A brushless electrical power generating system (100) in accordance with the invention includes an exciter (14) for producing alternating current from an exciter rotor; a rectifier (20) mounted for rotation with the exciter rotor for producing a rectified control current from the AC current; a common mode inductor (112), coupled to the control current, for cancelling common mode noise components within the rectified control current; and a main generator (22), having a rotating field winding (24) ...

A machine for use in teaching the manner in which a clock indicates time appearing more or less as a simulated clock can be constructed so as to utilize a support or housing holding a simulated clock face. Concentric shafts extending through the clock's face are used in conjunction with a mechanical structure for transmitting motion to couple simulated clock hands on the shafts with readout wheels. These wheels are rotatably mounted in the support behind windows through which limited portions of...

A process for the passivation of crystal defects or grain boundaries or internal grain defects or surfaces in an electrically conductive material in a plasma, where the passivation is carried out by the influence of suitable ions on the electrically conductive material to facilitate a shorter process time and lower stress on the electrically conductive material. A high-frequency gas discharge plasma is acted upon by a superimposed d.c. voltage which serves to accelerate the ions, suitable to car...

A toy clock intended for use by pre-school children, including a simulated clock face and simulated hands, and characterized by the provision of mechanism for producing repetitive audible signals corresponding to a time set on the face of the clock.

A short pitch, high speed track of high efficiency and low noise level. In one embodiment the major wear surfaces are on an integral shoe structure. In a second embodiment drive lugs, guide rails and roller engaging surfaces are formed on a separate replaceable part releasably secured to a shoe part. In a third embodiment the drive lugs and the guide rails are formed on a separate replacement part releasably secured to a shoe part.

A multiple windmill in which three fan wheels are mounted on a common rotatable frame and are each rotatably linked to a common fixed wheel or gear. The fan wheels are each rotated by the force of the wind and in turn rotate the common frame in which they are mounted. The device may be in the form of a display device such as an ornamental lawn device, with the exterior of each fan blade marked so as to create ornamental patterns when the blades and the frame are rotated by the wind. The common s...

A user, such as a clinician or the patient, uses a control device to manipulate at least one neurostimulation parameter. A mapping system uses a calibrated map to map the directional output of the control device to values of at least one stimulation parameter to allow the user to intuitively control the value of the parameter. In some embodiments, where a stimulation device is used to deliver spinal cord stimulation (SCS) therapy for example, the user manipulates a parameter to effect the locati...

A machine for forming T-shaped tubular components comprises a plurality of successive stations. A tubular blank having a forming material insert therein is positioned within a T-shaped die in a first station. A bulge is formed in the blank as force is applied to the ends or runs of the blank and the insert from opposing punches. Once the bulge or outlet of the T-shaped component is formed, a hollow pointed punch is driven through the outlet to open it. All of the punches are removed, the die is ...

A charge generation material for an electrophotographic photoconductor includes a titanyloxyphthalocyanine molecular aggregate. The titanyloxyphthalocyanine molecular aggregate contains between 0.006 to 1.000 water molecules per titanyloxyphthalocyanine molecule. The titanyloxyphthalocyanine molecular aggregate exhibits an X-ray diffraction spectrum, measured using CuK.alpha. radiation, having clear peaks at angles of 7.2.degree., 9.6.degree., 11.6.degree., 13.4.degree., 14.9.degree., 18.3.degre...

An electrical signaling device for providing intermittent and continuous indicating signals in response to first and second successive signals wherein an unstable multi-vibrator is switched by the first signal to activate an indicator and deactivated by the second signal to connect the indicating means directly to a source of power. The unstable multi-vibrator may alternatively comprise two and three transistors and the multi-vibrator output may alternatively be supplied to the indicating means ...