US1161168A

US1161168A - Stuff-meter.

Info

Publication number: US1161168A
Application number: US87572014A
Authority: US
Inventors: Edward James Trimbey
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-12-05
Filing date: 1914-12-05
Publication date: 1915-11-23
Anticipated expiration: 1932-11-23

Description

E. J. TRIMBEY.

I STUFF METER.

APPLICATION FILED DEC. 5. 1914.

P Patented Nov. 23, 1915.

- Be it known that I,

EDWARD JAMES TBIIVIBEY, OF WINDSOR, QUEBEC, CANADA.

STUFF-METER.

eme.

Specification of Letters Patent.

Patented Nov. 23,1915.

Application filed December 5, 1914. Serial No. 875,720.

In the present state of the art of paper making there is no rapid method of determining the per cent. consistency of wet pulp as it is pumped to the heaters or to the mixing tanks, or of wet paper stock as it is pumped to the head-box of the Jordan engine or as it is pumped to the head-box of the paper machine, the Jordan engine being a machine for further refining the fibersaftr having passed through the heaters and before going to the paper machine.

The term per cent. consistency as used in this specification means the number of parts of bone-dry matter in one hundred parts of wet pulp or ofwet paper stock.

The object of myinvention is to afford a convenient and rapid method of ascertaining, by ii1spection,- the per cent. consistency of 'Wet pulp or of wet-paper stock containing from three parts to five parts of bone-dry matter per one hundred parts of wet pulp or of wet paper stock as the same is being pumped for use in the manufacture of paper, or, for indicating the amount of water which must be added to a given mass of such wet pulp or of such wet paper stock to dilute same to a predetermined lower per cent. consistency, for the purpose of more closely regulating the proportions of the Various kinds of pulp used, and, by maintaining a more nearly uniform per cent. consistency of the wet paper stock supplied to the paper machine to facilitate the obtaining of an approximately uniform weight per ream of the paper made.

To accomplish my object I employ two chambers, one, to which a portion" of the wet pulp or the wet paper stock the per cent. consistency of which is to be determined, is conducted, is provided with an overflow dam for maintaining a constant level and therefore a constanthead on an unalterable orifice cut in a plate of thin metal which is placed in the bottom of this chamber and the discharge from which area.

charge orifice from same.

-ber.

passes into the other chamber; this second chamber communicates at the bottom with an approximately "horizontal unalterable spout of suitable length and cross-sectional The rate of flow into this second chamber is a definite amount being controlled by the constant head inthe first chamber and the size of the unalterable dis- The head in the second chamber is largely controlled by the frictional resistance opposing the flow of the wet pulp or the wet paper stock in the unalterable spout communicating therewith, and as this-frictional resistance varies with the per cent. consistency of the wet pulp or of the wet paper stock, either the per cent. consistency or the amount of Water to be by the height to which the level of the wet pulp or wet paper stock rises in this cham- The height is shown by means of a float supported upon the surface of the wet 'pulp or wet paper stock; this float carries a pointer moving in front of a scale whose graduations are determined by actual tests,

for the grade of wet pulp or of wet paper stock passing through the stuff meter. That the float may not become spattered or covered by the incoming wet pulp or wet paper stock it is protected by means of an adadded for the desired dilution, is indicated justable baffie, which is so adjusted that it ,will project but a short distance beneath the surface, so as to guard against the formation of a stratum of a high per cent. consistency which would gradually be formed if. the baflie projected for any considerable distance beneath the surface and which would bind against the sides of the chamber and interfere with the. free -movement of the surface level of the wet pulp or wet paper stock and thus with the movement of the float.

be to have the wet pulp or the Wet paper ,stock in the supply chests at a somewhat When usingthis apparatus the aim would V pointer so guided as to pass in front of a graduated scale, should show the depth or head of wet pulp or of wet paper stock in a chamber communicating at the bottom with her 1 through the an approximately horizontal unalterable spout when the rate of fiow into-this chamber and through this spout is the amount determined by the discharge through an unalterable orifice in a plate of thin-metal under the influence of a constant pressure, this constant pressure being maintained by means of anoverfiow dam of a given height in a separate chamber in the bottom of which is located the un'alterable orifice. It is alsoessential that the chamber communieating at the bottom with the unalterable spout should be provided with a baflie which can be vertically adjusted, that the plane of this battle should be approximately perpendicular to the axis of the spout, and that the wet pulp or the wet paper stock should enter the chamber at the ,top and on the side of the baffle opposite to that at which communication is had with the spout.

As it is the general practice to use a headbox in which a constant level is maintained for regulating the supply to the Jordan engines or to the paper machines the unalterable orifice can be located in the bottom of the regular headsbox in such cases. The unalterable spout is preferably provided with a contracted outlet end to resemble a nozzle, though this feature is not essential; this spout may either be straight, as shown in the accompanying drawings, or be bent if found more convenient.

One construction of my apparatus is shown by the accompanying drawings in which*- Figure 1 is a sectional elevation on the both views.

