Abstract An operation condition detecting and displaying device for use in conjunction with a rotary indication device including a control circuit for energizing drive means adapted to successively switch and display a plurality of indicating members in series when the drive means receives actuation signals. The operation condition detecting and displaying device comprises at least one abnormal operation condition indication member, a switch cam mounted on the rotary member of said rotary indication device, a first switch in said control circuit to be actuated by said switch cam so as to energize said drive means for successively switching and displaying said indication members, an operation condition detection circuit for generating a check signal when said detection circuit detects an abnormal operation condition and a second switch in said control circuit to be actuated by said cam disc and adapted to energize said drive means when said abnormal condition indication member is positioned in the displaying position while said indication device is operating under normal condition, so as to pass the indicattion member over the displaying position and also energize the drive means when an abnormal condition occurs in said indication device so as to hold said abnormal condition indication member in said displaying position.
In a rotary indication device including a control circuit for energizing drive means adapted to successively switch and display a plurality of indication members in series each time said drive means is fed with a predetermined actuation signal, the improvement which comprises an operation condition detecting and displaying device including at least one abnormal operation condition indication member added to said plurality of indication members in series, a switch cam mounted on the rotary member of said rotary indication device, a first switch provided in said control circuit and interlocked with said switch cam to be actuated thereby so as to energize said drive means to cause the drive means to successively switch and display said indication members in series and abnormal operation condition indication member, an operation condition detection circuit for generating a check signal when said detection circuit detects an abnormal operation condition of said indication device and a second switch provided in said control circuit and interlocked with said cam disc to be a actuated thereby, said second switch being so arranged that when said abnormal operation condition indication member is positioned in the displaying position, the second switch energizes said drive means to cause the drive means to pass the abnormal operation condition indication member over said diSplaying position and bring the succeeding indication member in series to the displaying position and when the second switch is fed with said check input signal regardless of the operation of said first switch, the second switch energizes said drive means to cause the drive means to successively switch said indication means in series until said abnormal operation condition indication member is brought to the displaying position whereby the abnormal operation condition indication member is displayed.
Claim 2
Dependent Claim
287 words
In a rotary indication device including a control circuit for energizing drive means adapted to successively switch and display a plurality of indication members in series each time said drive means is fed with a predetermined actuation signal, the improvement which comprises an operation condition detecting and displaying device including at least one abnormal operation condition indication member added to said plurality of indication members in series, a switch cam mounted on the rotary member of said rotary indication device, a first switch provided in said control circuit and interlocked with said switch cam to be actuated thereby so as to energize said drive means to cause the drive means to successively switch and display said indication members in series and abnormal operation condition indication member, an operation condition detection circuit for generating a check signal when said detection circuit detects an abnormal operation condition of said indication device and a second switch provided in said control circuit and interlocked with said cam disc to be a actuated thereby, said second switch being so arranged that when said abnormal operation condition indication member is positioned in the displaying position, the second switch energizes said drive means to cause the drive means to pass the abnormal operation condition indication member over said diSplaying position and bring the succeeding indication member in series to the displaying position and when the second switch is fed with said check input signal regardless of the operation of said first switch, the second switch energizes said drive means to cause the drive means to successively switch said indication means in series until said abnormal operation condition indication member is brought to the displaying position whereby the abnormal operation condition indication member is displayed.