US1263644A - Apparatus for repairing incandescent electric lamps. - Google Patents

Description

E. CERVENKA. APPARATUS FOR REPAIRING INCANDESCENT ELECTRIC LAMPS.

APPLICATION FILED JULY 2.1914.

Patented Apr. 23,1918.

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i1 OF PARIS, JEANCE.

PATHS FOR BJEPING INCANDESCENT ELECTRIC LAMPS.

Specification of Letters Patent. P gmented Apr. 23, hmlfio Application filed July 2, 1914. Serial No. 848,653.

To all whom it may concern:

Be it known that ll, EMANUEL Cnavnnm, subject of King of Hungary, residing at Paris, 9 Boulevard Bonne-Nouvelle, in the Republic of France, engineer, haveinvented certain new and useful Improvements in Apparatus for Repairing Incandescent Electric Lamps, of which the following is a specification.

This invention relates to apparatus for repairing incandescent electric lamps, and especially those having a metallic filament.

The object of the invention is to provide an apparatus allowing the easy and sure cutting of the bulbs accordin to a plane perpendicular to their axis. or such purpose the apparatus comprises means whereby to make a slight slit or cut at the surface of the bulb, on a circularline, by the action of a cutting tool such as a diamond or other similar matter, and means Whereby to develop such superficial slit or cut,'by the action of heat, in order to obtain a complete separation of both the parts of the bulb in a very sure and neat manner.

One embodiment of this invention is shown by way of example in the accompanyinfi drawings, in which V igure 1 1s an elevation and Fig. 2 a plan of the apparatus according to this invention.

The apparatus shown comprises a base a on which is mounted a vertical rod 6 on which are slidable and rotatory five arms c 01 e f g, which can be set in any'required position by means of screws 0 al e f g.

The lowermost arm 0 serves to support the bulb it while being slit by the cutting tool d. 'Such arm 0 is composed of two parts 0 0 one of which is slidable and rotatory in the other and can be set in any required position by means of a screw 0 The part c terminates in an eyelet c in which can pass freely a bolt 0 which is secured in place by a nut c, the head of such bolt having a hollowed out axial hole to receive the tubular point 723 of the bulb.

The arm at located above the arm 0 serves to car the cutting tool d which consists of a cy indrical rod terminatin in a cutting point. Tn order to allow sue tool to revolve in any direction, a jointed tool is provided, comprising a washer cl secured on the end of the arm at b a nut d and a socket d which is secured to the washer d by a nut at, ed nuts d and d 1mm g screwed on threaded stems which are asso- I the latter is pressed against the cutting tool; Such rest consists of a flat blade and is so mounted as to be able to revolve in a horizontal plane on the lower end of the arm (3 l which is elbowed near the bottom; it can be secured in any desired position by means of a nut 6 such nut being screwed on a threaded extension of the arm e.

The arm fserves to support the bulb it after the latter is slit by the cutting tool cl and while it is subjected to the heat action of the cleaving tool 9 The arm f is similar to the arm 0 and also carries a bolt f", the head of which has a recess to receive the tubular point of the bulb.

he arm 9 supports the heat cleaving tool 9 the latter consists of a piece of matter conductor of heat, which has the shape of a crescent and the inner edge of which is beveled, the radius of the curve of such edge being greater than the radius of the section of the bulb (see Fig. 2). Such tool is socured to an electric heating device comprising a hollow cylindrical body which incloses a heating resistance (not shown) connected to two terminals which are mounted on a plate of insulating matter 9'. that need be done is to connect such terminals to the pole pieces of a suitable source of electricity to allow of the current heating the resistance and hence the cleaving tool g. The body 9 is slidable and rotatory in a split collar 9 and can be set therein, in any required position, by means of a screw such collar is associated with a bolt 9 which passes freely through the end of the arm 9 so as to be enabled to revolve and which can be set by a nut g".

The positlon of the arms 0 a e f g is regulated according to the proportions of the bulbs and the position of the desired section 21. The bulb being placed on the support 0, its point being loosely engaged in the axial hole of such support and 1ts axis being vertical, the tool at and the rest c are so ad justed as to bear against the periphery of the bulb at points not diametrically opposite so as to be able to keep the-bulb against the tool by means of a pressure suitably directed. Then in turning the bulb by hand, there is obtained a slight cut or slit at the surface of such bulb on the circle 2'. Afterward the bulb is put on the support 7*". The

, heat cleaving tool 9 being adjusted in such a manner that its inner ridge lies exact. Y tangent to the circle '5, and being heated to a suitable temperature by the electric current all that need be done is to turn the bulb while holding the same. in contact with the said ridge in order to deepen the superficial cut on the circle '11 to the thickness of the glass under the influence of the local and progressive heating of the latter. There is thus obtained very easily a very clear separation of the bulb on the circle 2', which allows of repairing the said bulb and allows also if desired of soldering the two parts of the bulb together.

By reason of the crescent shape of the tool 9 the position of the bulb pressed against the latter is kept stable although the said bulb only bears against the tool by a single 'sidewise to be cut on the side opposite from 7 ing adjustable in naeacaa that of the cutting tool, all of said arms beependently of each other angularly around the upright and vertically thereon.

2. An apparatus for sectioning the bulb of incandescent lamps comprising the combination of a support, arms adjustably mounted on such support, two bolts of support respectively on two of the said arms, each of such bolts having a cavity therein for the purpose of receiving the point of the bulbs, stripin means on another of the said arms adapted to stripe the glass superficially, and heat cleaving means comprising, a piece of matter conductor of the heat and a heating device for such piece, the said cutting tool and the said piece being placed with regard .to the two sa1d bolts of support respectively at the same height for the purpose of bearing against the same points of the bulbs placed on the bolts.

3. In any apparatus for sectioning the bulbs of incandescent lamps, heat cleaving means comprising a piece of matter which is a good conductor of the heat, having the shape of a crescent, and a heating device for such piece, the inner end of the said piece having a curved radius greater than that of the surface of. the bulbs to be sectioned, and having a transversal section beveled.

In testimony, that I claim the foregoing as my invention I-have signed my name in presence of two subscribing witnesses.

EMANUEL 'OERVENKA.

Witnesses CHAs. P. PREssLY, MAURICE Roux.

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