GB796818A - Improvements in electrically-operated warning mechanism - Google Patents

Improvements in electrically-operated warning mechanism

Info

Publication number
GB796818A
GB796818A GB1547155A GB1547155A GB796818A GB 796818 A GB796818 A GB 796818A GB 1547155 A GB1547155 A GB 1547155A GB 1547155 A GB1547155 A GB 1547155A GB 796818 A GB796818 A GB 796818A
Authority
GB
United Kingdom
Prior art keywords
reed
poles
cam
motor
field
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
GB1547155A
Inventor
John Wyndham Ellis
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.)
S Smith and Sons Ltd
S Smith and Sons England Ltd
Original Assignee
S Smith and Sons Ltd
S Smith and Sons England Ltd
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 S Smith and Sons Ltd, S Smith and Sons England Ltd filed Critical S Smith and Sons Ltd
Priority to GB1547155A priority Critical patent/GB796818A/en
Priority to DE1956S0020439 priority patent/DE1749485U/en
Publication of GB796818A publication Critical patent/GB796818A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C15/00—Clocks driven by synchronous motors
    • G04C15/0009—Clocks driven by synchronous motors without power-reserve
    • 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)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Electromechanical Clocks (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

796,818. Electric clocks. SMITH & SONS (ENGLAND), Ltd., S. May 28, 1956 [May 27, 1955], No. 15471/55. Class 139 [Also in Groups XXXV and XXXVIII] An electrically-operated warning mechanism comprises a synchronous motor 3 having two sets of interdigitating poles 8 whose ends are substantially coplanar and lie in a circle, a vibratory reed 5 formed from flat ferromagnetic material and having a ring-shaped portion 9 by which the reed is vibrated under the influence of the stray magnetic field of the poles in a direction normal to plane of the poles, and a cam mechanism driven by the motor 3 and so arranged as to initially hold the reed in a position B in which it is substantially unaffected by the field but to release the reed after a predetermined time to a position A in which it is vibrated by the field. The cam 11 is driven through a fractional connection not shown and a gearing 16, and has a snail periphery engaged by a portion 10 of the reed 5 to position the latter. The motor also drives conventional time-indicating hands not shown in relation to which the cam 11 can be adjusted. The reed may carry a resiliently-mounted hammer to strike a bell as it vibrates, may be adjusted by a screw 7, and has an upset portion 14 engageable by a part conical portion 13 of a plunger 12 depression of which moves the reed into an inoperative position.
GB1547155A 1955-05-27 1955-05-27 Improvements in electrically-operated warning mechanism Expired GB796818A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1547155A GB796818A (en) 1955-05-27 1955-05-27 Improvements in electrically-operated warning mechanism
DE1956S0020439 DE1749485U (en) 1955-05-27 1956-05-26 ALARM CLOCK OR ALARM DEVICE ON SYNCHRONIC CLOCKS OR SIMILAR TIMING DEVICES.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1547155A GB796818A (en) 1955-05-27 1955-05-27 Improvements in electrically-operated warning mechanism

Publications (1)

Publication Number Publication Date
GB796818A true GB796818A (en) 1958-06-18

Family

ID=10059717

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1547155A Expired GB796818A (en) 1955-05-27 1955-05-27 Improvements in electrically-operated warning mechanism

Country Status (2)

Country Link
DE (1) DE1749485U (en)
GB (1) GB796818A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1073400B (en) * 1960-01-14 LICENTIA Patent-Verwaltungs-G.m.b.H., Frankfurt/M '' Synchronous clock with alarm device
DE1274515C2 (en) * 1958-12-30 1973-03-22 Hatot Leon Ets Electrical alarm device, preferably for electrically operated alarm clocks
DE1095748B (en) * 1959-04-09 1960-12-22 Licentia Gmbh Clock with alarm clock driven by a synchronous motor

Also Published As

Publication number Publication date
DE1749485U (en) 1957-07-25

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