DE1025988B - Electric lamp, method for attaching the lead wires to the metallic base of a lamp and device for carrying out the method - Google Patents

Description

GERMAN

When producing electric lamps (lightbulbs) they have to go through the closed glass envelope protruding lead wires on the corresponding metallic contact parts of the with the end of the Sheath cemented base are attached. One of these wires is usually on the threaded jacket of the base and is then trimmed by hand. Soldering often proves to be unreliable. In other cases the solder is too bulky and it is not uncommon for solder deposits to remain on undesired surfaces Hang places. These and other reasons make the soldering process undesirable.

It has also been suggested to embed the wire behind the edge of the metal body End to lead freely to the outside and an electric current of such size through this wire end and the To pass metal body that the wire melts solidly on the metal body and tears off its end.

The invention aims to attach one of the lead wires to the metallic lamp cap in such a way that neither soldering nor welding is required and still permanent and sufficient electrical connection of the wire to the socket is achieved.

According to the invention, the end of the lead wire stands through a slot on the edge of the base in front and is wedged in this slot.

According to a preferred method according to the invention for producing such a lamp is A slot is created in the base edge by the lead wire placed under mechanical tension and the wire is clamped in this slot, whereupon the end of the wire protruding from the slot is severed will.

The figures show embodiments of the invention. It shows

Fig. 1 is an elevation of a device according to the invention for attaching a lead wire a lamp base according to the method according to the invention,

Fig. 2 shows the section along line VIII-VIII to Fig. 1, Fig. 3 and 4 parts of Fig. 1 in succession Operating levels,

5 is a diagram showing the simultaneous positions of the essential parts during operation,

FIG. 6 shows an embodiment that differs from FIG. 1,

7 shows a view of a lamp base with a partially broken bulb, 8 shows the section along line XVI-XVI to FIG. 7. In FIGS. 1, 7 and 8, 10 denotes a lamp, which consists of a piston 11 and a cemented, metallic base 13; the base Electric lamp,

Method of attachment

the lead wires to the metallic

Base of a lamp

and facility for implementation

of the procedure

Applicant:

Westinghouse Electric Corporation,
East Pittsburgh, Pa. (V. St. A.)

Representative: Dipl.-Ing. F. Weickmann

and Dr.-Ing. A. Weickmann, patent attorneys,

Munich 2, Brunnstr. 8-9

Claimed priority:
V. St. ν. America from Μίμη = «»! * June 30, 195;

Herman James Eberiel, West Orange, N.J.,

and Frederick Theodore May, Verona, N. J. (V. St. A.), have been named as inventors

is provided with the usual jacket thread. One of the lead wires 16, which is under the designation "Side wire" is known, extends from the inside of the piston 11 into the base and is on this to Making the electrical contact attached. As can be seen from FIGS. 7 and 8, the end of the Wire 16 clamped in a slot 142 on the edge of the base 13. This results in a reliable electrical connection between the wire and the base without soldering or welding.

The process by which the wire 16 is united to the base may prove to be part of the Base cycle on a machine in one of the working positions of the lamp holder head 115 (Fig. 1, 3 and 4) play. In previous positions or steps of the manufacturing process, the base is included united to the piston and cemented; the end piece 16 'of the lead wire 16 is laterally in a certain Angle to the lamp axis in front (Fig. 4) and remains in this position when the lamp holder head passes into the position in which the operation according to the invention takes place. Suppose that the lamp is stationary after all

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according to work processes in one and the same position bolt 135 are regulated such that the outer

of the machine. Slide remains in a predetermined position until

Opposite the lamp there is a mechanism that is operated directly by the inner slide,

which has two clamping legs 117 and 118. These clamp legs 117 and 118 are on the front

Clamping legs approach the lamp on a path 5, the end of which is the nose 123 of the outer slide 121

in the alignment of the fixed at an angle to the lamp axis by a bolt 136; the clamp legs

protruding part 16 'of the wire. The clamps are designed like scissors, i.e. the lower leg

legs have cooperating clamping jaws 117 has a rear, upwards and backwards down

118 'for the purpose of detecting the end part 16' of the inclined part from which a link 137 extends, Wire, when the clamping legs are brought up io the by a bolt 137σ to the front end of the

and begin their backward stroke. An inner slide 122 can be articulated. During the

of the two clamping legs or both for the purpose of intervals in which both the inner and the outer

the grasping of the wire end 16 'be pivotable; are moved in slides at the same time, the oscillates

1 to 5 inclusive, only the lower leg is not off, but merely moves the lower leg 117 oscillatable; the upper leg 118 corresponds to the same movement of the two carriages

merely provides regulation or adjustment. In parallel to itself. But if a sled is a

6, however, both legs are for the purpose of deviating from the movement of the other slide

