Abstract: An approach is disclosed that receives, at a computer system, a set of biometric data readings pertaining to a user of the system. The biometric data readings are received from biometric sensors that are near the user. After receiving the biometric readings, an audible notification is transmitted to the user. Subsequently, a second set of biometric data readings pertaining to the user from the biometric sensors that are proximate to the user. The first and second sets of biometric data readings are compared with the comparison resulting in a confidence level that the user heard the transmitted audible notification. The audible notification is retransmitted in response to the confidence level being below a threshold not retransmitted in response to the confidence level meeting the threshold indicating that the user heard the first transmission.

Abstract: An operator cab for a machine such as a motor grader includes an access door coupled to a frame by way of a hinge mechanism. The hinge mechanism has abutting cam and follower surfaces with geometry to control the swinging of the access door such as under the force of gravity. The cam surface has a double-sloped profile of rotation about the pivot axis of the hinge mechanism so that the access door swing is controlled in either of a first or a second swing direction toward a dwell location of the access door.

Abstract: An operator cab for a machine such as a motor grader includes an access door coupled to a frame by way of a hinge mechanism. The hinge mechanism has abutting cam and follower surfaces with geometry to control the swinging of the access door such as under the force of gravity. The cam surface has a double-sloped profile of rotation about the pivot axis of the hinge mechanism so that the access door swing is controlled in either of a first or a second swing direction toward a dwell location of the access door.