US2032957A - Apparatus for loading sheath wire heating units provided with a sheath - Google Patents

Apparatus for loading sheath wire heating units provided with a sheath Download PDF

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Publication number
US2032957A
US2032957A US751333A US75133334A US2032957A US 2032957 A US2032957 A US 2032957A US 751333 A US751333 A US 751333A US 75133334 A US75133334 A US 75133334A US 2032957 A US2032957 A US 2032957A
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United States
Prior art keywords
sheath
insulating material
screw
lever
chute
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Expired - Lifetime
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US751333A
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English (en)
Inventor
Albert H Simmons
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.)
EDISON GENERAL ELEC APPLIANCE
EDISON GENERAL ELECTRIC APPLIANCE COMPANY Inc
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EDISON GENERAL ELEC APPLIANCE
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Publication date
Priority to BE482705D priority Critical patent/BE482705A/xx
Application filed by EDISON GENERAL ELEC APPLIANCE filed Critical EDISON GENERAL ELEC APPLIANCE
Priority to US751333A priority patent/US2032957A/en
Priority to FR797114D priority patent/FR797114A/fr
Priority to GB30466/35A priority patent/GB446628A/en
Application granted granted Critical
Publication of US2032957A publication Critical patent/US2032957A/en
Priority to US358018A priority patent/US2316683A/en
Priority to FR52102D priority patent/FR52102E/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/16—Rigid-tube cables
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49087—Resistor making with envelope or housing
    • Y10T29/49089—Filling with powdered insulation

Definitions

  • This invention relates to electric heating units
  • This invention has particular application to electric heating units wherein a resistance conductor is encased by a sheath and is embedded in and held in spaced relation with the sheath by means of an electrically insulating, heat refrac-- tory and conducting material, such as powdered magnesium oxide.
  • an electrically insulating, heat refrac-- tory and conducting material such as powdered magnesium oxide.
  • This invention contemplates the provision of improved apparatus for loading a sheath with insulating material so as to embed and hold the resistance conductor in spaced relation with ref 20. erence to the sheath, in a simple, reliable and the ends of the conductor, in proper relation to 30 the sheath, generally in the vertical center line of the sheath. Suitable apparatus is provided for feeding to the sheath the powdered magnesium oxide at a predetermined regulated rate. A centering device is arranged to be inserted in the 351 sheath to hold the portions of the resistance element between the terminals in the center line of the sheath while the sheath is being loaded.
  • the centering device is controlled to move upwardly in the sheath as the sheath is being filled with the insulating material so that the level of theinsulating material is always just below and follows the centering device.
  • a suitable vibratory device is provided for applying to the sheath intermittent impacting blows to settle the insulating material Within the sheath while it is being filled.
  • the vibratory device iscontrolled to move upwardly along the walls of the sheathat a regulated rate so as to apply the blows always substantially at the rising level of 50 the insulating material.
  • the insulating feeding means, centering device and the vibratory device all will be controlled by a single control lever, which is manually operable to start the loading 55' operation, and it is further contemplated that these elements will be automatically controlled to stop the loading operation when the sheath has been filled.
  • Fig. 1 is a vertical side elevation of apparatus for loading a sheathed heatingunit arranged in accordance with this invention
  • Fig. 2' is a view similar to Fig. 1, but showing certain elements of the mechanism in different operative positions
  • Fig. 3 is an enlarged front elevation of a portion of the mechanism shown in Figs. 1 and.2
  • Fig. 4 is a side elevation of the mechanism of Fig. 3
  • Fig. 5 is a sectional view taken through the line 55 of Fig. 3 and looking in the direction of the arrows
  • Fig. 6 is a fragmentary sectional View taken through a portion of the apparatus shown in Fig.
  • Fig. 7 is a fragmentary sectional View taken through the line 'l-'-1 of. Fig. 6 and looking in the direction of the arrows
  • Fig. 8 is a plan View of a vibratory device used in the loading apparatus of Figs. 1 and 2;
  • Fig; 9 is a view similar to Fig. 8, but illustrating certain of the elements of the vibratory device in different operative positions
  • Fig. 10 is 5 an enlarged elevation in section taken through the line l0lfl of Fig. 8 and looking in the direction of the arrows
  • Fig. 11 is an enlarged fragmentary view, mainly in section, of certain portions of the apparatus shown in Figs. 1 and 2
  • Fig. 12 is an enlarged elevation, partly in section, of a portion of the apparatus shown in Figs. 1 and 2; and
  • 13 is an elevation, partly in section, of a sheathed electric heating unit of the type to which this invention is praticularly applicable.
  • this invention has been illustrated in one form as applied to electric heating units of the sheathed type, such as described and claimed in the above-mentioned Abbott Patent No. 1,367,341.
  • a heating unit of this type has been illustrated.
  • the heating unit comprises a helical resistance element In encased by a metallic sheath ll.
