Improvements in Apparatus for Indicating Weight and Pressure, applicable also to Counting Devices.
Year: 1890

page_text: Date of Application, 14th Mar., 1890
Complete Specification Left, 15th Dec., 1890-Accepted, 31st Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Indicating Weight and Pressure,
applicable also to Counting Devices.
THOMAS DAVIES, 297, Main Street, Bridgeton, Glasgow, Weighing Machine
Maker, do hereby declare the nature of this invention to be as follows:-
My invention consists of an automatic self-registering machine indicator or dial,
actuated by a system of levers and ratchet wheels, instead of springs or other
arrangements as at present in use in spring balances, gauges, or other self-registering
dial indicators, whether in use or connected with weighing apparatus, or otherwise.
By my plan the weight is suspended from, or pressure exerted on a lever of the
first or second order, which is connected with another lever or system of levers on
which a ratchet is fixed, which works in a toothed or other connection or arrange-
ment, and being part of the spindle on which is carried the index finger. By com-
pounding the levers according to the difference of the divisions thereof my invention
may be used as a counter or enumerator, for by putting one or more articles as may
be arranged on the small scale suspended from the ratchet lever the number of
articles placed on the larger scale suspended from the principal lever will be an
exact multiple of the number of articles on the small scale, provided the articles
are each of the same weight. This arrangement may be used for making up given
quantities of goods, such as pins, pens, needles, bobbins of thread, or other articles,
whether large or small, which may require to be weighed or counted, the appliance
being equally adapted for determining the weight of the largest boiler or other
casting or machinery, and in fact any weight which it is possible to place upon a
scale.
Dal 19th day of Moh 1800
A. G. PRITCHARD,
Agent for Applicant.
COMPLETE
SPECIFICATION.
Improvements in Apparatus for Indicating Weight and Pressure,
applicable also to Counting Devices.
1, THOMAS DAVIES, 297, Main Street, Bridgeton, Glasgow, Weighing Machine
Maker, 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 consists of an automatic self-registering machine indicator or dial
actuated by a system of levers and ratchet wheels, instead of springs or other
arrangements as at present in use in spring balances, gauges, or other self-registering
dial indicators, whether in use or connected with weighing apparatus or otherwise.
By my plan the weight is suspended from or pressure exerted on a lever of the first
or second order, which is connected with another lever or system of levers on which
a ratchet is fixed which works in a toothed wheel or other connection or arrange-
ment being part of the spindle on which is carried the index finger. By compounding
the levers according to the difference of the divisions thereof my invention may be
used as a counter or enumerator, for by putting one or more articles as may be.
arranged on the small scale attached, connected with or suspended from the ratchet
lever, the number of articles placed on the larger scale suspended from the principal
lever will be an exact multiple of the number of articles on the small scale, provided
the articles are each of the same weight. This arrangement may be used for making
up quantities of goods, such as pins, pens, needles, bobbins of thread or other

