Stanley Q White, 859324 S Saint Lawrence Ave, Chicago, IL 60619

3961378, Jun 8, 1976

Nov 11, 1974

5/522431

Stanley F. White - Elmhurst IL

H04R 3100

29594

A cone for a loudspeaker in which the shear function is more nearly the same at all radii, the shear function being the product of the effective axial thickness at a given radius multiplied by the circumferential length at such radius. The cone is preferably of curved or "exponential" cross section, deeply angled at a central throat but flattening out to approach a plane at the periphery. The cone is made of light, dimensionally stable material characterized by a high velocity of sonic conduction and is preferably in the form of hollow spheres of glass of small dimension in a binder of epoxy or the like. In an alternate embodiment the cone is made of a hard solid acrylic plastic in thin section and with supporting ribs to provide both rigidity and a substantially constant shear function. Encircling the cone is a flexible hinge or "surround". Interposed between the hinge and the edge of the cone is a light collar having axial rigidity to ensure that the edge of the cone remains in a planar locus.

4081613, Mar 28, 1978

May 14, 1976

5/686377

Jose Reines - Glen Ellyn IL
Eric Gordon Platt - Darien IL
Stanley Earl White - Hoffman Estates IL
Robert John Mahood - Arlington Heights IL
Joseph Michael Corrado - Chicago IL

International Telephone and Telegraph Corporation - New York NY

H04M 302

179 18J

An arrangement for providing signalling to the lines of a telecommunications system employing non-metallic switching crosspoints such as a solid state switching network or time division switching network. In a system employing either type of network, line signalling such as ringing, coin control signalling, wire chief testing, and such other signals which are essentially high voltage signals cannot readily be transmitted through the switching network. The present system as disclosed provides an arrangement employing a common, multiplex highway between one or more signal sources and the line circuits. Operation of a switching element such as a relay in a line circuit selected by the common control completes a metallic path from the source bus to the selected line through closed contacts of the relay. In addition, signals of one or more different types may be multiplexed within a signal cycle to produce signals to a number of lines during the period when one line is being signalled. Within this framework, bi-directional signalling such as that required for testing lines can be readily implemented.

3962552, Jun 8, 1976

Dec 12, 1973

5/426612

Jose Reines - Glen Ellyn IL
Eric G. Platt - Darien IL
Stanley Earl White - Hoffman Estates IL
Marion Casimir Byckowski - Prospect Heights IL

International Telephone and Telegraph Corporation - New York NY

H04Q 354

179 18EA

Disclosed is a stored program, computer controlled telecommunications system including as its sole switching network an end-marked, multiple stage matrix network with a line side and a supervisory side. Almost all control functions including line scan and rotary dialed digit storage are included in the computer program, this procedure being possible due to the lack of need for any in-network controls. Certain peripheral circuits have appearances on both the line and supervisory side, these including an auxiliary loop usable as an overflow path providing added possibilities for completion of a path through the matrix network. The auxiliary loop is only called in on calls on which a speaking path has been established and on which the original path through the matrix network has been dropped during a change in the nature of a call. Additionally, other peripheral circuits, such as the Voice Frequency Receiver, Transfer Junctors and Attendant's loop, also have appearances on both sides of the matrix network to eliminate the need for additional auxiliary matrices and the need for added access ports. All circuits provided in high quantity, i. e.