  • Suitable terminals l2 are mechanically and electrically connected to the ends of the resistance element ID.
  • the resistance conductor is threaded on the terminals as shown and as fully described in the U. S. Patent No.'1,494,938 to C. C. Abbott, dated May 30, 1924.
  • the resistanceconductor i0 is embedded in and is held in spaced relation with reference to the sheath II by a suitable powdered heat refractory and conducting, electrically insulating material it, 's uch aspowdered magnesium oxide.
  • the magnesiumoxide functions to hold the resistance the lower end of the sheath rests.
  • the plunger element I substantially in the longitudinal center line of the sheath, and to conduct heat from the resistance element to the sheath.
  • the inner ends of the terminals I2 are also embedded in the insulating material I3, as shown, and are insulated from the sheath I I and held in spaced relation with it by means of the powdered insulating material.
  • the apparatus for loading the sheath comprises meansior holding it in an upright position, as shown in Figs. 1, 2, 11 and 12, and for holding the resistance element I0 and its terminals I2 in the positions they should occupy with reference to the walls of the sheath, in this case, in the vertical center line of the sheath.
  • the upper end of the sheath is supported by means of a metallic frame I4 (Figs. 1, 2, 5 and 11).
  • the frame. I4 as shown, is provided with a metallic insert I5 which has a recess I6 provided in it to receive the upper end of the sheath, as more clearly shown in Fig. 11.
  • This insert is detachably secured to the frame in any suitable manner, as by means of set screws (not shown).
  • a pedestal I1 (Fig. 12) which comprises a cylindrical member l8 supported in an upright position and within which is fitted a rod I9 that carries on its upper end a base or bearing 20 for the lower end of the sheath.
  • This member 20 has a curved upper surface upon which or rod I9 is fitted within the cylinder I8 and rests upon a compression spring 20a arranged within the cylinder. This spring biases the sheath upwardly into the recess I6, as shown in Fig. 11.
  • the rod I9 as shown, is passed through a an opening in the base 28 with enough of the rod projecting above to form a centering means for the lower end of the sheath. II. If there is a heating unit of a materially difierentlength to be filled, the base 20 will be provided with a rod I9 of proper length.
  • the terminal I2 at the lower end of the sheath is supported in its central position with reference to the sheath by means of a suitable washer I 2a. (Fig. 12) attached to the terminal.
  • This washer is received in a recess 2
  • the washer I2a. is a solid washer, and therefore, in addition to holding the terminal I2 central of the sheath, functions to close the lower end of the sheath.
  • the upper terminal I2 is secured in fixed relation with reference to the sheath, in this case in the center line of the sheath, by means of a rod 23, tothe lower end of which is attached a hook 24 which is arranged to receive a member 25 of T-shape secured to the upper end of the terminal I2, as shown in Fig. 11.
  • the upper end of the rod 23 is rigidly secured to a retaining member 26.
  • Set screws 21 are provided to secure the rod to the retainer.
  • the retaining member 26, as will be pointed out in greater detail hereinafter is rigidly secured in a stationary position to a rigid portion of the apparatus.
  • the metallic frame I4 is secured to a pair of upright supporting rods 28 which are arranged in parallel spaced relation, as shown in Fig. 3.
  • the rods are rigidly secured at their upper and lower ends in spaced relation. These rods rigidly support the rod retainer 26.
  • the metallic frame I4 is slidably mounted upon the rods 28, the frame I4 being provided with bearings 29 arranged to slide upon the rods.
  • Suitable set screws 30 are provided for holding the frame I4 in its adjusted position on the rods.
  • the frame I4 carries suitable means for feeding the powdered insulating material I3 at a regulated rate to the metallic sheath II while it is supported in its upright position.
  • the frame I4 carries a suitable chute 3
  • the metallic member I5 carried by the frame I4 is provided with a conical bore 32 which terminates in an opening 33 pcsitioned directly above the open upper end of the sheath, as clearly shown in Fig. 11 of the drawings. It is through this bore 32 and opening 33 that the chute feeds into the sheath.
  • the terminal I2 projects through the opening 33 and bore 32 for engagement with the supporting rod 23.
  • the insulating material I3 is fed to the sheath II from a suitable hopper 34 (Figs. 1 and 2). Interposed between the hopper 34 and thechute 3I is a suitable feeding device arranged to feed the insulating material from the hopper into chute at a predetermined regulated rate.
  • the feeding means comprises a suitable conveyor 35 (Figs. 5 and 6).
  • the conveyor as shown, comprises a cylindrical member 36 arranged to rotate on a horizontal axis and provided with a plurality of feeding blades 31 on its outer surface.
  • the member 36 with its blades 31 is arranged to rotate in a cylindrical housing 38 which at its upper left-hand end, as viewed in Fig.
  • the conveyor is arranged to rotate in a counter-clockwise direction, as viewed in Fig. 5, and when thus rotated to engage the powder which is fed to its left-hand end from the hopper 34 and gradually convey it to the right-hand end where the port 48 is located.
