Abstract: When an operator applies a removing force to turn a switch portion b in a direction C2, a projection a4 abuts against a slope b71 so that the removing force as a reaction is applied to the slope. The removing force is divided into a component working along the slope b71 and a component F working in a same direction as a center axis X. Thus, the removing force is converted into a force F in the same direction as the center axis X. By means of the force F in the same direction as the center axis X, a pushbutton support b6 is moved downward as accordingly moving a movable contacts b9 away from a fixed contacts b12 via a contact axis b5.

Abstract: A push-button switch 5 disposed in a switch case 3 has c-contacts and a normally close contact electrically connected with a terminal block 9 via conductors 39. Leading ends 23 of cores of a cable 7 introduced into the switch case 3 are inserted in insertion holes 49a, 49b formed in the terminal block 9. Screws 53a, 53b mounted to the terminal block 9 are tightened to press the leading ends 23 of the cores against conductive connection portions, on one side, in the insertion holes 49a, 49b, thereby to establish electrical connection.

Abstract: There are provided, together with two microswitches 20 accommodated in a cylindrical compartment 13, a manipulation member 2 which can freely swing about a pivot portion 2a in the directions of arrows A and B, a transmission member 3 which can freely move in reciprocating motion within a specific range between a transmitting position and a non-transmitting position located along a radial direction of an arc which is the trajectory of the swing motion of the manipulation member 2 in the directions of the arrows A and B, a contact member 4 which can freely move in reciprocating motion within a specific range between an exposed position and a retracted position in the directions of arrows E and F, a driven member 5 which can freely move in reciprocating motion in the directions of arrows G and H, and a restricting part 6 fixed at a position opposing the contact member 4.

Abstract: There are provided, together with two microswitches 20 accommodated in a cylindrical compartment 13, a manipulation member 2 which can freely swing about a pivot portion 2a in the directions of arrows A and B, a transmission member 3 which can freely move in reciprocating motion within a specific range between a transmitting position and a non-transmitting position located along a radial direction of an arc which is the trajectory of the swing motion of the manipulation member 2 in the directions of the arrows A and B, a contact member 4 which can freely move in reciprocating motion within a specific range between an exposed position and a retracted position in the directions of arrows E and F, a driven member 5 which can freely move in reciprocating motion in the directions of arrows G and H, and a restricting part 6 fixed at a position opposing the contact member 4.

Abstract: A push-button switch 5 disposed in a switch case 3 has c-contacts and a normally close contact electrically connected with a terminal block 9 via conductors 39. Leading ends 23 of cores of a cable 7 introduced into the switch case 3 are inserted in insertion holes 49a, 49b formed in the terminal block 9. Screws 53a, 53b mounted to the terminal block 9 are tightened to press the leading ends 23 of the cores against conductive connection portions, on one side, in the insertion holes 49a, 49b, thereby to establish electrical connection.

Abstract: An actuator of the present invention comprises an operation key 2 to be inserted into a key insertion hole formed in the safety switch, and a base 3. The operation key 2 is held on the base 3 and capable of freely swinging in two orthogonal directions. The actuator also comprises means (e.g. a guide stopper 4 and engagement spaces 34) for selectively restricting the swinging movement of the operation key 2 to either of the two directions.

Abstract: In a case where a left-hand push-button switch is ON, a second relay RL2 is electrically de-energized to open a normally close contact RL2-1 of the second relay RL2 so that a relay contact circuit RC is opened. If, in this state, a right-hand push-button switch is shifted to a second OFF state, a normally close contact R3-1 of the right-hand push-button switch is opened. Thus, a third relay RL3 is not electrically de-energized and a first and a second circuits are in cutoff until both the right-hand and the left-hand push-button switches are returned to a first OFF state.

Abstract: A push-button switch and a teaching pendant employing the same are provided. The push-button switch ensures that a push button is capable of switching ON/OFF the switch if one of contacts thereof should fail during an operation of the switch. For achieving this object, a switch case 3 contains two c-contacts 9a, 9b each having a snap action configuration and switching mechanisms 11a, 11b for opening/closing the c-contacts 9a, 9b. When a push button 5 is depressed, the switching mechanisms 11a, 11b simultaneously open/close the c-contacts 9a, 9b for turning ON/OFF a push-button switch 1.

Abstract: A push-button switch and a teaching pendant employing the same are provided. The push-button switch ensures that a push button is capable of switching ON/OFF the switch if one of contacts thereof should fail during an operation of the switch. For achieving this object, a switch case 3 contains two c-contacts 9a, 9b each having a snap action configuration and switching mechanisms 11a, 11b for opening/closing the c-contacts 9a, 9b. When a push button 5 is depressed, the switching mechanisms 11a, 11b simultaneously open/close the c-contacts 9a, 9b for turning ON/OFF a push-button switch 1.

Abstract: An actuator of the present invention comprises an operation key 2 to be inserted into a key insertion hole formed in the safety switch, and a base 3. The operation key 2 is held on the base 3 and capable of freely swinging in two orthogonal directions. The actuator also comprises means (e.g. a guide stopper 4 and engagement spaces 34) for selectively restricting the swinging movement of the operation key 2 to either of the two directions.

Abstract: A main lock mechanism and an auxiliary lock mechanism are juxtaposed with a switch body. The main lock mechanism including a switchable portion switchable between Lock position and Unlock position, an operation piece removably mounted to the switchable portion for switching the switchable portion, and a lock body which, when an actuator is inserted, disables or enables the rotation of a drive cam depending upon whether the switchable portion is at Lock position or Unlock position. The auxiliary lock mechanism including a drive portion actuated at transfer of the switchable portion to Lock position, an auxiliary contact alternating between a closed position and an open position depending upon whether the drive portion is non-operative or operative, and an operative portion which maintains the switchable portion at Lock position when the drive portion is non-operative and permits transfer of the switchable portion to Unlock position when the drive portion is operative.

