AN IMPROVED BISCUIT BRAKE
Year: 1885

page_text: I, DAVID THOMSON of Gillespie Street Works, Edinburgb, in the County of
Midlothian, North Britain, Engineer do hereby declare the nature of the said
invention for AN IMPROVED BISCUIT BRAKE to be as follows:-
-
This Invention, which relates to an improved biscuit brake, has for its object to
render such brakes reversible without altering the direction of motion of the
driving shaft. This object is effected by applying to the brake a double pinion
reversing gear which, whilst the biscuit brake is in motion being capable of having
the first or second pinion thrown into gear with the spur wheel or pinion of the
brake rollers, causes the rollers to rotate in either direction as required, that is to
say alternately backwards and forwards. A handle and lever are provided, by
pulling which, either of the two pinions of the reversing gear are thrown into gear
with the spur pinion of the rollers according to the direction of motion required to
be imparted thereto.

page_text: I, DAVID THOMSON of Gillespie Street Works, Edinburgh, in the County of
Midlothian, North Britain, Engineer do hereby declare the nature of my invention
for AN IMPROVED BISCUIT BRAKE and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
My Invention, which relates to an improved biscuit brake, has for its object to
render such brakes reversible without altering the direction of motion of the
driving shaft. This object is effected by applying to the brake a double pinion
reversing gear which, whilst the biscuit brake is in motion being capable of having
the first or second pinion thrown into gear with the spur wheel or pinion to the
brake rollers, causes the rollers to rotate in either direction as required, that is to
say, alternately backwards and forwards. A handle and lever are provided, by
pulling which, either of the two pinions of the reversing gear is thrown into gear
with the spur pinion of the rollers according to the direction of motion required to
be imparted thereto.
In order that my said Invention may be properly understood and readily carried
into effect, I will now proceed to describe the drawings hereunto annexed.
Figures 1, and 2, are respectively an end and a side elevation of a biscuit brake
constructed according to my present Invention.
Figure 3, is a plan of the same with the upper roll thereof removed.
In carrying my present Invention into practice I pivot the lever a, to the
gable b, or to a bracket formed in part with such gable b. At points respectively
above and below the point at which the lever a, is pivoted to the gable b, there are
carried the shaft c, and stud d, upon which are respectively carried the spur
pinions e, and f, which are geared into each other as shewn more particularly at
Figure 2. The shaft c, constitutes the driving shaft and at its outer end the said
shaft is squared to admit of the handle, g, being placed thereon. The position of.
the point at which the lever a, is pivoted to the gable b, and the position of the
spur pinions e, and f, carried thereon are in such relation to the position of the
toothed wheel h, secured upon the shaft i, of the lower roll j, that either of
the spur pinions e, and f, may be geared with the said gear wheel h. The lower
end of the lever a, is pivoted to one end of the link k, the opposite end of which
passes through the stationary bracket l, and terminates in the handle m.
under edge of the link , is recessed in two places, one of which is shewn at n, the
other as indicated in dotted lines at Figure 2, being engaged with the lower side of
the bracket 1, and thereby locking the lever a, and link k, in that position in
which the spur pinion e, is retained in gear with the gear wheel h. When it is
desired to rotate the roll j, in a direction the reverse of that arranged for by the
gearing of the pinion e, direct with the gear wheel h, the handle m, of the link k,
is raised, and the said link is drawn forward until the recess n, engages with the
bracket, at which time the spur pinion e, is out of gear with the wheel I, and the
pinion, is geared therewith.
The
The lower roll j, and the upper roll o, are geared together in the ordinary
well-known manner and the parts of the machine which are represented upon the

page_text: annexed drawings but which are not hereinbefore described, being also well-known
and therefore constituting no part of my present Invention, are not herein further
referred to.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is:-
The improvements in biscuit brakes consisting of the pivoted lever a, carrying
the driving shaft c, and stud or short shaft d, and the respective spur pinions e,
and f, either of which is capable of being geared and maintained in gear with the
toothed wheel h, according to the direction in which it is desired to operate the
rolls j, and o, thereof all substantially as and operating in the manner hereinbefore
set forth with reference to the annexed drawings.