  • the angular set of the blades 31 at their right-hand end are straightened out as shown so as to lie substantially parallel with the axis. of rotation of the cylinder 36.
  • the hopper is not set directly over the intake of the cylinder 38, as clearly shown in Figs. 1 and 2. That is, the hopper is located off of the end of the cylinder 38 as shown, and the conduit 39 is given an angular shape to connect the hopper with the conveyor. ually operable shut-off valve 29a (Fig. 5) is provided in this conduit 39.
  • the size of the port 46 communicating with the chute is controlled by means of a slide valve 4
  • the knob 42 is provided with a flange 43 which is received in a recess 44 provided for it in the valve 4I
  • the knob 42 has a screw threaded engagement with the frame I4 so that by adjusting the position of the knob in the frame, the position of the valve is adjusted.
  • the valve as shown clearly in Figs. 5 and 6, is provided with an aperture 45 which registers with the port 4
  • the chute 31 is mounted upon a carriage 46 for movement from its operative posi--' When the hopper is moved from its operative po-- sition to its inoperative position, the carriage 46 will move over to close the port 46.
  • is biased to its inoperative position by means of a compression spring 41 (Figs. 4 and 5) interposed between the feeding cylinder 38 and an abutment 48 carried by the carriage 46.
  • a stop 48a is providedto limit the movement of the abutment 48 from the cylinder.
  • is moved from its inoperative to its operative position against the bias of the spring 41 by means of an operating lever 49 which is mechanically connected to rotate a shaft 50 that is journalled in bearings 56a carried by' the frame 14. Also secured to the shaft 56 is a crank arm 51 which is secured to the carriage 46 by means of a link 52. It will be observed that when the lever 49 is moved in a counterclockwise direction,
  • the chute is locked in the operative position by means of a latch 53 pivotally mounted upon a pin 54 and provided with a detent 55 arranged to engage a pin 56 carried by the carriage 46.
  • the latch 53 is biased by gravity in a clockwise direction, as viewed in Figs. 4 and 5. It will be observed in view of the foregoing that when the lever 49 is operated to move the chute from its inoperative to its operative position, the latch 53 will automatically move to engage the pin 56 to lock the chute in the operative position against theforce of its spring 41.
  • the latch is provided with a finger seat 53a whereby the latch can be manually operated to release the carriage 46.
  • Supported by the frame I4 is a receptacle 56a (Fig; 5) positioned to receive any insulating material that might be in the chute when it is moved to its inoperative position.
  • the conveyor 35 is rotated by an operating shaft 51 mounted in bearings 51a carried by the frame 14. This shaft is driven by a gear 515, which in turn is driven through a clutch 5B.
  • the clutch 58 comprises a driving member 59, and a driven member 60 which is secured to the shaft 51 by means of a set screw 6 I
  • the driving member 59 is provided with a collar 62 (Fig. 6) which is arranged about a reduced portion 63 of the driven member 66, as clearly shown in Figs. 6 and '7.
  • a plurality of substantially semi-circular recesses 64 are provided in the inner wall of the flange 62 at spaced intervals about the periphery of the reduced portion 63.
  • the driven member 60 of the clutch carries a shaft 65 (Figs.
  • the shaft 65 is provided with a portion 6511 (Fig. 7) of substantially semi-circular crosssection received in a semi-circular seat 65b in the member 60, and which is arranged when in the dotted line position shown in Fig. 7 to complete the periphery of the portion 66., However, when the shaft. is moved from this position to its full line position shown in Fig. 7, the semicircular portion 650. will move into one of the recesses 64 provided in the driving member 59, as shown, and thereby mechanically lock the driving and driven members together, whereby the shaft 51 and the conveyor 35 are caused to rotate with the gear 51b.
  • the shaft 65 is controlled by a lever 66 which is arranged to move the shaft between its dotted and full line positions shown in Fig. 7.
  • the position of the lever 66 is controlled by the lever 49.
  • the shaft 50 carries a lever or stop- 61 which is arranged when the lever 49 is in its dotted line position shown in Fig. 1 to engage the lever 66 to hold it in its position shown in Fig. 1 which corresponds to the dotted line position of the lever shown in Fig. '7.
  • the lever 49 is moved from its solid line position in Fig. 1 to its dotted line position inthis figure, that is, its full line position, shown in Figs. 2 and.
  • the stop 61 is moved to disengage the lever 66 which thereupon is permitted to move to its full line position shown in Fig. '7 thereby effecting the engagement of the clutch.
  • the lever 66 is moved to this full line position by means of a compression spring 68.
  • the clutch will be engaged.
  • the stop or lever 61 will be moved to its position shown in this figure so that it will engage the lever 66 and return it to its dotted line position shown in Fig. '7 to thereby disengage the clutch, whereby the conveyor 35 will be instantly disengaged from its driving gear 51.
