Improvements in Means for Fixing in Position Signal Levers, Point Levers, Weighing Machine Levers, and other Gear, and in Means for Protecting or Enclosing the same when Out of Use.
Year: 1890

page_text: Date of Application, 2nd July, 1890
Complete Specification Left, 2nd Apr., 1891-Accepted, 27th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Means for Fixing in Position Signal Levers, Point
Levers, Weighing Machine Levers, and other Gear, and in Means
for Protecting or Enclosing the same when Out of Use.
I, THOMAS JENNER of Mill Lane Taunton in the County of Somerset Brewery
Proprietor, do hereby declare the nature of this invention to be as follows:-
In connection with signal levers, point levers, weighing machine levers and other
gear requiring to be fixed in position say for instance when out of use to prevent
tampering with or to protect against injury from shaking when travelling I provide
a clip, crutch or fork which may be lined inside with leather or the like and which
serves to grip or hold the steelyard or other part when not used for weighing being
of especial use for preventing injury to weighing apparatus applied to carts, waggons
and railway trucks during travel. This clip or crutch is formed on a lever which
is pivoted to the machine framing or other fixed part. To operate this lever for
gripping and releasing the steelyard or other part, I provide a cam tappet crank
twisted bar, screw, rack and pinion slide or other suitable mechanical appliance.
When the cam or other appliance has released the lever the weightier end of the
same withdraws the crutch from the steelyard, aided or not by a spring. In order
to prevent the box or appliance for protecting the steelyard or other gear from
being closed unless the steelyard has first been put out of operating or weighing
position I provide a block stop or bolt, which when in the raised or forward position
prevents the lid from being closed but which can be drawn out of the way by means
of a connection to the device for putting the steelyard or other part out of operation.
The lid may be hinged, sliding, or articulated revolving shutter like.
Dated this 2nd day of July 1890.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Means for Fixing in Position Signal Levers, Point
Levers, Weighing Machine Levers, and other Gear, and in Means
for Protecting or Enclosing the same when Out of Use.
I, THOMAS JENNER of Mill Lane Taunton in the County of Somerset Brewery
Proprietor 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 :-
In connection with signal levers, point levers weighing machine levers and other
gear requiring to be fixed in position say for instance when out of use to prevent
tampering with or to protect against injury from shaking when travelling I provide
a clip crutch or fork which may be lined inside with leather or the like and which
serves to grip or hold the steelyard or other part when not used for weighing being
of especial use for preventing injury to weighing apparatus applied to carts
waggons and railway trucks during travel. This clip or crutch is formed on a lever
which is pivoted to the machine framing or other fixed part. To operate this lever
for gripping and releasing the steelyard or other parts I provide a cam, tappet,
crank, twisted bar, screw, rack and pinion, slide or other suitable mechanical
appliance. When the cam or other appliance has released the lever the weightier
end of the same withdraws. the crutch from the steelyard, aided or not by a
spring.

