Abstract: A telephone set having a telephone set body and a handset unit which incorporate therein a speaker amplifier and a speaker, respectively, and a coil cord interconnecting the speaker amplifier and speaker, the telephone set being selectively usable in an on-hook and an off-hook state. The telephone set is provided with an implementation which, when a conversation is held in an on-hook state, connects the speaker amplifier and speaker without the intermediary of the coil cord to thereby prevent the level of a voice signal from the speaker amplifier from being lowered. In the on-hook state, the handset unit is placed on a cradle. The implementation against the decrease in the voice signal level comprises flat connecting terminals fitted on the bottoms of recesses which are formed in a casing of the handset unit, and flat resilient connecting terminals fitted on the tips of lugs which extend out from a casing of the cradle to mate with the recesses.

Abstract: A telephone line switch actuating mechanism includes two identical parts, each having a portion which makes up a plunger, while the remaining portion is pivotally mounted for enabling the two parts to be assembled in an opposing relationship to each other into a mechanism such that depression of either plunger activates the other plunger and the telephone line switch.

Abstract: A pay telephone station having a lower housing coin chute (14) which is provided with a coin fraud prevention unit (10) in the form of a thin base (15) arranged in a slot (11) of a coin channel cover plate (12). The base (15) is provided with a pawl (23) having a tooth (24) with a chamfered face ( b 25) which is biased into the path of a coin passing through a coin path (39) by a torsion spring (26). An anchor (59) for connecting a handset (56) to the upper housing coin dial unit (50) of the station includes a base with apertures (63, 64) and a V-shaped body (65) with a notch 66 defined between surfaces (69, 70). A long thumbscrew member (74) with a textured gripping surface connects the anchor (59) to a projector (51) integral with the upper housing (50). The handset cord assembly (A) is first passed through an aperture (54) in the projection (51) and then through the aperture (64) in the base (60).

Abstract: A security device for use with a telephone handset having a microphone and an ear transducer is disclosed. It is adapted to prevent eavesdropping while the handset is in an on-hook position. The security device is comprised of switching assembly disposed in the handset adapted to disable the transducers. The switching assembly is switched to a first state when the handset is placed within a first predetermined orientation corresponding to a secure mode and is switched to a second state when the handset is placed within a second predetermined orientation corresponding to an operative mode.

Abstract: The hangup apparatus uses an inadvertent off-hook detector circuit designed to detect the off-hook "howler" alert signal transmitted to a telephone by the telephone company when the telephone has been off-hook for a period of time without any user activity. The detector circuit provides an automatic hangup signal to an automatically actuated hangup switch, disconnecting the telephone voice network from the telephone lines and restoring service to the telephone. One version of the invention can be incorporated into newly manufactured telephones, and another is suitable for use with existing telephones. Both versions can be realized using readily available commercial electronic components.

Abstract: A pay telephone station having a lower housing coin chute (14) which is provided with a coin fraud prevention unit (10) in the form of a thin base (15) arranged in a slot (11) of a coin channel cover plate (12). The base (15) is provided with a pawl (23) having a tooth (24) with a chamfered face (25) which is biased into the path of a coin passing through a coin path (39) by a torsion spring (26). An anchor (59) for connecting a handset (56) to the upper housing coin dial unit (50) of the station includes a base with apertures (63, 64) and a V-shaped body (65) with a notch 66 defined between surfaces (69, 70). A long thumbscrew member (74) with a textured gripping surface connects the anchor (59) to a projector (51) integral with the upper housing (50). The handset cord assembly (A) is first passed through an aperture ( 54) in the projection (51) and then through the aperture (64) in the base (60).

Abstract: A circuit arrangement is provided for digital telephone stations in a digital private branch exchange, whereby control information are constantly exchanged via a subscriber line. The telephone station is controlled by a constantly interrogating and controlling microprocessor. The microprocessor can, for example, be arrested by a disturbing pulse. The invention provides the creation of a simple possibility of providing a reset pulse in an out-of-order case of the microprocessor. This is achieved in that repeated actuation of the cradle switch contact in brief succession charges the capacitor, due to multiple charging surges, the reaches the threshold voltage at the base of the transistor that is needed for this transistor, whereby the transistor is activated and generates the reset pulse.

Abstract: Telephone instruments generally comprise a mechanical hookswitch connected across the pair of speech wires. This specification discloses solid state hookswitch circuitry comprising a switching transistor controlled by a hookswitch and connected in series with the output of a rectifier, the rectifier being connected directly to the incoming speech wires. Because the hookswitch controls a switching transistor, rather than having to switch line voltages directly, any reliable low current make/break switch may be employed.

Abstract: A hook switch has a box-shaped body an an open end. Within the box-shaped body there is fixed at least one contact piece, and extending from the box-shaped body is an arm on which an actuator is rotatably mounted. A slider is received within the box-shaped body. This slider has a spring biased protrusion with a spherical top which extends through a hole in a cover of the box-shaped body and is engaged by the actuator and displaced against the spring bias. In the process, a movable contact piece mounted on the slider engages a corresponding fixed contact piece mounted within the box-shaped body.

Abstract: An optical hookswitch assembly useable on a telephone set as an optical communications port is disclosed. The hookswitch assembly is comprised of light emitting and detecting diodes so disposed in the telephone so as to detect the presence of a handset. A processor connectable to the telephone circuitry and the light emitting and detecting diodes is provided such that the telephone circuitry is activated by the processor when the light emitting and detecting diodes fail to detect the presence of a handset. The light emitting and detecting diodes are useable as an optical communciations port for accessing the processor by allowing an external computer to communicate with the processor via an optical coupler.

