Improvements in Safety Gear for Engines.
Year: 1889

page_text: Date of Application, 22nd Mar., 1889
Complete Specification Left, 12th Apr., 1889-Accepted, 15th June, 188"
PROVISIONAL SPECIFICATION
Improvements in Safety Gear for Engines.
GEORGE HOLCROFT of High Bank Tyddyngwladis Ganllwyd, near Dolgelley,
North Wales, Consulting Engineer and JAMES GRUNDY of 36 Winton Street,
Ashton under Lyne, near Manchester, Engineer, do hereby severally declare the
nature of this invention to be as follows:-
Our improvement consists in the application of an automatic stop motion to the
Governor connections by means of one or two projection moving along with
the Governor rod or one projection and the end of the Governor rod acting as the
other projection coming against two inclined planes according as the Engine is
running over speed from two separate causes disconnecting the Governor Rod from
the stud on the lever admitting steam to the Engine thereby causing the Engine to
stop. One projection to come into action when the Governor drops below the position
due to the speed at which the Engine is required to run, or from accident to the
Driving gear of the Governor, causing the Engine to stop running by disconnecting
the Governor rod from the stud on the lever of the triplet shaft or lever of throttle
valve or other valve admitting steam to the Engine. The other projection acting on
the other inclined plane comes into action when the Engine is running too fast either
from accident to the driving gear or from any other cause giving accelerated speed
to the Engine, the action to shut off the steam is the same as described before.
Dated this Twenty first day of March 1889.
GEO. HOLCROFT.
JAMES GRUNDY.
COMPLETE SPECIFICATION.
Improvements in Safety Gear for Engines.
GEORGE HOLCROFT of High Bank, Tyddyngwladis, Ganllwyd, near Dolgelley,
North Wales, in the County of Merioneth, Consulting Engineer, and JAMES GRUNDY
of 36 Winton Street, Ashton-under-Lyne, in the County of Lancaster, 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:-
or two
Our improvement consists in the application of an Automatic stop motion to the
Governor connections (marked A on the drawing) by means of one
projections carried along with the Governor rod A or one projection B and the end
of the Governor rod B₁ acting alternately against the two incline planes CC¹
according as the Engine is running over speed from two separate causes disconnecting
the Governor rod from the stud D on the lever E admitting steam to the Engine, by
means of the balance weight F the steam is shut off thereby causing the Engine to
stop. One projection or end of Governor rod B¹ comes into action when the
Governor drops below the position due to the speed at which the Engine is required
to run, or from accident to the driving gear of the Governor, causing the Engine to
stop running by disconnecting the Governor rod from the stud D on the lever of the
tip shaft, or lever of throttle valve, or other lever admitting steam to the Engine
The other projection B acting on the other incline plane comes into action when
the Engine is running too fast either from accident to the driving gear or from any
other cause giving accelerated speed to the Engine, the action to shut off the steam
is the same as described before.
Reference to the Accompanying Drawing.

page_text: 1
B. projecting stud carried along with the Governor rod.
Bend of Governor rod answering the same purpose as stud B.
C. incline plane the stud. B coming against it when the Engine is running ove
speed lifts the Governor rod from off the stud D attached to the lever of the tri
shaft, or lever of throttle valve, or other valve admitting steam to the Engine.
C produces the same effect when the end of Governor rod B¹ comes in contac
with it.
D. stud connecting the Governor rod to lever admitting steam to the Engine.
E. lever on the trip shaft, or throttle valve, or other valve admitting steam to the
Engine:
F. balance weight to shut off the steam: when the Governor rod is' disconnected
from stud D.
G. plate to carry the incline studs CC which can be moved round from position
when required.
H. fixing to carry plate. G with incline studs C C¹.
I. beam to carry fixing H.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed we declare that what we
claim is.
1st. The application of the automatic action as described for shutting off the
steam.
2nd. The application of the same action in stopping the Engine when the Governor
falls below the position due to the speed at which the Engine is required to run either
from accident or other cause.
3rd. The application of the same action in stopping the Engine when the speed is
accelerated from accident to the gearing or other cause.
4th. The general arrangement and combination of parts substantially as herein
before described and shown on the drawing accompanying this Specification.
Dated this 11th day of April 1889.
GEO. HOLCROFT.
JAMES GRUNDY.