Image
Category
Collection
Maker
Object type
Place
Material
Date

Holtz 'restricted ray' vacuum tube

Double chambered vacuum tube with separating wall pierced in two places

1891

One lemon shaped vacuum tube with anode in small extension chamber and three thin circular screens near cathode

One long pear shaped vacuum tube with Maltese cross shaped anode

1879

One vacuum tube containing mill wheel for showing the mechanical effects of "canal" rays

1907

Pye D10 Photicon camera tube

1948-1950

Image Iconoscope television camera tube

1938-1948

Four vacuum tubes containing original helium samples

Two vacuum tubes of krypton made by Ramsay on Dec. 5th 1905

1905

First vacuum tube in which the emanation from radium yielded helium

Five vacuum tubes of helium from various minerals

Six vacuum tubes used in work with radium emanation

Holtz 'restricted ray' vacuum tube

De la Rive's vacuum tube for demonstrating the Faraday rotation of cathode rays in a magnetic field

Experimental vacuum tube

Three vacuum tubes of the "H" form containing helium

1906

Geissler vacuum tubes

1855-1883

Thomson's improved form of Perrin vacuum tube

1925

Reproduction "Fountain of Fire" vacuum tube

1705

Long vacuum tube of helium containing argon

Seven vacuum tubes containing helium from radium emanation

The first vacuum tube filled with argon

RCA 3" Image Orthicon television camera tube (in fitted wooden box)

1948-1960

Gas Discharge Tube, Type CHS 721A, manufactured by Sylvania, USA, c 1960.

Gas Discharge Tube, c 1960

1955-1965

RCA vacuum tube, type 12SF7, in US Army/Navy box.

RCA vacuum tube, type 12SF7, in US Army/Navy box.

Lemon shaped vacuum tubes with twin cathode for focussing, 15, on stand

Lemon shaped vacuum tubes with twin cathode for focussing

1891

Lemon shaped vacuum tube with fluorescent mineral, on stand

Lemon shaped vacuum tube with fluorescent mineral

Cylindrical vacuum tube with pointed electrodes and central circular screen

Vacuum tube with pointed electrodes

Boat-shaped vacuum tube

Boat-shaped vacuum tube

Spindle shaped vacuum tube, one foot long, on stand

Spindle shaped vacuum tube

One small cylindrical vacuum tube with cup shaped cathode, rod anode, and blue fluorescent mineral

One small cylindrical vacuum tube with cup shaped cathode

Spherical vacuum tube with foil electrodes on walls and spring copper contacts, on stand

Spherical vacuum tube with foil electrodes on walls and spring copper contacts

1891

Type 'XP' self-protected line-focus high-vacuum Coolidge x-ray tube, complete with shield and rediatior and vacuum unit, by the General Electric X-Ray Corp., United States, 1936.

Type 'XP' self-protected line-focus high-vacuum Coolidge x-ray tube

1936

Six vacuum tubes (see stroke numbers).

Six vacuum tubes (see stroke numbers).

1898

Vacuum tube with 5 bulbs and enclosed spirals, length 3ft 6ins

Vacuum tube with 5 bulbs and enclosed spirals

Geissler vacuum tube

Geissler vacuum tube

1872

Geissler vacuum tube, 3 bulbs. Length 4ft 6ins.

Geissler vacuum tube, 3 bulbs. Length 4ft 6ins.

1876

Three bulbed vacuum tube with pointed electrodes

Three bulbed vacuum tube with pointed electrodes

Long vacuum tube, on stand

Long vacuum tube, on stand

1891

Spherical vacuum tube with tube extension, with fluorescent screen in each part to show spreading, on stand

Spherical vacuum tube with tube extension

1891

One cylindrical vacuum tube with sliding cathode and two test electrodes, on stand

One cylindrical vacuum tube with sliding cathode and two test electrodes

1891

One pear shaped vacuum tube with ring shaped cathode

Pear shaped vacuum tube

One vacuum tube with grid of carbon rods

One vacuum tube with grid of carbon rods

1879

One lemon shaped vacuum tube with flat circular cathode and rectangular deflecting leaf

One lemon shaped vacuum tube

Two vacuum tubes containing mill wheels for showing circulation of residual gas, one with rectangular mica vanes and one with circular mica vanes, on one stand

Two vacuum tubes containing mill wheels for showing circulation of residual gas

1898

Long cylindrical vacuum tube with ring shaped cathode, on stand

Long cylindrical vacuum tube with ring shaped cathode

1891

One cylindrical vacuum tube with sliding cylindrical sheath, on stand

One cylindrical vacuum tube with sliding cylindrical sheath

1891

Four cylinder vacuum tube. The cylinders contain different fluorescent liquids.

Four cylinder vacuum tube. The cylinders contain different fluorescent liquids

One lemon shaped vacuum tube, with ring shaped wire cathode and hollow tube for magnetic core, on stand with coil

One lemon shaped vacuum tube

Four vacuum tubes containing mill wheels for showing the mechanical effects of "canal" rays, three of these are fitted with magnetically controlled shutters, on one stand

Four vacuum tubes containing mill wheels for showing the mechanical effects of "canal" rays

1907