US2642713A - Clock - Google Patents

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Publication number
US2642713A
US2642713A US101510A US10151049A US2642713A US 2642713 A US2642713 A US 2642713A US 101510 A US101510 A US 101510A US 10151049 A US10151049 A US 10151049A US 2642713 A US2642713 A US 2642713A
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United States
Prior art keywords
disk
shaft
hand
minute
hour
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Expired - Lifetime
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US101510A
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English (en)
Inventor
Leendert Prins
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Individual
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Individual
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Publication of US2642713A publication Critical patent/US2642713A/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/04—Time pieces with invisible drive, e.g. with hands attached to a rotating glass disc

Definitions

  • the present invention relates to clocks and the operating mechanism therefor and is a continuation-in-part of application 645,998 filed February '7, 1946, now abandoned.
  • the invention contemplates the provision of a clock in which there is no apparent visible means for driving the time indicating hands thereof, such as the clock illustrated in Pat. No. Reissue 22,640, granted to me.
  • the clock of that patent is provided with two transparent rotating glass disks, on one of which the minute hand is mounted and on the other of which the hour hand is mounted.
  • the peripheral edges of these disks are provided with gear teeth and the disks are mounted for rotation in a frame between two stationary glass disks.
  • a single preferably transparent glass disk is mounted for rotation in a stationary frame and by which glass disk the minute hand may be driven.
  • This single rotating glass through a train of gears which is readily accessible from the rear and which train of gears is freely suspended on the driving shaft thereof, rotates the hour hand in timed synchronism with the minute hand.
  • the hour hand may be set independently of the minute hand to the exact hour desired. Thereafter the minute hand may be set to the exact minute and since it is connected to the hour hand by the train of gears, the hour hand will be correspondingly moved to the proper position relative to the minute hand.
  • the clock which is the subject matter of the present invention, may be set easily and quickly in a manner not heretofore contemplated or possible with clocks of the prior art.
  • the single rotating disk itself may be omitted and the minute hand connected to the rotating gear which is mounted in the clock frame and masked from view thereby.
  • a rotating shaft is secured at the center of the clock to the minute 55 hand and through the train of gears suspended tion per minute.
  • the hour hand of this modification may in the same manner he set independently of the minute hand and the latter thereafter also set as desired and yet the illusion of a mysterious drive is retained or even heightened.
  • FIG. 1 is a front elevation of a clock according to my invention.
  • Fig. 2 is a side elevation thereof.
  • Fig. 3 is a rear elevation thereof. 7
  • Fig. 4 is a section on the line 4-4 of Fig. 1.
  • Fig. 5 is an exploded view showing the rotating disk and the means for translating motion therefrom to the hour hand.
  • Fig-6 is a perspective view of the member con 7 meeting the driving shaft of the train of gears and the minute hand to the rotating disk, to enlarged scale.
  • Fig. '7 is a. front view of a modification of my invention, omitting the base.
  • Fig. 8 is a section on the line 8-8 of Fig. 7.
  • the clock is mounted on the base ill, which may be made from any suitable material, such as wood, and in the shape illustrated.
  • clock may be operated by any means
  • I have illustrated a conventional electric driving motor l2 which is coupled to a conventional electric outlet by means of the conventional cable [4 and plug [5.
  • the housing l6 of the motor I2 is mounted on the base ID at the rear thereof by any satisfactory means such as the set screws iii.
  • the single rotating glass disk 20, to which reference will be further made and by means of which the clock hands are rotated, is loosely mounted for rotation in the. frame 22, preferably in the form of a ring.
  • the driving motor l2 may be provided with the pinion 24, which has six teeth and makes one revolu- Around the rim of the glass disk 20, I cement thereto the gear ring 26, which has three hundred and sixty teeth out therein.
  • This gear ring 26 meshes with the idler gear 28 which latter in turn meshes with the pinion 24, so that the glass disk 2! is rotated one revolution in one hour by the driving motor I 2.
  • a stationary glass in the front or rear or both may be provided and mounted on the frame in a conventional manner so that they can be swung away from the rotating disk 20 to make it, the hands of the clock and the train of gears accessible to set the clock in the manner which I shall hereinafter describe.
  • I mount the retaining ring 39 therein against the disk 20 in the rear of the clock.
  • I provide preferably three lugs 32, equally spaced around the periphery of the frame, and in each of which lugs an undercut is made.
  • the retaining ring 36 may be resiliently snapped into position to hold the glass disk in place.
  • the frame 22 may be mounted on the base It in any satisfactory manner, as by the spheroids 34, which are designed to enhance the appearance of the clock.
  • the pinion 24 and the idler gear 28 are preferably covered by the plate 36 and the shoulder 38 extending up therefrom against the lower part of the frame 22 and retaining ring and which plate 36 is mounted on the rear of the base'lii as by the screws 40.
  • the minute hand 50 On the threaded finger 45 extending from the member 42 and which finger is provided with the flats 48, I mount the minute hand 50.
