Improvements in Recording Mechanism for Weighing Apparatus.
Year: 1899

page_text: Date of Application, 30th Dec., 1899
Complete Specification Left, 30th Oct., 1900-Accepted, 15th Dec., 1900
PROVISIONAL SPECIFICATION.
Improvements in Recording Mechanism for Weighing Apparatus.
I, CHARLES INGREY, of 32, Victoria Street, Westminster, in the County of
London, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in recording apparatus suitable for use
in connection with weighing apparatus such as described in the Specification
of former Letters l'atent granted to me No. 22126/95 but also applicable for use
in connection with weighing apparatus, the object of my invention being to
render such apparatus more effective and accurate than hitherto and to obviate
the evil effects of vibration.
According to my present invention I provide for operating the recording
mechanism after, instead of during the weighing operation.
In carrying out my invention I employ a spring or springs or a weighted lever
moved by the action of the load after the manner of an ordinary weighing
machine. I transmit motion to a hand or pointer by means of a rack and pinion,
the said pinion being made to run loose upon its spindle and formed with an arm
or carrier which can come into contact with a wheel which is fixed to the spindle
and upon the periphery of which wheel ratchet teeth are cut. Upon the spindle
I also fix a wheel on which a weighted cord or chain is wound, the weight being
enclosed within a tube or cylinder containing parattin or other liquid.
A hinged bar or lever carries pawls which can engage with the ratchet teeth
on the wheel.
When the weighing operation is being performed the rack turns the pinion
and the carrier or arm moves the wheel to the position determined by the load,
the pawls at the same time engaging with the teeth. When the operation of
weighing is concluded the rack returns to its normal position leaving the wheel
retained by the pawls. At or near the conclusion of the return motion of the
weighing machine I cause motion to be conveyed to a crank or cam which
operates the said hinged bar or lever and raises the pawls out of gear with the
ratchet teeth on the wheel, whereupon the weight and cord descend and turns
the pulley giving motion to the spindle and thereby to the counting or integrat-
ing apparatus of the recording machine.
D
1
LT
20th day of Decembar 1900
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.

page_text: Improvements in Recording Mechanism for Weighing Apparatus.
I, CHARLES INGREY, of 32, Victoria Street, Westminster, in the County of
London, 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 improvements in recording apparatus suitable for use
in connection with weighing apparatus such as that described in the Specification
of former Letters Patent granted to me No. 22126/95 but also applicable for use
in connection with ordinary weighing apparatus, the object of my invention
being to render such apparatus more effective and accurate than hitherto and
to obviate the evil effects of vibration.
According to my present invention I provide for operating the recording
mechanism after, instead of during the weighing operation.
In carrying out my invention I employ a spring or springs or a weighted lever
moved by the action of the load after the manner of an ordinary weighing
machine. I transmit motion to a hand or pointer by means of a rack and pinion,
the said pinion being made to run loose upon its spindle and formed with an
arm or carrier which can come into contact with a wheel which is fixed to the
spindle and upon the periphery of which wheel ratchet teeth are cut. Upon
the spindle I also fix a wheel or drum on which a weighted cord or chain is
wound, the weight being enclosed within a tube or cylinder containing paraffin
or other liquid.
A hinged bar or lever carries pawls which can engage with the ratchet teeth
on the wheel.
To enable my invention to be fully understood I will describe how it can be
carried into practice by reference to the accompanying drawings, in which :-
Figure 1 is a front elevation partly in section; and
Figure 2 is a side elevation of my improved recording mechanism for weighing
apparatus:
Figure 3 is a sectional side elevation of the indicating mechanism; and
Figure 4 is a section on the line 44 of Figure 3:
Figure 5. is a front elevation; and
Figure 6 is a side elevation illustrating a modification.
Figures 3 to 6 are drawn to a larger scale than Figures 1 and 2.
A is the case of the apparatus, B the dial, C the hand or pointer moving
over the said dial and D, 1 the apertures in the dial through which the record-
ing or counter discs are read off.
a is the spring of my recording mechanism which is attached at one end to
a flanged ring 6 seated in a shouldered recess in a plate e clamped between the
upper and lower parts of the case A, and at the other end to a piston d working
in a cylinder e fixed to the plate e; the piston d is carried by the lower
end of a tube f located within the spring a and working through the ring b
and provided with a number of holes a¹, the upper end of the said tube being
secured to the crosshead g forming part of a frame h, the lower end of which
is attached to the weigh-beam of the weighing mechanism. In the centre
of the piston d is a hole j in which is adjustably located the pointed end of
a rod guided in the tube f by means of a collar 7 having cut away portions
in its periphery, the upper end of the rod k being provided with a screw thread
working in the crosshead y and with a squared head m to allow the adjustment of
the rod to be effected. The part of the cylinder e below the piston d is filled with
a suitable liquid which, when the piston is drawn down by the weigh-beam i, as

