CH312292A - Method of manufacturing friction members for clockwork mechanisms. - Google Patents
Method of manufacturing friction members for clockwork mechanisms.Info
- Publication number
- CH312292A CH312292A CH312292DA CH312292A CH 312292 A CH312292 A CH 312292A CH 312292D A CH312292D A CH 312292DA CH 312292 A CH312292 A CH 312292A
- Authority
- CH
- Switzerland
- Prior art keywords
- clockwork mechanisms
- friction members
- molybdenum
- mechanisms
- clockwork
- Prior art date
Links
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
- G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
- G04B31/004—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor characterised by the material used
- G04B31/016—Plastic bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1095—Construction relative to lubrication with solids as lubricant, e.g. dry coatings, powder
-
- 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
- G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
- G04B31/004—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor characterised by the material used
- G04B31/012—Metallic bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2370/00—Apparatus relating to physics, e.g. instruments
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Lubricants (AREA)
Description
Procédé de fabrication d'organes de frottement pour mécanismes d'horlogeLPié# Un sait qu'il est difficile de conserver aux mécanismes d'horlogerie leur précision d'ori gine.
Or, dans tous les mécanismes d'horlogerie portatifs la mesure du temps est obtenue au moyen d'un ensemble oscillant composé d'un balancier et d'un ressort spiral, dont les oseil lations théoriquement devraient être iso- chrones. En pratique,
celles-ci ne le sont ja mais parfaitement. Il, est donc évident que si l'ensemble oscillant présente des variations d'amplitude, celles-ci se traduiront par des va- riations de la période d'oscillation et, donc des variations de réglage du mécanisme @d'hor- logerie.
Ces variations d'amplitude sont. en partie inévitables, elles proviennent: 1 du désarmage du ressort moteur dont le couple diminue nu fur et à mesure; 2 du rendement des engrenages; 3 de l'huilage appliqué sur toutes les par ties frottantes.
Les deux premiers points sont inhérents au principe des mécanismes d'horlogerie et ne peuvent être éliminés. Le troisième, au con traire, pose un problème que, depuis long temps, auciui horloger n'a réussi à résoudre.
En effet, on constate, en ce qui concerne l'application d'huiles spéciales destinées à l'horlogerie, que plus ou moins rapidement l'huile sèche, se décompose ou, alors, s'étale,
sans parler de la différence de viscosité dé coulant des variations de température aux-
EMI0001.0067
quelles <SEP> sont <SEP> soumis <SEP> les <SEP> mécanïsmü"@*qV logerie. L'invention a pour but de remédier à cet inconvénient de l'huilage en permettant de supprimer tout huilage.
Suivant le procédé selon l'invention on forme au moins aux par ties frattantes de la surface desdits organes une couche .de bisulfure de molybdène dont le coefficient de frottement est extrêmement faible, assurant des qualités frottantes excel lentes et constantes -dans le temps.
Le dessin représente, à titre d'exemple, un palier obtenu au moyen du procédé suivant l'invention.
Fig.1 montre un coussinet en molybdène, en coupe, et fig. 2 montre un rouage pivotant dans les coussinets selon l'invention.
Le coussinet A en molybdéne rappelle dans ses formes générales une pierre couram ment utilisée en horlogerie;
son dégagement A1 n'a ici que l'intérêt de réduire la lon gueur du trou et non pas comme dans les pierres classiques de servir de réserve d'huile. Le coussinet ainsi réalisé est ensuite traité chimiquement suivant un procédé classique en chimie,
par exemple par l'action. de l'acide sulfhydrique ou du sulfure d'ammoniiun.
Ce coussinet peut être obtenu par frittage. La fig. 2 représente un pignon 1 pivotant par ses pivots 2 et 3 dans des coussinets 4 et 5 selon la fig.1, ces derniers étant fixés ici à force dans les bâtis inférieur et supérieur 6 et 7 du mécanisme.
Dans le cas où il utilise des levées rap portées, l'échappement peut être doté de pa lettes en molybdène traité. L'échappement. pourrait aussi comprendre une ancre réalisée complètement en cette matière, et ensuite traitée.
Il est évident qu'on peut également appli quer sur les surfaces frottantes classiques de la montre du bisulfure de molybdène en vue de réduire les frottements sans sortir du do maine de l'invention.