  • the minute hand has a hole to receive said threaded portion 46, and said hole is formed with flats to contact the flats 43 so that the minute hand must rotate with the shaft or connecting member 42.
  • the connecting member or driving shaft 42 is tightly secured and frictionally held on the rotating disk 20 so that it is driven thereby.
  • the minute hand can be rotated independently of the glass disk 20 upon overcoming the friction be-' tween said hand and said disk.
  • the hour hand 58 is driven by the glass disk 20, connecting member or shaft 42 and the train of gears, which are suspended in the rear of the preferably transparent glass 20, in the manner which I shall now describe.
  • clock hands may be positioned in front or in back of the rotating glass disk 20, but at any event, they are accessible for setting the clock in the manner that I shall hereinafter describe.
  • a unitary assembly (see Fig. 5) is formed from the hour hand 58, the counterweight 60, the washer 62 and the gear 64, all of which are secured together by any satisfactory means.
  • This assembly is mounted on the intermediate bearing 66 extending from the shaft 68, which shaft is mounted for rotation in the counterweight 70.
  • a driving shaft is formed by the connecting member 42, the pin 12, the bearing 65 and the shaft 68 which are rotated as a single unit by the rotating disk 20.
  • the counterweight 1B is provided with a recessed opening in which the shaft ⁇ 58 is held between the head 14 and the pinion 15 mounted on the shaft 68 and rotatable therewith.
  • I Mounted on the countershaft 18, I provide the pinion 84 which drives the gear 64 and thereby the hour hand 58.
  • the unitary assembly formed by the hour hand 56, its counterweight -60, washer E2 and gear 54 are formed with an interior bore or bushing which is somewhat larger in diameter than the bearing 66 so that the hour hand 58 is thereby mounted on the driving shaft 68 for free rotation thereon.
  • the hour hand 58 is driven by the rotat ing disk 2! ⁇ through the shaft 68 by means of the train of gears just described in timed synchronism with the minute hand 50.
  • the counterweight 10 provides support for the countershaft l8 and is loosely suspended on the driving shaft 68 and will always gravitate into a vertical position thereby retaining the gears of the train thereof and the hands of the clock always in the proper relative position.
  • the smaller counterweight 60 is mountedat the lower end of the hour hand 58 and serves to hold the hour hand in proper position relative to the minute hand.
  • a similar counterweight 86 for the same purpose is provided at the lower end of the minute hand 50.
  • the minute hand is then turned to indicate the forty-five minutes. Turning of the minute hand manually will be independent of the disk 20 upon overcoming friction between the minute hand and the disk. Turning of the minute hand, however, will cause rotation of the hour hand.
  • the minute hand is rotated preferably in a clockwise direction and since it drives the hour hand through the train of gears (not being independent of the hour hand), it (the minute hand) correspondingly moves the hour hand.
  • my clock can be set or reset within a space of a few seconds to indicate any desired time and yet the two hands will always be in true relation to each other.
  • the cone 56 preferably comes to a point which is located at the center of the driving shaft and since it moves very slowly making a complete rotation but once in an hour, its movement also cannot be discerned and the illusion of mystery is further heightened.
  • the minute hand of this modification is preferably somewhat longer than that of the first described embodiment and extends just beyond the frame 22.
  • the minute hand is correspondingly rotated to indicate time and in turn through the train of gears, such as that illustrated in Fig. 5, correspondingly rotates the hour hand as to indicate the hour.
  • This modification is in the same manner set or reset by manually rotating the counterweight id and thereby moving the hour hand 58 to position and then moving the minute hand manually to the selected position.
  • the gear ring 26 of this modification and its connection to the minute hand 55 is masked from view by the frame 22 and by the minute hand itself.
  • a clock comprising a circular ring gear, synchronous motor means for rotating said ring gear, an annular disk fixed to said ring gear for rotation therewith, a minute hand, means for frictionally attaching said minute hand to one side of said disk whereby the minute hand may be rotated independently ofthe disk and ring gear but rotation of the ring gear and disk will cause rotation of said minute hand, an axial shaft mounted for rotation with the minute hand, a weighted member freely suspended from said axial shaft, a pinion on said axial shaft rotating therewith, a gear mounted.
  • An electric clock comprising a base, a frame ring fixed to the base, an annular ring gear rotatably mounted within said frame ring, a synchronous motor within the base, gearing interconnecting said motor with said ring gear to rotate said ring gear one revolution every hour of operation of the synchronous motor, a circular disk having its periphery fixed within said rin gear and rotatable therewith within said frame ring, said disk being formed with an axial through-opening, shaft means extending through said opening in the disk, and comprising a portion projecting to one side of said disk, a minute hand mounted on said portion of said shaft means for rotation therewith and disposed at said'side of said disk, means for frictionally attaching said shaft means to said disk whereby rotation of the ring gear and disk will cause accompanying rotation of said minute hand butpermitting said minute hand to be rotated Without accompanying rotation of said ring gear and disk, a second shaft means coaxial with said first shaft means and fixed with respect thereto,"said second shaft means having
