Improvements in the Cabs of Locomotives and in the Ventilation of same.
Year: 1899

page_text: Date of Application, 31st Oct., 1899
Complete Specification Left, 30th July, 1900-Accepted, 1st Sept., 1900
PROVISIONAL SPECIFICATION.
Improvements in the Cabs of Locomotives and in the Ventilation of
same.
I, REUBEN THOMAS PRESTON, of the Firm of J Stone & Company, of Deptford,
in the County of Kent, Engineers, do hereby declare the nature of this invention
to be as follows.-
The object of these improvements is to increase the comfort and efficiency of
the diver by supplying him with fresh air, while shielding him against the entry
of ashes and the like, and by enabling him to obtain a clear view of the signals
at all times respective of the glare of the sun through the spectacles and 111e-
spective of snow and other view obscuring matter
The improvements consist in the application to the cab of a locomotive of ven-
tilating appliances so constructed or arranged as to prevent the entry of coal dust,
ashes, and wet, also in the application of means for subduing the glare of the
sun through the socalled spectacles and in means for wiping the outside of same
of snow or other view obscuring matter I provide ventilating devices in the
spectacle sashes or in the frames wherein they are mounted or around the same
o in other suitable parts of the cab, and in connection with these devices, which
may be of many different forms I provide where necessary deflectors or filters
which keep out the ashes and wet The ventilators may for instance be circulai
or rectangular of the hit-and-miss construction On the valves may be so arranged
in connection with sloping air passages that these act as deflectors The spectacles
themselves may form ventilators being made to lift out from then seats so as to
leave an annular space for the entry of the au, and I may give the air a lateral
direction of entry all round by means of a deflecting 1ing around each spectacle,
such ring being attached to the cab O each spectacle itself may be made with
80 wide a sash that the latter projects over the opening and acts as a deflecto!
compelling the air to enter all hound behind the enlarged edge of the sash and
not directly from the front O₁ I surround each spectacle with an annular htt-
and-miss valve with deflector In connection with pivoted spectacles I may pro-
vide deflecting appliances with the same object Ventilators on the induced
current principle may also be applied in conjunction with or formed with deflect-
ing devices
In order to moderate the glare of the sun I make the panes of the spectacles
of a neutral or similar tint I thus give the duve a clearer view through the
glass under certain cucumstances And to further this same object I provide
means for sweeping the outside of the spectacles when obscured by snow or other
objectionable matter With this view I provide at or near the centre and
passing through each pane or outside thereof a spindle carrying a brush or wiper,
a handle inside the cab serving to operate the same
Dated. this Thirty-first day of October 1899
JENSEN & SON,
77, Chancery Lane, London, W.C.
Patent Agents.

page_text: Improvements in the Cabs of Locomotives and in the Ventilation of
same.
I, REUBEN THOMAS PRESTON, of the Firm of J Stone & Company. of Deptford,
in the County of Kent, Engineers, 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
-
The object of these improvements is to increase the comfort and efficiency of
the diver by supplying him with fresh air while shielding him against the entry
of ashes and the like, and by enabling him to obtain a clear view of the signals
at all times irrespective of the glare of the sun through the spectacles and irre-
spective of snow and other view obscuring matter For this purpose I apply to
the cab of the locomotive ventilating appliances either to the cab itself or to the
spectacles and provide the latter with panes of a neutral or similar tint; I also
provide means for wiping from the interior of the cab the outside of the panes
Fig 1 of the accompanying drawings 18 a front elevation of a cab spectacle
constructed according to my invention, Fig 2 a houzontal section and Fig. 3 a
vertical section
The pane a 18 by preference glass of a neutral or similar tint to diminish the
glare of the sun when it shines through the pane It is held in a sash b pro-
ided at top and bottom (or it might be at the two opposite sides) with pivots
which work in bearings e on the frame d that 18 fixed to the front side of the
cab The spectacle can thus be turned round its pivots in one duection on the
other to admit au to the cab as desued The bearings e are in halves held
together by a screw f and a thumb nut g The hook or hasp h which takes on
to the pin on the sash b serves to secure the latter in the proper closed position.
To the frame d having such pivoted spectacles or to a frame having spectacles
not pivoted I apply ventilating appliances, for instance of the hit-and-miss con-
struction, in this example an annular valve o ing but if the spectacle 18 of
a rectangular form then the valves would be flat k8 a knob on the valve or
ventilatoi 3 for adjusting the position of the valve
Fig is a vertical section through a spectacle pane a provided with means
for wiping the outside surface thereof This means consists of a pivot 7 pro-
vided with crutch handle and working in a bush m fixed to the centre of the
pane said pivot carrying on the outer side of the pane a grooved cross bar n in
the groove of which are fixed rubber strips n¹ of the section shown in the cross
section Fig. 5 for wiping the pane
Spectacles, pivoted as described, or not pivoted may be provided with deflectors
for the opposing current of an, when the locomotive is in motion to act against
and thereby induce the hot an within the cab to be drawn out Fig 6 is a plan
View of a spectacle fitted with a deflector o on about one third of the circum-
ference of the frame d The arrows show the action of the outer curient of cool
air and the inner current of heated air induced thereby
The spectacles themselves may form ventilators being made to lift out from
then seats Fig 718 a horizontal section through a spectacle of such a con-
struction The sash 18 made with a central boss d' united to the rim by ribs
or spokes The central screw & having a crutch handle d'carrying the sash b.
The outer side is sloped at b¹ to deflect the meeting air current and thus induce
the withdrawal of the heated air in the cab as indicated by the arrows
I apply to the outer sides of the cab ventilators acting on the induced current
principle Fig 8 18 a plan section of part of a cab fitted with such a ventilator,

page_text: and Fig. 9 is an elevation of the latter. The ventilator is in the form of a
pocket p having a slit opening pl corresponding to a slit or to two or three
round holes in the side of the cab
The arrows indicate the action whereby the
heated air 18 withdrawn from the inside of the cab.
Fig 10 is a plan section of a cab fitted with a ventilator having a similar
action. This ventilator is in the form of two ordinary elbow pipes 9 and g²
screwed on to a screwed nipple 3 nuts being provided for fixing the nipple in
the cab side and for fixing the elbow pipes on the nipple The elbow pipe q' may
be tuined in any desired direction and then fixed by its nut for the purpose of
drawing the air from any desired part of the inside of the cab which the driver
may find most suitable for relieving him of excessive heat and draughts
Having now particularly described and ascertained the nature of my said
invention and in what manner the same 18 to be performed I declare that what
I claim 18.-
For locomotive cabs the application and use of
1. Pivotted spectacles substantially as described for the purpose of ventilation.
2 Spectacles provided with hit and miss ventilating valves substantially as
described
3 Spectacles provided with means for wiping the outside of the panes sub-
stantially as described
4 Spectacles provided with panes of neutral tint or the like for shield.ng
against the glare of the sun
5 Spectacles provided with deflecting appliances substantially as described for
withdrawing heated an from the inside of the cab
6 Spectacles centrally mounted and capable of being raised from their seats
for producing ventilation substantially as described
7 Ventilators on the sides of the cab for withdrawing heated air from the
inside of the cab substantially as described
8. The constructions of spectacles and ventilators shown on the drawings
Dated this Thirtieth day of July 1900
JENSEN & SON,
77, Chancery Lane, London, W C.,
Patent Agents