Patent US3797724A successfully refreshed from Google Patents.
US3797724A
Expired / Lapsed
US
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Soldering appliance
Assignee: KIRSTEN KABELTECHNIK AG
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Filing: 1971-10-18
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Granted: 1974-03-19
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Expires: 1991-10-18
Abstract
Abstract The disclosure relates to a soldering apparatus including a solder receptacle in communication with a pumping zone. A field magnet generates a magnetic field within a pumping zone while a current feed is passed through solder transversely the direction of the magnetic field. The combined action of the magnetic field and the current produces a force in the pumping zone which acts directly on the solder for movement in a given direction. The present apparatus is especially useful for trouble-free soldering of printed circuit boards.
Inventors
- 👤 K Flury
- 👤 R Zitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:35
CPC Classifications
B; B23; B23K; B23K3/00; B23K3/06; B23K3/0646; B23K3/0653; H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/3465; H05K3/3468
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
83 words
A soldering apparatus which comprises in combination, a receptacle having a tank containing solder, a channel in communication with said tank and disposed for circulating the solder, electric means and magnetic means disposed relative said channel for producing a pumping effect on molten solder, said electric means providing an electric field at right angles relative a magNetic field from the magnetic means, said magnetic means having a yoke with free ends, said free ends disposed relative to said channel on opposite sides thereof.
Claim 2
Dependent Claim
83 words
A soldering apparatus which comprises in combination, a receptacle having a tank containing solder, a channel in communication with said tank and disposed for circulating the solder, electric means and magnetic means disposed relative said channel for producing a pumping effect on molten solder, said electric means providing an electric field at right angles relative a magNetic field from the magnetic means, said magnetic means having a yoke with free ends, said free ends disposed relative to said channel on opposite sides thereof.
Claim 3
Dependent Claim
26 words
The soldering apparatus according to claim 1 wherein an iron yoke is included, said iron yoke having free ends extending at least partly into the receptacle.
Claim 4
Dependent Claim
56 words
The soldering apparatus according to claim 2 wherein said iron yoke includes two shanks, one of the shanks of said yoke extending into the tank floor, the other shank thereof extending into the receptacle base below the channel in such a manner that the said channel is located between the two free ends of the yoke.
Claim 5
Dependent Claim
18 words
The soldering apparatus according to claim 1 wherein a phase shifter is included in the magnetic field circuit.
Claim 6
Dependent Claim
20 words
The soldering apparatus according to claim 1 wherein a phase shifter is included in the circuit of the current coil.
Claim 7
Dependent Claim
28 words
The soldering apparatus according to claim 1 wherein means are provided for connecting the apparatus to alternating current of at least two phases whereby optimum pumping is effected.
Claim 8
Dependent Claim
52 words
The soldering apparatus according to claim 1 wherein the receptacle comprises a tank which is open at the top for receiving solder bath and which has a perforated floor, said channel being arranged below the tank floor in communication with the said perforations with nozzles near the open top of the tank.
Claim 9
Dependent Claim
38 words
The soldering apparatus according to claim 1 further comprising a primary coil through which extends a yoke having a U-shape, and supporting the receptacle and through which also extends a magnetic core, provided with a variable air gap.
Claim 10
Dependent Claim
53 words
The soldering apparatus according to claim 8 wherein a secondary conductor surrounds a yoke shank and the magnetic core and forms a hollow body which communicates through the channel with the tank in such a manner that in operation molten solder fills the interior thereof and acts as part of the secondary conductor.
Claim 11
Dependent Claim
51 words
The soldering apparatus according to claim 9 wherein the secondary conductor, which in operation carries molten tin, includes at least two approximately vertical limbs, one of which is cooled, as by cooling fins, in such a manner that a thermosiphon effect causes circulation of the molten solder in the secondary conductor.
Claim 12
Dependent Claim
33 words
The soldering apparatus according to claim 7 wherein the receptacle is provided with at least one barrier disposed to intercept impurities and thus prevent clogging of the channel and the nozzles communicating therewith.
Claim 13
Dependent Claim
37 words
The soldering apparatus according to claim 1 wherein the receptacle is made of a material selected from the group consisting of anodized aluminum, ceramic, magnetically non-conductive material insulated by stove-enameling, and magnetically conductive but electrically insulating material.
Claim 14
Dependent Claim
43 words
The soldering apparatus according to claim 1 further comprising a magnetic yoke and a magnetic core, each of which presents a controllable primary coil, the arrangement being such that the voltages can be tapped from a regulating transformer in a correlatively variable manner.
Claim 15
Dependent Claim
24 words
The soldering apparatus according to claim 1 further comprising an additional heating device disposed to keep the temperature of the molten solder bath constant.
Claim 16
Dependent Claim
44 words
The soldering apparatus according to claim 1 wherein a magnetic core is included with a primary coil and a single-winding secondary coil, said secondary coil having a U-shaped yoke configuration which surrounds the magnetic core and whose shanks are electrically interconnected with the solder.
Claim 17
Dependent Claim
29 words
The soldering apparatus according to claim 7 wherein a slotted nozzle is fed from the channel through apertures spaced along the slot and disposed for developing a flat jet.
Claim 18
Dependent Claim
18 words
The soldering apparatus according to claim 1 wherein permanent magnets are disposed to set up the magnetic field.
Claim 19
Dependent Claim
18 words
The soldering apparatus according to claim 7 wherein nozzles are removable even when the solder bath is molten.
Claim 20
Dependent Claim
32 words
The soldering apparatus according to claim 8 wherein there is arranged between the primary coil and the yoke-core assembly, an air gap for the purpose of cooling, with or without a blower.
Claim 21
Dependent Claim
24 words
The soldering apparatus according to claim 15 wherein the free ends of the yoke present projections whose jacket surfaces are touched by the solder.
Claim 22
Dependent Claim
14 words
The soldering apparatus according to claim 4 wherein the phase shifter is a capacitor.
Claim 23
Dependent Claim
22 words
The soldering apparatus according to claim 21 wherein the capacitor with an associated coil forms a resonant circuit with the main frequency.
Claim 24
Dependent Claim
79 words
The soldering apparatus according to claim 1 wherein the electric components in the form of at least one primary coil are action-connected to the magnetic components in the form of at least one secondary coil, the arrangement being such that the solder bath forms part of the conductor of the secondary coil in such a manner that the conductor pervades the solder-pervading magnetic field at right angles for the purpose of inducing a pumping effect on the molten solder.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |