GB1190503A - Electric Clock Alarm System Including an Electromagnetic Vibrator. - Google Patents

Electric Clock Alarm System Including an Electromagnetic Vibrator.

Info

Publication number
GB1190503A
GB1190503A GB1998968A GB1998968A GB1190503A GB 1190503 A GB1190503 A GB 1190503A GB 1998968 A GB1998968 A GB 1998968A GB 1998968 A GB1998968 A GB 1998968A GB 1190503 A GB1190503 A GB 1190503A
Authority
GB
United Kingdom
Prior art keywords
frequency
striker
gear wheel
lever
magnet
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
Application number
GB1998968A
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.)
General Time Corp
Original Assignee
General Time Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Time Corp filed Critical General Time Corp
Publication of GB1190503A publication Critical patent/GB1190503A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00—Producing acoustic time signals by electrical means
    • 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
    • G04C21/18—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by mechanically unlocking an electromechanical vibrator, e.g. actuated by the leakage flux of the electric driving means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Electromechanical Clocks (AREA)

Abstract

1,190,503. Electric alarm clocks. GENERAL TIME CORP. April 26, 1968 [April 28, 1967; Dec. 18, 1967], No.19989/68. Heading G3T. An alarm system for an electric clock driven .by a synchronous motor 10 Fig. 1 (not shown) comprises a resilient vibrating element 24 carrying a striker 30 for striking a bell 31 or other sounding element, a permanent magnet 32 mounted on the element 24 adjacent an auxiliary pole 25 included in the synchronous motor 10 for generating alternating magnetic flux of a predetermined frequency to apply driving impulses to the element 24 via the magnet 32 at the same frequency as that of the alternating magnetic flux. The alarm is preset for actuation at a desired time by turning a control shaft 16 to adjust a gear wheel 14 relative to a gear wheel 15 driven by the driving train and having a slot 18 therein adapted to register at the pre-set time with a cam 12 on the gear wheel 14, whereby a control lever 19 may be rocked by a spring 22 to release the element 24 for vibration. The lever 19 is permitted so to release element 24 only if a manually adjustable plunger 20 is set so that slot 21 therein registers with a projection 21a and an arm 19b of the lever 19. If the natural frequency of vibration of the element 24 and its associated magnet 26 and striker 30 is a submultiple of the frequency of the driving impulses the striker 30 may be arranged to strike the bell 31 at a frequency equal to said natural frequency. An alternative embodiment is described in which the vibrating element is pivotally mounted between its ends.
GB1998968A 1967-04-28 1968-04-26 Electric Clock Alarm System Including an Electromagnetic Vibrator. Expired GB1190503A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US63468767A 1967-04-28 1967-04-28
US69130167A 1967-12-18 1967-12-18

Publications (1)

Publication Number Publication Date
GB1190503A true GB1190503A (en) 1970-05-06

Family

ID=27092212

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1998968A Expired GB1190503A (en) 1967-04-28 1968-04-26 Electric Clock Alarm System Including an Electromagnetic Vibrator.

Country Status (4)

Country Link
BR (1) BR6898649D0 (en)
DE (1) DE1773293B2 (en)
FR (1) FR1560982A (en)
GB (1) GB1190503A (en)

Also Published As

Publication number Publication date
DE1773293A1 (en) 1971-02-11
FR1560982A (en) 1969-03-21
DE1773293B2 (en) 1971-09-02
BR6898649D0 (en) 1973-03-13

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees