US3635011A - Elapsed-time indicator - Google Patents

Elapsed-time indicator Download PDF

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Publication number
US3635011A
US3635011A US2899A US3635011DA US3635011A US 3635011 A US3635011 A US 3635011A US 2899 A US2899 A US 2899A US 3635011D A US3635011D A US 3635011DA US 3635011 A US3635011 A US 3635011A
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United States
Prior art keywords
flywheel
plates
movement
casing
gear train
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US2899A
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English (en)
Inventor
Stuart M Pindell Jr
Donald J Johnson
Robert E Fickes
Malcolm R Perry
Wayne K Radcliffe
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MAXIMA TECHNOLOGIES & SYSTEMS Inc
Sanwa Business Credit Corp
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Datcon Instrument Co
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Assigned to FLEET NATIONAL BANK reassignment FLEET NATIONAL BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DATCON INSTRUMENT COMPANY, A PA CORPORATION
Assigned to SANWA BUSINESS CREDIT CORPORATION AS COLLATERAL AGENT reassignment SANWA BUSINESS CREDIT CORPORATION AS COLLATERAL AGENT COLLATERAL ASSIGNMENT OF COPYRIGHTS, PATENTS, TRADEMARKS AND LICENSES Assignors: DATCON INSTRUMENT COMPANY, HALMAR ROBICON GROUP, INC., HIGH VOLTAGE ENGINEERING CORPORATION, HIVEC HOLDINGS, INC.
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Assigned to ABLECO FINANCE LLC, AS COLLATERAL AGENT reassignment ABLECO FINANCE LLC, AS COLLATERAL AGENT SECURITY AGREEMENT Assignors: MAXIMA TECHNOLOGIES, INC.
Assigned to MAXIMA TECHNOLOGIES & SYSTEMS INC. reassignment MAXIMA TECHNOLOGIES & SYSTEMS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HIGH VOLTAGE ENGINEERING CORPORATION
Assigned to GENERAL ELECTRIC CAPITAL CORPORATION reassignment GENERAL ELECTRIC CAPITAL CORPORATION SECURITY AGREEMENT Assignors: MAXIMA TECHNOLOGIES & SYSTEMS, INC.
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F3/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork

Definitions

  • the present invention relates to an elapsed-time indicator and particularly relates to an improved electrically or mechanically actuated running time indicator particularly for use with intermittently operated equipment, machinery or the like to indicate aggregate running time.
  • Elapsed or running time indicators are most often employed with equipment or machinery which is intermittently operated where it is desirable to ascertain the accumulated time of actual operation. For example, it is often desirable to determine the total time that a periodically operated engine, i.e., an automobile engine, has been running, for example, for leasing purposes, maintenance scheduling and the like. The total time that machinery and the like is actually in use plays a direct role in many aspects of intermittently operated equipment utilization.
  • Prior elapsed-time indicators have employed an oscillating balance and escapement of the type used in watchor deck type movements to constrain the rundown of a mainspring driving an output shaft which, in turn, operates a running time indicator or counter.
  • Devices of this type have employed a motor assembly including a solenoid operable to move an armature which impulses a flywheel which, in turn, winds the mainspring.
  • the mainspring drives an output shaft through a gear train under the constraint of the escapement.
  • a pair of contacts are closed to energize the solenoid and again impulse the flywheel thereby rewinding the main spring.
  • this sequential action is repeated for so long as energy is applied to the solenoid.
  • Prior devices of this type have many inherent disadvantages among which are the relatively large number of parts which must be formed, machined, assembled, etc., to form the indicator, the relatively high cost of the indicator due to such large number of parts and the skilled labor required for their assembly, uncertain reliability, their inability for adaptation to certain environments, their relatively inefficient motor assemblies, the lack of capability for ready conversion between electrical and mechanical input thereby limiting their use, and inordinate shock and vibration sensitivity.
  • the present invention provides an improved elapsed-time indicator which minimizes or eliminates the above discussed and other shortcomings of prior indicators of this type and provides various advantages in construction, mode of operation, and result over prior elapsed-time indicators.
  • the present invention provides an elapsed-time indicator having a pair of spaced plates mounting a clockwork movement including a gear train and escapement therebetween. Where an electrical input is provided, an electromagnet and counter are mounted on a baseplate.
  • the electromagnet may be electrically connected, for example, to the ignition circuit or other circuit of the associated machine or the like, which circuit is indicative of the running time thereof,
  • a flywheel which forms a part of the electrical circuit through the indicator, lies in electrical contact with and is impulsed by the armature of the electromagnet to break the electrical contact and to wind a helical mainspring, the latter having opposite ends connected to the flywheel and the baseplate.
  • the run down of the mainspring drives the flywheel shaft through a one-way clutch arrangement and also drives a worm gear connected to the counter.
  • the run down of the mainspring is under the control of the escapement through the gear train.
  • the flywheel completes an electrical circuit with the electromagnet and thereby the latter is energized to impulse the armature and hence the flywheel to again rewind the mainspring whereupon the timing cycle is repeated and continued for such time as electrical energy is applied to the terminals of the indicator.
  • the foregoing clockwork and counter subassembly is shock mounted in a plastic casing and has coil lead springs from the electromagnet to the terminals on the rear face of the casing.
  • one of the shafts of the movement is extended externally of the casing and adapted for connection with the mechanical drive, the motor assembly being omitted in this form.
  • An idler gear may also be provided in the movement whereby, in the mechanical version, either direction of rotation of the mechanical input can be accommodated.
  • the present indicator is formed of a minimum number of parts whereby the cost and labor of producing the same has been significantly reduced in comparison with prior indicators of this type.
  • I 17 parts were required to form an elapsed time indicator of the type identified as Model No. 571 constructed by the Hamilton Watch Company
  • the present indicator requires 54 parts.
  • the two baseplates forming the support structure for the counter, solenoid and movement are each integrally molded of a plastic material consisting of a glass fiber filled nylon with a natural lubricant added, typically molybdenum disulphide.
