US3845616A - Lever escapement for a timepiece movement - Google Patents

Lever escapement for a timepiece movement Download PDF

Info

Publication number
US3845616A
US3845616A US00403658A US40365873A US3845616A US 3845616 A US3845616 A US 3845616A US 00403658 A US00403658 A US 00403658A US 40365873 A US40365873 A US 40365873A US 3845616 A US3845616 A US 3845616A
Authority
US
United States
Prior art keywords
lever
escapement
recited
pallets
wheel
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
US00403658A
Inventor
P Jeanmairet
A Paroz
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.)
Marc Favre & Cie Sa ch
Marc Favre et Cie SA
Original Assignee
Marc Favre et Cie 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 Marc Favre et Cie SA filed Critical Marc Favre et Cie SA
Application granted granted Critical
Publication of US3845616A publication Critical patent/US3845616A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
    • 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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • G04B15/08—Lever escapements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49579—Watch or clock making

Definitions

  • ABSTRACT The invention provides a compact and easily assembled lever escapement by making the lever from two pre-shaped flat parts fastened together.
  • the first part has a lever notch and horns at one end, and notches on two arms at the other end.
  • the second part has a guard pin or dart at one end and pallets carrying banking members at the other, the pallets being fitted into and located by the notches when the two parts of the lever are assembled.
  • the construction enables a relatively small escapement wheel to be used, thus reducing its inertia and hence the wear on the pallets.
  • the object of the present invention is to provide a lever escapement, which can be assembled mechanically and can cooperate with an escapement wheel having a reduced movement of inertia, and hence improved accuracy, i.e.,
  • FIG. 1 is a plan view an a large scale of an escapement mechanism according to the invention, taken along the line I-I of FIG. 2;
  • FIG. 2 is an enlarged section of the escapement mechanism of FIG. 1;
  • FIG. 3 is a plan view showing an alternative embodiment of the horns.
  • the escapement comprises a lever 1 including a first portion constituted by an upper body 2 and a second portion constituted by a lower platform 3, which has an extension at the dart 4, which cooperates within the periphery of a safety-roller 5 to avoid an accidental upsetting of the lever l in the case of shocks.
  • the opposite end of the lower platform 3 comprises banking members 6, which at times come into contact with a ring 7 fashioned on a shoulder 8 of an escapement pinion 9, which is pivoted between a plate 10 and an escapement bridge 11.
  • the lever l is mounted on a shaft 14 also pivoted between the plate 10 and the escapement bridge 11.
  • the upper part 2 of the lever is provided at the two arm ends with notches l5, and serving to position semicircular pallets 16, which are fixed on the lateral faces of the banking members 6.
  • the shoulder 8 of the escapement pinion 9 carries an escapement wheel 18 having five teeth which considerably reduces its diameter compared with known escapement wheels.
  • the wheel is driven by the pinion 9 of the gear train of the horological member in the usual manner.
  • the upper body 2 of the lever is notched at one of its ends to form a fork 20 presenting a lever notch 21 comprising horns 22, which co-operate with a peg 23 fixed in the roller 24 mounted on the balance staff 25 of the balance wheel.
  • the fork 20 is only shown in FIG. 1 and is machined in the upper body 2 only.
  • the upper body 2 after machining, is secured, as by soldering, riveting or by adhesive to the lower platform 3
  • the general principle of operation of the movement is known; in the embodiment, which forms the subject of the invention, the peg 23 engages temporarily in the notch 21 to initiate an oscillatory movement of the lever 1 around the shaft 14, which permits an unidirectional rotational rotation of the escapement wheel 18.
  • the lower platform 3 of the lever l is provided with holes for positioning the pallets 16, the shape and dimension of these holes being determined by the profile of the pallets 16.
  • the escapement wheel 18 may be provided with a greater number of teeth if required, for example 15.
  • a lever escapement for a time piece movement comprising a lever mounted for oscillating motion and including a first and a second portion assembled together after forming thereof, said first portion having pallet guides and spaced horns defining a lever notch therebetween, said second portion including integrally a dart and banking members, and pallets on said banking members and engaged with said guides.
  • a lever escapement as recited in claim 1 including an escapement wheel and shaft and a disc fixed on said shaft so that said banking members strike alternatively against said disc.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Vibration Dampers (AREA)
  • Micromachines (AREA)

