A mailbox of the type that is located outdoors and is exposed to all weather conditions has an access aperture with a door adapted to selectively open the aperture for removal of mail in the mailbox. A lock mounting arrangement is provided to permit the mailbox to be locked to prevent unauthorized removal of the mail. In addition, a mail slot sufficiently large to permit the insertion of mail but small enough to prevent access for removal of the mail is provided. A pivoted flap covers the mail s...

A utensil adapted to be positioned upon the rim of a cooking vessel has two annular channels, one open toward the center, the other open toward the top. The upper wall of the first channel defines the bottom of the second channel. A plurality of apertures in the bottom of the second channel communicate with the first channel, these apertures being closer to the outer than to the inner wall of the second channel.

The present invention is an apparatus for preventing gas leakage from gas burning equipment, which comprises an electromagnetic valve which normally closes the gas passage near the gas supplying source, a gas pressure detector for measuring the gas pressure in the gas passage to detect a defect in the piping, at least one gas burning system having electrical circuits for detecting gas leakage other than that caused by defects in the piping, and a control panel for receiving all of the detection ...

An effective antifouling result with respect to marine creatures such as barnacles is achieved by energizing a piezofilm layer carried on the outside of a vessel to cause mechanical vibration of the layer.

A tamper preventing tumbler lock which provides an alarm signal or prevents lock activation when any electrically conductive object, such as a pick or the like, is inserted in the keyway. The lock includes a pair of electrically conductive tumblers which complete an electrical path to activate the alarm or to activate a solenoid operated latch to prevent rotation of the lock cylinder or actuate an associated lock bolt when the conductive tumblers are bridged by the conducting object in the keywa...

A gasket for use in the cylinder head of an internal combustion engine comprises a metallic spacer member which is fitted into each through bore or clearance hole of the gasket for insertion of the shank of a a head bolt, said spacer member having a height dimension taken in the thickness direction of the gasket that is smaller than the gasket thickness gained when the gasket is compressed by normal fastening of the head bolt.

The present invention relates to new compositions, containing as active ingredient 4-nitro-5-carbamoyl-imidazole derivatives, which compositions are for the treatment and prevention of coccidiosis in poultry. The 4-nitro-5-carbamoyl-imidazole derivatives correspond to the following general formula I ##STR1## wherein R.sub.1 and R.sub.2 each independently represent hydrogen, or an alkyl radical having 1 to 4 carbon atoms.

A tractor is given some vertical play between the front wheel supported carriage and the tractor frame. One or more downwardly spring-biased rods recipocatingly supported by the frame each have its lower end in contact with a portion of the carriage and its upper end operatively supporting the operating lever of a normally open switch to hold the switch closed. The switch is connected between the tractor battery and the engine coil so as to cut off ignition to the engine when the front end of th...

A control is disclosed for inhibiting the tilting of an earth drilling machine that is supported on hydraulic jacks. A hydraulic downfeed motor for the drill string is operated by a control that has pressure responsive switches connected to the hydraulic jacks, and in the event the drilling machine starts to rise upwardly during drilling one of the pressure responsive switches will operate to shut off fluid pressure to the downfeed motor and to entrap fluid within the motor. The entrapment of fl...

A ski is provided with an upstanding member or body at the forward end thereof, at the junction of the upwardly turned tip with the generally horizontal or flat body of the blade, to prevent crossing of the skis in parallel-ski turning, etc. the appliance or member is secured to the ski through a cushion layer with adhesive and has upwardly converging flanks extending from the lateral edges of the blade.