Detection of the wire end can be pivoted. Makes movement or when a sled is moving,

According to FIGS. 1 to 5, the machine has one while the other is at a standstill, the one mentioned housing 119 protruding upwards, the upper part 20 of which has clamping legs forced around pivot pin 136

a slide track 120 forms. Swing out the longitudinal center line.

this slide track coincides in its direction with. In the embodiment of FIGS. 1 to 5, the leads the direction in which the wire end protrudes, clamping leg 118 only one Bewenn during normal operation the lamp in its correct position to move parallel to itself from; but he can im the housing and the slide track. The 25 angles can be adjusted or set up. To this Slide track is guided by a double slide, namely it is beyond the axis of rotation 136 with a purpose a slide 121 braked by friction is provided by the rearward extending part. This is shorter stroke, in which an inner slide is inclined backwards and downwards and carries itself 122 is from a longer stroke; both carriages are a strut 138 articulated by means of a bolt 139. in the longitudinal direction towards the lamp and from 30 the latter extends upwards at an angle, this guided away displaceably. The front end which is different from the angle of the mentioned one of the outer slide is longer than the inner leg part, and has a slot 140 for the slide open and carries a nose 123, which consists of a terminal nut 141, which passes through the nose 123 housing protrudes and the side edges of which are tapered. Through this gill nut can about the - merge. As can be seen from Fig. 1, the strut 138 of the clamping leg 118 can be adjusted, inner slide 122 behind the outer slide 121 This adjustment of the clamping device to the arranged; the latter has behind the mentioned wire end 16 'protruding at an angle from the lamp Nose a block 124 in the work path that stays forward once done in the movement of the inner slide; this block is unchanged in most cases.

Among other things, a stop to limit the 40 The mode of operation of the device described is the forward movement of the inner slide in FIGS. 1, 3, 4 and 5. When the lamp is in relation to the outer slide. As soon as the inner 10 is moved forward into the position in which the carriage with the mentioned block or stop in mechanism comes into operation, the part 16 'of contact occurs, causing the further movement of the wire 16 against the clamping legs under the forward carriage in this direction the entrainment 45 certain angle, which is the direction of the outer slide. Carriage movement corresponds, directed. At the rear end of the inner slide, ie cam actuation of the arms 128, 129 first the one at the end facing away from the lamp, an inner slide is moved forward as far as the link 125 by means of a bolt 126. That hit block 124; the inner slide leads the free end of the link is connected by a hinge pin 5 ° to the outer slide thanks to an upward arm 128 of one of the action of the friction rail 133 a relative angle lever, the other arm 129 of which moves with respect to the outer Slide out. This is a drive rod 130 in an articulated connection. Relative movement of the inner slide in the latter is synchronized with the indexing outer slide causes a forward movement of the movement of the machine z. B. controlled by cams (not 55 link 137, which has the consequence that the lower drawn). The two-armed lever 128, 129 clamping leg 117 passes into the open position, is at its apex by a hinge 131 on the housing 119 is mounted. The wire end 16 'of the previously mounted lamp. Between the latter and the arm 128 of the two-armed lever that stands upward, as shown in FIG. 10, it falls downwards and is released by the clamping jaws. Once the inner is an adjustable stop 132 that limits the 60 slide against the stop 124 of the outer slide-forward movement of the slide. at least, both carriages move simultaneously. According to the invention, friction is used to ensure that the forward movement is delayed by the clamping limbs for the rest of the time that the movement of the outer carriage is delayed compared to the forward movement exerted by the inner carriage. For this purpose, movement is to be kept open. The clamping jaws of a friction rail 133 opposite a longitudinal side ⁶ 5 118 'are then close to the lamp; the top of the outer slide is provided. This friction jaw lies immediately above the end 16 'of the rail 133 and is pressed against the outer slide by wire 16. The return springs 134' are pressed by cam actuation. The springs are held in the upward gear of the inner slide: because the outer housing is held in place by screw plugs 135. The slide thus held by the friction rail 133, the friction generated by said screws 70 takes place relative to one another between the two

Claims (10)

