| 释义 |
Töpler Physics.|tɜːplə(r)|
Also Toepler.
[The name of A. J. I. Töpler (1836–1912), German physicist, who invented the pump in 1862.]
Töpler (or † Töpler's) pump: a pump in which the reservoir to be evacuated is connected by a glass tube containing a valve to a second reservoir, which in turn is connected by a flexible U-tube to a reservoir of mercury, so that lowering the last draws gas out of the first reservoir into the second and raising it expels gas from the second reservoir into the atmosphere. Also absol.
1883Encycl. Brit. XVI. 31/1 In Töpler's pump this is attained by using..for the inlet and the outlet vertical capillary glass tubes. 1922Glazebrook Dict. Appl. Physics I. 8/1 The working of a Töpler by hand is extremely tedious, for several hours may be required to reach the limit of pressure. 1932[see Sprengel]. 1976A. Roth Vacuum Technol. v. 201 With the Toepler pump, pressures down to 10-5 Torr can be obtained, except the mercury vapour pressure which is about 10-3 Torr. |