Abstract: An electrostatic motor comprising a stator and a rotor, one of which is equipped with a plurality of lands to which a voltage is sequentially applied. The other of the stator and rotor is made of conductive material. Rolling contact is established between the stator and rotor along at least one line of contact. The rolling contact is controlled to repetitive first and second paths along first and second surfaces of the stator and rotor, respectively, in which the lengths of the first and second paths are different. Embodiments include a cylindrical motor, a flexible disk motor and a conical motor.

Abstract: A precisely aligned optical fiber switch assembly. A base member has a vee groove for supporting a fixed optical fiber and a second optical fiber in optical alignment with the fixed fiber. The groove contains sections of different dimensions that receive and align sheathed portions of the fibers and groove sections that receive and align unsheathed portions of the fibers. First aligning means on the base member longitudinally position the fixed and second fibers in the groove. Covering means mate with the base member for covering at least part of the sheathed portions of the fibers. Aligning means position the covering means precisely with respect to the base member.

Abstract: This invention pertains to systems servicing coin operated telephones and, more specifically, to apparatus in such systems for detecting when called parties fraudulently generate coin deposit tones to simulate the coin deposit tones which should be received from a calling coin station. During intermediate coin deposit intervals, the network connection between the calling and called stations is split. A first coin tone detector is connected to the calling station portion while a second coin tone detector is connected to the called station portion. Logic is responsive to the detection of coin tones by these detectors for indicating whether a detected coin tone is valid or fraudulent.

Abstract: Redundant but independently operable data processors called encoders are arranged so that control of a particular recorder gathering billing data in a telephone switching system can be transferred while maintaining billing continuity for calls being handled by that recorder. More specifically, each encoder checks the validity of billing information received from each recorder. However, each encoder only transmits billing data pertaining to a designated group of recorders to a remote processor. When an encoder detects that it is not receiving valid data from one of its designated recorders, the control of only that designated recorder is transferred to the other encoder if the other encoder indicates that it is receiving valid data from that recorder.

Abstract: Disclosed is a combinational logic arrangement for use in a data processor that selectively performs a plurality of bit manipulations or logic operations including shift, rotate, and insert under mask. The arrangement is controlled by a single instruction format which specifies the parameters needed for each of the operations. The logic arrangement interprets a data word as a bit string with two boundary lines that divide the string into three regions: left region, quantum region and right region. The logic circuit operates upon the left and/or right regions of an output word to either clear all bits, set all bits, propagate the sign bit of an input word or retain the information in the left and right regions of an input data word. The circuit then inserts a quantum of bits obtained from a specified region of another input data word into the output data word starting at any desired location.

Abstract: A diagnostic system is disclosed for detecting malfunctions in the access circuitry utilized to control the reading, writing, and refreshing of a plurality of semiconductor memory modules. More specifically, a pair of access circuits are provided for each module with each access circuit only controlling the accessing of predetermined bits of each word stored in that module. During read, write and refresh operations, the output signals generated by each of the two access circuits for application to the memory elements in that module are "compared" to ensure that the memory elements are being properly accessed. Moreover, even when one memory module is accessed, the output signals of each pair of access circuits in each of the other nonaccessed modules are compared to ensure their continued operability.

Abstract: A diagnostic system is disclosed for detecting malfunctions in the access circuitry utilized to control the reading, writing, and refreshing of a plurality of semiconductor memory modules. More specifically, a pair of access circuits are provided for each module with each access circuit only controlling the accessing of predetermined bits of each word stored in that module. During read or write operations, the output signals generated by each of the two access circuits for application to the memory elements in that module are "compared" to ensure that the memory elements are being properly accessed. During refresh operations, the outputs of each pair of access circuits are also "matched" to ensure the integrity of the refresh operation.