A NEW AND IMPROVED FOG OR ALARM APPARATUS FOR SIGNALLING ON RAILWAYS AND OTHER ANALOGOUS PURPOSES
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by Frederick Augustus Guy at the
Office of the Commissioners of Patents on the 5th February 1880.
FREDERICK AUGUSTUS GUY, of 32, Ernest Street, Grange Road, Bermondsey, in
the County of Surrey. "A NEW AND IMPROVED FOG OR ALARM APPARATUS FOR
SIGNALLING ON RAILWAYS AND OTHER ANALOGOUS PURPOSES."
This Invention consists of a new and improved fog or alarm apparatus for
signalling on railways, and which apparatus is also applicable for other analogous
purposes.
The object of the Invention is to make and manufacture in an easy, efficacious,
and inexpensive manner a ready warning or alarm for drivers of trains that the
signal is at danger, thereby giving them timely warning to pull up their train, and
as a means of preventing accidents by collision or otherwise.
The Invention or apparatus consists of a bar of any required or suitable length,
dimension, or form, laid or placed longitudinally parallel, or otherwise, by the side
of the rail, and which bar is either supported by bearers or worked on centres. The
normal position of this bar is that the end facing the engine shall be close to the
top or side of the rail, the trailing end which works on a centre being placed
sufficiently far off to admit of the flange of the wheel passing over or by the side of
it, so that when an engine and train in passing over the rail throws this bar from
the top or side of the rail, the bar will not then resume its normal position again
until the entire train has passed over the length of rail to which the bar is
placed, thereby causing one (or more if required) distinct blow or blows to be struck
on the gong, but if the lever, hereafter described, which works the signal be pulled
over to place the signal at caution, the engine or train will pass without causing an
alarm, the means of striking the gong having been thrown out of gear by that
action of the lever.
To this bar is connected by means of a rod a lever; this lever is for the purpose
of gaining stroke. To this lever is also attached a suitable spring or weight for the
purpose of restoring the bar to its normal position after a train has passed. A. pawl
is connected to the same lever by means of a rod. Now the action of the bar when
moved away from the rail causes this pawl to travel a certain distance, in doing
which it comes in contact with the arm of another lever, taking this lever with it
a certain distance, until by their movement on their respective centres their ends
break contact, at which point of movement the latter lever is suddenly released

page_text: which action allows a spring to take back to their normal position against a fixed
stop the said lever and hammer connected therewith, & at the same time causing
by the swing of the hammer, the striker of which is mounted on a spring end, a
blow to be struck on a gong by means of the recoil of the said hammer which is
fixed on and forms part of the said lever.
The ends of this lever and hammer are connected by a spring in such manner that
the pawl lever can in returning to its normal position pass the lever without
actuating the hammer so as to sound the gong.
I provide a counter balance lever and weight to take back the slack wire when
the signal lever is placed in its normal position, and which is received and works
upon a wheel, and thus put in communication with the signal at the signal
cabin.