page_text: articles, whether large or small, which may require to be weighed or counted, the
appliance being equally adapted for determining the weight of the largest boiler or
other, casting or machinery and in fact any weight which it is possible to place
upon a scale or to suspend from the machine.
And in order that, ny said invention may be properly understood I have here- 5
unto appended two explanatory sheets of drawings whereon
Fig. 1 is a sectional back elevation.
sectional pin.
Fig. 4 is a detail view to an enlarged scale.
Fig. 4 shows a balance lever for the apparatus Figs. 1, 2 and 3.
Fig. 5 is a sectional elevation of the counting part of the apparatus.
Fig. 6 is a detail view.
Referring to the drawings whereon the same reference letters wherever repeated
indicate similar or like parts.
A is the dial plate. B, the framing. C is the index finger. D the spindle
carrying the index finger. E is a "Wood and Davies "anti-vibration wheel fitted
on the spindle. Fis the tank enclosing said wheel. Gis a frame carrying the
index spindle. His a bent lever fulcruined at H in a hook-bracket I. The lower
end of the lever H has an adjustable weight H³ on it and at its upper bent-over-
part Hit is forked or branched out as shown at Figs. 2 and 3 and carries on the
jaws or forks a centre or cross-bar on which is hooked a vertical rod K. L is a
lever which is fulcrumed at one end, at L', in a bracket M and is carried at its
other end 2 in the loop K¹ of the vertical rod K. From the knife edge L³ is
suspended the rod or lever O'connecting to and receiving motion from the
platform, scale or other part of the weighing machine. The goods may, if desired,
be suspended directly from the lever Oas in a crane machine.
To the vertical rod K, is connected, by a bracket N, a vertical rack 0 which has
- spring at its lower end for the purpose of keeping a tension on the rack O.
Pis an adjusting screw.
The upper end of the rack O works in the teeth of a pinion Q, shown more
particularly at Fig. 4. To keep the rack O in position there is fitted to the arm GI
of the frame G a friction wheel K which may be grooved as shown at Fig. 3 so as
to prevent lateral movement of the rack.
The weight H³ may be changable so that the spaces on the dial may be larger or
sinaller as desired.
S is the enclosing casing or box fitted to the machine and it may be provided
at S with a door.
The modus operandi of the apparatus is as follows-When weight is put upon the
platform or scale of the machine, tension is exerted on the connecting lever O¹
which is transmitted to the lever L causing it to move downwards, turning on the
fulcrum L. This downward movement of the lever L pulls down the connecting
rod K and lifts or turns the lever H against the action of the weight H³. The
downward movement of the rod K also takes down with it the rack O. The down-
ward movement of the rack turns the pinion Q and the spindle D so moving the
index finger C to indicate the weight. Immediately the weight is taken off the
machine the counter weight H³ brings back the mechanism to its normal position
ready for another indication.
To balance the weight of the under levers of the platform or scale and connections
and so make the weighing more accurate, there is, preferably, fitted on the machine
a balance lever T indicated in dotted lines at Fig. 1 and shown more particularly
at Fig. 4. The lever T, which has on its long arm an adjustable or suspended
weight T, turns upon the fulcrum T in the standard T. The short arm is
connected as shown at Fig. 4" to the connecting lever O' of the machine. The
weight T on the lever T balances the weight of the connections and under levers
of the platform or scale. Instead of the connecting lever O being used the con-
necting rod K may be fitted in connection with the platform and the lever O' be

page_text: dispensed with. In this case the balance lever T would be connected at one end to
the rod K and be fulcrumed at any suitable part in its length as indicated in dotted
lines at Fig. 1.
In Fig. 5 the lever L is shown as adapted for counting articles. The lever Lis
in this case fulcrumed on a large bracket M which has, on its upper side, rails m
(see Fig. 6). On the rails runs a small carriage a, consisting of two pieces jointed
together by a band ' or equivalent. are the carriage wheels. In this movable
carriage is fulcrumed, at m³, the lever L. The,lever L is, as shown, cut out at U,
and in this cut out part or slot the carriage slides. To actuate the carriage a
screwed spindle V is provided which passes through from end to end of the lever L.
It also passes through the carriage as shown at Fig. 6. The opposite end of the
lever L is also cut out or slotted at U' and in the slot slides a block W from which
c is a
is suspended a weight W The screw V passes through the block W.
small scale or platform and T is a balancing lever, similar to Fig. 4* saving that
the weight T is fixed instead of adjustable as on the former arrangement. The
weight T is so made as to nearly counterbalance, when on the lever T, the weight
of the platform or scale levers and connections. Y is a door which can be opened
so as to place articles on scale.
When it is desired to count or enumerate articles with the machine one or
more of the articles are placed on the small scale, the number of articles
placed on the larger scale or platform suspended from the principal lever
of the machine will be an exact multiple of the number of articles on the
small scale provided the articles are each of the same weight. Thus, for instance,
supposing a small article, such as a bobbin of thread, is placed on the scale.
with a machine so adjusted that the leverage is as 72 to 1, and shows say 65
on the dial, the filern centre must be screwed in until it shows 72. The bobbin
is then removed and the quantities put upon the platform or large scale of machine
The adjust-
up to say 10 or 20 gross will be accurately declared on the dial face.
ment of the leverage and balance is attained by moving in or out the screwed
spindle V which moves the centre or fulcrum mounted on the carriage
weight W
and the
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-
1. In apparatus of the class set forth, the arrangement of levers and rack
mechanism for indicating weight or pressure substantially as hereinbefore described
with reference to Figs. I to 4 of the drawings annexed.
2. The combination with the hereinbefore described weight or pressure indicating
mechanism, of the balance lever T and weight T, substantially as hereinbefore set
forth.
3. The contrivance for counting or enumerating articles, substantially as herein-
before described with reference to Figs. 5 and 6 of the drawings annexed.
Dated this 13th day of Decemb
1000
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.