  • One of the plates is molded to provide the pillar posts, the support brackets for the counter, and openings for the shafts of the movement with the marginal portions about the openings I providing integrally formed bearing surfaces for such shafts.
  • Another aspect of the present invention includes a dynamically balanced and positively locked armature mounted on the electromagnet in a manner providing long wear life and consistent performance throughout the life of the motor. Also, the armature is carried by the motor frame in a manner as to positively lock the arm to the motor assembly thereby resisting shock and vibration as well as to increase the metal to metal interface whereby the magnetic reluctance is minimized. Notwithstanding such positive lock, the return spring for the armature is extremely light and has high resistance to vibration and chatter. Other features of the motor assembly provide a self supporting coil wound directly on the core, the adjacent wire strands being bonded one to the other.
  • the coil size is reduced as compared with electromagnets previously employed in indicators of this type, and this results in a reduction in the length of the magnetic path, as well as providing for lighter mountings.
  • a high coil resistance is provided to reduce the contact current whereby the life of the electrical contacts is substantially increased.
  • a wide voltage range can be impressed on the coil thereby adapting the indicator for use with a wide variety of machines operable at different voltages.
  • the indicator casing and the movement are formed to permit ease of assembly, provide for shock mounting of the movement in the casing, and permit ready electrical connection between the leads to the electromagnet and the terminals mounted on the rear face of the casing.
  • a substantially cylindrical one-piece integrally molded cup-shaped casing having an integrally molded terminal block formed on its rear face is provided.
  • a pair of integrally formed locating pins project inwardly from the rear face of the casing.
  • a pair of openings are formed in the second plate of the movement and a pair of coil lead springs connected to the motor assembly extend through the second plate.
  • Grommets are provided about the locator pins and when the movement is positioned within the case, an annular grommet seats the first plate of the movement against a corresponding shoulder in the casing thus shock insulating the movement from the casing.
  • the locator pins engage through the second plate openings to laterally orient the movement relative to the casing and thereby locate the ends of the lead springs against the terminals at the rear face of the casing. As will be appreciated, the movement can thus be simply dropped into the casing over the locating pins.
  • a bezel is then applied about the opposite end of the casing sealing the dial plate and crystal to the casing.
  • the assembly of the present indicator is further facilitated by the employment of ultrasonic welding techniques whereby the plates of the movement can be welded one to the other with the gear train therebetween and the bezel ultrasonically welded to the casing after the movement has been inserted therein.
  • dimples are formed on the ends of the integrally molded pillar posts of the baseplate.
  • Slightly raised cylindrical projections or energy pads are formed on one side of the other plate adjacent its connection with the ends of the pillar posts.
  • the plastic material at the ends of the posts melts, starting with the dimpled portions thereof.
  • energy to the ultrasonic horn is interrupted, the melted plastic hardens and welds the one plate to the other.
  • the normal connecting means usually providing for connecting the plates of typical clock movements and which include numerous parts requiring machining, assembly, etc., are entirely eliminated.
  • the bezel is then applied about the open end of the casing and ultrasonically sealed thereto to provide a watertight, high-integrity casmg.
  • primary and other objects of the present invention are to provide a low-cost, reliable, and readily and easily assembled elapsed-time indicator: wherein the use of plastics and plastic welding techniques are used extensively throughout the formation of the indicator parts and their assembly whereby a substantial reduction in the number of parts and an increase in the function per part ratio is effected; wherein jewel and other metal to metal bearings in the movement are entirely eliminated through the use of a gear train formed essentially of plastic materials or where jewel bearing may be selectively employed as desired, wherein certain wheels and pinions of the gear train are integrally molded of plastic; having a pair of plates which mount both the gear train and escapement as well as the counter and motor assembly including the electromagnet, flywheel and mainspring when an electrical input is provided; wherein the supports carried by the baseplates for mounting the movement, counter, motor assembly and the like are integrally molded therewith whereby such supports are provided solely by two plates; wherein a plastic molded casing having integrally molded electrical terminals and movement aligning pins is provided; wherein
  • Still other objects of the present invention are to provide a motor assembly for timers and the like including a solenoid with a dynamically balanced armature; an armature which is positively locked to the base frame of the solenoid in a manner providing consistent performance and long wear life; a light return spring for the armature affording vibration and chattering resistant characteristics; and a more effective magnetic path through the solenoid.
  • Related objects of the present invention are to provide a unique bearing structure for shafts in timers and other horological devices wherein conventional jewels, jewel mountings and externally applied lubrication of the bearings as well as the labor involved in assembling and lubricating such jewelled bearings may be entirely eliminated; wherein shafts and bearing plates are formed of a self lubricating plastic material; wherein the wear life and reliability of the present bearing structure is substantially increased in comparison with conventional bearings in like devices; and wherein the bearing structure has increased shock and vibration resistant properties as well as a capability of operation under extreme environmental conditions.
  • FIG. 1 is an exploded perspective view of the various parts comprising the elapsed-time indicator of the present invention with certain of the parts being illustrated in cross section;
  • FIG. 2 is a plan view of the counter and motor subassemblies hereof mounted on the upper plate of the movement;
  • FIG. 3 is a cross-sectional view thereof taken about on lines 3-3 in FIG. 2;
  • FIG. 4 is a plan view of the movement subassembly looking downwardly on the lower mounting plate in FIG. 1;
  • FIG. 5 is a cross-sectional view thereof taken generally about on line 55 in FIG. 4;
  • FIG. 6 is a plan view of the motor subassembly hereof
  • FIG. 7 is a plan view of the motor mount thereof
  • FIG. 8 is a cross-sectional view thereof taken about on line 8-8 in FIG. 7;
  • FIG. 9 is an enlarged fragmentary cross-sectional view of the motor subassembly illustrating the pivotal joint between the armature and the motor frame;
  • FIG. 10 is a plan view of a blank for the armature
  • FIG. 11 is a cross-sectional view of the motor in the motor subassembly taken generally about on line 1lll in FIG. 6;
  • FIG. 12 is a plan view of the rear face of the elapsed-time indicator
  • FIG. 13 is an enlarged cross-sectional view thereof taken generally about on line l3l3 in FIG. 12;
  • FIG. I4 is a plan view of the elapsed-time indicator
  • FIG. 15 is a side elevational view of the movement mounting plates prior to assembly
  • FIG. 16 is a fragmentary cross-sectional view thereof illustrating their assembly by application of an ultrasonic horn and spacer block;
  • FIG. 17 is a fragmentary cross-sectional view of the finally assembled baseplates
  • FIG. 18 is a fragmentary plan view of the lower mounting plate illustrating the bench marks used for visual estimation of the amplitude of the balance wheel excursion during assembly of the indicator.