page_text: "
In order to prevent the box or appliance for protecting the steelyard or other
gear from being closed unless the steelyard has first been put out of operating or
weighing position I provide a block stop or bolt which when in the raised or forward
position prevents the lid from being closed but which can be drawn out of the way
by means of a connection to the device for putting the steelyard or other part out
of operation. The lid may be hinged, sliding or articulated revolving shutter like.
Fig. 1 of the accompanying drawings is a vertical transverse section through a
box in which the steelyard and other parts of a weighing machine are enclosed and
which for instance may be applied to the weighing machine framing or to the side
of a cart or railway truck provided with a weighing machine as described in my
Patent Specification No. 4813 of 1890. Fig. 2 is a front view and Fig. 3 a plan
section. A indicates the door of the box and B the inner side of it which may in
some cases as stated be formed by the side of a cart. C is the steelyard and D a
double armed lever mounted on a fulcrum pin fixed on the part B and having at
one end a clip crutch or fork D¹ gripping the bottom and sides of the steelyard
the other end D2 being acted upon by a cam E which is fixed to the inside of the
door A. This action takes place when the door is being closed, so that the cam E
then coming in contact with and depressing the end D2 of the lever causes the other
end D¹ to be raised and thereby lifting the steelyard C slightly and holding it
securely. When the door is opened and the weighing machine is to be used the
cam is withdrawn from the lever, the heavier end D₁ of the same then dropping
down (aided or not by a spring) and leaving the steelyard C free for action.
Figure 4 is a vertical transverse section, Figure 5 a front view and Figure 6 a
plan of another arrangement in which the door cannot be closed until the steelyard
and the weighing levers are put out of operation or lifted. F is the operating
handle or lever which is connected to the platform levers. It is by the rod G
jointed to one end of a lever H the other end of which is jointed to a block or stop
working in vertical guides and in its raised position as shewn acting so as to prevent
the lid or its lower hinged part A from being closed. When the handle F is raised
the block I is depressed and the door A can then be closed (or the connection
between the lever F and the block I may be in various other ways while producing
the same result). On the inside of the door is fixed a cam E which when the door
is being closed depresses one end D' of a lever the other forked end D¹ of which is
thereby raised and gripping the steelyard C lifts it and supports it. When the door
is opened the forked end D¹ being the heaviest drops down again thus leaving the
steelyard C free for action.
Figure 7 is a vertical transverse section and Figure 8 a front elevation of another
form where the lid or door A. of the box is made to slide up and down. To prevent
it from sticking laterally I may when the width is great relatively to the height
provide means such as here shewn, viz. a spindle S with a small pinion S¹ at each
end working in racks S² fixed at top and bottom to the box.
a are handles for
taking hold of the door. Figure 9 is a vertical transverse section of another
means, viz. two eyes S¹ on each side of the lid guided on two rods S² fixed at top
and bottom to the box. In Figures 10 and 11 is shewn in front view and vertical
transverse section respectively, yet another means, consisting in two balance
weights T hung on cords T¹ passing over pulleys U. Other suitable means than
those here shown may be applied. As an alternative I may use toggle levers for
raising and lowering the lid or door. The cam E on the sliding lid A serves to
raise the steelyard C when the box is being closed.
Figure 12 is a sectional elevation of an arrangement of railway signal box and
signal post where the door of the signal box is so connected with the signal
lever that the door cannot be closed by the signalman in case of his leaving the
box, unless he has first put the signal to "danger." For this purpose I provide
just within the door A a stop rod E connected to a bell crank lever D which by
rod D' with slotted end is connected to the signal lever F. The latter is shewn in
the "danger" position and thus only can the door A be opened and closed. Or as
shown in Figure 12A in detail the door stop is made in the form of a spring catch,

page_text: allowing the door to open with signal at any position but not to close except when
signal is at danger. The slot in end of the rod D' provides for lost motion as
the stop rod E need only be raised when the lever F approaches the "clear
position.
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Figure 13 shews another form of stop for the signal box A, where the rod D'
from the signal lever F is formed with a wedge shaped end D, which when the
lever F is put to "danger" is withdrawn from under a hinged wing shaped stop E.
E' is a guard to prevent tampering with the stop E.
Figure 14 shews yet another form where the rod D' is connected to a disc D which
is provided with a stop cam E. Naturally all these arrangements may be made to
operate overhead if convenient instead of under the floor.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
First. The application and use in connection with boxes enclosing weighing
machine levers or other gear of a hinged or sliding lid or door which by the action
of closing causes the machine to be put out of gear or certain parts thereof to be
protected against injury from friction or concussion substantially as set forth.
Second. The application and use in connection with boxes enclosing weighing
machine levers or other gear of a hinged or sliding lid which cannot be closed until
the steelyard or other gear has first been put out of gear, the act of closing the lid
serving to hold it out of gear substantially as set forth.
Third. The construction of lids and gear connected therewith shewn on the
drawings.
Fourth. The application and use for doors of railway signal boxes and the like
of a stop which is so connected with the signal lever that the latter must be put
into the "danger" position (or the machines be thrown out of gear) before the door
can be closed or opened as desired substantially as set forth.
Fifth. The constructions of door stop gear shewn on the drawings.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
un nuz m
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.