Year: 1899

page_text: T, HENRY HARRIS LAKE, of the Firm of Taseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, do hereby declare the
nature of this invention to be as follows: --
This invention relates particularly to bevel gear wheels.
According to my invention one of the gear wheels is provided with substan-
tially convex or crowning roller teeth adapted to gear with a second wheel
having longitudinally grooved fixed teeth."
gear
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, 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:-
This invention has for its object the production of improvements in gear wheels
having roller-teeth which are particularly practical and efficient, and consists,
essentially, in the combination, construction and arrangement of the teeth of the
gear wheels and the means for supporting and adjusting the roller-teeth. In
describing this invention, reference is had to the accompanying drawing, in which
like letters indicate corresponding parts in all the views.
Figure 1 is a sectional view of a pair of operatively engaged gears embodying
my invention.
igures 2 and 3, are face views of said gears.
Figure 4 is an enlarged sectional view of contiguous portions of the gears
shown in their position assumed in Figure 1.
12 are a pair of my improved gears which preferably consist of bodies 3 4
and teeth 5 6. The body 3 is formed integral with the teeth 5 and the body 4

page_text: is provided with lugs 7 arranged at opposite ends of the teeth 6 and formed with
rounding extremities usually of slightly less diameter than said teeth. These
lugs are provided with cylindrical openings, the openings in the inner lugs being
of smaller diameter than the openings in the outer lugs and having enlarged inuer
ends.
The teeth 5 are formed with lengthwise grooves 8 in the upper portions of their
opposite faces, which grooves decrease in depth in opposite directions toward the
inner and outer edges of said teeth and merge at their lower ends into the planes
of the lower portions of said faces. The teeth 6 are mounted on pivots V and
preferably consist of rollers formed with substantially frusto-conical openings
and decreasing in diameter in opposite directions, being thereby formed with
substantially convex or crowning peripheral surfaces for entering the grooves
of the teeth 5. Gear teeth of the described construction reduce to a minimum
the friction and strain incidental to their operative engagement and are highly
practical and efficient.
The pivots 9 are formed with substantially frusto-conical intermediate portions
arranged in the openings of the roller-teeth 6, and are usually provided with
enlarged outer ends and threaded inner ends. Said outer ends are formed with
shoulders for engaging a screwdriver or other tool and said inner ends are pro-
vided with longitudinally movable nuts 10 projecting into the enlarged ends of
the openings in the adjacent lugs 7. The pivots 9 are thus readily adjusted longi-
tudinally in order to take up or compensate for the wear on the roller-teeth 6
and prevent undue looseness of said roller-teeth.
The construction and operation of these improvements in gear wheels will now
be readily understood upon reference to the foregoing description and the accom-
panying drawings.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, as communicated
to me by my foreign correspondent, I declare that what I claim is:
-
1-A pair of gear wheels, one having rigid teeth with grooved faces, and
the other having roller-teeth for engaging the rigid teeth, said roller-teeth pro-
jecting into the grooves of the rigid teeth, substantially as and for the purpose
described.
2 A pair of gear wheels, oue having rigid teeth provided with lengthwise
grooves decreasing in depth in opposite directions, and the other having roller-
teeth for engaging the rigid teeth, said roller-teeth projecting into the grooves
of the rigid teeth and decreasing in diameter in opposite directions, substantially
as and for the purpose specified.
3-A pair of gears, one having rigid teeth provided with lengthwise grooves in
the upper portions of opposite faces thereof decreasing in depth in opposite
directions and merging at their lower ends into the planes of the lower portions
of said faces, and the other having roller-teeth for engaging the rigid teeth, said
roller-teeth projecting into the grooves of the rigid teeth and decreasing in
diameter in opposite directions, substantially as and for the purpose set forth.
Dated thig let dar of November 1890
HASELTINE, LAKE & Co.,
45, Southampton Buildings, Londoh, W.C.,
Agents for the Applicant.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, Londoh, W.C.,
Agents for the Applicant.