The Phonogram (1901-05)

Page scan 0002 from The Phonogram

Record Details:

Title:
The Phonogram
Date:
1901-05
Volume:
The Phonogram (II), Issue 13
Leaf #:
0002
Language:
English
Subjects:
honograph,"Phonograph History, Thomas Edison","National Phonograph Company","Sound Recording History
Collection:
Recorded Sound
Coordinator:
Media History Digital Library
Date Added:
July 20, 2022
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MAY 1901 naturals at its own pleasure carefully follow the suggestions offered below. See that the mandrel is not too tight between its centers. Remove the belt and see if it runs free and without binding. Examine the belt: it must not be too loose; as, if so, it will slip; still it must not be drawn too tight. In the spring motor types of Phonographs (except the “Triumph**) the machine is provided with an idler pulley. This idler pulley is held against the belt by means of a spring arm and this spring causes the idler to press just hard enough against the belt to take up all the slack in it. See that this idler pulley runs free in its bearing. If it does not, clean off the old oil which may have gummed and apply new. The Triumph Phonograph has no idler pulley but in its placejias a belt tightening screw under the top plate of the machine. This is in the form of a knurled nut which works on a screw stud. By un-screwing the nut, the frame of the motor is allowed to drop lower down and the distance between the driving pulley and the pulley on mandrel is increased; this tightens the belt. If the nut is turned in the opposite direction the distance between pulleys in lessened and the belt loosened. See that the governor brakes (or small arms containing felt fingers which press against the flange of governor) are well oiled and that the governor itself turns freely. Ex- amine and lubricate all bearings in the motor. See that the feed nut (small nut which works on thread of mandrel shaft) has the proper tension ; just enough to enable it to engage the thread on mandrel shaft and move the speaker arm from end to end. This tension may be