US3030764A - Escapement lever for watches, timepieces and the like - Google Patents

Escapement lever for watches, timepieces and the like Download PDF

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Publication number
US3030764A
US3030764A US59241A US5924160A US3030764A US 3030764 A US3030764 A US 3030764A US 59241 A US59241 A US 59241A US 5924160 A US5924160 A US 5924160A US 3030764 A US3030764 A US 3030764A
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United States
Prior art keywords
lever
pallet
arm
pallets
face
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Expired - Lifetime
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US59241A
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English (en)
Inventor
Stamm Heinrich
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.)
Ebauchesfabrik ETA AG
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Ebauchesfabrik ETA AG
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    • 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

Definitions

  • This invention relates to escapement levers for watches, timepieces and the like and in particular to the holding arrangement of the pallets of these levers.
  • the escapement levers known in the art and used in the best watches are provided at the ends of their arms with heavy portions serving as holding frame for the pallet jewels.
  • these end portions of the lever arms are slit so as to form a lodging for the pallet jewels.
  • the thickness of the lever arm ends is substantially equal to that of the pallet jewels.
  • the end portions of the lever arms are provided with slots they still constitute a relatively bulky frame contributing to give the whole lever a great moment of inertia.
  • These fixing means used in the best watches to secure the pallets to the lever have moreover the drawback that they only grip the pallets along two opposite faces. The pallets may consequently happen to get inclined with respect to the lever for instance when the shellac or other glue securing the pallets to the lever is heated to enable setting said pallets with respect to the lever.
  • FIG. 1 is a plan view of this embodiment and FIG. 2 an elevational view thereof.
  • the lever represented has the general form of a common three-armed lever as used with straight line escapements. It is rigidly fixed on to a usual staif 1 provided wtih pivots 2 and 3 at both its ends for journalling the lever in pivot bearings (not 3,030,764 Patented Apr. 24, 1962 shown) carried by the base plate and by the pallet cock, respectively, of a watch movement.
  • the two pallet holding arms 4 and 5 of this lever are formed with enlarged substantially circular portions 6 at their ends.
  • Transverse slots 7 are provided in the upper face of parts 6 so as to extend in directions corresponding to those of the usual slits provided across the lever arm ends of the known levers.
  • These slots 7 serve as lodging for the entry or receiving pallet jewel 8 and for the exit or discharging pallet jewel 9.
  • the form of these jewels and in particular the directions of their locking faces 8a, 9a and of their impulse faces 8b, 9b are the same as with usual levers.
  • the jewels 8, 9 are of course also secured to the lever within slots 7 by means of glue as for instance shellac, so that they can be shifted lengthwise within slots 7 to adjust the operation of the escapement with precision.
  • the pallets 8 and 9 are held along three faces by the two side faces and the bottom face of slots 7.
  • Cylindrical bores 10 are provided across the enlarged portion 6 of the lever in a direction parallel to the rocking axis of the lever.
  • the diameter of these bores is somewhat greater than the widths of pallets 8 and 9, so that each side face and the bottom face of slots 7 is divided into two surface portions.
  • Each pallet is thus held transversely by means of two pairs of surface portions 7a, 7b and it lies on two bottom portions 7c for its holding at the proper level.
  • each of the pallets 8 and 9 is held in two points, one of which is situated at the rear portion of the pallet and the other one is situated in the mid portion of the pallet. It will now' be observed that holding the pallet by gripping it at two diiferent points which are relatively far from one another has of course the advantage to ensure a precise fixing of the pallets to the lever.
  • the cylindrical bores 10 have furthermore the advantage to make the lever arms 4, 5, substantially lighter than those of the usual levers thus correspondingly reducing the moment of inertia of the whole lever.
  • the bores 10 have still the advantage that they greatly facilitate the introduction of glue on to the surface portions of the pallets and the lever arms in contact with one another. If the glue used is for instance shellac, it can merely be dropped into bores 10 from the lower face of the lever and a thin film of shellac will be formed on every surface portion of the pallet engaged by a correspnnding surface portion of the lever arms.
  • FIG. 2 shows that the pallets extend above the upper lever face. With respect to staif 1 the upper lever face 11 is thus farther away from pivot '3 than with usual levers, provided that the pallets be in both cases located at the same level.
  • a substantial gap between the upper lever face and the lower face of the lever cock (not shown) carrying the bearing of pivot 3 permits lubricating this bearing without any danger of forming an oil film by capillary action between said lower cock face and face 11 of the lever.
  • Such an oil film often happens indeed to be formed with the usual levers when oiling the upper pivot thereof, because the usual levers are closely adjacent to their cocks.
  • An oil film formed between the lever and its cock has of course the drawback to handicap the rocking motions of the lever thus causing the watch to stop. Most of the watch manufacturers prefer therefore leaving the upper pivot of the lever dry.
  • an escapement lever comprising an arm and a tions gripping a rearportiori of said pallet and the other one gripping a mid-portion of'said pallet.
  • anjescapement lever comprising an arm and a pallet on said arm, a pallet holding arrangement comprising a first portion of said arm provided with pallet holding. means to hold a rear portion of said pallet, and a respect thereto, a pallet holding arrangement comprising second portion of said arm provided with pallet holding means remote from said pallet holding means of said first arm-portion to hold a mid-portion of said pallet.
  • a pallet holding arrangement comprising afirst portion of said arm provided with a slot having two side faces each engaging a portion of opposed side faces of said pallet and a bottom face engaging a portion of a face of said pallet situated betweensaid opposed side faces, and a second portion of said arm provided with a slot aligned with the slot of said first arm portion and having two side faces each engaging a portion of said opposed side faces of said pallet and a bottom face engaging a portion of said face of the pallet situated between said opposed side faces, said face portions of saidpallet engaged by the slot faces of said first arm portion and said face portions of said pallet engaged by an opening said arm forming a pallet supporting rear arm portion and a pallet supporting fore arm portion, aligned slots each provided in one of said arm portions, each of said slots being formed with two opposite side faces and a bottom face extendingitherebetween, said slot faces of said rear arm portion surrounding and firmly engaging a rear pallet portion and-said slot faces of said forearm portion
  • An escapement lever for watches, timepieces and the like comprising, in combination, two flat arms each-- having an upper and a lower face,each-of said' arms having a free end and an enlarged portion formed at said free end, a transverse slot provided in one of said faces of each of said enlarged portions, each slot having two opposite side faces and a bottom face, a bore pcrpendicw lar to said lower and upper faces of said arms provided side faces and said bottom faces into two pallet engaging surface portions.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Adornments (AREA)
  • Food-Manufacturing Devices (AREA)
  • Dowels (AREA)
  • Percussive Tools And Related Accessories (AREA)
US59241A 1959-09-30 1960-09-29 Escapement lever for watches, timepieces and the like Expired - Lifetime US3030764A (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CH3077728X 1959-09-30
CH357336T 1959-09-30
CH3030764X 1959-09-30
CH357337T 1959-09-30
CH1192983X 1959-09-30
FR834031A FR1263629A (fr) 1959-09-30 1960-07-26 Perfectionnement aux dispositifs de fixationd es palettes à une ancre de pièce d'horlogerie