Abstract

The invention provides a compact and easily assembled lever escapement by making the lever from two pre-shaped flat parts fastened together. The first part has a lever notch and horns at one end, and notches on two arms at the other end. The second part has a guard pin or dart at one end and pallets carrying banking members at the other, the pallets being fitted into and located by the notches when the two parts of the lever are assembled. The construction enables a relatively small escapement wheel to be used, thus reducing its inertia and hence the wear on the pallets.

Description

United States Patent [1 Jeanmairet et a1.
[ Nov. 5, 1974 [75] Inventors: Pierre Jeanmairet, Nidau; Andr Paroz, Brugg, both of Switzerland [73] Assignee: Marc Favre & Cie S.A., Canton of Berne, Switzerland 22 Filed: on. 4, 1973 [21] App]. No.: 403,658
[30] Foreign Application Priority Data [58] Field of Search 58/116 R, 116 M, 121 R, 58/121 A;29/177, 178
[5 6] References Cited UNITED STATES PATENTS 2,717,488 9/1955 Linard 58/121 R 3,248,783 5/1966 Tuetey 58/121 R X 3,708,975 1/1973 Davoine 58/121 R FOREIGN PATENTS OR APPLICATIONS 2,126,225 6/1972 France 58/121 R 93,041 7/1897 Germany 511/12] R 761,332 11/1956 Great Britain 58/121 R 243,142 6/1946 Switzerland 58/121 R Primary ExaminerGeorge H. Miller, Jr. Attorney, Agent, or Firm-1mirie and Smiley 5 7] ABSTRACT The invention provides a compact and easily assembled lever escapement by making the lever from two pre-shaped flat parts fastened together. The first part has a lever notch and horns at one end, and notches on two arms at the other end. The second part has a guard pin or dart at one end and pallets carrying banking members at the other, the pallets being fitted into and located by the notches when the two parts of the lever are assembled. The construction enables a relatively small escapement wheel to be used, thus reducing its inertia and hence the wear on the pallets.
7 Claims, 3 Drawing Figures sum ear 3 PATENTEBIUV 5 I874 LEVER ESCAPEMENT FOR A TIMEPIECE MOVEMENT BACKGROUND OF THE INVENTION The present invention has for its subject a lever escapement for a timepiece movement, the lever thereof being mounted to oscillate and provided with a dart and bankings.
The object of the present invention is to provide a lever escapement, which can be assembled mechanically and can cooperate with an escapement wheel having a reduced movement of inertia, and hence improved accuracy, i.e.,
a better ratio I/L4 Moment of inertia of the balance wheel/(Distance, wheel-balance) 4 This is because the invention enables the number of teeth on the escapement wheel to be reduced in number and hence the wheel can be reduced in size. Again, seeing that the oscillatory action of the lever is independent of the wheel movement, the manufacture of the latter is facilitated.
SUMMARY OF THE INVENTION BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view an a large scale of an escapement mechanism according to the invention, taken along the line I-I of FIG. 2;
FIG. 2 is an enlarged section of the escapement mechanism of FIG. 1;
FIG. 3 is a plan view showing an alternative embodiment of the horns.
DETAILED DESCRIPTION OF THE INVENTION From FIGS. 1 and 2 it can be seen that the escapement comprises a lever 1 including a first portion constituted by an upper body 2 and a second portion constituted by a lower platform 3, which has an extension at the dart 4, which cooperates within the periphery of a safety-roller 5 to avoid an accidental upsetting of the lever l in the case of shocks.
The opposite end of the lower platform 3 comprises banking members 6, which at times come into contact with a ring 7 fashioned on a shoulder 8 of an escapement pinion 9, which is pivoted between a plate 10 and an escapement bridge 11.
The lever l is mounted on a shaft 14 also pivoted between the plate 10 and the escapement bridge 11.
The upper part 2 of the lever is provided at the two arm ends with notches l5, and serving to position semicircular pallets 16, which are fixed on the lateral faces of the banking members 6.
The shoulder 8 of the escapement pinion 9 carries an escapement wheel 18 having five teeth which considerably reduces its diameter compared with known escapement wheels. The wheel is driven by the pinion 9 of the gear train of the horological member in the usual manner.
The upper body 2 of the lever is notched at one of its ends to form a fork 20 presenting a lever notch 21 comprising horns 22, which co-operate with a peg 23 fixed in the roller 24 mounted on the balance staff 25 of the balance wheel.
The fork 20 is only shown in FIG. 1 and is machined in the upper body 2 only.
The upper body 2, after machining, is secured, as by soldering, riveting or by adhesive to the lower platform 3 The general principle of operation of the movement is known; in the embodiment, which forms the subject of the invention, the peg 23 engages temporarily in the notch 21 to initiate an oscillatory movement of the lever 1 around the shaft 14, which permits an unidirectional rotational rotation of the escapement wheel 18.
The oscillatory movements of the lever 1 in its two directions are limited by contact of the banking members 6 with the ring 7, which is located between the escapement wheel 18 and the pinion 9.
In an alternative embodiment (FIG. 3), the lower platform 3 of the lever l is provided with holes for positioning the pallets 16, the shape and dimension of these holes being determined by the profile of the pallets 16.
The escapement wheel 18 may be provided with a greater number of teeth if required, for example 15.
We claim:
1. A lever escapement for a time piece movement, comprising a lever mounted for oscillating motion and including a first and a second portion assembled together after forming thereof, said first portion having pallet guides and spaced horns defining a lever notch therebetween, said second portion including integrally a dart and banking members, and pallets on said banking members and engaged with said guides.
2. A lever escapement as recited in claim 1 including an escapement wheel and shaft and a disc fixed on said shaft so that said banking members strike alternatively against said disc.
3. An escapement as recited in claim 1, wherein said two lever portions are soldered together.
4. An escapement as recited in claim 1, wherein said two lever portions are secured together by an adhesive.
tion with respect to said first lever portion.

