Syringe for medical use of the disposable type provided with a hollow cap (40; 60; 60') that can be superimposed to the needle to protect it after carrying out the injection; the internal surface of the cap, close to its opening, and the external surface of the collar (44) for needle connection to the syringe have a substantially complementary shape. Close to the opening of the cap cavity, members 48, 61) are provided that firmly engage the collar (44) of the needle when it is forced into the ca...

A radio frequency interference (RFI) protected flip-flop is described in an RFI environment of a computer controlled test area for mass produced articles. The RFI protected flip-flop includes an integrating feedback capacitor for each inverter device of the flip-flop.

A telephone in which the closure of the hookswitch energizes a relay that seizes the telephone line and initiates the operation of a sequential switching means if the sequential switching means is in the first of three rest positions. The operated sequential switching means advances to the second rest position wherein an automatic dial may be activated to call a single preselected telephone number and the activation of the dial advances the sequential switching means to the third rest position. ...

A radioisotopic heat source including a container with plurality of closed chambers cooperating to preserve integrity of the contained radioactive heat source against impacts, projectiles, extreme temperatures, and other various environmental conditions pertaining to missiles for carrying the heat source into outer space and landing it on the moon.

In connection with installations comprising articles housing or conducting corroding material, or in connection with substantially pipe- or hose-shaped articles which are to be protected against fire, for example a propulsion motor in a vehicle, it is in accordance with the present invention suggested, rather than using steel pipes and/or steel containers, to use plastic articles which by nature is corrosion resistant. Plastic articles which preferably are pipeshaped (1) are insulated by means o...

Device for the protected storage of objects, comprising a closable container having an electrical security shield enclosing a storage space, damaging means (10) for rendering the objects useless, and means (4) for feeding in from the outside a command which disables the damaging means (10), the security shield comprising one or more electrical systems which at least togther extend over essentially the entire surface of the shield and which cooperate with a processing circuit (14) which detects a...

An electrical pulse modulator having a saturable reactor and a shunting capacitor in addition to the known pulse-forming network. The saturable reactor is in service with a discharge triggerable solid-state device and causes the circuit to operate within the rating of the same by initially switching the current "on" at discharge, thereby reducing the di/dt requirement upon the device. The saturable reactor and the capacitor in shunt thereto also act as a second pulse-forming network. When the re...

6-Aminoacylamidopenicillanic acid or 7-amino-acylamidocephalosporanic acids are produced in high yields by acylating 6-aminopenicillanic acid or 7-aminocephalosporanic acid with an amino acid, or a functional equivalent thereof, having its amino group protected with N,N-disubstituted .beta.-keto acid amide, and then removing the protecting group from the resulting protected 6-aminoacylamidopenicillanic acid or protected 7-aminoacylamidocephalosporanic acid by hydrolysis.

A tornado protected cooling tower. The tower includes a plurality of enclosed cooling cells arranged about the periphery of an open cooling basin. Each of the cells includes a cool air inlet along the side thereof opposite the open cooling basin and a warm air outlet along the side thereof adjacent the open cooling basin. A plurality of fans are mounted within each of the cells along the side thereof adjacent the open cooling basin in direct communication with the warm air outlet. Each of the ce...

An earth tieback comprising a steel tendon rod anchoring a structure to the earth, the tendon rod having double corrosion protection provided first by a thin hard coating of corrosion resistant plastic throughout its length and second by concrete grout over the anchor zone of the rod and by a heat shrunk plastic tube tightly encapsulating the unbonded zone of the rod.