Carriage instead, which has the result that the lower jaw closes against the upper jaw and the wire 16 ', as shown in FIG. If the lower clamping jaw can no longer close, the restraint of the outer slide caused by friction is overcome when the retraction movement of the inner slide is continued; in other words, both carriages go back with the jaws closed under the tension and retention of the wire between the jaws. The metal base is of sufficiently resilient material that the tensioned wire 16 'creates a slot or gap 142 into which the wire is constrained (FIGS. 7 and 8). After the wire has been bent over the edge of the base and the tension exerted on the wire is exerted backwards in the same direction, the wire is, as it were, hooked into the mentioned gap or slot; as a result, it is tightly connected to the base jacket on the one hand by hooking it in, on the other hand by wedging it in the slot or gap; it is reliably held and ensures a good electrical connection without the use of solder or other connecting materials or work processes. Since the protruding wire end must not remain on the lamp, a mechanism for severing the protruding wire end is provided close to the lamp base. This mechanism consists of a spring knife cutter 143 which is brought up to the wire and cuts it close to the edge of the metal socket, as long as it is under the tension of the reverse gear of the clamping jaws. The cutting device is shown in FIG. 1 at the moment of the cut. 3 shows the position of the cutting device after the cut has been carried out. According to the illustrated embodiment, the cutting knife is exchangeably fastened by a sleeve 144 to the end of a lever 145, which in turn is adjustably supported by a swing arm 146. The latter is attached to a rotary shaft 147 which is driven by a cam or in any other way in synchronism with the movement of the gripping jaw assembly. In the example case, the shaft 147 is mounted in the housing 119 and is set in vibration by a lever 148 which spans the shaft 147 with its forked end. A drive rod 149 acts on the free end of the lever 148 and is influenced in the working cycle by a cam or the like. The cycle is controlled so that cutting of the wire takes place while the wire is kept under tension, immediately after the wire has been tensioned enough to create the slot 142 and to be wedged and hooked therein. The adjusting device of the lever 145 in the swing arm 146 can be designed in different ways. The preferred embodiment uses a sliding interference fit of the lever 145 in the swing arm; the lever 145 is provided at its free end with a head 150, which serves as an end limit and as a parallel guide for the swing arm. An adjusting screw 151 is screwed into the head 150; this threadlessly passes through the swing arm and is held in place by nuts 152 on opposite sides of the swing arm. By turning the screw in one direction or the other, the desired movement of the head 150 towards or away from the rocker arm 146 is produced, the lever 145 sliding in the part 146 and being adjusted so that the wire 16 'passes through the Knife 143 is cut off next to the base of the lamp. It may be appropriate to use a jaw mechanism in which both jaws are driven. An embodiment for this is shown in FIG. 6. The carriages 121 and 122 are essentially the same design as described above. The clamping legs 117 and 118 are again designed like scissors and have a common pivot pin 136 at the end of the nose 123 of the outer slide. The rear ends of the two clamping legs are each equipped with a link 153 in this case. The free. Ends of the two links are anchored by a common pin at the front end of the inner slide 122 so that the clamping legs are opened or pivoted out at the same time when the inner slide executes a forward movement which is different from that of the outer slide and both are closed when the inner slide is moved back relative to the outer slide. The closing of the clamping jaws in turn terminates the period of the return movement of the inner slide relative to the outer slide. The relative forward movement of these two carriages against each other is limited, as described above, by a stop or block. Patent \ r. ",? ~ vi: ™ ·?.: 1. Electric incandescent lamp with a glass bulb and a metallic base with which a lateral lead wire is connected, characterized in that the end of the lead wire through a slot on the edge of the Base protrudes and is wedged in this slot. 2. Electric incandescent lamp according to claim 1, characterized in that the end of the lead wire is hooked into the slot. 3. A method for producing a lamp according to claim 1 or 2, characterized in that A slot is created in the base edge by the lead wire placed under mechanical tension and the wire is clamped in this slot, whereupon the one protruding from the slot Wire end is severed. 4. Device according to claim 3, characterized by clamping legs for gripping and tensioning of the lead wire, means for closing the clamping legs in the gripping position and means to retract the clamping legs in the gripping position for the purpose of tensioning the Wire. 5. Device according to claim 3 and 4, characterized in that the clamping legs to one Carriers are hinged, which for the purpose of moving the clamping legs as a unit in Direction towards the lamp and away from this is displaceable, and that means for opening and Closing one clamping leg opposite the other are provided. 6. Device according to claim 4 and 5, characterized in that the carrier consists of a slide consists, which lies at an angle extending to the axis of the holder of the lamp and moves. 7. Device according to claim 6, characterized in that as a carrier for the clamping legs use a compound or double slide manure finds and that each clamping leg to open and close one of the same opposite the other is connected to another part of the double slide. 8. Device according to claim 7, characterized in that the compound slide has two Has single slide, one of which is subject to a direct drive, during the other is under the action of a friction brake which retards its movement in such a way that the clamping legs are opened and closed by moving the first-mentioned slide are dragged along while the second slide after these movements have been carried out will. 9. Device according to claim 7 and 8, characterized in that the friction brake for the The second-mentioned carriage causes a difference in movement of the two carriages and that a clamping leg so connected to both the first-mentioned and the second-mentioned carriage is that it fades out under the action of the difference in movement. 10. Device according to claim 4 to 9, characterized by means for separating the under Tension held, protruding wire next to the lamp. Considered publications:
German patent specification No. 936 583. 1 sheet of drawings ® 709 909/306 3.58