Claims (7)

1. A lever escapement for a time piece movement, comprising a lever mounted for oscillating motion and including a first and a second portion assembled together after forming thereof, said first portion having pallet guides and spaced horns defining a lever notch therebetween, said second portion including integrally a dart and banking members, and pallets on said banking members and engaged with said guides.
2. A lever escapement as recited in claim 1 including an escapement wheel and shaft and a disc fixed on said shaft so that said banking members strike alternatively against said disc.
3. An escapement as recited in claim 1, wherein said two lever portions are soldered together.
4. An escapement as recited in claim 1, wherein said two lever portions are secured together by an adhesive.
5. An escapement as recited in claim 1, wherein said two lever portions are riveted together.
6. An escapement as recited in claim 1, wherein said escapement wheel has at least five teeth.
7. An escapement as recited in claim 1, wherein said pallet guides on said first lever portion comprises open notches which during assembly of said first and second portions position said pallets on said second lever portion with respect to said first lever portion.
US00403658A 1972-10-12 1973-10-04 Lever escapement for a timepiece movement Expired - Lifetime US3845616A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1491672A CH578754B5 (en) 1972-10-12 1972-10-12

Publications (1)

Publication Number Publication Date
US3845616A true US3845616A (en) 1974-11-05

Family

ID=4404825

Family Applications (1)

Application Number Title Priority Date Filing Date
US00403658A Expired - Lifetime US3845616A (en) 1972-10-12 1973-10-04 Lever escapement for a timepiece movement

