Rolling gates cylinder lock

Claim 1

A lock comprising a casing open at its top and provided with a bottom wall, two longitudinal walls integral with said bottom wall and two side walls integral with said bottom wall and said longitudinal walls; a guide block secured by means of screws to the bottom wall of said casing; said guide block being provided with a first longitudinal slot on its side facing said bottom wall, and with a second slot on the same side and communicating with said first slot; a circular recess formed in said block on its side opposite to the said slotted side, the bottom of said recess being provided with a through passage in communication with said second slot; two apertures in the side walls of said casing in alignment with the first slot of said block; a sliding bolt disposed in said first slot, with its ends projecting out of said apertures in the side walls of the casing; a rack bar inside of said casing secured by means of screws to said sliding bolt; a lock cylinder mounted with its rear end in said circular recess in the guide block and secured thereto by means of screws, said cylinder being provided with a rotating key-operated plug provided with a square extension extending through said through passage formed in the bottom of said recess in said second slot; a pinion housed in said second slot and keyed to said square extension, said pinion being in mesh with the toothed portion of said rack bar; a cylindrical cap member disposed around the fore end of said cylinder projecting from said recess in the guide block, said cap member being secured to the guide block by means of screws; a counter plate having a plane contour conforming to the plane contour of said casing, and provided with a bore for the passage of the said cylinder portion and the cap member thereof, and nut and stud bolt means for clamping together said plate and said lock casing with interposed gate element.