screws I6, I6, at top and bottom, to thickened portions I'I of the arm IU.

The plate I5 supports the means for conducting current to the lighting device, said means comprising lead wires I 8, I S, which extend through an aperture I9 in the plate l5, to screws 20, 20 which secure the end of each Wire to a bus bar 2| in electrical contact therewith. The bus bars 2|, ZI are insulated from the plate I5 by insulation low face plate II.

lhollow face plate I (Cl. 24U- 2.14)

22 and are fastened by rivets 23, in parallel spacedy positions, to the insulated plate I 5. Each bus bar 2I carries a contact member 24. The contacts 24 extend at right angles to the plate I5, and have parallel contact facesspaced apart to engagebetween them the socket 25.

The socket 25 comprises a cylindrical body having the upper portions of opposite sides cut away and iiattened at 25 for engagement by the contacts 24. The lower end of the socket is adapted to receive the screw threaded end of a conventional electric lamp 2l. Above the cylindrioal body of the socket is a centrally located screw threaded pin 28 adapted to extend through an opening in a bracket 29 integral with the hol- A nut 30 is screwed on the pin 28 to connect the socket to the face plate.

In assembling the parts, the wiring i8 may be conveniently attached to the bus bars 2l for conveying current to the contacts I5 may be readily secured in position on the arm It). The socket 25 and lamp 2l', mounted in the I, are brought into electrical connection with the source of current, through engagement with the contacts 24 between which the socket is-positioned when the hollow face plate is secured in its intended position on the arm I0. l

The inner surface of the face plate II will be finished to serve as a reiiector for the lamp which is entirely concealed within the hollow face plate and separated from the mechanism in the overhanging arm I0.

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

I claim as my invention:

1. An electrically lighted sewing machine comprising a longitudinally extending arm, a presser foot and needle bar mounted in the arm, a hollow face plate detachably mounted on the end of the arm -to form an end wall and portions of the side walls of the arm and having a bottom opening adjacent the presser foot and needle bar but spaced longitudinally of the arm from said presser foot and needle bar, an electric light socket and lamp carried by and located within the hollow face place, means for conveying electrical current 'to the socket, said means comprising a supporting plate secured to the arm Walls between the arm and face place, electrical contact members on thel supporting plate 24, and the plate L extending toward the end wall of the hollow face plate to engage opposite sides of the lamp socket, and electrical wiring in the arm connected through said supporting plate to the contact members, said supporting plate extending transversely of the arm and separating the interior of the arm from the interior of the hollow face plate.

2. An electrically lighted sewing machine comprising a longitudinally extending arm, a presser foot and needle bar mounted in the arm, a hollow face plate and integrally formed bracket detachably mounted on the end of the arm to form an end wall and portions of the side walls of the arm and having a bottom opening adjacent the presser foot and needle bar but spaced longitudicontact members, said supporting plate extending transversely of the arm and separating the in` terior of the arm from the lnterior of the hollow face plate.

JAMES W. DAWSON.

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