CHAMBER ACCESSORY AND CHAMBER Russian patent published in 2015 - IPC G03B17/14 

FIELD: machine building.

SUBSTANCE: present invention relates to the chamber and chamber accessory connected to the chamber with possibility of replacement, such as replaceable lens. Specified group of inventions contains the chamber accessory with possibility of the detachable connection to the chamber, and chamber to which the chamber accessory is connected detachably. At that the chamber accessory contains: accessory securing with possibility of the detachable connection with chamber fixture made in the chamber, at that the accessory connection is made with bayonet shoulders of the accessory, and is switched due to relative rotation using the chamber fixture from the first state, where each of the bayonet shoulders of the accessory is inserted between the bayonet shoulders of the chamber made in the chamber fixtures, to second position where the bayonet shoulders of the accessory engage with the bayonet shoulders of the chamber to complete connection of the accessory and chamber fixtures; and many contact surfaces of the accessory located in direction of the relative rotation of the accessory and chamber fixtures in the accessory fixture, where the contact surfaces of the accessory include the first contact surfaces of the accessory used to indicate type of the chamber accessory, and with difference that the first contact surface of the accessory is made adjacent to the bayonet shoulder of the accessory, at that the first contact surface of the accessory is connected with resistor having specified resistance corresponding to the type of the chamber accessory.

EFFECT: prevention of damage of connection of contacts determining type of the accessory made in fixtures.

25 cl, 1 tbl, 16 dwg