Publications (1)

Publication Number Publication Date
US3030764A true US3030764A (en) 1962-04-24

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US59241A Expired - Lifetime US3030764A (en) 1959-09-30 1960-09-29 Escapement lever for watches, timepieces and the like
US59242A Expired - Lifetime US3077728A (en) 1959-09-30 1960-09-29 Escapement lever for watches, timepieces and the like

Family Applications After (1)

Application Number Title Priority Date Filing Date
US59242A Expired - Lifetime US3077728A (en) 1959-09-30 1960-09-29 Escapement lever for watches, timepieces and the like

Country Status (4)

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US (2) US3030764A (de)
CH (2) CH357337A (de)
DE (1) DE1192983B (de)
FR (1) FR1263629A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD663646S1 (en) * 2010-12-15 2012-07-17 Chopard Technologies Sa Escapement anchor
USD819896S1 (en) * 2017-08-21 2018-06-05 Avian Cafe Corporation Aves cafe
USD836851S1 (en) 2017-12-18 2018-12-25 Avian Corporation Aves cafe

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1233783B (de) * 1963-05-31 1967-02-02 Junghans Ges Mit Beschraenkter Paletten-Anker fuer Uhrwerke
JPS513001Y1 (de) * 1970-07-30 1976-01-28
US4375382A (en) * 1979-11-30 1983-03-01 Wallace Computer Services, Inc. Method of making a continuous web form and product, particularly one suitable for airline ticketing
EP1965277B1 (de) * 2007-03-01 2009-11-25 Audemars Piguet (Renaud et Papi) SA Anker für Uhrhemmungsmechanismus vom Typ Anker und Rad
EP2557460A1 (de) * 2011-08-12 2013-02-13 Nivarox-FAR S.A. Metallanker mit Polymer-Hörnern
JP6153254B2 (ja) * 2013-07-25 2017-06-28 セイコーインスツル株式会社 時計用アンクル、脱進機構、時計用ムーブメントおよび機械式時計

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US856091A (en) * 1905-04-24 1907-06-04 Waltham Watch Co Escapement.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1327226A (en) * 1916-07-13 1920-01-06 Long Charles E De Watch-escapement
CH288488A (fr) * 1950-12-05 1953-01-31 Ebauches Sa Echappement à ancre.
FR1057312A (fr) * 1952-05-23 1954-03-08 Mouvement d'horlogerie ainsi que les montres et appareils d'horlogerie munis de ce mouvement
US2971324A (en) * 1957-03-16 1961-02-14 Ebauches Sa Lever escapement for timepieces
US2964901A (en) * 1958-03-06 1960-12-20 Ebauches Sa Lever escapement for timepieces

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US856091A (en) * 1905-04-24 1907-06-04 Waltham Watch Co Escapement.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD663646S1 (en) * 2010-12-15 2012-07-17 Chopard Technologies Sa Escapement anchor
USD819896S1 (en) * 2017-08-21 2018-06-05 Avian Cafe Corporation Aves cafe
USD836851S1 (en) 2017-12-18 2018-12-25 Avian Corporation Aves cafe

Also Published As

Publication number Publication date
CH357337A (de) 1961-09-30
US3077728A (en) 1963-02-19
FR1263629A (fr) 1961-06-09
CH357336A (de) 1961-09-30
DE1192983B (de) 1965-05-13

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