US2414288A - Gravity operated clock - Google Patents

Gravity operated clock Download PDF

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Publication number
US2414288A
US2414288A US567628A US56762844A US2414288A US 2414288 A US2414288 A US 2414288A US 567628 A US567628 A US 567628A US 56762844 A US56762844 A US 56762844A US 2414288 A US2414288 A US 2414288A
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US
United States
Prior art keywords
clock
holder
gravity
gravity operated
rack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US567628A
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English (en)
Inventor
Kurowski Juljan Bronislaw De
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Individual
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Individual
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Publication date
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Publication of US2414288A publication Critical patent/US2414288A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00—Producing acoustic time signals by electrical means
    • G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
    • G04C21/20—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm
    • 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
    • G04B23/00—Arrangements producing acoustic signals at preselected times
    • G04B23/02—Alarm clocks
    • 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
    • G04B37/00—Cases
    • G04B37/04—Mounting the clockwork in the case; Shock absorbing mountings
    • G04B37/0481—Mountings relative to wall-clockworks and to pendulums allowing certain movements

Definitions

  • the invention relates to gravity operated clocks, and is concerned with clocks of this kind which are not driven by descending weights suspended from stationary clockwork mechanism but which themselves descend by gravity from an elevated position, with a pinion engaging a fixed, vertical rack and driving the hand by means of suitable trains of gearing.
  • the guidance of the clock is effected by means of a holder generally consisting of a pillar or pillars, the rack itself being if desired formed on a guide pillar, and for accurate time keeping it is important that the path of the clock should be truly vertical, the friction between the rack and pinion being afiected by any deviation from the perpendicular, with resultant change in the rate at which the clock descends.
  • Fig. 1 is a front elevation thereof
  • Fig. 2 a plan view.
  • the clock may be lifted back to the starting position by hand, but this may also be done automatically by a motor device put into operation by the descent of the clock, as will be described hereinafter.
  • the clock may have a balanced pendulum, that is to say a pendulum with a counter bob above the point of oscillation.
  • Fig. 3 shows an alarm device associated with the clock, comprising an electric bell L fed from a battery M.
  • a switch N adapted to be closed by a tappet O on the clockcase, and the switch is adjustable on a vertical post P with hour and minute markings fixed to the gimbal member E and the platform H.
  • Fig. 6 is a diagrammatic view of a motor device for automatically returning the clock to its starting position after its descent by gravity.
  • the clock stand consists of a yoke A on a foot plate B. From the crossbar of the yoke project two lugs C, into which are screwed the pivots supporting the ring D of a gimbal joint. Within the ring the crossbar E of the gimbal joint is mounted on pivots screwed into the ring, and into the bar E are screwed two rods F and G both extending downwards to within a short distance of the footplate B, above which they are screwed into a small floating platform H. The rods F and G constitute the holder carrying the clock. They pass through the casing J of the clock, and serve as guides along winch the clock can move upwards and downwards. On the rod G is formed a rack engaging a ratchet pinion K, which is one of the members of a freewheel clutch driving the clockwork. During the descent of the clock by gravity the clutch is operative, but
  • FIG. 4 An alternative form of alarm device is shown in Fig. 4.
  • a cup Q adjustable on a post P contains pellets R normally retained therein by a pivoted spring loaded shutter S, which is opened a lever T in the course of the descent of the clock, so that some of the pellets drop on to a sounding plate U, oil which they roll into a receptacle V.
  • Fig. 5 shows a pneumatic alarm device.
  • pneumatic cylinder W is adjustable on a post P and has therein a plunger X which can be screwed down by hand to compress air in the cylinder, the air being retained till the tappet 0 opens a valve Y and allows the air to escape and blow a whistle Z.
  • Fig. 6 shows a motor device for automatically restoring the clock to its raised position after descent.
  • a tappet a on the clock there is one arm of a bell crank lever b, the other arm of which has fixed thereto the armature of an electromagnet 0, so that attraction of the armature by the electroma'gnet causes the bell crank lever to act on the tappet and lift the clock.
  • a rod d projecting downwards from the tappet closes an electric switch e in the circuit of the electromagnet when the clock has descended for, say, an hour, so that the path of the clock is quite short, and the lifting movement is of very small amplitude, requiring little expenditure of power.
  • a gravity perated clock comprising in combination a clockstand, a clockcase, clockwork in said clockcase including a pinion adapted by rotation in one direction to drive said clockwork, a holder for said clockcase having a weight memher at its lower end, said clockcase being vertically slidable on said holder, 9. universal joint connecting the upper end of the holder to the clockstand whereby said holder is suspended in constant vertlcei position from said clockstand, and a vertical rack on said holder, engaged with said pinion,

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electric Clocks (AREA)
US567628A 1944-05-31 1944-12-11 Gravity operated clock Expired - Lifetime US2414288A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1045744A GB579555A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1944-05-31 1944-05-31

Publications (1)

Publication Number Publication Date
US2414288A true US2414288A (en) 1947-01-14

Family

ID=32947919

Family Applications (1)

Application Number Title Priority Date Filing Date
US567628A Expired - Lifetime US2414288A (en) 1944-05-31 1944-12-11 Gravity operated clock

Country Status (3)

Country Link
US (1) US2414288A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE458794A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB579555A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
GB579555A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1946-08-07
BE458794A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1945-06-30

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