Les montres équipées de cette façon éli- minent complètement les ennuis inhérents à l'utilisation d'un lubrifiant quelconque, ga- rantissant ainsi une durée de fonctionnement beaucoup plus longue entre deux nettoyages et une constance de réglage qu'on ne saurait obtenir par les procédés classiques.
Method of manufacturing friction members for clock mechanisms LPié # It is known that it is difficult to keep watch mechanisms with their original precision.
Now, in all portable clockwork mechanisms, the measurement of time is obtained by means of an oscillating assembly made up of a balance and a spiral spring, the positions of which should theoretically be isochronous. In practice,
these are never, but perfectly. It is therefore obvious that if the oscillating assembly exhibits variations in amplitude, these will result in variations in the period of oscillation and, therefore, in variations in the adjustment of the clockwork mechanism.
These variations in amplitude are. partly unavoidable, they come from: 1 the unwinding of the mainspring, the torque of which decreases gradually; 2 the efficiency of the gears; 3 oiling applied to all the rubbing parts.
The first two points are inherent in the principle of clockwork mechanisms and cannot be eliminated. The third, on the contrary, poses a problem that no watchmaker has been able to solve for a long time.
Indeed, it is observed, with regard to the application of special oils intended for watchmaking, that more or less quickly the oil dries, decomposes or, therefore, spreads,
not to mention the difference in viscosity resulting from variations in temperature at
EMI0001.0067
which <SEP> are <SEP> subject <SEP> the <SEP> mechanïsmü "@ * qV logerie. The object of the invention is to remedy this drawback of oiling by making it possible to eliminate any oiling.
According to the process according to the invention, at least at the fracting parts of the surface of said members, a layer of molybdenum disulphide is formed, the coefficient of friction of which is extremely low, ensuring excellent friction qualities which are constant over time.
The drawing represents, by way of example, a bearing obtained by means of the process according to the invention.
Fig. 1 shows a molybdenum pad, in section, and fig. 2 shows a cog pivoting in the bearings according to the invention.
The molybdenum bearing A recalls in its general forms a stone commonly used in watchmaking;
its clearance A1 here only has the interest of reducing the length of the hole and not, as in conventional stones, of serving as an oil reserve. The pad thus produced is then chemically treated according to a conventional chemical process,
for example by action. hydrogen sulfide or ammonium sulfide.
This pad can be obtained by sintering. Fig. 2 shows a pinion 1 pivoting by its pivots 2 and 3 in bearings 4 and 5 according to FIG. 1, the latter being fixed here by force in the lower and upper frames 6 and 7 of the mechanism.
If it uses rapid lift, the escapement can be fitted with treated molybdenum paddles. The exhaust. could also include an anchor made completely from this material, and then processed.
It is obvious that it is also possible to apply molybdenum disulfide to conventional rubbing surfaces of the watch with a view to reducing friction without departing from the scope of the invention.
Watches equipped in this way completely eliminate the troubles inherent in the use of any lubricant, thus guaranteeing a much longer operating time between two cleanings and a consistency of adjustment which cannot be obtained by conventional processes.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1055099T | 1952-04-23 | ||
FR312292X | 1952-04-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH312292A true CH312292A (en) | 1955-12-31 |
Family
ID=61627805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH312292D CH312292A (en) | 1952-04-23 | 1953-04-23 | Method of manufacturing friction members for clockwork mechanisms. |
Country Status (2)
Country | Link |
---|---|
CH (1) | CH312292A (en) |
FR (1) | FR1055099A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1143152B (en) * | 1956-06-02 | 1963-01-31 | Straumann Inst Ag | Spring, in particular the mainspring of clocks |
DE1056880B (en) * | 1957-09-18 | 1959-05-06 | Licentia Gmbh | Bearing material |
US3590575A (en) * | 1970-02-06 | 1971-07-06 | Hamilton Watch Co | Oilless shockproof bearing for timepieces |
-
1952
- 1952-04-23 FR FR1055099D patent/FR1055099A/en not_active Expired
-
1953
- 1953-04-23 CH CH312292D patent/CH312292A/en unknown
Also Published As
Publication number | Publication date |
---|---|
FR1055099A (en) | 1954-02-16 |
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