Country Status (5)

Country Link
US (1) US3845616A (en)
JP (1) JPS4974570A (en)
CH (2) CH578754B5 (en)
DE (1) DE2350218C3 (en)
FR (1) FR2203104B1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6431746B1 (en) * 1999-04-28 2002-08-13 Seiko Instruments Inc. Mechanical timepiece with timed annular balance rotating angle control mechanism
US20040013046A1 (en) * 2002-05-28 2004-01-22 Ulysse Nardin S.A. Escapement for timekeeper
US6708576B2 (en) * 2001-01-09 2004-03-23 Ulysse Nardin S.A. Escapement for a timekeeper
CN100547502C (en) * 2003-12-04 2009-10-07 蒙特雷布勒盖股份有限公司 The escapement that is used for clock and watch
CN100549873C (en) * 2003-12-16 2009-10-14 蒙特雷布勒盖股份有限公司 The escapement of clock and watch
CN100552570C (en) * 2003-12-04 2009-10-21 蒙特雷布勒盖股份有限公司 The escapement of clock and watch
CN102375401A (en) * 2010-07-30 2012-03-14 Eta瑞士钟表制造股份有限公司 Wear and shock resistant escapement lever for a timepiece movement
US20130036599A1 (en) * 2011-08-12 2013-02-14 Nivarox-Far S.A. Metal pallets with polymer horns
US9075395B2 (en) 2013-11-06 2015-07-07 Eta Sa Manufacture Horlogere Suisse Timepiece pallet lever with optimised horns
CN108700845A (en) * 2015-12-21 2018-10-23 迪特拉有限公司 The operating method of clock and watch release and the device
WO2020018838A1 (en) * 2018-07-19 2020-01-23 Janer Werner Multi-cam, continuous-drive escapement mechanism

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2320280A1 (en) * 2009-11-06 2011-05-11 Nivarox-FAR S.A. Anchor for clock escapement system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE93041C (en) *
CH243142A (en) * 1944-08-09 1946-06-30 Cornioley Maurice Ankle anchor.
US2717488A (en) * 1952-01-07 1955-09-13 Gen Horlogere Noiseless anchor-escapement, particularly for clock-works
GB761332A (en) * 1953-12-24 1956-11-14 Camille Joriot Automatic device for regulating the amplitude of the oscillations of a watch balance wheel
US3248783A (en) * 1961-11-09 1966-05-03 Far Fab Assortiments Reunies Method of manufacture of a pin pallet fork of a timepiece
FR2126225A3 (en) * 1971-02-22 1972-10-06 Dl
US3708975A (en) * 1970-03-12 1973-01-09 Fab D Assortiments Reunies Flat pin pallet

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE93041C (en) *
CH243142A (en) * 1944-08-09 1946-06-30 Cornioley Maurice Ankle anchor.
US2717488A (en) * 1952-01-07 1955-09-13 Gen Horlogere Noiseless anchor-escapement, particularly for clock-works
GB761332A (en) * 1953-12-24 1956-11-14 Camille Joriot Automatic device for regulating the amplitude of the oscillations of a watch balance wheel
US3248783A (en) * 1961-11-09 1966-05-03 Far Fab Assortiments Reunies Method of manufacture of a pin pallet fork of a timepiece
US3708975A (en) * 1970-03-12 1973-01-09 Fab D Assortiments Reunies Flat pin pallet
FR2126225A3 (en) * 1971-02-22 1972-10-06 Dl