  • the clutch members are driven by the gear 511) in a counter-clockwise direction, as viewed in Figs. 1, 2 and 4.
  • This driving gear 511) for the clutch is driven by means of a gear 66.
  • the gear 69 is driven by means of a shaft 10 journalled in bearings 16a carried by the frame I4, and which may be extended to drive the corresponding gears 69 of other machines (not shown) which will be identical with the one being described and arranged in a bank with it.
  • is provided.
  • the centralizing device comprises a core 12 (Fig. 11) which is provided on its periphery with a plurality of spaced vertical ribs 13 arranged to engage the inner walls of the sheath and position the core 12- relative to. the sheath; while the spaces between the ribs provide for the
  • the core 12 is provided with a centrallyso that that portion of the coil lying within the spacer is held central with reference to the sheath.
  • the spacer 12' will bedrawn upwardly in the sheath at approximately the same rate that the level of the insulating material within the sheath rises as it is being fed to the sheath so that the succeeding portions of the resistance conductor are held central of the sheath until they are substantially embedded by the insulating material which thereafter will maintain the portions central within the' sheath.
  • the spacer II is drawn upwardly in the tube by means of a tubular member 12a which is secured at its lower end to the spacer and at its upper end to a suitable operating arm 15.
  • the arm- 15, as will be pointed out in greater detail hereinafter, is operated by means of a feed screw 16- which is driven at a constant speed through a suitable gear reduction mechanism 18a.
  • gearing 16a 18 driven by any suitable drivingi means such as an electric motor (not sliown).
  • the tube at its upper end is directly connected to a sleeve 11 which in turn is connected to a yoke 18 carried by the arm by means of spherical members 19.
  • the spherical members 19 are mounted in passageways 88 provided for them in the yoke 18, and are received in semi-circular recesses or seats 8I provided for them in the sleeve 11.
  • the balls 19 are forced into the recesses 8
  • the balls and recesses provide a releasable connection between the yoke 18 and the centralizer 1I so that in the event that the load imposed upon the centralizer attains a predetermined maximum, the centralizer will be released from the yoke.
  • this maximum load may be encountered in case the centralizer becomes wedged or otherwise locked in the sheath II.
  • the tube 120. where it leaves the sheath I I is maintained central with reference to the sheath, that is, is held so that its vertical axis is coincident with the vertical axis of the sheath, by means of a sleeve 83 (Fig. 11) secured to the frame I4.
  • Suitable means are provided for applying to the sheath a plurality of intermittent impacting blows applied always substantially at the rising levelof the insulating material within the sheath, which as previously pointed out, lies just below the position of the centralizer H.
  • the vibrator comprises a U-shaped hammer 84 (Figs. 1, 2, 8, 9, and 11) arranged to embrace the sheath II.
  • the span of the legs of the U as shown in Figs. 8 and 9, is somewhat greater than is the external diameter of the sheath so that when the hammer is rapidly reciprocated or vibrated, the legs will engage opposite sides of the sheath with intermittent impacting blows.
  • the hammer 84 is operated by a rod 85 which is driven by means of any suitable vibrating mechanism 88.
  • the vibrating mechanism has not been illustrated in detail, for any suitable mechanism may be used.
  • the hammer 84; together with its vibrating mechanism 86, are mounted upon a suitable carriage 81 (Figs. 8 and 9) which is provided with bearings 88 slidably received by the upright rods 28.
  • the lever 9I isvmechanically connected to a pair of links- 99 which are connected at one end, as shown, to the levers 98, and at their opposite ends to-the lever 9I- through the medium of a pin 94.
  • This pin is arranged to reciprocate in a slot 95 provided for it in the frame 81.
  • the levers 98 are mechanically connected together at their upper ends by means of a tension spring 96 which functions tobiasthe levers to their positions shown in Fig. 9 and the nut portions 89a and bin their disengaged positions.
  • the yoke 15 supporting the centralizer TI is mechanically connected to the frame 81 to be moved with it by means of la cylinder 91 surroundingv the screw 16.
  • This cylinder at its lower end is rigidlysecured to the frame 81, as shown in Fig. 10,.while its upper end is mechanically connected with the yoke 15, as shown in Fig. 11.
  • the centralizer II is elevated in. the sheath II at the same rate as is the member 84 elevated on the exterior of the sheath.
  • the weights of the centralizer, and its supporting rod 23-, together with those of the vibrator mechanism 86 split nut assembly 89, the tube 91 and the yoke 15 are counterbalanced by m'eans of a weight 91a connected with the yoke 15 by means of a cable 91b, as shown in Figs. 1 and 2. This cable passes over pulleys 91c.
  • the lever 49 is operated-from its position shown in Fig. 1 to its position shown in Figs. 2 and 4 to start the feeding mechanism, and the lever 91 is operated from its position shown in Fig. 9 to its position shown in Fig. 8 to lock the carriage to the screw 18' by means of a lever 98.