  • FIG. 19 is a schematic illustration of the electrical circuit for the elapsed-time indicator hereof.
  • FIG. 1 an elapsed-time indicator generally indicated at comprising a cylindrical casing 12, a watchor clock-type movement carried between a pair of movement plates and generally indicated at 14, a counter 16 driven by movement 14, a motor assembly 18 utilized when an electricalinput is provided the indicator and a bezel and dial assembly 20.
  • a generalized description of the overall operation of the indicator is now provided.
  • the indicator is connected in the machine circuit at a pair of terminals 22 disposed on the rear face of casing 12.
  • the running time electrical signal energizes a solenoid 24 via a coil spring lead 26 and the armature 28 of solenoid 24 is impulsed to drive a flywheel 30 against the bias of and thereby wind a mainspring 32 which is connected to flywheel 30.
  • the shaft mounting the fly wheel also mounts a wheel of the clockwork movement. This shaft is coupled to the flywheel through a one-way clutch arrangement and is rotated by the mainspring in a timed fashion through a gear train and escapement assembly to be described.
  • Another shaft is coupled to the movement 14 and mounts a worm gear in driving engagement with counter 16.
  • mainspring 32 runs down and returns flywheel 30 into contact with armature 28, the electrical circuit is again completed and the armature is impulsed to rotate flywheel 30 against the bias of and to again wind mainspring 32.
  • This operation is repeated for so long as the electrical signal indicative of the running time of the associated machine is applied to the indicator and the aggregate running time is digitally displayed by counter 16.
  • the fourth wheel of the movement is replaced with a wheel having an extended shaft attachable to the mechanical rotary input of nearly constant torque.
  • the counter is advanced through the worm gear similarly as before.
  • the movement can be adjusted to accommodate a rotary mechanical input in either direction.
  • Baseplate 36 comprises a circular disc carrying on one face a pair of upstanding brackets 40 for mounting counter 16. Brackets 40 are suitably formed to carry the shaft 41 mounting the graduated dials 42 of counter 16: One of the brackets 40 is extended to mount one end of a second counter shaft 43 while a separate bracket 44 is fonned on plate 36 to mount the opposite end of shaft 43.
  • a plurality of laterally spaced pillar posts 45 preferably five in number, having dimples 46 formed on their ends for reasons described hereinafter.
  • a plurality of slightly raised cylindrical bosses 47 are formed on the upper face of bottom plate 38 at positions in alignment with pillar posts 45 whereby, when plates 36 and 38 are secured one to the other, pillar posts 45 are joined to the plate 38 in a manner to be set forth thereby retaining the movement 14 between plates 36 and 38.
  • Suitable openings are formed through each of plates 36 and 38 for receiving the corresponding ends of the shafts forming a portion of movement 14.
  • the foregoing structure comprising brackets 40 and 44, posts 45, dimples 46, bosses 47 and the openings for the shafts of the movement is formed integrally with the associated plate.
  • the plates are integrally molded of plastic with the brackets 40 and 44, posts 45, dimples 46, and bosses 47 integrally molded with the associated plates.
  • the plastic material may comprise, for example, 30 percent short glass fiber filled 5 percent molybdenum disulphide filled nylon.
  • the counter brackets and pillar posts were formed separately and required separate assembly thereof to the respective plates, such formation and assembly being entirely eliminated herein by use of integrally molded movement plates without loss of function, strength, and reliability of such parts.
  • l-Iairspring 51 is connected at one end to a stud 54 staked to plate 36 (or to a slotted post raised from plate 36, not shown) and is connected at its opposite end to a collet 55 carried on shaft 53.
  • a roller pin 56 is carried by balance wheel 50 and periodically engages within the forked end of a pallet 57 carried on a pallet shaft 58.
  • a guard pin 59 is staked to pallet 57 and cooperates with roller 52 in the usual fashion to insure that the pin 56 and pallet 57 are always in proper relative position.
  • a pair of arms 60 is carried by pallet 57 on opposite sides of its pivotal axis and the arms alternately engage the teeth on an escape wheel 62 carried on an escape wheel shaft 64.
  • Shaft 64 also carries an escape wheel pinion 66 which lies in mesh with the fifth wheel 68 of movement 14, wheel 68 being carried on a shaft 70.
  • Shaft 70 also carries a fifth wheel pinion 72 which lies in mesh with the fourth wheel 74 mounted on a shaft 76.
  • Shaft 76 carries a fourth wheel pinion 78 which lies in mesh with a third wheel 80 carried on a shaft 82.
  • Wheel 80 lies in mesh with gear teeth 83 formed on a shaft 84 which extends through baseplate 36 and carries worm 34 on its upper end.
  • mainspring 32 imparts a torque to the third shaft 82, for example, in the clockwise direction as seen in FIG. 4.
  • the rotation of third wheel 80 is restrained by the escapement through the fourth and fifth wheels 74 and 68 respectively.
  • the mainspring thus also imparts a torque to the balance-hairspring assembly of the escapement to release the movement and provide a timed rotation of third wheel 80 under the bias of mainspring 32.
  • the second wheel shaft 84 in mesh with wheel 80 thus rotates in a timed fashion.