Abstract: A push-button switch provided with a hollow push button, a case supporting it, and a switching mechanism having a first contact disposed within the case and a second contact disposed opposite to the first contact, with one of its ends being inserted into a hole of the push button. Within a hole formed in an inserted section of the switching mechanism, a slide block is provided slidably in a direction crossing the direction in which the push button is pushed. A slope capable of engaging with a slope of the hole of the push button is formed on the slide block. A coil spring (return spring) for energizing a shaft of the switching mechanism so as to abut the push button is provided on the bottom of the case. This configuration enables the push button to take up a first OFF state, an ON state and a second OFF state in order of depression.

Abstract: A signal output is taken out from the input stage or respective output stages of the signal characteristic processing means through a signal line selected by selecting means. In accordance with the taken signal, the level control signal generating means sets the output level of the audio output signal. Then, the output level setting means sets the output level of the audio output signal in accordance with the level control signal outputted by the level control signal generating means. Therefore, the switching noise due to switch signal lines by selecting means is prevented from entering into an audio output signal during the processing of the output level of the audio input signal.

Abstract: A safety switch that is constructed to change over the connection contact when an actuator enters the operating portion of the switch proper and an operating rod at the switch portion moves in response to this. The safety switch includes a driving cam and restricting plates arranged on either side of the driving cam for restricting movement of the driving cam when an object other than the actuator is inserted into the operating portion.

Abstract: A safety switch that is constructed to change over the connection contact when an actuator enters the operating portion of the switch proper and an operating rod at the switch portion moves in response to this. The safety switch includes a driving cam and restricting plates arranged on either side of the driving cam for restricting movement of the driving cam when an object other than the actuator is inserted into the operating portion.

Abstract: A safety switch in which one piece of cam plate 1 (51) which rotates and moves the operating rod 6 (7) of the contact of the switch portion as the actuator 102 enters the operating portion 111 (511), and the lock plates 2, 3 (lock pieces 52, 53) are arranged on the side of the cam plate 1 (51) to form a lock mechanism for restricting the rotation of the cam plate 1 (51) so that the lock mechanism of the cam plate 1 (51) by lock plates 2, 3 (lock pieces 52, 53) is released and the cam plate 1 (51) is rotated only when the actuator 102 enters, thereby preventing the operating portion from being operated by any tool other than the special-purpose actuator. In one of the specific embodiments, the cam plate 1 is formed with recesses 1a, 1b and lock grooves 1c, 1d, and the lock plates 2, 3 are respectively formed with inclined surfaces 2a, 3a and engaging pawls 2c, 3c for fitting into the lock grooves 1c, 1d.

Abstract: A digital signal processing apparatus for matching the sampling frequency of an input digital signal to an internal sampling frequency. The digital signal processing apparatus has a sampling frequency converting unit for matching the sampling frequency of an input digital signal to an internal sampling frequency, a sampling frequency detection unit for detecting the sampling frequency of the input digital signa, a frequency difference calculating unit for finding the frequency difference between the inherent sampling frequency of the input digital signal and the sampling frequency detected by the sampling frequency detection unit and a pitch shifting unit for shifting the pitch of an output digital signal of the sampling frequency converting unit based upon said frequency difference. If the input digital signal has the sampling frequency slightly offset from the inherent sampling frequency, the signal of the inherent sampling frequency can be recovered, while the pitch can be restored to the inherent pitch.

Abstract: In addition to an output Y(n) of an adding device, a dither output of a dither generating circuit is supplied to an adding device. The output Y(n) of the adding device is added to a bit that is one bit lower than the LSB of the shortest word length of the hardware (namely, the place of LSB/2). The output of the adding device is supplied to a delay device. In other words, when the shorter word length is 32 bits corresponding to the word length of the RAM of the delay device, the dither is added to the bit 33. In the data Y(n) to which the dither has been added, the low order bits thereof are truncated corresponding to the word length of the delay device. The resultant data is supplied as next timing output data Y'(n-1) to the delay device and stored therein.

Abstract: The safety switch unit controls the source of power for machinery in accordance with the opening and closing of a room door. The safety switch includes an actuator (2) secured to a door, a cam shaft extending transversely of a direction in which the actuator (2) advances into the switch unit (1), the actuator (2) having a stepped top end in correspondence to which cam plates (13), (14a) and (14b) are provided within the switch unit (1) each capable of independently rotating, these cam plates having start sides (17) and (22) and a single cam follower pin (29) passed therethrough, thus protecting the switch unit (1) against mischievous or malicious operation.

Abstract: A method of self-diagnosis in a digital signal processing system. The digital signal processing system comprises a digital signal processing apparatus which includes a plurality of electronic components for processing signals in a plurality of channels. An output of the digital signal processing apparatus is coupled to an input of the digital signal processing apparatus. A central processing unit causes one after another of the electronic components to generate a predetermined signal while the other electronic parts are in a condition for passing the predetermined signal therethrough. The CPU then checks whether or not the output of the digital signal processing apparatus is correct. When the output of the digital signal processing apparatus is not correct, the central processing unit outputs a unique reference number for the electronic component from which the predetermined signal was then generated. The reference number for the electronic component is visually indicated on a bar graph meter.