Abstract: A portable workstation has an integrated container, hand truck, and easily removable ladder. Wheels or casters are provided to make the device easily portable. An integrated removable ladder is used to push and guide or steer the device. The combination yields a portable workstation.

Abstract: The method of encoding a given recorded signal made up of a host of different frequencies comprises modifying the recorded signal to selectively alter in a known manner a portion of the recorded signal to produce a machine recognizable start code which is generally unperceptible to human recognition when the recorded signal is played in its intended manner. The signal is scanned and immediately after the start code, an identity code is generated based on the particular signal characteristics which collectively are unique to the recorded signal and by means of which the recorded signal can be identified. A recorded signal which has been encoded in accordance with this method has a start code which can be machine recognized during playing of the recorded signal. This recognized start code locates a portion of the signal used to identify the same.

Abstract: A flushing mechanism is disclosed for use in the tank of a toilet, utilizing a spool valve to accommodate various fluid pressures and to accomplish accurate control of volumetric flow. A housing is provided in the toilet tank, defining an inlet port which is adapted to be connected to the source of flushing fluid, e.g. water, and also defining a vertical valve chamber extending somewhat transverse to the inlet port and connected to control the discharge of water from the valve and out of the tank to the toilet bowl. The spool valve is provided in the valve chamber such that the facing surfaces of lands on the spool are subjected to the pressure of the flushing water source, to maintain a balance. Manual means is disclosed for displacing the spool valve to supply flushing water from the source while activating a hydraulic timer which, in due course, resets the spool valve. In the disclosed embodiment, the hydraulic timer involves a bleed tube for supplying water to the tank which contains a float.