  • This lever 98' as shown, is pivotally mounted upon asuitable stud 99 (Figs. 3 and 4) which in turn is carried by the frame I4.
  • the lever 98 is of bell crank form, and, as shown, is fulcrumed to the stud 99 substantially at its apex.
  • One arm 98a of the bell crank 98 is pivotally connected to a parallel bar I88, while the other arm 98b of they lever 98' is connected with a handle I81.
  • the lower end of the parallel bar I88 is pivotally connected to a link I82 which in turn is pivotally connected to an upright rigid standard I83.
  • the arm 98a of the bell crank 98 is not connected directly to the extreme upper end of the parallel. bar I88 but, as shown in the drawings,.is connected to thebar somewhat below its upper end.
  • the parallel bar I09 is 'so arranged that when the handle [0
  • the parallel bar 199 carries on its upper end an adjustable stud 189a to compensate for wear and for slight inaccuracies of manufacture.
  • when the sheath H has been filled with the insulating material, the lever 9
  • is thus automatically operated by means of a cam 94 (Figs. 4, 8 and 9) with which the lever 9! is arranged to become engaged when the frame 81 carrying the vibrator is moved upwardly from its position shown in Fig. 1 to its position shown in Fig. 2 wherein the hammer is substantially at the upper end of the sheath l l.
  • as shown in Figs. 8 and 9, is provided with an extension am which carries an adjustable stud or nut 92 positioned so that when the carriage 81 arrives at its upper position shown in Fig. 2, the stud 92 will engage the cam I94 to break the toggle formed of the links 93, as shown in Fig. 8, whereby these members are drawn together'by means of the tension spring 96 to 00- cupy the positions shown in Fig. 9.
  • This oper ation releases the split nut from the driving screw and thereby releases the centralizing device and the vibratory device.
  • These devices may at the proper time be returned manually to their lower positions shown in Fig. l.
  • the latch 53 is operated to release the chute 3
  • the frame B carries an upright pin I85 (Figs. 3 and 4) which is arranged to engage the latch 58 to release the chute substantially at the same instant of time that the cam !94 engagesthe lever 91 to disengage the split nut from the screw 16 to operate the paralpointed out previously, moves the stop 61 into i such a position that it will engage the lever 66 of the clutch 58 thereby disengaging the driving gear 5Tb from the conveyer 36.
  • the terminals I2 (Fig. 13) will be secured to the resistance conductor ID in the manner previously described, and then: the resistance conductor, together with the terminals, will be threaded through the metallic sheath 1 I.
  • the lower terminal 12 will be provided with a washer l2a which is fitted within the recess 2
  • the upper terminal 12 will be mechanically connected with the rod 23, whereby it is held in the center'line of the sheath.
  • the sheath may be pushed downwardly against the force of the spring 29a to facilitate the connection between the upper terminal and the rod 23.
  • the centralizer II which will have been positioned above the terminal 12 during this operation will then be lowered by hand and at the same'time the vibratory device 88 will be lowered to its position shown in Fig. 1.
  • the lever Hll will be moved from its position shown in Fig. l to its position shown in Fig. 2.
  • This operation will mechanically connect the split nut 89 with the operating screw 16, whereby the vibratory device 86 and centralizing device II will be movedupwardly at a regulated rate by the screw.
  • the lever 49 will be operated to its positions of Figs. 2 and '4 by the bar 199 to effect the engagement of the clutch 58, whereby the feeding device 35 will be operated, and to move the chute 3
  • the chute and lever 49 will be locked in their operative positions of Figs. 2 and 4 by thelatch 53.
  • the lever I8] is released immediately after it has thus been operated to start the feeding operation.- As the level of the insulating material within the sheath rises, the centralizing device H will rise just before it and the vibratory device will be elevated so that the hammer 84 will intermittently apply 'blows to the sheath substantially at the level of the material so as to constantly settle it within the sheath while the sheath is being filled.
  • the cam I04 When the sheath has been filled the cam I04 will engage the lever 9
  • a single machine may be operated as 'hasjust been described or that the machines may be arranged in any suitable numberin a'bank or battery.
  • the shaft 10 driving the feed gear 69 of the various :machines will extend through the batter-y and will 'be operated by a source of power common to all the machines. It .will also be understood that a single source of power will be used to drive all'the vertical screws"! 6 through their gear drives 16a.
  • sheaths within limits may be filled using the same pedestal I 8, 19, etc. However, if the lengths of the units vary widely from that shown, pedestals of different and proper lengths will be .used. Furthermore, sheaths of different diameters may be loaded. To accommodate the machine to sheaths of dif- "ferent diameters it :is merely necessary to replace the 'upper holding member .15 by a similar member provided with a recess 16-01 the proper diam- .eter and to use centralizing parts 12, 12a of proper size.
