Abstract: An electrical phase checking apparatus includes a first voltage sensor, a first current sensor, a first binary indicator corresponding to the first voltage and current sensors, a second voltage sensor, a second current sensor, and a second binary indicator corresponding to the second voltage and current sensors. The first binary indicator is configured to indicate when a phase separation between a voltage waveform measured by the first voltage sensor and a current waveform measured by the first current sensor is not more than a first value, and the second binary indicator is configured to indicate when a phase separation between a voltage waveform measured by the second voltage sensor and a current waveform measured by the second current sensor is not more than a second value.

Abstract: A light show device includes a light source configured to generate a light beam having a substantially constant diameter, a container having a substantially transparent portion, a plurality of mirrors, each mirror connectable or connected to the container rotatably about at least one axis, and a particulate source configured to create inside the container a substantial suspension of particulates, where the device is configured to allow a reflection of the light beam between at least a majority of the mirrors.

Abstract: An inflatable electrical shocking weapon includes a hand portion, an inflatable extension configured to extend to an extension length upon inflation, and an electrical shocking device. The electrical shocking device includes a portable power source, a high-voltage generator connected to and configured to generate a high voltage from the portable power source, and at least two electrically conductive leads connected to the generator and configured to pass a current from the generator through a human at least when the human contacts the leads. The electrically conductive leads are connected to an end of the inflatable extension opposing the hand portion.

Abstract: A safe air-pressure-launched toy rocket system includes an air-pressure-launched toy rocket, a high pressure reservoir, a manual air pump connected to the reservoir and configured to enable a user to pump air into the reservoir to a high pressure, a valve connected to the reservoir and configured, when opened, to release high pressure air stored in the high pressure reservoir to the toy rocket to launch the toy rocket, and two releases configured to be operable by different hands of the user. The releases are connected to the valve in a series-open configuration, where the valve is closed only when both of the releases are operated.