Mr. Garwell touched a push-button on his desk, and a clerk appeared.
Give the location of the electric bell, the electric generator and the push-button.
"Just you wait until I call the porter," said Roger, and touched the push-button.
"I see you have," Cappy cut in blandly, and pressed the push-button on his desk.
He sighed resignedly and pressed the push-button on his desk.
On the front door of the jail was a push-button that connected by a wire with a gong within the building.
A second dim light was burning here, just enabling him to see the push-button.
These may be referred to as the plug type and the push-button type, respectively.
Fig. 54 shows a combination of push-button, speaking-tube, and letter-box used in city apartment houses.
As many taps of the bell can be given as desired by pressing the push-button.