DEP0044720DA - Device for the step-by-step forward movement of the second hand of clockwork mechanisms. - Google Patents

Description

Patent attorney Dr.-Ing. Wolff

Stuttgart"!

Kleiqtqtr. 13 Kleiststr. 12

Stuttgart-W. , d.l9.Olrt.5O.

EBAUGHBS S> A «t Ieuchatel (Switzerland).

Device for the step-by-step forward movement of the second hand of clockwork gears *

The present invention includes apparatus for incrementally advancing the second hand of clockwork transmissions to the subject »

The invention aims to improve known devices of this type? and it is characterized in that it provides for two coaxially arranged wheels in the drive mechanism of the second hand, one of which is driven by the clockwork while the other runs intermittently after the first wheel, these two wheels bind by a spring elastically-resiliently connected to each other and have the same appearance! of teeth on, the-trailing wheel has a slightly smaller diameter than the clockwork-driven bath. The device also has a stopping device that works together with these two wheels in such a way that when each tooth of the clock is driven through it Wheel of this organ is adjusted by an amount that is sufficient to move the trailing wheel

to clear the passage _s which is then _{intermittently tracked by the spring coupling the two strikes f} the clockwork-driven wheel, which has advanced by several switching steps «. Further details of the invention are characterized in the claims *

The drawing shows, for example, an embodiment of the subject matter of the invention *

Fig, 1 is a plan view of a clock, the gears of which the gate direction for stepwise forward movement of the Having second hand according to the invention,

Fig "2 is a plan view of this gate direction on a larger scale"

3 is a partial section along the line III-III of FIG.

Uta 180 drawn offset *

Fig * 4 is a plan view and a detail of the Figo on an even larger scale »

The clock shown is denoted by 1 "Its transmission has a drive wheel 2 of the second hand, which is driven by a drive 3 * The second hand, not shown, sits on the shaft of wheel 2. Furthermore, two coaxial wheels are arranged one above the other."

The lower _s with 4 designated wheel is driven in the direction of the arrow 11 by the movement and turn drives the upper * 5 designated wheel, this wheel 5 is supported freely rotatably 6 of the wheel 4 on the end of the axle. The two wheels are connected to one another by a spiral spring 7 * the inner end of which is attached to the axle 6 and which, from seres ~ Bnä @ at 8, is attached to the wheel 5. The wheel 4 has a somewhat larger diameter than the wheel 5, but both have the same number of teeth, which is the same as the number of teeth on the wheel 2 which drives the second hand 5 together and seeks to prevent their lirehung in the direction of arrow 11. One arm of the wheel 4 also carries a pin 12 _S which serves as a stop for an arm of the wheel 5 "Some of these last-mentioned arms have inherited 13" which are intended as a stop limit for the pin 3-2. The depth of these notches is different in each arm change »depending on which arm is chosen to work with the pen. A locking member 14 works together with the wheel 2 to prevent any play of the second hand after each of its incremental Yoriärt rotations *

The working method is as follows © ι

The wheel 4 is in the direction of the arrow 11 by the movement of driven * In Figure _e 4 of the tooth has been released 4a of the wheel 4 straight from the pawl 9 * which is liked by his abgleitend before the tooth 5a of the wheel 5 and now the wheel 5 holds j while the wheel 4 driven by the clockwork continues to move step by step. Here, the next © tooth is then 4b of the wheel 4 gradually to catch 9, as indicated under step every 5.1 seconds "If this tooth 4b reaches the pawl 9 _# he lifts it _s ^ © - through is so far retained tooth 5a is released * The wheel 5 then runs under the action of the spiral spring 7 to the gradually preceding wheel ^ and the tooth 5a comes back close to the tooth 4a, but remains: but a little back ^ thanks to the pin 12 * so & ass the pawl 91 if j et bt the tooth 4b passes under it »again a tooth f of the wheel 5 falls down (7ig * 4) · The 9 is lifted with every 5 * step of the wheel 4 ₉ whereupon the wheel 5 brings up the five switching steps of the wheel 4 at once the second hand Adjusted by a full second via pinion 3 and second wheel 2

The pawl 9 can be replaced by a sliding one * with the effect of a stop subject to every one *

Claims (9)

, P A 2EIIAISPRuC H 1) Device for stepping of the second hand of Uhrwerkgetriebea ,, characterized by two seconds Eiger ~ & etriebe arranged ©, by an elastically-resilient demanding coupling (7) and, by corresponding stops (12 _S 13) in an adjustable relative position slightly offset au each held equiaxed © baths (4, 5) with the same number of teeth, of which the Had (4) driven by the clockwork has a slightly larger diameter than the elastically resiliently coupled tracking wheel (5) »while both are supported by a stopping device (9) can be influenced, which the idler wheel (5) always holds until the passage of the next tooth (4a, 4b etc.), the clock-driven wheel (4), whereby the holding element (9) is raised just enough * that the previously held tooth (5a, 5b, etc.) of the laughing wheel (5) is free and this is the voraufgewangeneη Einelschaltsehritte the clockwork-driven Hades (4) in a summarized switching movement on the S second hand wheel (2) transfers 2} device according to. Claim 1, characterized in that the trailing wheel (5) on the axis (6) of the clockwork-driven η wheel (4) is loosely rotatable and the inner end of the elastic coupling (7) on this axis (6) and its from seres End is attached to the trailing wheel (5). 3) Device according to claims 1 and 2 ₉ characterized »characterized ^ that one of the anae of the clockwork-driven wheel (4) carries a pin (12) on which an arm of the trailing wheel (5) occurs after each of its intermittent rotary movements 4) Device according to claims 1 and 3? characterized in that at least some of the arms of the trailing Hades (5) have a notch (13) _? which is intended as a stop for the pin (12) "and each of these notches having a different depth, such _p that Mi e by DAB impingement of a © the other of the arms on the pin (12) certain position of the two wheels (4 ' 5) to each other at the end of the intermittent rotations of the trailing wheel (5), by selecting the impact arm. It can be "changed" - 7th In 5) Yorrtohtung according to claim ₉ characterized I _t that the trailing wheel (5) has a drive (3) drives _{s β} which in turn the drive wheel (2) of the second hand driving 6) Device according to claims 1 and 5 »characterized in that a locking member (14) with the drive wheel, (2) the second hand cooperation et. 7) Device according to claim 1 characterized in _{$ s} that the stop member is a pawl (9) * 8) Door direction according to claim 1, characterized in that the stopping element is a sliding stopper » 9) Apparatus according to claim l characterized in _{t s} that is the two wheels (4, connecting spring, a spiral spring 5) (7).