US1501064A - Coil-bending device - Google Patents

Description

Jul 15;. 1 24. 1.501.064

G.-B. ROESCH,

con. BENbINe DEVICE Filed June 18. 1921 Y INVENTbR II GZ' RQE 6.1?0550/1 Patented July 15, 1924.

I 1,501,064 ,ATENT OFFICE.

GEORGE BANCROFT aonscn, or BLOO-MFIELD, new JERSEY, ASSIGNOB To WESTING- HOUSE LAMP COMPANY, A CORPORATION OF rENNsYLvAnIA.

COIL-IBENDING DEVICE Application filed June 18, 1921 Serial No. 478,543.

This invention relates to an apparatus for shaping or bending filamentary" material, and more particularly it has to do with means; for bending incandescent lamp filaments into. desired shapes for mounting;

Anobje'ct of'this invention is to provide a novel: apparatus for forming bends in filamentary material suclr as coiled filaments without injuring the filaments; for simultaneously forming the bends in a plurality of wires fed to" the apparatus; for forming such bends at uniform distances throughout thelengths of the several wires; and for ya rying the distances between bends in any two wires. I 7

Other objects of the invention will be apparent from the following description.

In some types of incandescent lamps, it is desirable to employ coiled filaments bent into certain shapes-such, for instance, as the saw tooth or star? shape; both shapes being well known to persons skilled in this art. In making the bends'in the coiled fila T ment employed in such a lamp, particular attention is required to prevent the circular filament from becoming squeezed and set in an oval shape. Certain machines have been designed and successfully Operated to accom lish this bending operation.

owever, thesemachines are not susceptible to adjustment so as to change the spacing between the bends in the filament and for this reason lackflexibility.

The present invention contemplates a machine capable=of forming bends at uniform distances in a filament, either of the coiled or uncoiled type and also being adapted to change-the spacing between bends without special adj ustlnent of the machine.- 4 In understanding the invention,- reference is to b made to the accompanying: drawings in which; D

Fig. 1 isa side View of my coil bending machine, i

Fig. 2 an end'view'o'fthe machine with a 'r 1? were? the st eflwis brekee awayr- Fig. 3 is a view in elevation of a coiled filament mounted upon the supports of an electric incandescent lamp;

Fig. 4; is a view of a section of'a coiled filament before bending; and

Fig. 5 shows a portion of bent-filament;

Themachine illustrated in. the drawingsis provided with two co-operating rollers; 1 and 2 mounted on shafts 3 and 4 which in turn are mounted. in suitable standards 5:. The rollers are driven insynchronism. bya' suitable power transmitting means such as beveled gears 6 and 7 operated by a shaft 8 driven by any suitable source of power (not shown). The filament wire is formed Or bent as it passes between the rollers by being moved into contact with dies 9" carried by the rollers. These dies 'areuniformly spaced as shown and are positioned .to extend beyond resilient surfaces 10 which are usually formed of rubber. the co-operating rollers in forming; the bends is readily appreciated by reference to Fig. 2 wherein there is illustrated a filament 11 passing between the rollers. It is to. be noted that One of the dies in roller 1' is engaging the resilient surface of roller 2 and is pressing the filament against the-rubber surface to form a bend therein. The bend being formed corresponds to bends 12' already formed in the part of' the filament which has passed from between the rollers. Preferably, the rollers are assembled to co operate in a manner to have'the dies in one roller engage the resilient surfaces of the other roller at points midway between the dies thereof. By reason of such-co-operation of therollers'bends are formed in the filament at uniform distances.

The rollersin the machine are tapered and are arranged to have a line'engagement'. The dies carried by therollers are positioned lengthwise of the rollers and in converging relationship to each other; With this type of co-operating rollers, filament wires may be fed between the rollers at any desired point along their engaging surfaces. Since the dies are converging fromth'e right handend of the rollers illustrated in Fig. 1 to the left hand end,'it' will be appreciated that the filament wiresfed at the-right hand end will have bends formed therein at greater distances apart than filament wires fed between therollers-at the lefthand end. Su ks designat theeasements The action of provides for simultaneously feeding a plurality of filament wires between the rollers filament wires between the rollers are provided in the form of guides 13 which are T slidably mounted on a suitable support 1.4

carried by standards 5. For purpose of illustration, two of the guides are shown in Fig. 1 although it is to be understood that any number may be provided if desired.

The support 14: carries a suitable calibrated scale 15 which is calibrated to indicate the distance betweenbends formed in a filament wire which may be fed between the rollers at a particular calibration point. The guidesafter being adjusted to a'desired position, may be firmly afiixed on the support 14: by tightening suitable set screws 16.

