An Automatic Locking Device for Railway Platform Trucks and the like.
Year: 1898

page_text: Date of Application, 17th Dec., 1898
Complete Specification Left 6th July, 1899-Accepted, 12th Aug., 1899
PROVISIONAL SPECIFICATION.
An Automatic Locking Device for Railway Platform Trucks
and the like.
I, HERBERT HENRY FROST, of Beechwood, Tatton Road South, Heaton Chapel,
near Manchester, in the County of Lancaster, Engineer, do hereby declare the
nature of this invention to be as follows:-
My invention relates to an automatic locking device for railway platform
trucks and the like, and the object of my invention is to lock the wheels of the
truck automatically whenever it is out of use and so prevent the truck from
starting to move upon a platform.
According to my invention I pivot to a bracket secured to the cross timber, or
axle of the front wheels and at a convenient distance behind this timber or axle
the truck handle, which is preferably formed in a loop where passing the cross
timber or axle in order to clear the pin on which the cross timber or axle of
front wheels swivels. To the handle is secured a bar which extends from one
wheel to the other; the ends of this bar fit into the teeth of a pinion cast with
each wheel, or spaces could be made in a separate boss secured to each wheel.
The parts are so arranged that when the handle is raised to draw or push the
truck, the ends of the bar will be lifted or moved clear of the teeth of the
pinions; but as soon as the handle is released it will drop and lock the wheels
by the bar engaging the teeth.
Dated the 16th day of December 1898.
H. B. BARLOW & GILLETT,
Agents for Applicant.
COMPLETE SPECIFICATION.
An Automatic Locking Device for Railway Platform Trucks
and the like.
I, HERBERT HENRY FROST, of Beechwood, Tatton Road South, Heaton Chapel,
near Manchester, 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:
My invention relates to an automatic locking device for railway platform
trucks and the like, and the object of my invention is to lock the wheels of the
truck automatically whenever it is out of use and so prevent the truck from
starting to move upon a platform.
According to my invention I pivot a bracket secured to the cross timber, or
axle of the front wheels and at a convenient distance behind this timber or axle

page_text: the truck handle, which is preferably formed in a loop where passing the cross
timber or axle in order to clear the pin on which the cross timber or axle of the
front wheels swivels. To the handle is secured a bar which extends from one
wheel to the other; the ends of this bar fit into the teeth of a pinion cast with
each wheel, or spaces could be made in a separate boss secured to each wheel.
In the accompanying sheet of drawings--
Figure 1 is a sectional side elevation and Figure 2 a sectional plan of the
front part of a railway platform truck fitted with an automatic locking device
according to my invention.
In these views,-1 denotes the frame of the truck, 2 the cross timber or axle,
3 the front wheels, 4 the handle, 5 the locking bar secured to the handle, 6 the
pair of pinions formed with or secured to the front wheels, 7 the bracket secured
to the back of the cross timber, 8 the pin or bolt on which the cross timber
swivels, 9 the bolt by which the handle 4 is pivoted to the back end of the
bracket, and 10 the slots in the cross timber through which the looped portion
of the handle passes.
The parts are arranged as shown so that when the handle 4 is raised to draw
or push the truck, the ends of the bar 5 will be lifted or moved clear of the
teeth of the pinions 6; but as soon as the handle 4 is released it will drop and
lock the wheels 3 by the ends of the bar 5 engaging the teeth of the pinions 6.
The chief advantages of this arrangement are that it is simple, reliable and
perfectly automatic in its action, it is not liable to get out of order, and can be
easily applied to existing trucks at a very small cost.
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:-
1. The herein described automatic locking device for railway platform trucks
and the like, said device consisting in its essential features of the pinions formed
with or secured to the front wheels, the handle pivoted to the end of a bracket
secured to the back of the cross timber and the locking bar carried by the handle
substantially as specified.
2. In combination, the front wheels 3, pinions 6, cross timber 2, bracket 7,
pivoted handle 4 and locking bar 5 all substantially as and for the purposes
herein set forth.
1 1
.
P
1000
H. B. BARLOW & GILLETT,
Agents for Applicant, 17, St. Ann's Square, Manchester.