Chain operator for a window

A chain operator for a window comprising, a chain, a casing having an internal chain storage area, said casing including a base and a two-part cover, said base having a chain guide track terminating in a chain exit, a drive sprocket rotatably mounted on said base and engageable with said chain, one part of said cover overlying the chain storage area of the casing, the other part of the cover overlying the drive sprocket and the chain exit and having drive means engageable with the drive sprocket.

A chain operator for a window comprising, a casing having a chain storage area including a chain guide track having a curved portion extending to a chain exit from the casing, a drive sprocket in said casing engageable with said chain, drive means connected to said sprocket for converting a power input into rotation of said drive sprocket, a chain mounted in said casing with an end positioned outside the chain exit from the casing, a sash bracket carried by said end of the chain and having a pair of spaced ears with aligned openings, and quick release means releasably connecting the sash bracket to said end of the chain including a removable U-shaped sash pin having a leg passing through said aligned openings.

A chain operator for a window having a casing from which a chain is extendable for positioning a window, said chain comprising a plurality of solid links and a plurality of U-shaped links, said U-shaped links being positioned in end-to-end abutting relation, said solid links having a thickness to closely fit within the U-shaped links, and rivets with large heads pivotally interconnecting the opposite ends of a solid link to a pair of U-shaped links.

A chain operator for a window utilizing a chain which is movable between a straight rigid motiontransmitting configuration and a curved configuration comprising, a series of solid links in spaced end-to-end relation to provide a sprocket tooth-receiving space therebetween, each of said solid links having a pair of openings adjacent their ends, a series of U-shaped links alternating with said solid links, each of said U-shaped links having a central part with a pair of spaced-apart side walls and a bridging section positioned to span three sides of an aforementioned sprocket tooth-receiving space, said link side walls having parts extending beyond said bridging section to lie closely adjacent a solid link therebetween and with the side wall parts of adjacent U-shaped links completely overlapping a solid link, said ends of the side wall parts being in substantially abutting relation, and a plurality of members extending through the side wall parts and the openings to pivotally interconnect the links, each of said solid links having a part positioned to abut the ends of a pair of bridging sections of adjacent U-shaped links when the chain is in the straight configuration to prevent movement of the chain past said straight configuration.