  • Important features of this invention are the provision :of means for obtaining a steady flow of powder from the hopper .34 to the sheath, a uniform rise of the centralizing device TI and the vibrator 86 so that movement of these members is synchronized with the rate of rise of the level of powder within the tube I I.
  • Another important 'feature is the provision of a single manually operable lever .IM to effect the operation of the machine, and furtherythe automatic stop for the machine when the sheath has been loaded.
  • Apparatus vfor loading sheath wire heating units provided with a sheath, a resistance conductor within the sheath and insulating material within said sheath embeddingssaid resistance conductor comprising means for feeding said insulating material into said sheath, means for regulating the feed of said insulating material into said sheath, guide means within said sheath engaging said resistance element to hold it in fixed spaced relation with said sheath and means for moving said guide means within said sheath at a regulated rate as said sheath is filledwith said insulating material so as to support succeeding portions of said conductor in said spaced relation with said sheath until said portions are embedded by said insulating material.
  • Apparatus for loading sheath wire heating units provided with a sheath, a helical-resistance conductor within said sheath and powdered heat conducting electrically insulating material within said sheath embedding said resistance conductor comprising means for supporting said sheath in an upright position, means for holding the ends of said resistance conductor substantially in the vertical center line of said sheath, means for feeding said powdered insulating material into said sheath, a centralizing guide member within said sheath engaging said helical resistance conductor to hold intermediate portions of said conductor substantially in said center line of said sheath, means for moving said guide member at a uniform predetermined rate from the lower to the upper end of said sheath and means for regulating the feed of said insulating material into said sheath in accordance with the rate of movement of said guide member so that the level of said insulating material in said sheath follows and is maintained at a predetermined position with reference to said guide member.
  • Apparatus for loading sheath wire heating units provided with a sheath, a resistance conducto'r within the sheath and insulating material within said sheath embedding said resistance conductor comprising means for feeding said insulating material into said sheath, meansior regulating the feed of said insulating material into said sheath, guide means Within said sheath engaging said resistance element to hold it in fixed spaced relation with said sheath, means for moving said guide means within said sheath at a regulated rate as said sheath is filled with said insulating material so as to support succeeding portions of said conductor in said spaced relation with said sheath until said portions are embedded by said insulating material, and means imparting intermittent blows to said sheath progressively at a regulated rate along said sheath so as to compact said insulating material as it is added to said sheath.
  • Apparatus for loading sheath wire heating units provided with a sheath, a helical resistance conductor within said sheath and powdered heat conducting electrically insulating material within said sheath embedding said resistance conductor comprising means for supporting said sheath in an upright position, means for holding the ends of said resistance conductor substantially in the vertical center line of said sheath, means for feeding said powdered insulating material into said sheath, a centralizing guide member arranged to be fitted into said sheath so as to hold intermediate portions of said helical resistance conductor substantially in said center line of said sheath, means for moving said guide member at a uniform predetermined rate from the lower to the upper end of said sheath, means for regulating the feed of said insulating material into said sheath so that the level of said insulating material in said sheath follows and is maintained a predetermined distance below said guide member, a vibratory device arranged to intermittently apply impacting blows to the external walls of said sheath so as to settle said insul
  • Apparatus for loading sheath wire heating units provided with a sheath, a helical resistance conductor within said sheath and powdered heat conducting electrically insulating material within said sheath embedding said resistance conductor comprising means for supporting said sheath in an upright position, means for holding the ends of said resistance conductor substantially in the vertical center line of said sheath, means for feeding said powdered insulating material into said sheath, a centralizing guide member arranged to be fitted into said sheath so as to hold intermediate portions of said helical resistance conductor substantially in said center line of said sheath, a screw, means for operating said screw, a nut for operating said guide member arranged to engage said screw so as to be driven thereby and thereby move said guide member within said sheath, and means for engaging and disengaging said nut with said screw.
  • Apparatus for loading sheath wire heating units provided with a sheath, a helical resistance conductor within said sheath and powdered heat conducting electrically insulating material within said sheath embedding said resistance conductor comprising means for supporting said sheath in an upright position, means for holding the ends of said resistance conductor substantially in the vertical center line of said sheath, means for feeding said powdered insulating material into said sheath, a centralizing guide member arranged to be fitted into said sheath so as to hold intermediate portions of said helical resistance conductor substantially in said center line of said sheath, a screw, means for operating said screw, a nut for operating said guide member arranged to engage said screw so as to be driven thereby and thereby move said guide member within said sheath, means for engaging and disengaging said nut with said screw and a mechanical connection between said guide member and said nut arranged to release said member from said nut in the event the load on said member attains a predetermined maximum.
  • Apparatus for loading sheath wire heating units provided with a sheath, a resistance conductor within said sheath and insulating material within said sheath embedding said resistance conductor comprising means for feeding said insulating material into said sheath, means for regulating the feed of said insulating material into said sheath, a vibratory device arranged to impart intermittently impacting blows to said sheath, and means for moving said vibratory device along said sheath at a regulated rate so as to impart said blows always substantially at the level of said insulating material in said sheath while said material is being added to said sheath.
