Abstract: An installation for the acquisition of photographic portraits formed of a booth delimiting an inner space, including: a first wall delimiting a portion of the inner space of the booth, at least a portion of the first wall being transparent; a photographic apparatus or camera arranged behind a transparent or semi-transparent portion of the first wall, said device comprising a field of view directed towards the inside of the booth and having its focal plane located inside of the booth; at least one light-emitting device arranged behind a transparent portion of the first wall, capable of illuminating the inside of the booth. It comprises an additional light-emitting device, comprising at least two light-emitting surfaces, illuminating the inside of the booth and respectively arranged on a second and a third walls facing each other and delimiting the inner space of the booth.

Abstract: A liner assembly for the discharge end of an ore comminuting mill is disclosed. The discharge end is defined by an end wall having a plurality of bolt holes formed therethrough in a predetermined pattern for attaching the liner segments to the inner surface of the end wall. Each liner segment is formed with a plurality of bolt holes capable of being aligned with the bolt holes in the end wall. A locator pin projecting from the mounting surface of the liner segment is sized and configured to project into one of the end wall bolt holes, and it is positioned relative to the bolt holes in the liner segment so that upon such insertion the bolt holes of the liner segment automatically align with those of the end wall.

Abstract: A liner assembly for the shell or drum of an ore grinding machine is disclosed with an insert used to facilitate its removal. The liner assembly comprises a plurality of liner segments mounted in side-by-side relation, with adjacent liner segments defining a pocket therebetween of generally triangular configuration. A wedge-shaped insert is disposed within each pocket to reduce the amount of particulate matter entering the pocket and to protect the inner surface of the shell. The wedge-shaped insert is formed from resilient material and includes a recess or groove taking the form of an inverted V extending upwardly from its bottom surface. The recess enables the insert to internally collapse if the pocket is of lesser cross-sectional dimension than that of the insert.

Abstract: In one embodiment, concaves for gyratory crushers are formed in a trapezoidal or triangular shape to achieve essentially three-point contact with an external shell of the gyratory crusher. In a further embodiment, concaves for gyratory crushers are provided with adjustable pads whose position with respect to the back surface of the concave can be changed. In a further embodiment, concaves for gyratory crushers are provided with alignment pads that are inserted between the back surface of the concave and the external shell of the gyratory crusher. In a further embodiment, concaves for gyratory crushers are provided with removable fastening member such as bolts that engage the back surface of the concave to mount the concave to the external shell of the gyratory crusher. The concaves of the present invention can provide secure mounting of the concaves in place to promote longer wear life and are easily removed for replacement.

Abstract: A segmented liner assembly and liner segment fastening system is disclosed for the rotatable shell of an ore grinding machine, the shell having a plurality of mounting bores formed therethrough. The liner assembly consists of a plurality of liner segments each of which has one mounting bore that extends into the body of the segment from its mounting surface and a mounting recess having a transverse size greater than that of the mounting bore which extends from the mounting bore to the grinding surface. A threaded member extends through a mounting bore of the shell and an aligned mounting bore of the segment into the recess of the segment and externally of the shell. The threaded member is screwed into a nut that is seated at the base of the mounting recess. In a first embodiment, the threaded member has an integrally formed wrenching head enabling the threaded member to be rotated and screwed into the nut, thus drawing the liner segment tightly against the inner surface of the shell.

Abstract: A photographic camera has two guides for engaging mutually opposite edge portions of photographic film at an exposure plane where the film is exposed to take a photograph. The guides are movably mounted so that they can be temporarily retracted for the exposure, so that the edge portions of the film are also exposed to take the photograph, which is thus `borderless`.