Category: Radiology
Estimated Date: 1925
Name: Interval timer
Manufacturer: Victor x-ray

Description: 3.5” circular clock on a 1.5” x 2” trapezoidal base, anodized surface with a face calibrated 0.25 minutes up to 10 and an inner scale calibrated in 10 min intervals to 120 minutes. On top is a 1.5” by 2” diameter bell, which is wound with clock by a loop on top. This device was used for timing development of X-Ray film and related activities.

Reference 1: 61

X-Ray tube
X-ray tube (Pifford)
Interval timer
Glass X-Ray Plate