A set screw having a cutting element provided on the outer end thereof for a "biting" engagement with the outer periphery of a pipe, or the like, the cutting element comprising a cutting edge adapted for a penetration of the pipe in a manner requiring minimum torque on the screw during the installation thereof.

A test set designed for testing meter reading units as well as telephone line connections for automatic utility meter reading systems. The test set is capable of simulating the meter reading apparatus when testing the telephone line and of simulating the telephone line when testing the meter reading components. The test set further simulates the receiving apparatus in the central office to test the combination of the meter reading apparatus and the telephone line. The test set is self powered by...

The television set which includes a separate modular video screen and a separate receiver both of a generally flat configuration with the video screen pluggable (connectable) at a plurality of outlets in the receiver wherein it is generally perpendicular to the receiver or in tandem therewith. The video screen being capable of fitting into different positions with respect to the receiver due to the connection therebetween.

In order to keep the opening for inserting a catheter into a blood vessel as small as possible, a catheter insertion tube is used which coaxially surrounds the puncturing canula and consists, at least in a circumferential area and/or at least along a portion of its length, of one or several dilatable or expandable areas permitting enlargement of its internal diameter. The diameter of the catheter insertion tube, at the front end where it is inserted into the blood vessel, is approximately equal ...

A casserole set includes a gas burner within a portable cooking stove, volcanic stones above the gas burner, and a transparent or semi-transparent pan comprising synthetic resins or heat resisting glass on the cooking stove. Cooking is accomplished by heating the volcanic stones with the gas burner.

A set square has substantially the form of a 30.degree./60.degree./90.degree. triangle having therein an aperture having sides at 15.degree. and 45.degree. to each external side. The aperture may be in the form of a 30.degree./30.degree./120.degree. triangle disposed with its longest side closest to the hypotenuse of the 30.degree./60.degree./90.degree. triangle and at an angle of 15.degree. thereto, said side diverging from the hypotenuse towards the 30.degree. vertex of the 30.degree./60.degre...

A writing set comprising a combination of paper printed thereon with two or more coloring bands using two or more types of leuco dye which develop different colors and a writing means which contains a solution of acid materials which develops the color of the leuco dyes. When characters, pictures, etc. are written on the paper, the colorless leuco dyes in the written portion develop color to form colorful characters, pictures, etc.

A telephone set which has a hands-free mode of operation is disclosed. The telephone set includes a telephone circuit connector to a handset and a hands-free circuit connected to a loudspeaker. A hook switch is mechanically operated in accordance with operation of the handset. A semiconductor switch is connected in parallel with the hook switch and is controlled by a control circuit. The telephone circuit or hands-free circuit is selectively connected to a pair of telephone lines through the hoo...

An improved telephone set of the type including a telephone body and a handset adapted to be placed on the former. The telephone body has a pair of engagement blocks incorporated therein of which part is projected outwardly of the telephone body and they are fitted into engagement recesses on the handset whereby the latter is firmly placed on the telephone body. At least the one engagement block has an engagement face which is adapted to come in contact with the engagement portion in the corresp...

A razor set comprises an L-shaped handle having one leg with slides for receiving a razor head, and the other leg to be grasped as a handle by the user. The other leg serves to support a razor head or a receptacle for a razor head to be detachably slidably inserted on the one leg. The receptacle can be provided in the other leg or can slide on the other leg, either parallel or perpendicular thereto.