Abstract: A motor brake includes an actuator fixed to a motor shaft and including spaced peripheral ears including a member therethrough. A fixed plate includes spaced detents and an output about the actuator has spaced ball releasably urged into the fixed plate detents by the actuator ear members. The output has channels for the actuator ears for driving the output with the actuator when the actuator ear members release the output spaced balls from the fixed plate detents.

Abstract: A motor brake includes an actuator fixed to a motor shaft and including spaced peripheral ears including a member therethrough. A fixed plate includes spaced detents and an output about the actuator has spaced ball releasably urged into the fixed plate detents by the actuator ear members. The output has channels for the actuator ears for driving the output with the actuator when the actuator ear members release the output spaced balls from the fixed plate detents.

Abstract: A milling device is disclosed for the preparation of microscopy specimens or other surface science applications through the use of ion bombardment. The device provides the ability to utilize both gross and fine modification of the specimen surface through the use of high and low energy ion sources. Precise control of the location of the specimen within the impingement beams created by the ion sources provides the ability to tilt and rotate the specimen with respect thereto. Locational control also permits the translocation of the specimen between the various sources under programmatic control and under consistent vacuum conditions. A load lock mechanism is also provided to permit the introduction of specimens into the device without loss of vacuum and with the ability to return the specimen to ambient temperature during such load and unload operation. The specimen may be observed and imaged during all active phases of operation.

Abstract: A milling device is disclosed for the preparation of microscopy specimens or other surface science applications through the use of ion bombardment. The device provides the ability to utilize both gross and fine modification of the specimen surface through the use of high and low energy ion sources. Precise control of the location of the specimen within the impingement beams created by the ion sources provides the ability to tilt and rotate the specimen with respect thereto. Locational control also permits the translocation of the specimen between the various sources under programmatic control and under consistent vacuum conditions. A load lock mechanism is also provided to permit the introduction of specimens into the device without loss of vacuum and with the ability to return the specimen to ambient temperature during such load and unload operation. The specimen may be observed and imaged during all active phases of operation.