An illustration of a coiled filament wire shaped in a saw tooth form as an example of one of the shapes, is shown in Fig. 3 where an arbor 19 carries supporting wires 20 which inturn support the coiled filament wire at the bends Although the present apparatus has been illustrated in connection with forming bends in coiled filaments, it is obvious that the filamentary material may consist of a straight length of wire or be in ribbon form.

The apparatus illustrated for accomplishingthe objects of the invention, is subject to modifications and changes, and such modifications and changes are considered as being within the scope of the invention as defined by the appended claims.

' What'is claimed is:

i 1. In an apparatus for shaping filamentary material, co-operating rollers adapted to form bends in a filament fed therebetween and means for feeding said filament between said rollers at different points of their engagement to vary the distance between the bends.

2. An apparatus for shaping filamentary material having (to-operating rollers and means for feeding a plurality of spaced fil aments simultaneously therebetween, to cause the distance between said bends in any two of the filaments to be unequal. 3(In anapparatus for shaping metallic filaments, co-operati'ng tapered rollers having protruding dies positioned lengthwise for forming bends in filament lengths fed between said rollers and means for feeding filament thereto at selected points thereon.

4. In an apparatus for shaping filamentary material, col-operating tapered rollers provided with resilient external surfaces and dies carried by said rollers and protruding through the resilient surfaces for -forming bends in filament lengths fed between said rollers, and means for feeding filament thereto at any desired points therealong.

5. In an apparatus for shaping filamentary material, the combination of two tapered co-operating rollers having resilient surfaces and a plurality of slidable members for guiding filament lengths into contact with said rollers at different points along the engaging portions of said rollers.

6. In an apparatus for shaping filamentary material, tapered rollers co-operating to form bends in filament lengths passed therebetween, the distances between the bends in the several filament lengths being dependent upon the points at which they are fed between said rollers'and means for feeding filament thereto at desired points. i

7. In an apparatus for shaping wires, the combination of taperedrollers having line engagement, said rollers having protuding dies for making bends in wire fed therebetween and a scale juxtapositioned to said rollers for indicating distances betwcen bends made in wires inserted at a given calibration.

8. In an apparatus for shaping wires, tapered co-operating rollers, dies carried by said rollers in converging relation for forming bends in wires'fed therebetween transversely of their length and means for feeding wires thereto at desired positions.

9. In an apparatus for bending a filament, the combination of two tapered cooperating rollers, each of said rollers having a rubber covering intercepted at predeter mined intervals by protruding dies positioned lengthwise of the rollers, means for driving said rollers in synchronism, a fila- 2 ment guide slidab-ly mounted on a support and a calibrated scale to indicate distances between bends formed in the. filament fed between said rollers.

10. A machine for bending filamentary material comprising converging shafts geared together, cooperating conical rollers on said shafts and provided with resilient surfaces, dies positioned on said surfaces along elements thereof and uniformly spaced, with the dies on' one roller adapted to engage the surface of the other midway between the dies thereon, whereby the material may be bent alternately in opposite directions.

11. A machine for bending'wire comprising converging shafts arranged tooperate in synchronism, cooperating conical rollers thereon provided with resilient surfaces carrying straight dies arranged at uniform angular distances, the dies on one roller adapted to engage the surface of the other approximately midway between the dies thereon, whereby wire may be bent alternately in opposite directiens and the I distance between bends regulated by passing the wire between the rollers at different pointsalong the length thereof.

12. A wire forming machine comprising cooperating conical rollers rotatively mounted and provided with straight dies on the coniqal surfaces thereof adapted to form bends in wire or the like in opposite directions and uniformly spaced, the distance between bends depending on the location of the wire along the length of the rollers, while the same is being bent, means for guiding the wire to the rollers at a definite location and calibrated means cooperating therewith for indicating the distance between bends on the wire to be formed.

13. A machine for shaping a plurality of wires simultaneously comprising rotatively-mounted, cooperating conical rollers, provided with straight dies spaced uniformly around the perimeter thereof and each adapted to engage the surface of the oppo site roller at points approximately midway between the dies on the other roller, said dies converging toward a point, whereby wires fed between said rollers at different points along the length thereof, are simultaneously bent, when the rollers are operated the distance between the bends in a wire belng uniform, but different from those in other wires.

14. A machine for simultaneously shaping a plurality of filaments comprising conical rollers mounted for cooperative relative rotary motion with substantially line engagement, straight dies mounted on each roller and uniformly spaced therearound, the dies of one roller adapted to engage the surface of the other roller approximately midway bstween dies on said surface, a plurality of filament guides mounted along the length of the rollers whereby a plurality of filaments may be simultaneously fed to and bent when the rollers are operated, the distance between the bends in one wire differing from that in another.

In testimony whereof, I have hereunto subscribed my name this 17 day of June, 1921.

GEORGE BANCROFT ROESCH.

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