Protective Structure Patents (Class 379/437)
  • Patent number: 4903295
    Abstract: The present invention discloses a compact solid state protector unit which comprises an inner insert structure, and an outer cover member having an open base end and adapted to be removably disposed over the insert structure, and a base member adapted to releasably seal the open base end of the cover member. The inner insert structure is constructed and arranged to support the components of a protector circuit mounted thereon in insulated spaced relationship. The disclosed protector circuit comprises two bidirectional solid state voltage sensitive switch devices with an associated ground terminal, two variable resistance devices, and line protector means for protecting the solid state protector unit from high voltage transients and abnormal currents.
    Type: Grant
    Filed: August 7, 1987
    Date of Patent: February 20, 1990
    Assignee: GTE Products Corporation
    Inventors: William Shannon, John Napiorkowski
  • Patent number: 4868876
    Abstract: An electrically conductive network which, at one end, has a low-resistance connection with a user's hand and, at the other end, has a high-resistance connection with ground. This protects electrical equipment such as a telephone keyset from electrostatic discharge and also protects the user from unpleasantly high discharge currents.
    Type: Grant
    Filed: May 20, 1987
    Date of Patent: September 19, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventors: Kurt Schiller, Johann Luger, Hans Schierl, Heinrich Kallhardt
  • Patent number: 4862499
    Abstract: A telephone keypad assembly including a one-piece deformable membrane for sealing the keypad assembly from the environment. The deformable membrane has an upper surface for mating with keypad pushbuttons and a keypad pushbutton housing unit, and a lower surface including a contact actuator for making contact with electrical switch contacts. The membrane forms raised areas or domes which bias the keypad pushbuttons and biasingly resists movement of the contact actuator toward the electrical contacts. The keypad assembly including switch contacts is protected from moisture, dust and other corrosive elements by the seal formed between the housing unit and the deformable membrane.
    Type: Grant
    Filed: September 4, 1987
    Date of Patent: August 29, 1989
    Assignee: Phillips & Brooks, Inc.
    Inventors: David E. Jekot, Harold W. Jordan
  • Patent number: 4853960
    Abstract: A station interface and protector apparatus for use on a telephone line pair includes a protector device having terminals connected from each line to a ground terminal, via a gas discharged tube and/or a protective air gap and includes an insulated cover which covers the protector device and is provided with a telephone receptacle (jack) to which the incoming telephone line pair is connected. A cable having a plurality of wires therein is terminated on one end with a cooperating telephone line plug disposed within the receptacle with the other end of the cable wires being connected to a plurality of terminals provided in the cover which is additionally adapted to receive the subscribers telephone line pairs.
    Type: Grant
    Filed: July 31, 1987
    Date of Patent: August 1, 1989
    Assignee: TII Industries Inc.
    Inventor: Thomas J. Smith
  • Patent number: 4850880
    Abstract: A device having two separate sets of contacts and a pivotal axis allowing 360.degree. of rotational freedom between the two sets of contacts. The device is designed to provide the release of radial mechanical energy, stored in a coiled cord due to repeated twisting action, and imparted to the cord from the device attached to the cord. The device provides for continuous electrical connection between the two sets of contacts, by providing unique rotary contacts which allow interruption-free electrical continuity during the full 360.degree. of rotation. The device provides for a minimal degree of friction, to allow for the rapid and thorough release of radial energy, and also provides minimum contact-wear, to allow for optimum electrical continuity and to provide for a long, useful life.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: July 25, 1989
    Inventors: Charles D. Zayat, Jr., William R. Vincent
  • Patent number: 4850006
    Abstract: A booster and charger unit for a hand-held portable (HHP) telephone capable of preventing a casing of the unit from being heated to an excessive temperature. The casing has thereinside a charging device for charging a battery, which is installed in the telephone, and a temperature sensor responsive to the temperature of the casing. When the temperature of the casing sensed by the sensor rises to a predetermined level, charging by the charging device is interrupted or the charging current thereof is reduced.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: July 18, 1989
    Assignee: NEC Corporation
    Inventors: Yutaka Sasaki, Yoshiharu Tamura
  • Patent number: 4845760
    Abstract: An electro-acoustic transducer is arranged within the handset of a telephone instrument. The transducer is elastically seated and is seated at a distance from the walls of the handset so that noises caused by the handset are not transmitted onto the transducer.
