US1948336A

US1948336A - Lighting device for sewing machines

Info

Publication number: US1948336A
Application number: US632112A
Authority: US
Inventors: Corrall Herbert
Original assignee: Singer Co
Current assignee: Singer Co
Priority date: 1931-12-10
Filing date: 1932-09-08
Publication date: 1934-02-20
Anticipated expiration: 1951-02-20

Description

Feb. 20, 1934. H, CORRALL LIGHTING DEVICE FOR SEWING MACHINES Filed Sept. 8, 1932 3% w-wtoz/ Herbert Corra/Z Patented Feb. 20, 1934 UNITED STATES PATENT OFFICE LIGHTING DEVICE FOR SEWING MACHINES Application September 8, 1932, Serial No. 632,112, and in Great Britain December 10, 1931 5 Claims.

This invention relates to electric lighting devices for sewing machines and has for its object to provide an anti-vibration fitting for lighting devices of this class.

According to the invention the lamp holder is sustained by the free end of a blade spring anchored at its other end to a support adapted for attachment to the goose-neck of the sewing machine.

An electric lighting device constructed in accordance with the invention is illustrated in the accompanying drawing in which Fig. 1 is a per spective View showing the device fitted at the rear side of the sewing machine goose-neck, Fig. 2 a part elevation part longitudinal vertical section of the device, and Fig. 3 an elevation part transverse section at right angles to Fig. 2.

The lighting unit illustrated in the drawing conforms generally with the construction described in the specification of U. 5. Patent application Serial No. 487,933 filed 11th October, 1930.

Referring to the figures, 1 denotes the lamp holder including a socket shell made of a moulded composition, assembled with a lamp shade 2 made also of a moulded composition and fitted with a reflecting liner 3 extending archwise above the elongated lamp bulb 4 disposed horizontally closely in rear of the goose-neck 5 of the sewing machine. Strung on a sleeve fixed to the rear end of the socket shell and insulated therefrom is an angle lug 6 secured by means of a screw '7 to the rear end of a cantilever blade spring 8 extending above and in the same general direction as the complete lamp holder assembly, i. e., with the flat sides of the blade approximately horizontal. The forward end of the blade spring 8 is anchored by means of a screw 9 to the protecting roof portion of a sheet-metal bracket 10 adjustably secured to the goose-neck 5.

The bracket 10 is formed in its roof portion with a transverse slot 11 penetrated by the blade spring 8, the portion of the blade spring 8 projecting through the slot 11 to the upper side of the bracket 10 being penetrated by the screw 9 and engaging a seat 12 presented by the bracket 10 at a slight inclination to the upper wall of the bracket 10.

Between the upper face of the spring 8 and the under side of the roof portion of the bracket 10 is interposed a buffer spring in the form of a joggled blade spring 13 secured at one end to the spring 8. Between the lower face of the spring 8 and the lamp shade 2 is interposed a similar buffer spring 14 also secured at one end to the spring 8.

The bracket 10 is of angle form and has an attaching side-wall portion 15 formed with two slots 16 engageable selectively with a stud 17 screw-threaded into the goose-neck 5 and serving also as a fulcrum for the usual treadle-operated presser-lifting lever 18, the flange 15 being adjustably nipped between a collar 19 integral with the stud l7 and a nut 20 engaging the outer end of the stud 17.

I claim:--

1. An electric lighting device comprising a support adapted for attachment to the gooseneck of a sewing machine, a cantilever blade spring anchored at one end to said support, and a lamp holder sustained by the free end of said spring and extending underneath the latter toward the anchored end thereof.

2. An electric lighting device comprising a slotted bracket adapted for adjustable attachment to the goose-neck of a sewing machine, a cantilever blade spring penetrating the slot in said bracket and secured at one end to said bracket, and a lamp holder sustained by the free end of said spring beneath said bracket and said spring.

3. An electric lighting device comprising a bracket adapted for attachment to the gooseneck of a sewing machine, an electric lamp and lamp holder disposed in general parallelism with and beneath said bracket, an angle lug fixed to said lamp holder, and a blade spring anchored at one end to said bracket and at the other end fixed to said lug, said spring being above said lamp holder.

4. An electric lighting device comprising a support adapted for attachment to the gooseneck of a sewing machine, a cantilever blade spring anchored at one end to said support, a lamp support sustained by the free end of said blade spring and extending underneath the latter toward the anchored end thereof, and buffer springs interposed respectively between said blade spring and said support and between said lamp holder and said blade spring.

5. An electric lighting device comprising a horizontally disposed lamp holder, a blade spring secured at one end to the lamp holder and overlying the latter, and a supporting bracket having an attaching side-wall portion and a roof portion overlying said lamp holder and blade spring, the other end of said blade spring being secured to the roof portion of said supporting bracket.

HERBERT CORRALL.