Abstract 1,131,205. Date indicators. ETA A.G. EBAUCHES-FABRIK. Feb.4, 1966 [April 20, 1965], No.4965/66. Heading G3T. A calendar watch possessing an instantaneous date changing motion comprises a date indicating ring 7, capable of being driven by the watch movement and an entrainment member 9 carried by a driving spring 8 and operatively engaging the date indicating ring, the driving spring being mounted on a control wheel 5. The control wheel 5 is continuously driven by an hour wheel 2 via a reduction gear 6. The entrainment member 9 engages a tooth 10 of the date ring 7 so that as the wheel 5 rotates, the spring 8 tensions until the entrainment member reaches a rigid portion 20 of a hub 17 which is an integral part of the wheel 5. The force exerted by the spring on the tooth 10 then causes a detent 12, biased by a spring 15, to move out of engagement with another tooth and thereby allow the entrainment member 9 to advance the date ring 7. Reverse indexing of the date ring 7 during backward setting of the ravels is prevented by a cam surface 21 which pulls the entrainment member 9 out of engagement with the teeth 10.
IN A CALENDAR WATCH HAVING A WATCH MOVEMENT AND POSSESSING AN INSTANTANEOUS DATE-CHANGE MOTION, THE COMBINATION OF; A DATE INDICATOR, A DATE INDICATOR CONTROL WHEEL CAPABLE OF BEING DRIVEN BY THE WATCH MOVEMENT, A SHAFT UPON WHICH IS MOUNTED SAID DATE INDICATOR CONTROL WHEEL, A DRIVING SPRING CO-OPERATING WITH SAID DATE INDICATOR, SAID DRIVING SPRING INCLUDING A HUB PORTION SEATED UPON SAID SHAFT, AN ENTRAINMENT MEMBER CARRIED BY SAID DRIVING SPRING ENGAGEABLE WITH SAID DATE INDICATOR, SAID DRIVING SPRING BEING OPERABLY MOUNTED UPON SAID DATE INDICATOR CONTROL WHEEL, SAID DRIVING SPRING, SAID HUB PORITON AND SAID ENTRAINMENT MEMBER BEING FORMED OF ONE PIECE, SAID DATE INDICATOR CONTROL WHEEL TENSIONING SAID DRIVING SPRING ONLY WHEN SAID DATE INDICATOR IS AT STANDSTILL AND THEN SAID DRIVING BRINGS ABOUT FORWARD
Claim 2
Dependent Claim
127 words
IN A CALENDAR WATCH HAVING A WATCH MOVEMENT AND POSSESSING AN INSTANTANEOUS DATE-CHANGE MOTION, THE COMBINATION OF; A DATE INDICATOR, A DATE INDICATOR CONTROL WHEEL CAPABLE OF BEING DRIVEN BY THE WATCH MOVEMENT, A SHAFT UPON WHICH IS MOUNTED SAID DATE INDICATOR CONTROL WHEEL, A DRIVING SPRING CO-OPERATING WITH SAID DATE INDICATOR, SAID DRIVING SPRING INCLUDING A HUB PORTION SEATED UPON SAID SHAFT, AN ENTRAINMENT MEMBER CARRIED BY SAID DRIVING SPRING ENGAGEABLE WITH SAID DATE INDICATOR, SAID DRIVING SPRING BEING OPERABLY MOUNTED UPON SAID DATE INDICATOR CONTROL WHEEL, SAID DRIVING SPRING, SAID HUB PORITON AND SAID ENTRAINMENT MEMBER BEING FORMED OF ONE PIECE, SAID DATE INDICATOR CONTROL WHEEL TENSIONING SAID DRIVING SPRING ONLY WHEN SAID DATE INDICATOR IS AT STANDSTILL AND THEN SAID DRIVING BRINGS ABOUT FORWARD