US3921387A - Time-piece with time-setting adjustment - Google Patents

Time-piece with time-setting adjustment Download PDF

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Publication number
US3921387A
US3921387A US518601A US51860174A US3921387A US 3921387 A US3921387 A US 3921387A US 518601 A US518601 A US 518601A US 51860174 A US51860174 A US 51860174A US 3921387 A US3921387 A US 3921387A
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US
United States
Prior art keywords
post
hand
shaft
dial
time
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
US518601A
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English (en)
Inventor
Pierre Barbier
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.)
Jaeger SA
Original Assignee
Jaeger SA
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 Jaeger SA filed Critical Jaeger SA
Application granted granted Critical
Publication of US3921387A publication Critical patent/US3921387A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • G04B27/00—Mechanical devices for setting the time indicating means

Definitions

  • ABSTRACT A means for adjusting the time indicated by a clock by moving an actuator to engage the minute hand and turn it.
  • the invention relates to clocks having a second hand which might be damaged by movement of the actuator and accordingly the actuator has a bevelled edge leading to a radial ridge for deflecting the second hand and also the actuator is positioned very close to the second hand post.
  • the invention relates to a watch or a clock "herein called a time-piece for example for mounting in an automobile, having a second hand on a port within a hollow time-setting housing, whichwill usually be the minute hand shaft, and having an actuator extending through the face of the dial and capable of axial movement to engage the housing and rotational movement to set the time indicated.
  • a known time-piece has a second hand fixed to a barrel which is itself fastened to the second hand spindle.
  • the regulating spindle of the time setting device passes through the face of the dial and has a connecting means provided with depending two feet positioned lower than the spindle which pass over the second hand and engage in a corresponding part of the housing.
  • the main disadvantage of such a device lies in the fact that if, when the regulating spindle is displaced downwards, one of the clips is to the right of the center-second hand and rests on it, the latter can be bent in such a way that it catches the hour hand, thus causing the watch to stop.
  • An object of the invention is to provide a mechanism for setting the time indicated on the time-piece which is of simple construction and which is not likely to cause damage to the second hand as the actuator moves to engage the housing or as it moves the housing after engagement.
  • the inner end of the actuator comprises a pair of diametrically spaced feet each arranged to engage one of a pair of notches in the housing, the inner end of each foot comprising a bevelled edge.
  • the radial spacing of the feet in the present invention is very slightly greater than the diameter of that part of the post supporting the second hand, so that interference between one of the feet and the said hand can only occur in immediate proximity to the point where the hand emerges from the post.
  • the second hand is made from a steel or threadlike spring and a sufficient length is held in the barrel, de-
  • the upper end of the post above the second hand can be bevelled so that when the actuator is moved downwards the feet are prevented from striking the upper surface of the post.
  • the invention also has the advantage that it avoids interference or jamming between the feet and a part of the time-piece in the clearance between the housing and its bearing or by an eccentric positioning of the actuator bearing on the face of the dial.
  • a preferred embodiment provides for a central cavity to be made in the actuator to accommodate that part of the post which projects above the second hand. In this way, at the moment when the actuator moves downwards, the clutch will be centred upon the housing.
  • FIGURE is an elevation of a setting mechanism in partial section with parts cut away.
  • the watch comprises a central time-setting device 1, second hand 3 integral with a second hand post 16 and a minute hand 4 fixed on a hollow shaft 5 constituting a time-setting housing, and surrounding the post 16 and a second-hand spindle 2.
  • the time-setting device 1 consists of an actuator spindle 6 rotatably movable in a bearing in the face 7 of the dial and capable of being axially displaced downwards, the spindle having at its outer end a regulating knob 8 and at its inner end a clutch 9. Between the knob 8 and the upper surface of the face 7, is a compression spring 10 which tends to hold the clutch 9 in its disengaged position in a counter-bore in the under surface of the face 7.
  • the inner end of the clutch 9 has two feet 11 and 12 which are diametrically separated on either side of the post 16 when the clutch is engaged. Their inner ends are bevelled at 13 and 14 to define a sharp radially extending ridge.
  • the second hand 3 is a fine steel finger 17 with its inner end fast in the plastics post 16, the left-hand end in the FIGURE being flush with the surface of the post.
  • the upper end 19 of the post 16 is bevelled, and the diameter of that part 18 which is within the area of action of the feet 11 and 12 is less than that of the rest of the post.
  • this part 18 of the post fits easily into a cavity 20 in the clutch 9, the diameter of which cavity, together with the radial spacing of the inner faces of the feet 11 and 12, is approximately .2 millimeters greater than that of the upper part 18 of the post.
  • the knob When the time shown is to be re-set, the knob is pushed to force the clutch 9 downwards to engage the notches 15.
  • the bevel at the top of the post 16 assists in directing the part 18 of the post into the cavity 20 so that the feet pass on either side of the part 18. If a foot 11 or 12 should foul the second hand 3 as it descends, the bevel 13 or 14 will displace the hand slightly so that it is not bent.
  • Adjustment of the time shown is by rotating the knob 8 to rotate the shaft 5 and the minute hand 4. During rotation the clutch will probably encounter the second hand 3, but since engagement will be very close to the post 16, there will be substantially no bending moment on the finger 17 so that it will not be bent.
  • a time-piece comprising in combination a. a dial b. a wire-like second hand having one end thereof mounted in a post which is fixed to a second hand shaft, the upper end of said post adjacent said dial being bevelled,
  • a minute hand mounted on a sleeve, said sleeve and said second hand shaft being coaxially mounted with respect to one another, with said sleeve enveloping said shaft, said sleeve being formed with at least two diametrically opposed notches in the end thereof adjacent said dial, and
  • a rotatable and axially moveable actuator shaft carrying a pair of diametrically spaced feet at the bottom thereof and arranged to engage said notches when said actuator shaft is axially moved shaft is provided with a guidance recess for the upper end of the said post.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Measuring Volume Flow (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Mechanical Control Devices (AREA)
US518601A 1973-10-29 1974-10-29 Time-piece with time-setting adjustment Expired - Lifetime US3921387A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7338474A FR2249376B1 (enrdf_load_stackoverflow) 1973-10-29 1973-10-29