  • A. clock comprising a base, a frame rin fixed to. the base and extending above the. base, an annular ring gear rotatably mounted within the frame ring, a synchronous motor within the base, gearing interconnecting the motor with the ring gear to rotate the ring gear one revolution for every hour of operation of said motor, a circular disk having its periphery fixed within the ring gear and rotatable therewith within said frame ring, said disk being formed with an axial through-opening, a tubular shaft extending through. the opening in the disk, a collar at the rear end of the tubular shaft contacting the rear end of the disk, a portion of the tubular shaft projecting forwardly of the disk and beingformed withv external.
  • a clock of the character described comprising a base, driving means disposed in said base, a single rotatable transparent disk driven by said driving means, an hour hand, and a minute hand, the combination of means for transmitting the rotation of said single disk to both of said hands and for permitting the setting of said hour hand independently of the rotation of said disk, comprising, a minute shaft supported from said disk and rotating therewith, said minute hand being secured thereto whereby said minute hand is rotatable with said disk, an hour hand assembly, including said hour hand, freely suspended from said shaft, a weighted change gear assembly freely suspended from said shaft and driventhereby and engaging said hour hand assembly for driving the same whereby relative rotation of said weighted change gear assembly with respect to said disk will cause rotation of said hour hand with respect to said disk, and a frame ring mounted on said base and surrounding said disk formaintaining the same upright and in operative engagement with said driving means and having flange means overlapping said flange means defining an opening whereby said change gear assembly is accessible for manual rotation
  • a clock of the character described having a base, driving means disposed in said base, and a single upright transparent disk rotatably driven by said driving means, the combination of means for maintaining said disk upright and in operative engagement with said driving means and for causing the motion thereof to be transmitted to both hands of the clock, comprising a frame ring mounted on said base and surrounding said disk, said frame ring having flange means which overlaps the periphery of said disk, a shaft supported in said transparent disk at substantially the center thereof and rotating therewith, said disk and said shaft comprising a drive assembly, an hour hand assembly freely suspended from said shaft, and a change gear assembly freely suspended from said shaft, said hour hand assembly being disposed between said change gear assembly and said disk and including an hour hand and an hour wheel afiixed thereto, and said change gear assembly including a weight in the form of a plate, a cantilevered countershaft mounted at one end in said plate and projecting towards said disk, and a change wheel mounted on said countershaft for rotation with respect to said plate
  • a clock as claimed in claim 18 including means for frictionally securing said minute shaft to said disk to permit rotation thereof with respect to said disk, said minute hand being keyed to said shaft whereby angular adjustment of said minute hand with respect to said disk will cause corresponding movement of said minute shaft and corresponding angular adjustment of said hour hand.
  • a clock of the character described having a base, driving means disposed in said base, and a single upright transparent disk rotatably driven by said driving means, the combination of means for maintaining said disk upright and in operative engagement with said driving means and for causing the motion thereof to be transmitted to both hands of the clock, comprising a frame ring mounted on said base and surrounding said disk, a shaft supported in said transparent disk at substantially the center thereof and rotating therewith, said disk and said shaft comprising a drive assembly, a minute hand secured to and rotating with said drive assembly, an hour hand assembly freely suspended from said shaft, and a change gear assembly freely suspended from said shaft, said hour hand assembly being disposed between saidchange gear assembly and said disk and including an hour hand and an hour wheel affixed thereto, and said change gear assembly including a weight in the form of a plate, a cantilevered countershaft mounted at one end in said plate and projecting towards said disk, and a change wheel mounted on said countershaft for rotation with respect to said plate, said change wheel having a portion engaging said
  • a clock comprising a minute shaft, a minute hand mounted on said minute shaft for rotation therewith, a minute shaft pinion mounted on said minute shaft for rotation therewith, a weighted member freely suspended on said minute shaft, a gear rotatably mounted on the weighted member and meshing with the minute shaft pinion, a second pinion rotatable with said gear, an hour hand freely rotatable on said minute shaft, a gear fixed for rotation with the hour hand on said minute shaft about the axis of the minute shaft and meshing with the second pinion, and a counterweight on the hour hand for counterbalancing the same.
  • said bearing means comprising a transparent disk located between said minute hand and said hour hand, means for frictionally pressing said minute hand against said disk whereby said minute hand will rotate with the disk when the disk is rotated and whereby said minute hand may be rotated independently of said disk, and means for rotating said disk one revolution per hour.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
US101510A 1948-09-10 1949-06-27 Clock Expired - Lifetime US2642713A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR971475T 1948-09-10