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6431746B1 (en) * 1999-04-28 2002-08-13 Seiko Instruments Inc. Mechanical timepiece with timed annular balance rotating angle control mechanism
US6708576B2 (en) * 2001-01-09 2004-03-23 Ulysse Nardin S.A. Escapement for a timekeeper
US20040013046A1 (en) * 2002-05-28 2004-01-22 Ulysse Nardin S.A. Escapement for timekeeper
US6802645B2 (en) * 2002-05-28 2004-10-12 Ulysse Nardin S.A. Escapement for timekeeper
CN100547502C (en) * 2003-12-04 2009-10-07 蒙特雷布勒盖股份有限公司 The escapement that is used for clock and watch
CN100552570C (en) * 2003-12-04 2009-10-21 蒙特雷布勒盖股份有限公司 The escapement of clock and watch
CN100549873C (en) * 2003-12-16 2009-10-14 蒙特雷布勒盖股份有限公司 The escapement of clock and watch
CN103257564B (en) * 2010-07-30 2015-12-09 Eta瑞士钟表制造股份有限公司 For the wear-resisting and shock proof escapement bar of watch and clock movement
CN103257564A (en) * 2010-07-30 2013-08-21 Eta瑞士钟表制造股份有限公司 Wear-resisting and shock-proof escapement rod for clock movement
CN102375401A (en) * 2010-07-30 2012-03-14 Eta瑞士钟表制造股份有限公司 Wear and shock resistant escapement lever for a timepiece movement
US20130036599A1 (en) * 2011-08-12 2013-02-14 Nivarox-Far S.A. Metal pallets with polymer horns
US9015921B2 (en) * 2011-08-12 2015-04-28 Nivarox-Far S.A. Metal pallets with polymer horns
US9075395B2 (en) 2013-11-06 2015-07-07 Eta Sa Manufacture Horlogere Suisse Timepiece pallet lever with optimised horns
CN108700845A (en) * 2015-12-21 2018-10-23 迪特拉有限公司 The operating method of clock and watch release and the device
CN108700845B (en) * 2015-12-21 2020-08-04 迪特拉有限公司 Timepiece escapement device and method for operating such a device
WO2020018838A1 (en) * 2018-07-19 2020-01-23 Janer Werner Multi-cam, continuous-drive escapement mechanism

Also Published As

Publication number Publication date
FR2203104A1 (en) 1974-05-10
DE2350218A1 (en) 1974-05-02
FR2203104B1 (en) 1977-03-11
DE2350218B2 (en) 1975-05-07
CH1491672A4 (en) 1976-03-15
DE2350218C3 (en) 1975-12-11
JPS4974570A (en) 1974-07-18
CH578754B5 (en) 1976-08-13

Similar Documents

Publication Publication Date Title
US3845616A (en) Lever escapement for a timepiece movement
US11493882B2 (en) Rotating resonator with flexure bearing maintained by a detached lever escapement
US7686503B2 (en) Watch escapement
TWI461865B (en) "sprung balance regulating system for a mechanical timepiece movement and timepiece having such a system
US3826076A (en) Anchor escapement for time-measuring instruments
US11640141B2 (en) Timepiece comprising a tourbillon
US3834155A (en) Offset pallet lever for watch escapement
US3335562A (en) Anchor escapement for timepieces
US3678683A (en) One-piece roller-impulse member for timepiece escapement
US3462942A (en) Dial train drive
US3704582A (en) Indexing mechanism for horological instrument
US3732686A (en) Watch movement including alarm mechanism
US3803830A (en) Plastic escapement lever
US3568432A (en) Chronograph-watch with independently mounted chronograph mechanism
US3452539A (en) Stop and start mechanism for timepiece movement
JP2021522522A (en) Free direct escape mechanism for timekeeper
US3440815A (en) Escapement device
US4203281A (en) Assembly comprising a timepiece pallet anchor and its frame
US3670493A (en) Indexing mechanism for electric/electronic timepieces
US3731480A (en) Watch pallet lever having integral projection determining swing
US2907168A (en) Pallet type escape mechanism for time pieces
US2725716A (en) Cylinder escapement for watchmaking parts
US3312053A (en) Step by step drvie mechanism for timepiece
US3805513A (en) Anchor escapement
GB1481129A (en) Control escapement and a time switch having such an escapement