  • the torque imparted to the escape wheel 62 through wheels 68 and 74 from wheel 80 pivots pallet 57 about its axis 58, which, in turn, initially impulses the balance wheel 50 in, for example, a counterclockwise direction as seen in FIG. 4.
  • Escape wheel 62 is also unlocked and rotates until locked by the upper pallet arm 60 as seen in FIG. 4.
  • the balance wheel 50 continues on its counterclockwise oscillatory excursion until the hairspring is wound.
  • the balance wheel 50 then returns in the opposite direction and roller pin 56 engages in the forked end of pallet 57 to impulse the pallet in a counterclockwise direction thereby releasing escape wheel 62.
  • Escape wheel 62 rotates a predetermined distance until locked by the lower pallet arm 60 as seen in FIG. 4.
  • Balance wheel 50 continues on its clockwise oscillatory excursion with pin 56 being impulsed from within the forked end of pallet 57.
  • the balance wheel Upon completing its clockwise oscillatory excursion and winding the hairspring, the balance wheel returns in the opposite counterclockwise direction to engage the pin 56in the forked end of pallet 57 whereby the escape wheel 62 is again released and stepped in a counterclockwise direction until locked by the upper arm 60.
  • the escapement operation continues and the escape wheel rotates unidirectionally thereby permitting continued and unidirectional rotation of third wheel 80 in a timed fashion.
  • staff 84 lying in meshing engagement with third wheel 80, staff 84 is driven in rotation substantially continuously as long as torque is applied to the third arbor 82 by mainspring 32.
  • counter 16 is mounted between brackets 40 and comprises the counter wheels 42 which bear timekeeping indicia about their peripheries in the usual fashion.
  • the counter wheels 42 are driven by a counter wheel 92 which lies in mesh with worm gear 34 carried on the end of the second wheel staff 84.
  • worm gear 34 carried on the end of the second wheel staff 84.
  • each of the shafts 70 and 76, as well as their associated movement wheels, are each integrally molded of plastic.
  • Shafts 82 and 84 are provided with a similar bearing arrangement with reduced and enlarged diameter portions forming an annular shoulder providing the bearing surface with plate 36.
  • This unique bearing assembly thus eliminates the precision jewels, additional mountings and assembly steps normally required in prior clockwork or watch movements. Moreover, external lubrication required in previous clockwork or watch bearing structures is entirely eliminated by the foregoing bearing structure as the plastic materials from which the shafts and plates are formed is selflubricating.
  • third wheel 80 provides, in a manner to be described, the input torque to the escapement and counter drive shaft 84.
  • the shaft 76 is replaced by an elongated shaft as indicated by the dashed lines 101 in FIG. 5 for connection with the mechanical input, and it will be seen that the movement 14 and counter shaft 84 will operate as previously described provided a counterclockwise mechanical input torque operates on elongated shaft 101.
  • the indicator is modified by removing the fifth pinion 72, inserting a fifth idler gear 100 having a pinion 102 in mesh with wheel 74 and a wheel 104 in mesh with wheel 68, and providing a counter drive shaft 84 having a reversely threaded worm 34 at its upper end.
  • idler gear 100 and its associated pinion 102 convert this reverse or clockwise directional input such that the fifth wheel 68 and escape wheel 62 rotate in directions similarly as described previously.
  • the escapement must be torqued in one direction only, and the above modification to the movement gears the escapement to receive a torque in its operable direction.
  • the third wheel 80 rotates counterclockwise and drives the counter drive shaft 84 in a clockwise direction.
  • a reversely threaded worm would then rotate the counter drive wheel 94 in the same direction as previously.
  • the plates 36 and 38 are secured one to the other with the movement retained therebetween through the unique cooperation between formation of the pillar posts 45, dimples 46 and bosses 47 upon alignment of the plates and application of an ultrasonic welding technique.
  • a pair of spacer blocks 106 are inserted between the plates, preferably at diametrically opposite positions about plates 36 and 38.
  • the end of a resonant or ultrasonic horn 108 is then brought to bear against bosses 47. When electrical energy is applied to a sonic converter, the horn is caused to vibrate.
  • the vibrations are transmitted through the bosses (energy pads) 47 and the plate to the dimples 46 and the intense movement between the dimple and plate melts the dimple and the plastic begins to flow.
  • the bottom plate is progressively moved toward the baseplate with the ultrasonic energy being continuously applied until the bottom plate bears against the spacer blocks 104 at which time the plates are located relative to each other in predetermined accurate spaced relation.
  • the ultrasonic horn is then removed and the melted plastic hardens to weld the pillar post to the baseplate thereby forming integral movement plates.
  • Each of the pillar post to plate joints are simultaneously formed by a single horn which contacts each of the energy pads during the welding operation. In this manner, the movement is retained between the plates without employing and assembling the various parts normally required to secure a movement in place.
  • motor assembly 18 is mounted to the outer face of baseplate 36 and applies a substantially continuous torque to third wheel during the time period in which and for so long as the electrical signal is applied to the indicator.
  • the motor assembly 18 comprises a mounting plate 110 having lugs 112 and 114 projecting from opposite ends with lug 114 being undercut as at 116 for purposes as will become clear.
  • Mounting plate 110 is formed of a plastic material, preferably the material hereinbefore specified, and an upstanding post 118 is provided adjacent one edge of plate 110.
  • a pair of stepped openings 120 and 122 are formed through mounting plate 110 and receive stake portions of a motor frame 124.
  • Motor frame 124 comprises a side portion 126, an end portion 128 forming a right angle with side portion 126, and a curved opposite end extension 127 having slotted edges 131.
  • Frame 124 is preferably formed of a ferrous material such as nickel plated ingot iron.
  • a T-slot 127, illustrated in FIG. 11, is formed in the end of side portion 126.
  • An opening 129 is formed through end portion 128 of frame 124 and receives a reduced diameter end portion of a magnetic core 130, frame end portion 128 providing the sole support for the core 130.