Publications (1)

Publication Number Publication Date
US3921387A true US3921387A (en) 1975-11-25

Family

ID=9127051

Family Applications (1)

Application Number Title Priority Date Filing Date
US518601A Expired - Lifetime US3921387A (en) 1973-10-29 1974-10-29 Time-piece with time-setting adjustment

Country Status (9)

Country Link
US (1) US3921387A (enrdf_load_stackoverflow)
JP (1) JPS5535670B2 (enrdf_load_stackoverflow)
AR (1) AR201172A1 (enrdf_load_stackoverflow)
BR (1) BR7408958D0 (enrdf_load_stackoverflow)
CA (1) CA1018778A (enrdf_load_stackoverflow)
ES (1) ES431462A1 (enrdf_load_stackoverflow)
FR (1) FR2249376B1 (enrdf_load_stackoverflow)
GB (1) GB1480263A (enrdf_load_stackoverflow)
IT (1) IT1022999B (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5642635Y2 (enrdf_load_stackoverflow) * 1975-07-14 1981-10-05

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3696607A (en) * 1971-02-22 1972-10-10 Bunker Ramo Center set for clocks

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3696607A (en) * 1971-02-22 1972-10-10 Bunker Ramo Center set for clocks

Also Published As

Publication number Publication date
IT1022999B (it) 1978-04-20
ES431462A1 (es) 1977-01-16
FR2249376A1 (enrdf_load_stackoverflow) 1975-05-23
DE2418731B2 (de) 1976-08-19
BR7408958D0 (pt) 1975-09-23
GB1480263A (en) 1977-07-20
DE2418731A1 (de) 1975-10-09
CA1018778A (en) 1977-10-11
FR2249376B1 (enrdf_load_stackoverflow) 1976-12-03
JPS5080164A (enrdf_load_stackoverflow) 1975-06-30
AR201172A1 (es) 1975-02-14
JPS5535670B2 (enrdf_load_stackoverflow) 1980-09-16
AU7481374A (en) 1976-05-06

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