US2530168A - Apparatus for making stems for electrical devices - Google Patents

Apparatus for making stems for electrical devices Download PDF

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Publication number
US2530168A
US2530168A US698914A US69891446A US2530168A US 2530168 A US2530168 A US 2530168A US 698914 A US698914 A US 698914A US 69891446 A US69891446 A US 69891446A US 2530168 A US2530168 A US 2530168A
Authority
US
United States
Prior art keywords
pressing
conveyor
shaft
jaws
stem
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US698914A
Other languages
English (en)
Inventor
Knochel William John
Wiener Charles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE476230D priority Critical patent/BE476230A/xx
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US698914A priority patent/US2530168A/en
Application granted granted Critical
Publication of US2530168A publication Critical patent/US2530168A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/08—Manufacture of mounts or stems
    • H01K3/10—Machines therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/32—Sealing leading-in conductors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/1987—Rotary bodies
    • Y10T74/19874—Mutilated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2102—Adjustable

Definitions

  • This invention relates to stem making and, more particularly, to the prevention of overoxidation of stem leads during manufacture.
  • the principal object of our invention is to facilitate the manufacture of stems, and particularly those with unbeaded Kcvar leads, as well as avoiding shrinkage due to over-oxidation of such leads.
  • Another object of our invention is to reduce the time that such Kovar leads are exposed to oxidizing heat during incorporation in a stem, thereby preventing over-oxidation.
  • a further object of our invention is to avoid over-oxidation of Kovar leads, by speeding up the pressing of stems incorporating the same, and following a first pressing by another a few seconds before the stem-making machine indexes to the next position.
  • 'A still further object of our invention is to improve on the machine formaking stems, and particularly those having unbeaded Kovar leads, by transferring the operating means for the pressing jaws from the Geneva drive shaft cam to a larger cam on the continuous driving Shaft which operates the gear on the Geneva shaft, and adjusting such in position on Asaid drive shaft.
  • An additional object of our invention is to include a second frog on said driving shaft cam, and provide for varying it in position so as to control the time between pressing operations in the manufacture of stems.
  • Figure 1 is aplan of a stem-making machine embodying our invention.
  • Figure 2 is Va fragmentary elevational view of said machine, on a larger scale and with a part in .vertical section.
  • a Figure 3 is a fragmentary horizontal sectional view on the line III- III of Figure 2, in the direction of the arrows.
  • Figure 4 is a fragmentary elevational view, corresponding to Figure 2, but showing a subsequent positionjin which the pressing jaws are together in pressing engagement with positioned stem elements.
  • Figure' is a View, corresponding to Figure 4, but showing a subsequent position in which the jaws have beenwithdrawn from pressing engagement with'a formed stem.
  • Figure 6 is a diagram illustrating the sequence of events in forming a stem in accordance with our invention.
  • Figure '7 is an elevational view of a completed stem.
  • the present invention is concerned with the prevention of over-oxidation of leads for electrical devices, and particularly of unbeaded Kovar leads during stem making.
  • such a second pressing operation is designated to perform two functions:
  • the normal stem machine has been modified.
  • the' pressing time was controlled by'a frog on a small cam that was located on the drive shaft for the Geneva and which, therefore, could only operate shaft which causes the Geneva drive shaft tov
  • the first pressing operation can be controlled from one second after to one second before the indexing takes place.
  • a second pressing operation is caused to occur by the addition of a port I4.
  • the hub l5 of said conveyor carries,
  • a Geneva driven member or star wheel I6 rests on a plate or washer Il, in turn supported on anti-friction means, such as a ball or roller bearing I8.
  • the conveyor carries a plurality of heads I9 having upwardly opening pockets 2l, each carrying a split generally cylindrical plug 22, in each of which may be held leads 23 and 24, and on each of which may be supported a nare tube 25 and an exhaust tube 26.
  • the leads 23 and 24 are made of Kovan or similar cxidizable metal, as they are the kind that we are especially concerned with for the prevention of oxidation.
  • the conveyor I2 is operated by power means such as a motor, or other prime mover 21, having a pulley 28 over which a belt 29 passes to a pulley 3l on a shaft 32, carrying a worm 33 meshing with a gear 34 on a continuous drive shaft 35.
  • Said drive shaft f 35 is mounted for rotation in the table or support I4, and a bracket 3S extending from a portion thereof, as shown most clearly in Figure 2.
  • Said shaft 35 carries a gear 31 which is mutilated by having teeth removed therefrom around a large 1;
  • FMounted above the iinal heat and pressing station 44 are a pair of pressure jaws 45 and t6, pivoted to an arm 41, projecting from the upper portion ofthe standard or shaft i3 about which the conveyor I2 rotates, as indicated at 43 and 49.
  • These jaws are connected to a bracket 5I, by means of links 52 and 53 pivoted respectively to said bracket 5I and bell-crank arms 54 and 55 projecting from the jaws and 4S, respectively.
  • the bracket 5i is carried by a rod 52, reciprocating in the standard I3, and operated by a lever' 5'1- pivoted to the base I4, as indicated at 58, urged upwardlyby an operati-ng spring 5S, and bifucated laterally and vertically at its end to receive said rod 56 and projections 6I on the lower portion thereof.
  • 'I'he lever 51 carries a roller 62 pivoted as indicated at 63, and urged into engagement witlra cam 54 carried on the lower end of the same shaft 35 that drives lthe conveyor I2.
  • The. cam S4 comprises a plate carrying a pair of frogs, 65 and ⁇ SQ, adjustably secured thereto, as by bolts 61 and 68 movable in arcuate slots 69 and -l I., respectiveiy.v
  • the support I4 are several gas pipes. 'I 2.terminating in burner nozzles adapted to provide fires ⁇ 73., '14, 15, and "IB, at preheating stations Il and 78iinal heating and pressing station 44 andannealing and exhaust tube opening station 19.
  • the res at preheating station 'Il are relatively mild, those at station 18 are hotter, while thosev at station 44 are adapted to effect the final heating for softening the glass sufciently forV the pressing operations.