  • Core 130 is substantially coextensive with side portion 126 of frame 124 and carries a coil 132, one end of which is turned about post 118 and wound about and preferably soldered to the inner end of coil lead spring 26.
  • the other end of coil 132 connects with frame 124 and is preferably soldered in a slot formed along an edge of side frame portion 126 as indicated at 133.
  • An armature 134 is pivotally mounted in the T-slot 127 of frame 124, and comprises, as seen in FIGS. 6 and 10, a substantially triangularly shaped base 136 carrying an arm section 138 bent intermediate its end portions to form an included obtuse angle with base 136.
  • An electrical contact 137 is provided on the outer end of arm 138.
  • the base 136 of annature 134 is pivotally received within T-slot 127.
  • Shoulders 142 (FIG. 10) are provided on the base 136 and butt the inside face of side frame portion 124 adjacent T-slot 127 when the armature and frame are assembled.
  • a slotted enlargement 140 is formed on the end of the armature base portion 136 for purposes as will become clear.
  • Armature 134 is formed in a manner such that it is dynamically balanced about an axis coincident with its pivotal axis in frame portion 124. Thus, the special orientation of the indicator does not affect the position of the armature relative to the core.
  • the opening through the top of the T-slot and which pivotally receives armature 134 is formed to provide a large area of metal contact when the armature is both spaced from and near core 130 (a residual disc 135 prevents contact and hence sticking between the armature and core).
  • Opposite halves of the walls of the opening in the T-slot are tapered as at 145 such that they lie substantially parallel with the base 136 of ar' mature 134 when the latter is spaced from core 130 as illustrated.
  • the other opposite wall halves 147 are formed to lie substantially parallel to the base 136 of the armature when it lies in the illustrated position. These angled wall portions thus engage the armature in a manner providing greater metal to metal contact at the hinge interface in each position of the armature. The reluctance of the magnetic path in the hinge area is thus reduced thereby providing an efficient primary magnetic path in both the open and closed position of the solenoid.
  • a coil spring 150 is connected at one end to the slotted enlargement 140 or 134 with the opposite end being connected to the slotted extension 127 of frame 124.
  • the spring 150 is preferably formed of phosphor bronze wire. Since the armature 134 is dynamically balanced, spring 150 is very light yet is sufficiently strong as to preclude chattering. Spring 150 also locks the armature 134 to frame 124 by biasing shoulders 142 against the inside face of frame 124.
  • flywheel 30 which, in conjunction with the solenoid, imparts a torque to third wheel 82 so long as electrical energy is applied to motor assembly 18.
  • Flywheel 30 is formed of an electrically conductive material and comprises a hub 160 carrying a pair of diametrically outwardly extending anns, the outer ends of which carry suitably balanced weights 162 and 164.
  • the weighted arm end 164 also carries an electrical contact 144.
  • third arbor 82 extends through baseplate 36 and through the bore in flywheel hub 160, hub 160 and arbor 82 being rotatable relative to one another.
  • the outer end of arbor 82 is splined and is received within the bore of a drive hub 166 superposed over flywheel hub 160.
  • a clutch spring 168 encompasses flywheel hub 160 and drive hub 166 whereby flywheel 30 is free to rotate in one direction and is clutched to drive hub 166 for combined rotation with the flywheel in the opposite direction.
  • a mainspring 32 is provided and comprises a helical spring disposed about a reduced-diameter lower base portion of flywheel hub 160. One end of the spring projects from the helical windings and extends to underlie the end lug 114 of motor mounting plate 110 butting the eyelet 161 exposed by the undercut shoulder 116 thereof.
  • the opposite end of the helically wound mainspring 32 extends adjacent the underside of the flywheel associated with weight 164 and is inserted within a groove formed in the underface of weighted end 164 (FIG.'2).
  • a flat shunt strip 153 having diametrically enlarged centrally apertured ends 157 and 159 electrically connects between flywheel 30 and an eyelet 161 which secures motor mounting plate 110 to plate 36.
  • centrally apertured end 157 underlies the flywheel hub 160 about shaft 82 and centrally apertured end 159 underlies lug 114 about eyelet 161.
  • Flywheel hub 160 is thus in continuous electrical contact with shunt strip 153.
  • Casing 12 (FIGS. 1214) comprises a cup-shaped cylindrical member having a radially outwardly directed flange 200 and an axially extending rim 201 about its open end forming an internal shoulder 202 on which is received the dial 204 and crystal 206 in a manner to be presently set forth.
  • the base 208 of casing 12 carries a pair of inwardly directed locating pins 210 over which are received suitable grommets 212 and which project within corresponding openings formed through bottom plate 38 of the movement when assembled within the casing 12.
  • a boss 214 projects outwardly of the bottom portion 208 of casing 12 and mounts a pair of terminals 22, 22a.
  • Casing 12 is formed of a plastic material and the terminals 22, 22a are integrally molded within boss 214.
  • a pair of openings 216 are formed in boss 214 exposing the inner ends of terminals 22, 22a within casing 12.
  • An annular shoulder 218 is also formed intermediate the ends of casing 12.
  • a mounting ring 220 having an in ternal slot formation 222 is disposed about baseplate 36. This assembly is then dropped within case 12 with coil spring lead line 26, 26a engaging through corresponding aligned openings in the base and bottom plates 36 and 38 respectively, the lower ends of the coil spring lead lines 26, 260 being disposed within openings 216 and bearing against the respective inner ends of terminals 22, 22a.
  • the corresponding openings in the bottom plate 38 are slipped over the grommet carrying locating pins 210 and, in this configuration as seen in FIG. 13, the mounting ring 220 bears on shoulder 218.
  • the grommets 210 in mounting ring 220 provide a shock mounting for the movement within casing 12 and, when the end of the coil spring lead line 26 is electrically connected with one of the motor coil 132, it will be seen that good electrical contact is made while retaining a shock mounting of the movement within the case 12.
