The invention relates to an apparatus which may be used in saturation determinations. The instrument comprises a reaction compartment and a separating compartment separated from the reaction compartment. The reaction compartment is provided with a wall portion which may be rendered permeable to liquid, thereby enabling the contents of the reaction compartment to flow to the separating compartment.

A control circuit for controlling an automatic rhythm generating circuit of an automatic rhythm performance apparatus comprises a memory for controlling the rhythm start or stop operation of the automatic rhythm generating circuit by an output state, a rhythm performance control signal supply circuit including a plurality of rhythm performance control switches, and a logic circuit having inputs coupled to the outputs of the rhythm performance control signal supply circuit and to the outputs of t...

A semiconductor wafer vacuum chuck used as part of a photographic wafer-alignment machine for performing contactless photolithography has integral spacer means disposed on a substantially planar surface thereof for mechanically maintaining a fixed distance between portions of a wafer positioned adjacent the spacer means and the surface of the wafer chuck, whereby a controlled separation is provided between a surface of the wafer and a photographic mask overlying the surface of the wafer upon the...

A method for performing authentication in a communication system comprising an authentication server, and a user profile store storing user profiles for users of the communication system, the method comprising: transmitting from the authentication server to the user profile store a request for the user profile of a user; receiving at the authentication server a response to the request; determining whether the response is indicative of an error; and if the response is indicative of an error, tran...

Apparatus for handling samples of material wherein a first transport system intermittently moves units of the material in small steps and a second transport system receives sample portions of said units and intermittently moves these portions in larger steps; both systems operating with the same cadence.

A high speed mechanical-electric-hydraulic system for synchronizing the indexing and dwell of a multi-pocketed article aligning turret and the operation of an operating station with the forward and reverse strokes of a hydraulically actuated reciprocable feed slide which transfers successive articles into and out of the operating station from and to the turret, wherein during separate angular portions of a single rotational cycle of a rotating drive means of the system, a primary electrical comm...

A pair of differently encoded function mechanisms each for operating the line feed mechanism of a printer and a pair of strippers one of which resets one of the function mechanisms after a single line feed operation and the other of which resets the other of the function mechanisms after more than one line feed operation. Similarly, a second pair of differently encoded function mechanisms each for operating the reverse line feed mechanism of the printer which are individually reset by the stripp...

In a machine for performing work characterized by a manipulator arm having a working hand rotatably carried in a frame rotatably mounted in a support and gear train means for rotating the hand, the frame and the support to permit bending and swivelling motions of the hand. A transmission gearing arrangement is provided between the frame rotating means and the hand rotating means to prevent rotating the hand through rotating the frame, and another transmission gearing arrangement connects the sup...

Hypodermic ampoules of the contained-needle type, a method of assembling and filling such ampoules, and combinations of such ampoules with so-called "applicators" for actuating the ampoules to make injections are disclosed. Each of several ampoule forms has at least one cylindrical, medicament-containing chamber and a plunger closing one end thereof. A hollow needle is fixed to the plunger and is initially contained within such a chamber. The other end of the ampoule is sealed by a diaphragm whi...

A method and article for performing an aneurysm repair is the subject of the present invention. A prosthetic graft is utilized to replace the damaged segment of the blood vessel. The graft is characterized by being movable from a collapsed formation of a diameter less than the diameter of the vessel to an open formation of a diameter approximately equal to that of the vessel. A plurality of radially spaced anchoring pins are located adjacent each end of the graft and provide means for securing t...