    Type: Grant
    Filed: October 14, 1986
    Date of Patent: July 4, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventors: Erwin Awakowicz, Kurt Schiller
  • Patent number: 4821320
    Abstract: A device for protecting both the operator of an electronic apparatus and the electronic equipment of the apparatus when the operator carries a high electrostatic charge. To ensure a gentle electrostatic discharge of the operator, resistance paths which lead to an ground point of the electronic apparatus are arranged in the danger zone of the apparatus.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: April 11, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventors: Tomas J. Andert, Stefan Pieper
  • Patent number: 4817164
    Abstract: A holder for an electret microphone of the type having a front acoustic aperture and peripheral acoustic apertures is made of insulating material and includes a first sleeve portion of a diameter to receive the microphone snugly and a second sleeve portion of larger diameter. An internal stop limits the extent to which the microphone can be inserted such that the rear portion of the microphone projects into the second sleeve portion. Through holes in the second sleeve portion provide an acoustic passage to the peripheral acoustic apertures. The internal stop is in one embodiment formed by an apertured web. In another embodiment an internal shoulder forms the stop but in that embodiment too an apertured web is provided. A concentric small cylinder extends from the web in that case and terminates short of the shoulder. In either embodiment, a rectangular plate is molded with the sleeves and this forms the cover of a microphone enclosure.
    Type: Grant
    Filed: March 20, 1987
    Date of Patent: March 28, 1989
    Assignees: Northern Telecom Limited, Bell-Northern Research Limited
    Inventors: Friedrich Bertignoll, Mark W. Pocock
  • Patent number: 4800587
    Abstract: A housing for a telephone line protector comprises a well in which are positioned two spring biased members. A first spring biased member is adjacent to the back end of the well and biased away therefrom. The second spring biased member is axially aligned with and biased away from the first spring biased member. One line conductor is connected to the first spring biased member and the other line conductor is connected to a terminal at the back end. The spring bias of the second spring biased member is stronger than the bias of the first spring biased member. Insertion of a protector module first causes movement of the first spring biased member to contact the terminal at the back end, and then moves the second spring biased member relative to the first spring biased member. The protector module contacts a ground connection at the front end of the well as it is inserted.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: January 24, 1989
    Assignee: Northern Telecom Limited
    Inventor: Albert Kupferschmidt
  • Patent number: 4777469
    Abstract: A public terminal receptacle for containing, protecting, and allowing a user access to a computer terminal, telecommunications device for the deaf, or another type of terminal which is telephonically linked and physically adjacent to a public telephone through which the terminal may telecommunicate with other electronic devices. The public terminal receptacle includes a housing having an opening and which is adapted to be attached to a public telephone booth, a drawer which is slidably mounted within the housing to move between a closed position where the drawer is within the housing and an open position where at least a forward portion of the drawer extends out through the opening, the terminal, and a motor drive system mounted within the housing and which is drivingly connected to the drawer for opening and closing the drawer in response to specific electrical signals.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: October 11, 1988
    Assignee: Ultratec, Inc.
    Inventors: Robert M. Engelke, Rodney D. Borst, Kevin Colwell
  • Patent number: 4763352
    Abstract: A lock-down holder for a desk top coin operated telephone includes a base adapted to receive and retain a telephone. The base is adapted to be affixed to a rigid surface and may further include a coin drawer for purposes of increasing the coin storage capacity of a telephone set.