  • a cylindrical sleeve 224 is disposed concentrically within casing 12 and bears against the outer side of mounting ring 220.
  • the opposite end of sleeve 224 has an outer annular cutout portion 226 and this, together with the annular shoulder 202 formed on the end of casing 12, receives the marginal flange portion 228 of dial 204.
  • Dial 204 has a pair of diametrical slots, not shown, which register with a pair of corresponding lugs, also not shown, formed on casing 12 such that a slot 230 opening through dial 204 is disposed in overlying registry with counter 16 such that the numerals on the counter wheels may be read through the front face of the dial.
  • a gasket 232 is disposed about flange 228 of dial plate 204 and crystal 206 overlies gasket 232.
  • a bezel 236 having a stepped flange portion 238 is disposed about the outer end of casing 12 with the stepped flange portion bearing against the marginal portions of crystal 206 resiliently clamping it together with the dial 204 against the annular shoulder 202 of casing 12 and the cutout portion 226 of sleeve 224.
  • the bezel 236 and casing 12 are formed of a plastic material and, to facilitate securement of bezel 236 to casing 12, an annular head 231 is provided on the annular face of rim 201.
  • An ultrasonic welding horn is then preferably applied to bezel 236 about its periphery whereby the head 23] is first melted to start the welding process with the portion 238 of bezel 236 being finally ultrasonically welded about the face of rim 201.
  • the weld to a limited extent, also occurs between the bezel and casing along the side of rim 201.
  • the indicator has substantial air and water tight integrity while simultaneously providing a securement between the bezel and casing eliminates a large number of parts, i.e., nuts and the like, and various manufacturing operations heretofore employed to assemble an indicator of this type.
  • other types of bezel to casing connections such as a threaded or detented connection, could be utilized.
  • FIG. 19 there is schematically illustrated an electrical circuit for the elapsed time indicator hereof having terminals 22 and 22a adapted for connection in the electrical circuit of a periodically operated machine, not shown.
  • solenoid 24 is energized by an electrical circuit completed through coil spring 26, motor coil 132 attached at one end to coil spring 26, motor frame 124 connected to the opposite end of motor coil 132, the armature 134 electrically connected through the pivotal joint thereof with the motor frame as previously described, shunt strip 153 and mainspring 32 in parallel, eyelet 161, coil spring 26a and the other terminal 22a.
  • Energization of the solenoid pivots'armature 134 and impulses the flywheel for rotation in a clockwise direction as seen in FIG.
  • flywheel 30 When the solenoid is actuated by the foregoing circuit, armature 134 pivots to strike flywheel 30 with the latter rotating about and relative to third arbor 82 and thereby winding mainspring 32. Simultaneously, electrical contact between the armature 134 and the flywheel is broken and the armature returns (counterclockwise as seen in FIG. 2) under the bias of spring 150 to its normal position with base portion 136 thereof spaced from the solenoid core.
  • flywheel 30 When flywheel 30 reaches the end of its clockwise oscillatory excursion, mainspring 32 is fully wound and drives flywheel 30 in the opposite counterclockwise direction.
  • the clutch spring 168 couples the flywheel 30 to the drive hub 166 as the flywheel is returned to its rest position illustrated in FIG. 2 under the bias of mainspring 32.
  • the elapsed time indicator hereof is also adapted for use with a rotary mechanical input.
  • the motor assembly 18 is omitted and the fourth wheel shaft 76 is replaced by a shaft 101 which is elongated and adapted to extend through a suitable opening formed through the rear wall of the casing.
  • Any suitable connection between the rotary input and the shaft 101 may be provided and may include a one-way clutch arrangement such as that described and illustrated in copending application Ser. No. 670,87] filed Sept. 27, 1967 of common assignee herewith.
  • the action of the movement and counter will be similar as previously described with the motive force for the movement and counter coming from the extended shaft 101 rather than the shaft 82 as in the embodiment employing an electrical input.
  • a plurality of circumferentially spaced benchmarks 252 are integrally formed along the inner face of plate 36 in underlying relation to the peripheral rim of the balance wheel 50.
  • the benchmarks are spaced adjacent the periphery of plate 36 and are equally spaced one from the other about a quarter of the circumference of the balance wheel.
  • An elapsed-time indicator comprising a housing, a pair of mounting plates in spaced substantially parallel relation one with the other and carried within said housing, a timing device and drive assembly therefor including a movement comprised of a gear train and an escapement disposed between said spaced plates, a flywheel pivotally mounted on the side of one of said plates remote from said movement, a counter mounted on said one plate side and coupled to said gear train to indicate running time, means coupling said flywheel to one of the gears of said gear train for driving said gear train and said counter in response to pivotal movement of said flywheel in one direction, said coupling means permitting relative rotation between said flywheel and said one gear in response to pivotal movement of said flywheel in the opposite direction, a mainspring connected at one end to said flywheel for rotation therewith with the other end of said spring being fixed to said indicator, a motor assembly mounted on said one plate side for rotating said flywheel in the opposite direction to wind said spring, said flywheel being pivotable in said one direction under the bias of said spring to drive said one gear through said coupling
  • said motor assembly includes a solenoid, said housing having a rear wall, a pair of terminals carried by said rear wall externally of said housing, and means forming an electrical circuit with said solenoid including a pair of springs extending within said housing and electrically connecting with said terminals.
  • An elapsed-time indicator comprising a housing, a pair of mounting plates in spaced substantially parallel relation one with the other and carried within said housing, a timing device and drive assembly therefor including a movement comprised of a gear train and an escapement disposed between said spaced plates, a flywheel pivotally mounted on the side of one of said plates remote from said movement, a counter mounted on said one plate side and coupled to said gear train to indicate running time, means coupling said flywheel to one of the gears of said gear train for driving said gear train and said counter in response to pivotal movement of said flywheel in one direction, said coupling means permitting relative rotation between said flywheel and said one gear in response to pivotal movement of said flywheel in the opposite direction, a mainspring connected at one end to said flywheel for rotation therewith with the other end of said spring being fixed to said indicator, a motor assembly mounted on said one plate side for rotating said flywheel in the opposite direction to wind said spring, said flywheel being pivotable in said one direction 13. under the bias of said spring to drive said one gear through said coup
  • said flywheel includes a hub, said coupling means including a shaft, a drive member carried by said shaft for rotation therewith and a helically wound clutch spring encompassing said hub and said drive member, said spring being arranged such that the flywheel hub is drivingly connected with said drive member to rotate said shaft in response to pivotal movement of said flywheel in said opposite direction and is free for rotation relative to said drive member in response to rotation of said flywheel in said one direction.
