Abstract: A pay telephone housing comprises a large capacity vault having a floor, first and second side walls, and a back wall. The vault includes a front opening and a peripheral rim extending at least partly around the front opening and having a rear edge. A removable vault door is provided for covering and uncovering the front opening and includes first and second locking plates which are operable to be extended to a locking position at least partly behind the rear edge of the peripheral rim to prevent the removable vault door from being removed from the vault. A key operated lock assembly is operable for selectively locking the first and second locking plates in the locking position.

Abstract: A coin receptacle cover for attachment to a coin receptacle box and subsequent use in a pay telephone comprising a panel, connectable to a coin receptacle box, which defines an opening therethrough for admitting coins into the coin receptacle box. The cover also comprises a movable door mounted for linear reciprocating movement between a closed position covering the opening and an open position uncovering the opening. An actuator arm is mounted for pivotal movement and includes a finger which is engageable by a pay telephone for pivoting the actuating arm upon installation of the coin receptacle cover in a pay telephone. Additionally, a pin and slot arrangement between the movable door and the actuator arm is provided for converting pivotal movement of the actuator arm into linear reciprocating movement of the movable door. The coin receptacle cover further comprises a linear track and the movable door has a guide pin slidable within the linear track.

Abstract: A coin receptacle for use with a locking coin receptacle cover and for use within a pay telephone. The coin receptacle comprises a molded one-piece plastic (polycarbonate) receptacle body having a bottom and four sides extending therefrom. The four sides define a top opening adapted to be covered by a coin receptacle cover. The receptacle body includes slots and a tang for releasably retaining the receptacle cover. The receptacle body further comprises a pull for facilitating removal of the coin receptacle from a pay telephone.

Abstract: A coin return apparatus, for use with a pay telephone, which provides a discontinuous coin return path between the coin return structure and the coin discharge opening of the pay telephone and which resists "stuffing", "stringing", and "pinning". The coin return apparatus includes a housing which is mountable within the pay telephone and a movable door mounted to the housing. The housing includes a chamber therein and a first opening which is communicable with a passageway of a coin return structure of the pay telephone and which is selectively communicable with the chamber. The housing further includes a second opening which is communicable with the environment about the pay telephone and which is selectively communicable with the chamber. The movable door is movable between first and second positions relative to the housing.

Abstract: A coin box monitoring circuit for use in pay telephones, providing coin detection, coin volume totalization, and full coin box signaling to the telephone central office. An included coin chute assembly has three channels that cause nickels, dimes, and quarters to pass through specific locations within each channel. Light sources and light detectors detect the passage of coins. A microprocessor is utilized to control the light sources, monitor the detectors, and volumetrically count the coins passing through the coin chute. On reaching a full condition, a microprocessor then controls a relay to signal that the predetermined coin box level has been reached.

Abstract: A coin chute trigger assembly having separate coin paths for nickels, dimes, and quarters. Intentionally, the dime coin path is made at least twice as wide as the thickness of a dime in order to prevent hangups and jams. A trigger included in each coin path is operated in response to deposit of the appropriate coin through the coin chute or path and causes operation of an included pair of switching contacts.

Abstract: A coin chute trigger assembly having separate coin paths for nickels, dimes, and quarters. A microswitch is positioned adjacent to each coin path. A trigger included in each coin path is operated in response to deposit of the appropriate coin through the coin chute to cause operation of the included or adjacent microswitch.

Abstract: Shock prevention elements for use in a telephone paystation handset consisting of a pair of polyester dielectric elements positioned over associated transmitter and receiver units so as to block high voltage potentials resulting from application of collect and refund signals applied to the paystation from an associated telephone central office.

Abstract: A special cover for the anti-stuffing device door of a paystation telephone coin chute. The cover prevents insertion of large firecrackers or similar devices inside of the anti-stuffing device.

Abstract: Armor for a telephone paystation lower housing. Four elements welded in place. Three of the four elements are reversible and permit usage on different configurations of paystations.

Abstract: A high security shield for use on the upper housing of conventional telephone paystations consisting of a thick stainless steel or similar material U-shaped wrap-around welded to the standard upper housing. The unit replaces the standard die cast face plate and contains the usual face plate features to provide maximum high security. The shield covers the entire front of the upper housing as well as each of the sides.

Abstract: A bracket for mounting within a telephone paystation to retain a telephone handset armored cable of the type including a central cable terminated at at least a first end in a stop secured to said cable, and with an armored sheath encircling said cable.

Abstract: A circuit operated in response to deposit of a coin through a trigger switch to selectively operate one of a plurality of signal generators. When coins are deposited through said coin trigger switch, blocking light from a light source to a light detection means, an associated signal driver activates a selected tone signal generator.

Abstract: An improved coin escrow mechanism for use in a coin telephone including movable plates located at the corners where the hopper chute joins with the collect and refund channels, respectively. The movable plates facilitate the deposit of additional coinage. Also included is a special notch in the hopper facilitating the easy assembly of the coin escrow mechanism, particularly as to a trigger switch actuator used for actuating the trigger switch on the relay portion of the mechanism.

Abstract: A plastic vault liner for use in paystations for the purpose of providing a spacer underneath the coin receptable. Two versions are shown: a standard one piece plastic version and a high security version which provides a stainless steel anti-drill plate as an integral part of the liner. The liner is designed as a bevel spring to insure positive upward pressure on various coin enclosures.