  • Apparatus for loading sheathed wire heating units provided with a sheath, a resistance conductor within said sheath and insulating material within said sheath embedding said resistance conductor comprising means for feeding said insulating-material into said sheath, means for regulating the rate of feed of said insulating material into said sheath, a vibratory device arranged to impart intermittently impacting blows to said sheath, a screw, means for operating said screw, a nut arranged to be driven by said screw, and an operable connection between said nut and said vibratory device whereby the latter is driven by said screw to progressively impart impacting blows along the length of said sheath.
  • Apparatus for loading sheath wire heating units provided with a sheath, a helical resistance conductor within said sheath and powdered heat conducting electrically insulating material within said sheath embedding said resistance conductor comprising means for supporting said sheath in an upright position, means for holding the ends of said resistance conductor substantially in the vertical center line of said sheath, means for intermediate portions of said helical resistance conductor substantially in said center line of said sheath, a vibratory device arranged to apply impacting blows to the exterior walls of said sheath, a screw, means for operating said screw at a uniform rate, a split nut arranged to engage said screw and to be disengaged therefrom, means for engaging and disengaging said nut with said screw, a tubular member surrounding said screw connected to said nut so as to be driven thereby, means connecting said guide member and said tubular member so that said guide member is driven by said nut at a regulated rate in said sheath, and means connecting said vibratory device with said nut
  • Apparatus for loading sheath wire heating units provided with a sheath, a helical resistance conductor within said sheath and powdered heat conducting electrically insulating material within said sheath embedding said resistance conductor comprising means for supporting said sheath substantially in a vertical position, means securing the ends of said resistance conductor substantially in the vertical center line of said sheath, means for supplying said powdered insulating material to said sheath at a regulated rate, a guide member within said sheath arranged to engage said resistance conductor to hold the engaged portion substantially in said vertical center line, a vibratory device arranged to impart impacting blows intermittently to said sheath to compact said insulating material, a driving screw, a split nut arranged to engage and disengage said screw, driving connections between said nut and said guide member and between said nut and said vibratory device so that when said nut engages said screw said members connected with it are driven from the lower tothe upper end of said sheath by said screw, means for driving said
  • Apparatus for loading sheath wire heating units provided with a sheath, a helical resistance conductor within said sheath and powdered heat conducting electrically insulating material within said sheath embedding said resistance conductor comprising means for supporting said sheath substantially in a vertical position, means securing the ends of said resistance conductor substantially in the vertical center line of said sheath, means for supplying said powdered insulating material to said sheath at a regulated rate, a guide member within said sheath arranged to engage a portion of said resistance conductor to hold said portion substantially in said vertical center line, a vibratory device arranged to impart impacting blows intermittently to said sheath to compact said insulating material, a driving screw, a split nut arranged to engage and disengage said screw, a driving connection between said nut and said guide member and between said nut and said vibratory device so that when said nut engages said screw said members connected with it are driven from the lower to the upper end of said sheath by said screw
  • Apparatus'for loading sheath wire heating units provided with a sheath, a helical resistance conductor within said sheath and powdered heat conducting electrically insulating material within said sheath embedding said resistance conductor comprising means for supporting said sheath substantially in a vertical position, means securing the ends of said resistance conductor substantially in the vertical center line of said sheath, a hopper for holding said powdered insulating material, a chute for directing insulating material from said hopper into said sheath, a rotary conveyer between said hopper and said chute for conveying insulating material from said hopper to said chute at a uniform rate, a driving member for operating said conveyer at a substantially uniform rate, a clutch between said conveyer and said driving member, a manually operable lever arranged to effect the engagement of said clutch, a guide member within said sheath arranged to engage said resistance conductor to hold it substantially in said vertical center line, a vibratory device arranged to impart impacting blows intermittently to said she
  • Apparatus for loading sheath Wire heating units provided with a sheath, a helical resistance conductor within said sheath and powdered heat conducting electrically insulating material within said sheath embedding said resistance conductor comprising means, for supporting said sheath in an upright position, means for holding the ends of said resistance conductor subthe lower to the upper end of said sheath, and
  • Apparatus for loading sheath wire heating units provided with a sheath, a resistance conductor within said sheath and powdered heat conducting electrically insulating material within said sheath embedding said resistance conductor comprising means for supporting said sheath in an upright position, a hopper for storing said insulating material, a chute, a passageway between said hopper and said chute, means for feeding insulating material from said hopper to said chute at a regulated rate through said passageway, means mounting said chute for movement from a remote position with reference to said sheath to an operating position with reference to said sheath wherein insulating material fed to said chute is directed into said sheath, means associated with said chute for shutting off the flow of powder from said passageway into said chute when said chute is moved to said remote position and means for moving said chute between said positions.