page_text: it is when weighing goods, the liquid cushions the piston and rushes through
the holes and a¹ to the opposite side of the piston which, with the cylinder
thus constitutes a dash pot.
n is the rack and o the pinion for transmitting motion to the hand or pointer C,
the said rack being fixed to the crosshead g; p is the spindle on which the pinion o
runs loose and to the front end of which the hand or pointer C is fixed; q is the
arm or carrier fixed to the pinion o and designed to come into contact with a
pin on the wheels fixed to the spindle 2, upon the periphery of which wheel
teeth t are formed engaging with the teeth of a wheel e running loose upon
the spindle a of the recording mechanism and provided with pawls 63 engaging
a ratchet wheel fixed to the said spindle, a second ratchet wheel d² on the
spindle a being engaged by a detent pawl 2 on the frame b¹; u is the wheel
or drum on which the cord or chain is wound and w is the weight on the
cord or chain the said weight being enclosed within a tube or cylinder x contain-
ing paraffin or other liquid and acting as a dash pot.
y is the bar or lever hinged at z to the frame b¹ of the mechanism and
carrying pawls c, c¹ engaging with the teeth of the wheel s, the said bar or
lever being adapted to be lifted when required by means of a crank or cam d¹
operated by mechanical means from the weighing mechanism so as to release
the wheels for the purpose hereinafter referred to.
When the weighing operation is being performed the rack n is, through the
herein before described arrangement of spring piston and frame, drawn down
by the weigh-beam i and turns the pinion o, and the carrier or arm q moves
the wheel s to a position determined by the load, thereby rotating the spindle ?
and turning the hand or pointer C so as to indicate the weight on the disc B
and at the same time winding the weighted cord or chain on to the wheel u
and rotating the wheel e¹ so that its pawls override the teeth of the wheel c
and do not operate the recording mechanism, the pawls c¹, cl engaging with the
When the
teeth and preventing any backward movement of the wheel s.
operation of weighing is concluded and the load has been removed, the rack n
returns to its normal position leaving the wheels retained by the pawls c¹, c¹.
At or near the conclusion of the return motion of the weighing apparatus the
crank or cam d' is operated as already stated by the weighing mechanism so as
to lift the bar or lever y and raise the pawls c¹, c¹ out of gear with the teeth
on the wheels whereupon the weight w and cord or chain turn the wheels u, s
and e¹ which wheel e by means of its pawls rotates the wheel e2 and thereby
gives motion to the recording apparatus of ordinary construction the dials
of which indicate through the apertures D D in the dial B.
The motion of the cam d¹ to lift the lever y is preferably obtained from the
return motion of the weigh lever of the weighing machine, but in cases where the
invention is applied to ordinary weighing machines this motion is performed
by an operator moving a lever in connection with the said cam d.
It is possible that a load might be placed on the weighing apparatus of a
greater weight than is provided for by the indicating mechanism, in which
case the wheels having made more than a complete revolution the arm q being
stopped by the pin r would not return to its initial position and would exert so
great a pressure upon the pin that the wheel s might thereby become damaged.
I may therefore find it of advantage to employ the modified arrangement
of mechanism illustrated in Figures 5 and 6. In this arrangement instead
of the pin r being on the wheels, it is carried by a second arm or carrier fi
turning loose upon the spindle p, at the opposite side of the wheels to that on
which the arm or carrier q is placed, the pin r projecting through between two
of the spokes of the wheel so that the extent of movement of the arm or carrier f¹
is limited by these spokes. In the event of the wheels being carried by an exces-
sive load round more than a complete revolution, the arm or carrier will be
enabled within the limit comprised between the said two spokes to return to its
normal position, instead of being stopped by the wheel s.

page_text: 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. In recording mechanism for weighing apparatus the provision of means
whereby the said mechanism is operated after instead of during the weighing
operation, substantially as and for the purpose herein before described.
2. In recording mechanism for weighing apparatus the use of a hinged lever
and of a pawl or pawls for locking the recording mechanism until it is released
by independent mechanical means, substantially as, and for the purpose described.
3. In recording mechanism for weighing apparatus the employment of a tube
or cylinder containing liquid in which a previously wound up weight can fall
and operate the recording mechanism, substantially as, and for the purpose
described.
4. Recording mechanism for weighing apparatus consisting of the parts con-
structed, arranged and operating, substantially as herein before described and
illustrated in the accompanying drawings.
Dated
the oven day of October 300.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.