    Type: Grant
    Filed: November 25, 1987
    Date of Patent: August 9, 1988
    Inventor: Walter S. Goff
  • Patent number: 4749359
    Abstract: A telephone network interface device having differing means for access for the public utility, building owner or apartment manager, and those living in individual housing units; differing means of access provided in part by a latchpiece inserted between a first gate leading to a subscriber compartment and a second gate leading to the utility compartment. Also described is a container using the latchpiece.
    Type: Grant
    Filed: August 27, 1987
    Date of Patent: June 7, 1988
    Assignee: Siecor Corporation
    Inventor: Stephen D. White
  • Patent number: 4747134
    Abstract: A telephone hook switch assembly has a housing which defines first and second cavities and a shaft rotatably mounted in the housing. A hook switch lever is mounted on the shaft and is rotatable therewith in the first housing cavity. A switch assembly having snap-action switches is positioned in the second housing cavity. The snap-action switches open and close in a predetermined sequence in response to rotation of the hook switch lever. The assembly provides superior isolation of the electrical contacts from environmental contaminants and is more rugged than conventional leaf spring and program card arrangements.
    Type: Grant
    Filed: June 4, 1987
    Date of Patent: May 24, 1988
    Assignee: Phillips & Brooks, Inc.
    Inventors: Eddie L. Holland, David E. Jekot
  • Patent number: 4700384
    Abstract: A telephone line demarcation unit separates the telephone company's property and wiring from those of the user and provides security for the telephone line connections and connectors. Compartments in the unit provide easy access for the user and further provides a selection of different types of connections or equipment that can be utilized. The telephone company terminals and test boards are separately compartmented so that the compartments can be separately sealed with seals to discourage tampering and provide evidence of tampering, and yet the user's portion of the interface box demarcation unit can be easily accessed for connecting a variety of telephone equipment.
    Type: Grant
    Filed: September 21, 1984
    Date of Patent: October 13, 1987
    Assignee: Communications Systems, Inc.
    Inventor: Daniel Meyer
  • Patent number: 4683585
    Abstract: An arrangement for releasably retaining a telephone apparatus in a standby condition includes a handset including an earpiece and a base having a shelf portion for receiving the earpiece. A hooking post member protrudes through the shelf portion and includes an integral spring to enable the hooking post member to be resiliently movable towards and away from the shelf portion. A switch hook which is separate from the hooking post is arranged to be actuated by the earpiece when the earpiece is brought into engagement with the base. When the earpiece engages the base shelf portion, the hooking post member is resiliently urged into contact with the earpiece for releasably retaining the earpiece on the base. A guide on the base prevents the hooking post member from twisting or rotating.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: July 28, 1987
    Assignee: Motorola, Inc.
    Inventors: James R. Watkins, Jr., Ken T. Huang
  • Patent number: 4677654
    Abstract: A carrying case for a cellular telephone unit which would facilitate the portability of the telephone. The carrying case is relatively compact in nature and the interior of the case is provided with a cover and a plurality of specially designed brackets to conceal and/or anchor the cellular telephone unit consisting primarily of a transceiver, a battery and battery charging circuit, and a handset.
    Type: Grant
    Filed: July 9, 1985
    Date of Patent: June 30, 1987
    Inventors: Steven R. Lagin, Jose L. Pardo
  • Patent number: 4646344
    Abstract: The mobile radio set has a rectangular parallelepiped-shaped case suitable for mounting in the dashboard of an automobile. The handset can be locked at its earpiece and mouthpiece into a cradle mounted on the front panel of the case so that the handset can be positioned in a rest position across the front panel. The keys, mounted on the side of the handset facing away from the cradle, are readable and operable in the rest position of the handset. With a lock mounted in the handset, the mobile radio set can be deenergized and the handset can be blocked in the cradle.
    Type: Grant
    Filed: March 20, 1985
    Date of Patent: February 24, 1987
    Assignee: International Standard Electric Corporation
    Inventors: Bruno Goldhorn, Rolf Stapelfeldt
  • Patent number: D306443
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: March 6, 1990
    Inventor: Lih-Chuan Su