Abstract: The automobile telephone is used in a hands-free condition by coupling its handset with a cradle-shaped coupler which is provided with a pair of swingable support plates for receiving a transmitter portion and a receiver portion of the handset in use to make it possible to receive the handset regardless its size and mounting angle. On a back surface of the swingable support plates are provided a speaker and a microphone which are coupled with the transmitter portion and the receiver portion of the handset respectively so as to make it possible to use the telephone in a hands-free condition through these speaker and microphone incorporated in the cradle-shaped coupler.

Abstract: A security device for use with a telephone handset having a microphone and an ear transducer is disclosed. It is adapted to prevent eavesdropping while the handset is in an on-hook position. The security device is comprised of switching means disposed in the handset adapted to disable the transducers. The switching means is switched to a first state when the handset is placed within a first predetermined orientation corresponding to a secure mode and is switched to a second state when the handset is placed within a second predetermined orientation corresponding to an operative mode.

Abstract: A telephone instrument has a rectangular recess (3) along one side of the body which receives the handset. The handset has a recess which fits over a locating member (2) when on-hook. The hook switch contacts (6) are controlled by a pivoted member (4), which acts on the end of a plunger (7) to control the hook-switch contacts. The plunger (7) is spring-urged to its off-hook condition, i.e. when the handset is not in the recess.

Abstract: A telephone stand has a housing with a cradle in its top for a handset adapted when placed in the cradle to depress a pair of laterally spaced plungers passing through holes in the housing down into its interior. A line switch is disposed in the housing below and laterally between the plungers. The plungers are coupled to the switch by a Y-shaped piston comprising a crosshead spanning the lateral spacing between the plungers, a pair of tines projecting upwards from laterally opposite ends of the crosshead and having vertical bores therein in which lower portions of the plungers are received, and a laterally central stem extending down from the crosshead and having camming surfaces thereon adapted upon downward displacement of the piston (by downward driving of either of both of the plungers) to wedgingly displace resilient blades in the switch to change switch conditions thereof.

Abstract: An actuating member for a cradle switch comprises free ends with oblong holes for receiving male members mounted within the housing of a telephone set to define a pivot axis. A web having a recess therein is mounted within the telephone station and a detent carried by the actuating device projects into the recess.

Abstract: A telephone set which has a hands-free mode of operation is disclosed. The telephone set includes a telephone circuit connector to a handset and a hands-free circuit connected to a loudspeaker. A hook switch is mechanically operated in accordance with operation of the handset. A semiconductor switch is connected in parallel with the hook switch and is controlled by a control circuit. The telephone circuit or hands-free circuit is selectively connected to a pair of telephone lines through the hook switch or the semiconductor switch.

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.

Abstract: A telephone receiving apparatus (100) rigidly retains a telephone handset (200) without the need for a release lever. In the preferred embodiment, a moveable boss (108) and a rigid boss (106) engage corresponding notches (208 and 206) in the earpiece of the handset during insertion. The handset (200) is removed by moving it forward until the rigid boss (106) is cleared. The improved telephone receiving apparatus of the present invention may be advantageously utilized in mobile telephones and a variety of other applications where a telephone handset is subject to shock and vibration during normal use.

Abstract: A telephone unit is adapted for mounting in either a vertical or a horizontal mode. In the vertical mode, the telephone cradle includes an upwardly extending hook member which projects into the space occupied by the handset to engage a downwardly facing recess in the handset to support the handset in a fixed position. In the horizontal mode, the hook member is retracted from the space occupied by the hook member, and a movable wall is positioned to bias the handset into the same fixed position relative to the cradle.

Abstract: A telephone hook switch uses an elastomeric member as the contact making member. A hook switch has a pivotally mounted actuating member having two levers extending in opposite directions, one on each side of the pivot axis. One lever is moved by the positioning, and removal, of a handset, the actuating member being biased to a particular pivotal direction. The other lever presses on a deformable projection in the elastomeric member. Depression of the projection causes an electrically conducting layer to move into contact with contact areas of a switch position on a printed circuit board.

Abstract: A switch operating mechanism for use in a telephone instrument (for example, for operating a hook switch) has two arms (4 and 5) for projection from--and independent displacement with respect to--an outer surface of the instrument body (1). The arms (4 and 5) are arranged to co-operate with a switch actuating member (13) such that this member adopts a first position when both arms (4 and 5) are retracted with respect to the body (1), and a second position when one or both of the arms (4 and 5) is or are extended from the body (1). This mechanism is particularly advantageous for operating the hook switch in a one-piece telephone instrument because inadvertent depression of one of the arms (4 or 5) does not cause actuation of the hook switch.

Abstract: A telephone hook switch arrangement includes a base assembly (1) and a T-shaped hook switch lever 3, which is substantially T-shaped. One end of the cross-piece of the T is pivoted to a downwardly-extending portion (2) of the base assembly. At the upper end of the leg of the T, pins (e.g. 8) are on each side, each fits under the end of a moveable contact (e.g. 5). The lever also has a spring strip 10 integral with it and normally under tension. The drawing shows the arrangement when off-hook, in which case the spring strip (10) urges the arrangement to the condition shown. When on-hook, the handset, via another linkage (not shown) urges the lever (3) to the state shown in dashed lines, when the contacts are open.

Abstract: A stand for a telephone set comprises an open-bottomed housing providing at its top a handset cradle to the rear of a housing upper wall slanting up towards the cradle and having a large aperture in it. A keypad has keys projecting outward within the aperture and, also, an upwardly slanting cover framed by the aperture. The keypad is secured to the housing by screws passing through support tabs at the side margins of the aperture and into the casing. A faceplate covers the heads of those screws. A printed wiring board with printed wire conductors and bulk telephone set components on, respectively, its upper and lower sides is secured beneath and to the keypad to be spaced from, and have the same upward slant as, the keypad. Mounted on the rear of the board is a line switch with a spring biased pivotable actuating lever.