Publications (1)

Publication Number Publication Date
US2642713A true US2642713A (en) 1953-06-23

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ID=9513735

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Application Number Title Priority Date Filing Date
US101510A Expired - Lifetime US2642713A (en) 1948-09-10 1949-06-27 Clock

Country Status (6)

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US (1) US2642713A (fr)
BE (1) BE484956A (fr)
CH (1) CH273133A (fr)
DE (1) DE818626C (fr)
FR (1) FR971475A (fr)
NL (1) NL73385C (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2843999A (en) * 1953-11-30 1958-07-22 Rubber Products Inc Electric clock
US3937096A (en) * 1974-12-30 1976-02-10 General Time Corporation Motor system with replaceable output shaft
US4362397A (en) * 1979-10-09 1982-12-07 Klingenberg Hans Ulrich Analog-display timepiece
US20090185457A1 (en) * 2008-01-23 2009-07-23 Sigelmann Rubens A One-movement balanced hands clock
CN116235116A (zh) * 2020-07-30 2023-06-06 蒙特雷布勒盖股份有限公司 交感钟表组件

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL73385C (fr) * 1948-09-10 1953-10-15 Leendert Prins
EP0769733A1 (fr) * 1995-10-18 1997-04-23 P.P.I. Intellectual Properties Ltd. Montre

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US364971A (en) * 1887-03-01 1887-06-14 Street-clock
US1185624A (en) * 1915-10-16 1916-06-06 Stephen Arthur Boylen Mystery-clock.
US1822195A (en) * 1927-08-08 1931-09-08 Baga G M B H Clock
CH155525A (fr) * 1931-05-04 1932-06-30 Jacot Fernand Horloge à cadran transparent.
CH183259A (fr) * 1934-05-12 1936-03-31 Rosa Almondo Pendulette.
US2153004A (en) * 1936-06-18 1939-04-04 Jaeger Ets Ed Clock, so-called mysterious small clock
US2329079A (en) * 1942-04-11 1943-09-07 Westinghouse Electric & Mfg Co Measuring instrument pointer
FR971475A (fr) * 1948-09-10 1951-01-17 Leendert Prins Pendule ou horloge dont l'une des aiguilles est montée sur une plaque entraînée par sa périphérie

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US364971A (en) * 1887-03-01 1887-06-14 Street-clock
US1185624A (en) * 1915-10-16 1916-06-06 Stephen Arthur Boylen Mystery-clock.
US1822195A (en) * 1927-08-08 1931-09-08 Baga G M B H Clock
CH155525A (fr) * 1931-05-04 1932-06-30 Jacot Fernand Horloge à cadran transparent.
CH183259A (fr) * 1934-05-12 1936-03-31 Rosa Almondo Pendulette.
US2153004A (en) * 1936-06-18 1939-04-04 Jaeger Ets Ed Clock, so-called mysterious small clock
US2329079A (en) * 1942-04-11 1943-09-07 Westinghouse Electric & Mfg Co Measuring instrument pointer
FR971475A (fr) * 1948-09-10 1951-01-17 Leendert Prins Pendule ou horloge dont l'une des aiguilles est montée sur une plaque entraînée par sa périphérie
CH273133A (fr) * 1948-09-10 1951-01-31 Leendert Prins Pièce d'horlogerie telle que pendule ou horloge.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2843999A (en) * 1953-11-30 1958-07-22 Rubber Products Inc Electric clock
US3937096A (en) * 1974-12-30 1976-02-10 General Time Corporation Motor system with replaceable output shaft
US4362397A (en) * 1979-10-09 1982-12-07 Klingenberg Hans Ulrich Analog-display timepiece
US20090185457A1 (en) * 2008-01-23 2009-07-23 Sigelmann Rubens A One-movement balanced hands clock
US7643381B2 (en) 2008-01-23 2010-01-05 Sigelmann Rubens A One-movement balanced hands clock
CN116235116A (zh) * 2020-07-30 2023-06-06 蒙特雷布勒盖股份有限公司 交感钟表组件

Also Published As

Publication number Publication date
BE484956A (fr) 1948-10-15
DE818626C (de) 1951-10-25
NL73385C (fr) 1953-10-15
FR971475A (fr) 1951-01-17
CH273133A (fr) 1951-01-31

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