  • the res at station 'i9 are merely sufficient to allow for openin g the exhaust tube and effecting annealing.
  • the conveyor I2 is turned during operation by the drive motor 2, through the chain of gears previously described, the assembled stern parts successively index at stations 'il and i6, where they are sufficiently preheated, and then at station 44 where they are sufficiently softened by res l5.
  • the pressing jaws 45 and 46 move, upon engagement of the frog with the roller 62, causing descent of the rod 56, from the full to the dotted line position illustrated in Figure 2, where they squeeae'the softened flare tube into engagement with the softened exhaust tube about the associated leads.
  • the head carrying the formed stem is moved to the next position, 7S, where the exhaust tube is opened by a Yproperly directed blast ofair from a pipe 83, as shown in Figure l as indicated by the aperture 84 in Figure 7, and the formed stem subjected to the desired anneal ling treatment.
  • This stem is then moved to and indexed at the next station, labeled "discharging, where it may be removed from the machine.
  • Apparatus for making stems for electrical devices comprising means for heating an assembled glass flare, glass exhaust tube, and leads for a relatively short period of time until the glass parts are sufliciently softened for consolidation, and means comprising a power-operated plate carrying a pair of adjustable cam elements for at one location performing all of the following operations: pressing said softened glass parts to consolidate them about said leads, and shortly thereafter repeating the pressing operation.
  • Apparatus for making stems for electrical devices comprising meansl for heating an assembled glass, flare tube, glass exhaust tube, and leads, for about six seconds, in a given position, until they are sufficiently softened for working, and means comprising a power-operated plate carrying a pair of adjustable cam elements for then at one llocation performing all of the following operations: pressing said partsv to consolidate the flare and exhaust tube with respect to said leads, and repeating the pressing operation about eight seconds later, in order to make positive the complete flow of glass around the leads and shape the stem, preventing heavy non-uniform sections of glass from forming.
  • Apparatus for making stems for electrical devices comprising a conveyor, heads thereon for supporting assembled stem parts, means for heating said assembled parts, pressing jaws pivoted adjacent said conveyor to act on said parts after heating, means pivoting conveyor for rotation about a vertical axis, means for intermittently rotating said conveyor about said axis comprising a Geneva star Wheel on said conveyor, a driver therefor, a shaft carrying said driver, a gear on said shaft, a drive shaft for said conveyor, a drive gear mounted on said shaft and mutilated so that it periodically engages and disengages with respect to the gear on said driver-carrying shaft, so that said conveyor is periodically indexed from station to station, a jaw-operating cam device mounted on said drive shaft and provided with adjustable cam elements, an operating arm, means pivoting said arm in cooperative association with said cam device, mechanism for conveying motion from said arm to said jaws, means to normally hold said jaws in open position, and means on said arm engaged by said adjustable cam elements for periodically closing said jaws to rst effect consolidation and then effect shaping of
  • Apparatus for making stems .for electrical devices comprising a conveyor, heads thereon for supporting assembled stem parts, means for heating said parts, pressing jaws pivoted adjacent said conveyor to act on said parts after heating, means pivoting said conveyor for rotation about a vertical axis, means for intermittently rotating said conveyor about said axis comprising a Geneva star wheel on said conveyor, a driver therefor, a shaft carrying said driver, a gear on said shaft, a drive shaft for said conveyor, a drive gear mounted on said shaft and formed so that it periodically engages and disengages with respect to the gear on said driver-carrying shaft, so as to effect desired movement of said conveyor, a jaw-operating cam mounted on said shaft and comprising a plate with a plurality of adjustable frogs secured thereto, an operating arm, means pivoting said arm in cooperative association with said cam, mechanism for conveying motion from said arm to said jaws, resilient means acting on said arm to normally hold said jaws in open position, and a roller pivoted to said arm and periodically engaged by said frog
  • Apparatus for making stems for electrical devices comprising a conveyor, heads thereon for supporting assembled stem parts, means for heating said assembled parts, pressing jaws pivoted adjacent said conveyor to act on said parts after heating, a standard about which said conveyor rotates, a Geneva star wheel carried by said conveyor, a drive shaft, a drive gear mounted on said shaft and mutilated so that it periodically engages and disengages, a gear engageable by said mutilated gear, a shaft carrying said engageable gear, a driver on said shaft for said Geneva star wheel, a jaw-operating cam mounted on said drive shaft and comprising a plate with a plurality of adjustable elements secured thereto, and mechanism for conveying motion from said adjustable elements to said pressing jaws in order to cause them to close, open, and then again close and open with respect to each set of assembled stem parts while the latter are in softened condition.
  • Apparatus for making stems for electrical devices comprising a conveyor, heads thereon for f supporting assembled stem parts, means for heating said assembled parts, pressing jaws pivoted above said conveyor to act on said parts after heating, a standard about which said conveyor rotates, a Geneva star wheel carried by said con'- veyor, a shaft for turning said conveyor, a Geneva star wheel driver mounted on said shaft, a gear mounted on said driver carrying shaft, a drive shaft, a drive gear mounted on said drive shaft and mutilated so that it periodically engages and disengages with respect to said driver-carrying shaft gear, a jaw-operating cam mounted on said drive shaft and comprising a plate with a plurality of adjustable frogs secured thereto, an operating arm, means pivoting said arm in cooperative association with said jaw-operating cam, mechanism for conveying motion from said arm to said pressing jaws, a spring acting on said arm to normally hold said jaws in open position, and a roller carried by said pivoted arm and periodically engaged by said frogs for closing said jaw

