THE ESCAPEMENT TESTER
The Escapement tester is a device that allows very precise adjustment of the position of the pallet stones in the fork of the Pallets (lever) during Escapement-making (finishing) operations. This allows the value of the total depth to be corrected. An adjustment essential to the proper functioning of the Escapement.
The Escapement tester is used for pallets (lever) whose pallet stones are cemented into their pallet arms with shellac or with an adhesive that becomes fluid under the effect of heat.
The Pallets (lever) whose Pallet stones are to be regulated are firmly held to the frame of the Escapement tester by a vertical support (1).
The Escapement tester is positioned on a heating plate that allows the shellac or glue to be softened, thus enabling the Pallet stones to be moved. An adjustable lever (2), set by a Screw (3), makes it possible to lock the back of the Pallets (lever) arm. A feeler (4) comes into contact with the Impulse face of the Pallet stone under the effect of a light spring.
The feeler is fitted with a lever, at the end of which a rack allows the position of the feeler to be displayed, by means of a Dial and a Hand (5), with an accuracy of about 1/100 mm.
To push in a Pallet stone, pressure can be applied to the feeler, which will push it inside its clamp.
To push out a Pallet stone, simply push it from behind using a fine point.
The constant contact of the feeler of the Escapement tester against the Impulse face of the Pallet stone makes it possible to know, at every moment and with great accuracy, the exact position of the Pallet stone.
This page has been automatically translated from the French reference version using an artificial intelligence tool. Errors or inaccuracies may remain. If you notice any, especially if this is your native language, please feel free to report them to info@horopedia.org. Your contribution helps us improve the quality of the encyclopedia.
Pending their translation, images and videos remain temporarily displayed in French.
Thank you for your understanding.