  • Apparatus for loading sheath wire heating units provided with a sheath, a resistance conductor within said sheath and powdered heat conducting electrically insulating material within said sheath embedding said resistance conductor comprising means for supporting said sheath in an upright position, a hopper for storing said insulating material, a chute, a passageway between said hopper and said chute, means for feeding insulating material from said hopper to said chute at a regulated rate through said passageway, means mounting said chute for movement from a remote position with reference to said sheath and an operating position with reference to said sheath wherein insulating material fed to said chute is directed into said sheath, means associated with said chute for shutting ed the flow of powder fromv said passageway into said chute when said chute is moved to said remote position, means for moving said chute between said positions, a latch for holding said chute in said operating position, a centralizing guide member arranged to be fitted into said sheath so as to engage said resistance conductor and hold said resistance conductor substantially
  • Apparatus for loading sheath wire heating units provided with a sheath, a helical resistance conductor within said sheath and powdered heat conducting electrically insulating material within said sheath embedding said resistance conductor comprising means for supporting said sheath substantially in a vertical position, means securing the ends of said resistance conductor substantially in the vertical center line of said sheath, a hopper for holding said powdered insulating material, a chute for directing insulating material from said hopper into said sheath, a rotary conveyer between said hopper and said chute for conveying insulating material from said hopper to said chute at a uniform rate, a driving member for operating said conveyer at a substantially uniform rate, a clutch between said conveyer and said driving member, a manually operable lever arranged to effect the engagement of said clutch, means mounting said chute for movement from a remote position with reference to said sheath and to an operative position with reference to said sheath wherein insulating material fed to said chute is directed into said she

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  • Baking, Grill, Roasting (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Toys (AREA)
  • Seeds, Soups, And Other Foods (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
US751333A 1934-11-03 1934-11-03 Apparatus for loading sheath wire heating units provided with a sheath Expired - Lifetime US2032957A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE482705D BE482705A (enMihai) 1934-11-03
US751333A US2032957A (en) 1934-11-03 1934-11-03 Apparatus for loading sheath wire heating units provided with a sheath
FR797114D FR797114A (fr) 1934-11-03 1935-10-31 Fabrication d'éléments chauffants
GB30466/35A GB446628A (en) 1934-11-03 1935-11-04 Improvements in apparatus for making electric heating units
US358018A US2316683A (en) 1934-11-03 1940-09-23 Apparatus for loading sheathed wire heating units
FR52102D FR52102E (fr) 1934-11-03 1941-09-19 Fabrication d'éléments chauffants

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US751333A US2032957A (en) 1934-11-03 1934-11-03 Apparatus for loading sheath wire heating units provided with a sheath

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US2032957A true US2032957A (en) 1936-03-03

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US751333A Expired - Lifetime US2032957A (en) 1934-11-03 1934-11-03 Apparatus for loading sheath wire heating units provided with a sheath
US358018A Expired - Lifetime US2316683A (en) 1934-11-03 1940-09-23 Apparatus for loading sheathed wire heating units

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Application Number Title Priority Date Filing Date
US358018A Expired - Lifetime US2316683A (en) 1934-11-03 1940-09-23 Apparatus for loading sheathed wire heating units

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US (2) US2032957A (enMihai)
BE (1) BE482705A (enMihai)
FR (2) FR797114A (enMihai)
GB (1) GB446628A (enMihai)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920430A (en) * 1958-05-12 1960-01-12 Gen Electric Apparatus for loading sheathed wire heating units
US2970415A (en) * 1958-12-10 1961-02-07 Wiegand Co Edwin L Electric heaters
CN114614319A (zh) * 2022-04-18 2022-06-10 深圳市天籁通讯器材有限公司 车载hsd线束胶芯打端子装护套设备

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2614741A (en) * 1949-06-09 1952-10-21 William E Gross Gravity filling machine with pneumatically discharge controlling cutoff
US3508234A (en) * 1967-05-26 1970-04-21 Joe W Snyder Bed wetting alarm and trainer
SE8305218L (sv) * 1983-09-27 1985-03-28 Bulten Kanthal Ab Anordning for fyllning av rorelement
US8175762B2 (en) * 2008-01-23 2012-05-08 The Boeing Company Electrically activated aircraft landing gear control system and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920430A (en) * 1958-05-12 1960-01-12 Gen Electric Apparatus for loading sheathed wire heating units
US2970415A (en) * 1958-12-10 1961-02-07 Wiegand Co Edwin L Electric heaters
CN114614319A (zh) * 2022-04-18 2022-06-10 深圳市天籁通讯器材有限公司 车载hsd线束胶芯打端子装护套设备

Also Published As

Publication number Publication date
US2316683A (en) 1943-04-13
GB446628A (en) 1936-05-04
FR52102E (fr) 1943-08-17
FR797114A (fr) 1936-04-21
BE482705A (enMihai)

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