Abstract: The invention relates to safety razors having blade units carried on a handle, an electrical arrangement including an electrically operated vibration device, and a control device for actuating the vibration device when the blade unit is moved into contact with or into close proximity to the skin of a person holding the razor, a battery accommodated in the handle, a switch for connecting the electrical arrangement to the battery, and optionally, a light emitting diode for illuminating a section of handle neck to indicate that the electrical arrangement is connected to the battery and ready to actuate the vibration device.

Abstract: The invention relates to safety razors that include a blade unit carried on a handle, a vibration device powered by a battery under control of a control device, and a switch, e.g., included in the handle, to switch on and off an electrical connection between the battery and the control device; a storage tray on which the razor is stored when not in use including a magnet so that the switch closes a connection between the battery and the control device when the razor is separated from the storage tray.

Abstract: A hydraulic bolt tensioner in the form of an annular hydraulic jack includes a bridge piece constituted by a plate assembly having at least one support leg which in use serves to transmit the reaction from the piston and cylinder of the jack to hardware associated with the bolt which is to be stressed. The support leg is preferably axially adjustable in length.