  • a drive assembly subcombination therefor comprising a gear in driving relation to said gear train, a pivotally mounted flywheel, means coupling said flywheel to said gear for driving said gear in response to pivotal movement of said flywheel in one direction, said coupling means permitting relative rotation between said gear and said flywheel in response to pivotal movement of said flywheel in the opposite direction, a helical spring having an axis substantially coincident with the axis of rotation of said fly'wheel, one end of said spring bearing against said flywheel for rotation therewith, the other end of said spring bearing against said device, and means for pivoting said flywheel in the opposite direction to wind said spring, said flywheel being pivoted in said one direction under the bias of said spring to drive said gear through said coupling means.
  • a horological device including a shaft carrying said gear, said flywheel being mounted for rotation about said shaft, said spring being helically wound about said shaft.
  • said flywheel includes a hub
  • said coupling means including a drive member carried by said shaft for rotation therewith and a helically wound clutch spring encompassing said hub and said drive member, said spring being arranged such that the flywheel hub is drivingly connected with said drive member to rotate said shaft in response to pivotal movement of said flywheel in said opposite direction and is free for rotation relative to said drive member in response to rotation of said flywheel in said one direction.
  • said pivoting means includes an electromagnet having an armature pivotable to impulse said flywheel for rotary movement in said opposite direction.
  • time indicia including a counter having a digital display and a drive gear, said gear train including a worm gear in driving relation to said counter drive gear.
  • said motor assembly includes a coil, a magnetizable core surrounded by said coil, means supporting one end of said core and including a frame portion projecting beyond the opposite end of said core, said frame portion having at least one slot, an armature pivotally mounted in said slot and having first and second portions, said first portion lying on one side of said frame portion and overlying said opposite core end, said second armature portion lying on the other side of said frame portion, means retaining said armature on said frame portion, one of the edge portions of said slot lying substantially parallel to the axis of rotation of said armature in said frame portion having first and second angularly related surfaces, the first surface of one edge portion extending from said one frame side to a point intermediate the width of said frame portion, the second surface of said one edge portion extending from adjacent the intermediate point to the other side of said one frame portion, a spring biasing said armature into a first position with the sides of said armature extending through said slot lying substantially response to actuation of the electromagnet
  • said retaining means includes a shoulder on said armature for bearing against said one frame portion side, said spring connecting between said armature first portion and said frame portion biasing said shoulder against said frame portion.
  • each of the opposite edge portions of said slot has first and second angularly related surfaces, the first surface of the other edge portion extending from a point intermediate the width of said frame portion to the other side of said one frame portion, said first surfaces lying substantially parallel one to the other, the second surface of the other edge portion extending from adjacent the associated intermediate point to the one side of said other frame portion, said second surfaces lying substantially parallel one to the other, the sides of said armature in said first position lying substantially flush with said first surfaces and in said second position lying substantially flush with said second surfaces.
  • a bearing assembly comprising a pair of spaced mounting plates, a balance wheel including a balance staff terminating at one end in a reduced diameter stem forming an annular shoulder therewith, at least one of said plates having an opening to receive said stem with said shoulder bearing against the annular marginal portion of said one plate about said opening wherein said one plate is formed of a plastic material having a low coefficient of friction with a natural lubricant additive.
  • a mounting plate subassembly comprising a pair of mounting plates molded of a plastic material, said plates having a plurality of openings formed therein to receive the opposite ends of shafts forming parts of said gear train and escapement, and a plurality of posts unitarily molded on one of said plates and projecting therefrom toward the other of said plates, end portions of said posts being welded to the other of said plates joining the latter one to the other with the gear train and escapement disposed therebetween.
  • a horological device including a pair of bosses unitarily molded on said other plate and projecting from said one plate, said bosses and said posts being correspondingly located about said plates.
  • a horological device including at least one dimple projecting from each of said post end portions to facilitate welding the plates one to the other.
  • a horological device including a pair of bosses unitarily molded on said other plate and projecting away from said one plate, said bosses and said posts being correspondingly located about said plates.
  • An indicator comprising a timing device having a pair of mounting plates joined in spaced relation one from the other, a movement disposed between said mounting plates, an electrically actuated motor assembly carried by one of said plates, time indicating means carried by one of said plates and driven by said movement, a casing for said timing device, means mounting said timing device in said casing including shock-absorbing means insulating said plates from said casing, electriflush with said first surface, said armature being pivotable in cal terminals provided externally of said casing, means electrically connecting said terminals to said motor assembly including a pair of springs, locating means provided within said casing, said motor assembly including a pair of contacts, and means on one of said plates cooperable with said locating means to align said springs with said contacts on said motor assembly.
  • An indicator comprising a timing device having a pair of mounting plates joined in spaced relation one from the other, a movement disposed between said mounting plates, an electrically actuated motor assembly carried by one of said plates, time indicating means carried by one of said plates and driven by said movement, a casing for said timing device, means mounting said timing device in said casing including shock-absorbing means insulating said plates from said casing, electrical terminals provided externally of said casing, means electrically connecting said terminals to said motor assembly including a pair of springs, said casing being formed of a plastic material, said casing having an integrally molded boss projecting from one side thereof, said terminals including flat metal strips molded integrally with said boss and having an externally exposed portion, said boss having a pair of recesses opening within said casing and exposing respective inner portions of said terminals to the interior of said casing, and the ends of said springs being received within associated recesses to engage and make electrical contact with said inner portions of said terminals.
