15381. Receiving radio messages (principles of radio - part two) (10:48)

Date:
1943
Main contributors:
Erpi Classroom Films Inc., Wilbur L. Beauchamp, Ph.D., The University of Chicago Physical Sciences Series
Summary:
Through animated drawings, presents the basic principles of radio reception. Explains the function of the variable condenser and emphasizes mutual inductance, self inductance, and resonance. Reveals through simple demonstrations how a crystal detects radio waves, and how an earphone produces audible sound waves.

15382. Reconditioning a Mower, part 1 (cutter bar) (21:10)

Date:
1943
Summary:
Shows how to check, recondition, and repair the cutter and adjust the knife clips and bar mechanism; how to remove and replace worn sections in the sickle and sharpen the sickle section; how to repair, sharpen, replace, and straighten the guard unit, replace wearing plates, and adjust the cutter bar to the proper lead; and how to adjust the sickle for register.

15383. Removing defective rivets (14:29)

Date:
1943
Summary:
Shows how an inspector marks defective rivets, drills the heads of flush-type and brazier head rivets, and removes the shank and head after drilling.

15385. Right of way (07:35)

Date:
1943
Main contributors:
Eastman, Joseph B. (Joseph Bartlett), 1882-1944
Summary:
Follows a troop train, a freight train, and a truck rushing to deliver men and supplies to a ship convoy in 1943. Explains the reasons for transportation delays and the shortage of goods in wartime. This film was intended to promote understanding and support of the war effort despite inconveniences on the home front.

15386. Road to Berlin (19:04)

Date:
1943
Summary:
Using dramatized events and newsreels, this film shows the organizing done during World War II to ship war supplies to the military. Shows the work of the Army Transportation Corps in providing ship convoys, as well as the work done by supply depots.

15387. Road to Berlin (18:48)

Date:
1943
Main contributors:
United States. Army. Signal Corps.
Summary:
Using dramatized events and newsreels, this film shows the organizing done during World War II to ship war supplies to the military. Shows the work of the Army Transportation Corps in providing ship convoys, as well as the work done by supply depots.

15388. Sharpening a shell end mill (16:46)

Date:
1943
Summary:
How to select the correct arbor; mount the work head; adjust the work head for clearance settings; and set up for sharpening the outside diameter, corner, and face.

15389. Sound recording and reproduction (sound on film) (11:03)

Date:
1943
Main contributors:
Erpi Classroom Films, Inc.
Summary:
Through animated drawings explains the principles of recording and reproducing sound on film. Through demonstrations reveals the functions of the microphone and the light valve and shows how the motion picture projector reproduces sound from a sound track. An instructional sound film.

15390. Suggestion box (09:04)

Date:
1943
Main contributors:
Indiana University, Bloomington. Audio-Visual Center
Summary:
Explains how seemingly minor ideas can improve wartime production. Encourages workers to provide resourceful suggestions that, if tested and approved, can be circulated to factories around the country.