Improvements in or connected with Gear Wheels and Bearings for Magneto-electric Call-bell Apparatus for Telephonic Instruments, Applicable also to other Mechanism.
Year: 1889

page_text: Date of Application, 21st Feb., 1889
Complete Specification Left, 13th Nov., 1889-Accepted, 14th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in or connected with Gear Wheels and Bearings for
Magneto-electric Call-bell Apparatus for Telephonic Instruments,
Applicable also to other Mechanism.
I, HARRY FRASER of 109 Farringdon Road in the City of London, Engineer do
hereby declare the nature of this Invention to be as follows:-
The object of my Invention is to provide means whereby the noise due to the
contact of metal with metal in gear wheels and bearings is obviated or much
reduced.
According to my Invention I make one or both of the surfaces which move in
contact with the other or with each other of raw hide or skin or hide prepared in
an analogous manner. For instance taking the operating mechanism or gear which
is used to rotate the armature of magneto-electric bells in telephonic apparatus I make
the liners of the bearings of the said material or I cover the journals of the shaft
or shafts with the said material and I make the gear wheels or one of them (preferably
the pinion on the axis of the armature) of the said material.
Similarly the corresponding parts of other mechanisms (such as sewing machinery
for example) may be formed of the said material which whilst being very durable
obviates the noise incidental to the contact of metal with metal.
Dated this 21st day of February 1889.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with Gear Wheels and Bearings for
Magneto-electric Call-bell Apparatus for Telephonic Instruments,
Applicable also to other Mechanism.
I, HARRY FRASER of 109 Farringdon Road in the City of London Engineer do
hereby declare the nature of this Invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
The object of my Invention is to provide means whereby the noise due to the
contact of metal with metal in gear wheels and bearings is obviated or much
reduced.
According to my Invention I make one or both of the surfaces which move in
contact with the other or with each other of raw bide or skin or hide prepared
in an analogous manner. For instance, taking as an example the operating mechanism
or gear which is used to rotate the armature of magneto-Electric bells in telephonic
apparatus I make the liners of the bearings of the said material or I cover the
journals of the shaft or shafts with the said material and I make the gear wheels
or one of them (preferably the pinion on the axis of the armature) of the said
material.
Similarly, the corresponding parts of other mechanisins (such as sewing machinery
for example) may be formed of the said material which whilst being very durable
obviates the noise incidental to the contact of metal with metal.
Figure 1 of the accompanying drawing shews a journal covered with raw hide a
or the said hide may be made as a bushing or liner to the bearing in which the
shaft brotates. Figure 2 shews in section and elevation a gear wheel, the part at a
being raw hide with a centre 6', of metal to which the hide is secured by screws or
otherwise. The raw hide may be formed to the requisite shape in any convenient
[Price 6d.1

page_text: way but I prefer to cut it to the general shape and afterwards trim or finally shape
it, and in the case of toothed-gear wheels the blank may be punched and then the
teeth be cut in a tooth-cutting apparatus, such as is used for cutting metal wheels.
I prefer that the raw hide shall be in gear or in contact with metal or other
material than hide, that is to say; that two surfaces of hide shall not be in contact
with each other but this is not essential in the case of toothed gear.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
In or for magneto-electric call-bell apparatus for telephonic instruments or other
mechanism, gear wheels or bearings made in whole or in part of raw hide or
analogous skin or hide, as hereinbefore described.
TL: 11th Jan of November 1880
HARRY FRASER.