  • An indicator comprising a timing device having a pair of mounting plates joined in spaced relation one from the other, a movement disposed between said mounting plates, an electrically actuated motor assembly carried by one of said plates, time indicating means carried by one of said plates and driven by said movement, a casing for said timing device, means mounting said timing device in said casing including shock-absorbing means insulating said plates from said casing, electrical terminals provided externally of said casing, means electrically connecting said terminals to said motor assembly including a pair of springs, said casing being closed at one end and open at its opposite end and having an internal shoulder intermediate its ends, said terminals being located adjacent said closed end with said springs engaging at one end against said terminals and projecting inwardly of said casing toward said open casing end, said motor assembly including a pair of contacts, the opposite ends of said springs bearing against said contacts, said mounting means including a cushion disposed about one of said plates and engaging against said shoulder, and means clamping said cushion against said shoulder to retain said plates within said casing and including means closing
  • An elapsed-time indicator comprising a generally cylindrical housing, a pair of mounting plates in spaced substantially parallel relation one with the other and carried within said housing, said plates being disposed generally normal to the axis of said cylindrical housing, a timing device and drive assembly therefor including a movement comprised of a gear train and an escapement disposed between said spaced plates, a flywheel pivotally mounted on the side of one of said plates remote from said movement, a counter mounted on the side of said one plate remote from said movement and coupled to said gear train to indicate running time, means coupling said flywheel to one of the gears of said gear train for driving said gear train and said counter in response to pivotal movement of said flywheel in one direction, said coupling means permitting relative rotation between said flywheel and said one gear in response to pivotal movement of said flywheel in the opposite direction, a mainspring connected at one end of said flywheel for rotation therewith with the other end of said spring being fixed to said indicator, a motor assembly mounted on the side of said one plate remote from said movement for rotating said flywheel in the
  • An elapsed-time indicator comprising a generally cylindrical housing, a pair of mounting plates in spaced substantially parallel relation one with the other and carried within said housing, said plates being disposed generally normal to the axis of said cylindrical housing, a timing device and drive assembly therefor including a movement comprised of a gear train and an escapement disposed between said spaced plates, a flywheel pivotally mounted on the side of one of said plates remote from said movement, a counter mounted on the side of said one plate remote from said movement and coupled to said gear train to indicate running time, means coupling said flywheel to one of the gears of said gear train for driving said gear train and said counter in response to pivotal movement of said flywheel in one direction, said coupling means permitting relative rotation between said flywheel and said one gear in response to pivotal movement of said flywheel in the opposite direction, a mainspring connected at one end to the flywheel for rotation therewith with the other end of said spring being fixed to said indicator, a motor assembly mounted on the side of said one plate remote from said movement for rotating said flywheel in the
  • said indicia bearing members include a plurality of wheels each carrying a plurality of digits, said coupling means including a counterdrive gear and a worm gear coupled to said gear train and in driving relation to said counterdrive gear.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
US2899A 1970-01-14 1970-01-14 Elapsed-time indicator Expired - Lifetime US3635011A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US289970A 1970-01-14 1970-01-14

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US3635011A true US3635011A (en) 1972-01-18

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US2899A Expired - Lifetime US3635011A (en) 1970-01-14 1970-01-14 Elapsed-time indicator

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US (1) US3635011A (enrdf_load_stackoverflow)
DE (1) DE2101626A1 (enrdf_load_stackoverflow)
FR (1) FR2076082A1 (enrdf_load_stackoverflow)
GB (1) GB1324382A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712044A (en) * 1970-11-06 1973-01-23 Inghams Gmbh Fa Geb Electric clock mounting and contact apparatus
US5602803A (en) * 1995-08-11 1997-02-11 Chaut; Yaron Clocks with unique time displays
US20110080811A1 (en) * 2009-10-05 2011-04-07 Daniel Moeder Handless time display
US9836027B2 (en) 2013-04-10 2017-12-05 The Swatch Group Research And Development Ltd Winding device for self-winding automatic watch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH706361B1 (fr) * 2012-04-13 2017-05-15 Swatch Group Res & Dev Ltd Dispositif de remontage de montre à remontage automatique et montre associée.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873572A (en) * 1955-02-11 1959-02-17 Hamilton Watch Co Motor-driven clock
US3011305A (en) * 1958-07-16 1961-12-05 Hamilton Watch Co Indexing mechanism
US3221120A (en) * 1964-01-31 1965-11-30 Motorola Inc Electromechanical frequency responsive translating device
US3418802A (en) * 1966-04-04 1968-12-31 Stewart Warner Corp Hour meter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873572A (en) * 1955-02-11 1959-02-17 Hamilton Watch Co Motor-driven clock
US3011305A (en) * 1958-07-16 1961-12-05 Hamilton Watch Co Indexing mechanism
US3221120A (en) * 1964-01-31 1965-11-30 Motorola Inc Electromechanical frequency responsive translating device
US3418802A (en) * 1966-04-04 1968-12-31 Stewart Warner Corp Hour meter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712044A (en) * 1970-11-06 1973-01-23 Inghams Gmbh Fa Geb Electric clock mounting and contact apparatus
US5602803A (en) * 1995-08-11 1997-02-11 Chaut; Yaron Clocks with unique time displays
US20110080811A1 (en) * 2009-10-05 2011-04-07 Daniel Moeder Handless time display
US7961561B2 (en) * 2009-10-05 2011-06-14 Daniel Charles Moeder Handless time display
US9836027B2 (en) 2013-04-10 2017-12-05 The Swatch Group Research And Development Ltd Winding device for self-winding automatic watch

Also Published As

Publication number Publication date
DE2101626A1 (de) 1972-07-27
FR2076082B1 (enrdf_load_stackoverflow) 1973-08-10
GB1324382A (en) 1973-07-25
FR2076082A1 (fr) 1971-10-15

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