push buttons

The proper connections for operating one bell from either of two push buttons, A or B, is shown in Fig. 3.

To be sure there are electric push-buttons in the chambers, but as they are useless they can hardly be taken into consideration.

Near the door and fastened against the wall was a wooden framework, bearing a complicated arrangement of push-buttons and levers.

An' my boodwar is goin' to have about seventeen push-buttons in it.

And in front of the seat were various push-buttons and a silver lever, by means of which the flight of the machine was controlled.