Abstract: An auto-charging alert device for a rotatable pneumatic object includes an alert unit for generating a warning signal when an interior pressure of the rotatable pneumatic object is below a predetermined threshold, and an auto-charging unit which includes a charger housing and a charging arrangement. The charging arrangement includes an electric supply unit received in the charger housing and electrically connected with the power inlet of the alert unit, and a kinetic power generator received in the charger housing to electrically connect with the electric supply unit for converting a kinetic energy of the rotatable pneumatic object into electrical energy to be stored in the electric supply unit, such that the electric supply unit is automatically charged to supply adequate electricity to the alert unit for ensuring a proper and consistent operation of the alert unit.

Abstract: An alert device, which is adapted for mounting to a valve of a pneumatic object, is capable of detecting any decrease in the interior pneumatic pressure of the pneumatic object and generating a warning signal immediately therefor. The alert device includes a signal arrangement and a connector, wherein the signal arrangement includes a cap, a signal generator fittingly received in the cap, and a power supply arrangement comprising a first contact unit and a second contact unit, and the connector comprises a power inlet and a power outlet.

Abstract: An alert device, which is adapted for mounting to a valve of a pneumatic object, is capable of detecting any decrease in the interior pneumatic pressure of the pneumatic object and generating a warning signal immediately therefor. The alert device includes a signal arrangement and a connector, wherein the signal arrangement includes a cap, a signal generator fittingly received in the cap, and a power supply arrangement comprising a first contact unit and a second contact unit, and the connector comprises a power inlet and a power outlet.

Abstract: An alert device, which is adapted for mounting to a valve of a pneumatic object, is capable of detecting any decrease in the interior pneumatic pressure of the pneumatic object and generating a warning signal immediately therefor. The alert device includes a signal arrangement and a connector, wherein the signal arrangement includes a cap, a signal generator fittingly received in the cap, and a power supply arrangement comprising a first contact unit and a second contact unit, and the connector comprises a power inlet and a power outlet.

Abstract: An alert device, which is adapted for mounting to a valve of a pneumatic object, is capable of detecting any decrease in the interior pneumatic pressure of the pneumatic object and generating a warning signal immediately therefor. The alert device includes a signal arrangement and a connector, wherein the signal arrangement includes a cap, a signal generator fittingly received in the cap, and a power supply arrangement comprising a first contact unit and a second contact unit, and the connector comprises a power inlet and a power outlet.

Abstract: An electronic signal device for a set of pneumatic tires of a vehicle includes a plurality of pressure gauges, each respectively attached to the pneumatic tires, each pressure gauge having a cap unit which houses a switching unit responsive to the pressure in the respective tire and a signal transmitting unit electrically connected to the switching unit and activated when pressure in the tire is deficient. Each tire is represented by a binary code which is transmitted to a receiver circuit when said tire is deflated below a predetermined proper pressure. The receiver circuit is found inside the driver room of the vehicle and is electrically connected to a display means.

Abstract: An extinguisher includes a mounting seat fixed in the driver's cab of an automobile near the driver's seat, an extinguisher body mounted removably on the mounting seat, a resilient element depressing the push-button type switch of the extinguisher body, a hose extending from the driver's cab to the engine compartment in communication with the spray-opening of the extinguisher body, and a nozzle disposed at the end of the hose and directed to the automobile engine. When a safety lock is pulled away from the extinguisher body, the fire-extinguishing substances contained in the extinguisher body spray from the nozzle due to the fact that the switch is depressed by the resilient element.

Abstract: A pre-impact alarm apparatus which is adapted to signal the driver of a motor vehicle that obstacles exist in the path of the car while said car is backing up. The pre-impact alarm apparatus has a flexible sensing bar to be installed at a rear cover of a car which generates a signal that activates a buzzer to warn the driver when making contact with an obstacle, therefore improving upon the infrared alarm apparatus which can not warn the driver when the car is approaching an obstacle at an angle.

Abstract: The present invention relates to a hook seat comprising a seat body having a front side, a rear side and a channel between the front side and the rear side, the rear side including a peripheral portion and a recess defined by the peripheral portion; the channel possibly having an enlarged mouth at the front side. In addition, the front side may have a peripheral flange for engaging with a hook cover and a depressed portion surrounded by the peripheral flange, causing the mouth to be extruded from the depressed portion and be flush with the peripheral flange.

Abstract: A scale utilizing an oil pressure gauge for displaying the measured weight is disclosed. In the scale, there is an apparatus for intermediate transmission of sensed pressure representing the weight applied on the scale. The apparatus includes a bellows-shaped envelope having an open end and a sealed end and forming a chamber therein for containing hydraulic oil, a base member connected to the open end of the envelope and an air leakage member positioned on the sealed end of the envelope. There is an oil passage formed in the base member to enable the hydraulic oil in the envelope to flow out. An annular clamp is used for the connection of the base member and the envelope. A knob is connected to the air leakage member to block the air passage. The apparatus for intermediate transmission of sensed pressure may further include a plurality of rigid metal retainers outside of the envelope for preventing the same from overly deforming in a radial direction.

Abstract: The invention provides a combined cap and signal device to be attached to a tire after the tire is inflated. The device includes an electric alarming unit mounted in a cap-like casing which incorporates an adaptor to be threadedly connected to an inflating valve of the tire. A resilient disc is disposed in the adaptor to be forced by air so that the disc causes the circuit of the electric alarming unit to be opened when the tire is not deflated.

Abstract: A pressure gauge comprising a diaphragm, a cylinder seat, and a driving helix movable up or down to constitute the operating elements. A rotary shaft with a pin fixed thereon rotates clockwise or counterclockwise responsive to the movement of the diaphragm. The rotary shaft will return to its initial position when the pressure on the diaphragm is removed by the restoring force of a helical spring.