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
US698914A 1946-09-24 1946-09-24 Apparatus for making stems for electrical devices Expired - Lifetime US2530168A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE476230D BE476230A (en, 2012) 1946-09-24
US698914A US2530168A (en) 1946-09-24 1946-09-24 Apparatus for making stems for electrical devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US698914A US2530168A (en) 1946-09-24 1946-09-24 Apparatus for making stems for electrical devices

Publications (1)

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US2530168A true US2530168A (en) 1950-11-14

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BE (1) BE476230A (en, 2012)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2836011A (en) * 1956-02-03 1958-05-27 Sylvania Electric Prod Glass envelope forming and sealing apparatus
US2917870A (en) * 1957-05-28 1959-12-22 Gen Electric Pinch seal apparatus
US3956808A (en) * 1973-03-31 1976-05-18 U.S. Philips Corporation Method of manufacturing a tube assembly for electric lamps

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US872530A (en) * 1907-04-18 1907-12-03 George H Meeker Method of sealing metal in glass.
US1338500A (en) * 1916-06-06 1920-04-27 Westinghouse Lamp Co Machine for making incandescent-lamp stems
US1579765A (en) * 1921-05-27 1926-04-06 Westinghouse Lamp Co Method for making stems for tipless lamps
US1640442A (en) * 1923-07-19 1927-08-30 Gen Electric Stem-making machine
US1655141A (en) * 1923-10-09 1928-01-03 Gen Electric Stem-making machine
US1655140A (en) * 1920-07-29 1928-01-03 Gen Electric Stem-making machine
US1741016A (en) * 1925-04-25 1929-12-24 Eisler Electric Corp Stem-making machine for radiotubes and the like

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US872530A (en) * 1907-04-18 1907-12-03 George H Meeker Method of sealing metal in glass.
US1338500A (en) * 1916-06-06 1920-04-27 Westinghouse Lamp Co Machine for making incandescent-lamp stems
US1655140A (en) * 1920-07-29 1928-01-03 Gen Electric Stem-making machine
US1579765A (en) * 1921-05-27 1926-04-06 Westinghouse Lamp Co Method for making stems for tipless lamps
US1640442A (en) * 1923-07-19 1927-08-30 Gen Electric Stem-making machine
US1655141A (en) * 1923-10-09 1928-01-03 Gen Electric Stem-making machine
US1741016A (en) * 1925-04-25 1929-12-24 Eisler Electric Corp Stem-making machine for radiotubes and the like

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2836011A (en) * 1956-02-03 1958-05-27 Sylvania Electric Prod Glass envelope forming and sealing apparatus
US2917870A (en) * 1957-05-28 1959-12-22 Gen Electric Pinch seal apparatus
US3956808A (en) * 1973-03-31 1976-05-18 U.S. Philips Corporation Method of manufacturing a tube assembly for electric lamps

Also Published As

Publication number Publication date
BE476230A (en, 2012)

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