Reversible Cog and Pinion Back Stop for Turnstiles and other Revolving Apparatus.
Year: 1887

page_text: Date of Application, 23rd Feb., 1887
Complete Left, 28th Sept., 1887
Complete Accepted, 1st Nov., 1887
PROVISIONAL SPECIFICATION.
Reversible Cog and Pinion Back Stop for Turnstiles and other
Revolving Apparatus.
LUKE ANDERSON 9 Kings Road Peckham London S.E. Engineer do hereby declare
the nature of this invention to be as follows:-
My invention has for its object the doing away with the ordinary rack and pawl
with its noise and in its place using a cog and pinion back stop which is silent in
working and can be used for various purposes in place of the ordinary rack and pawl,
I also add a novel mode of obviating the necessity of making right and left handed
apparatus by providing a means whereby the apparatus can be readily converted into
either a right or left handed one as required, and when fitted to Turnstiles 1 carry out
in the following manner to the upright shaft to which the arms of the stile are fixed
I attach a cog wheel this 1 fix to the upright shaft so that it revolves as part of the
shaft in whichever direction the arms are moved geared into this cog wheel is a pinion
with its centre working in a slotted hole of a fixed plate at each end of this slotted
hole in the fixed plate I arrange a hole through which I can drop a pin the action
being that when the pin is in one of these holes the stile is free to revolve in one
direction only as the cog wheel that is attached to the upright shaft slides the pinion
that is geared into it till its centre works in the end of the slotted hole furthest from
the pin and the cog wheel and pinion are free to revolve but on trying to turn the
arms in the opposite direction to which they are intended to be turned the cog wheel
that is fixed to the upright shaft slides the pinion that is geared into it till its centre
comes against the opposite end of the slotted hole viz. that end next to the pin so that
the teeth of the pinion engage in the pin and the pinion becomes locked so that the
arms of the stile cannot be turned in the wrong direction all that is required to cause
the turnstile to work the reverse hand is to take the pin out of the hole at one end of
the slotted hole and put it into the hole at the other end of the slotted hole when the
action is just the reverse to what it was before.
Dated this 92-1 day of by 1987

page_text: COMPLETE SPECIFICATION.
Reversible Cog and Pinion Back Stop for Turnstiles and other
Revolving Apparatus.
LUKE ANDERSON 9 Kings Road Peckham, London S.E. 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 :-
My invention consists of a novel kind of back stop which can be used in place of
the ratchet-wheel and pawl hitherto used for this purpose and can be applied to any
kind of revolving apparatus.
The accompanying drawings show the back stop as applied to turnstiles in the
following manner on sheet 1 Fig. 1 to the upright shaft A to which the arms of the
turnstile are fixed I attach a cog wheel B this 1 fix to the upright shaft A so that it
revolves as part of the shaft in whichever direction the arms of the turnstile are
moved, geared into this cog wheel B is a pinion C with its centre working in a slotted
hole D of a fixed plate E, at each end of this slotted hole D in the fixed plate E are
holes F. F through which I can drop a pin G the action being that when the pin G is
in the hole the turnstile is free to revolve in one direction only as the cog wheel B
that is attached to the upright shaft A slides the pinion C that is geared into it till
the centre of the pinion works in the end of the slotted hole furthest from the pin G
and the cog wheel and pinion are free to revolve, but on trying to turn the arms of
the turnstile in the opposite direction to that in which they are intended to be turned,
the
cog wheel B that is fixed to the upright shaft slides the pinion that is geared
into it till the centre of the pinion comes against the opposite end of the slotted
holè viz. that end next to the pin G so that the teeth of the pinion Cengage in the
pin G and the pinion becomes locked so that the arms of the turnstile cannot be
turned in the wrong direction, all that is required to cause the turnstile to work the
reverse hand is to take the pin G out of the hole F and put it into the hole F¹¹ at the
other end of the slotted hole D when the action is just the reverse to what it was
before.
Fig. 2 sheet 2 shows the pinion Cattached to an arm D which moves between fixed
stops H. H¹ instead of the pinion C working in a slotted hole D as shown on Fig. 1
sheet 1.
Where the back stop is required to act for one hand only the stop pin G can be a
fixture either at F or F' as required.
This novel kind of back stop being an entirely new motion I do not confine its use
to that of turnstiles only as it can be equally well adapted to all kinds of machinery
where a back stop is required.
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 use of the Pinion for preventing reverse action as a substitute for the Ratchet,
Pawl, Click, or Pallet.