A portion of the wet pulp or of the wet paper stock, the per cent. consistency of which is to be determined, enters the champipe 2 and flows into one compartment 10 of the chamber '5 through the unalterable orifice 3 in the thin plate of metal 4; the excess not passing through the orifice 3 flows over the partition or dam 6 and passes back to the supply chest through the pipe 7. The upper part of the chamber 5 is divided into two compartments 10 and 11 by the movable partition 8 which is adjustable vertically and is restrained from sidewise movement by the grooves 9. In the compartment 11, protected from the I spattering, and the agitation of the surface caused by the incoming wet pulp or wet paper stock, by the movable partition 8 is the float 12 to which is attached the stem 13 carrying the pointer 14 which passes in front aaemea of the graduated scales 15 as the surface level changes and the float 12 rises and falls in response thereto. The stem 13 is guided and restrained from sidewise movement by the guides 16 which are attached to the body of the chamber 5, and which also support the graduated scales 15. After passing through the chamber 5 the wet pulp or the wet paper stock passes through the unalterable spout 17 and is discharged through the contracted end 18 of this spout and is conducted back to the supply chest by the pipe 20, having a suitable inlet 19 and discharging into the pipe 21, into which the pipe 7 also discharges. From the supply chest 22, the pulp or paper stock is circulated through the main supply pipe 23 by means of the pump 24.,'a portion of the pulp .-or paper stock being discharged through the branch pipe 2 into the chamber 1. The regulable water supply pipe is indicated at I do not wish to restrict myself to this specific construction of the stuff meter, but what I claim as my im'ention is,

1. A stuff meter for wet pulp and wet paper stock, comprising a constant level chamber having a discharge orifice maintained under a constant head of the pulp or paper stock, a variable level chamber arranged to receive the pulp or paper stock discharged from said orifice and provided with an outlet of suitable size and proportion to cause a frictional resistance to the flow of the pulp or paper stock therethrough, and thereby maintain a head of the pulp or paper stock within the chamber varying with its consistency and frictional resistance, and means for indicating variations in the head of the pulp or paper stock in said chamber; substantially as described.

2. A stufi meter for wet pulp and wet paper stock, comprising a constant level chamber having an overflow dam for maintaining a constant level therein and pro- "ided in its bottom with a discharge orifice in a thin plate of metal, and a variable level chamber arranged to receive the pulp or paper stock discharged under a constant head through said orifice; substantially as described.

3. A stufl meter for wet pulp and wet paper stock, comprising a constant level chamber having a discharge orifice maintained under a constant head of the pulp or paper stock, a variable level chamber arranged to receive the pulp or paper stock discharged from said orifice and provided with an outlet of suitable size and proportion to cause a frictional resistance to the flow of'the pulp or paper stock therethrough, and thereby maintain a head of the pulp or pa-perstock within the chamber varying with its consistency and frictional resistance, said variable level chamber having an adjustable partition therein dividing the memes same into two compartments, in one of which the pulp or paper stock is received, a float within the other of said compartments arranged to be actuated by variations in the level of the pulp or paper stock, and a pointer carried by said float and cooperating with a suitable scale for indicating the consistency of the pulp or paper stock; substantially a described.

4:- A stufi' meter for wet pulp and Wet paper stock, comprising a constant level varying with its consistency and frictional resistance, said variable level chamber having an adjustable partition therein dividing the same into two compartments, in one of which the pulp or paper stock is received, a float within the other of said compartments arranged to be actuated by variations in the level of the pulp or paper stock, and a pointer carried by said float and cooperating with a suitable scale for indicating the amount of water to be added to a given mass of the pulp or paper stock to dilute the same to a predetermined lower consistency; sub stantially as described.

5; A stuff meter for wet pulp and wet paper stock, comprising a constant level chamber having a' discharge orifice maintained under a constant head of the pulp or paper stock, a variable level chamber arranged to receive the pulp or paper stock discharged from said orifice and provided with an out: let discharge pipe leading from the bottom thereof at one side, said discharge pipe being of suitable size and proportion to cause a frictional resistance to the flow of the pulp or paper-stock therethrough, and thereby maintain a head of the pulp or paper stock within the chamber varying with its consistency and frictional resistance, said variable level chamber having an adjustable partition therein dividing the same into two compartments, from one of which the discharge pipe leads and into the other of which the pulp or paper stock is received, and a float in the former of said compartments,ar-'

ranged'to be protected from spattering of the inflowing pulp or paper stock by said partition; substantially as described.

6. A stuff meter for Wet pulp and wet paper stock, comprising a constant level chamber having a discharge orifice maintained under a constant head of the pulp or paper stock, a variable level chamber arranged to receive, at one side thereof, pulpor paper stock discharged from said orifice, and provided with an outlet discharge pipe from the bottom'thereof at the other side of suitable size and proportion to cause a frictional resistance to the flow of the pulp or paper stock therethrough, and thereby maintain a head of the pulp or paper stock within the chamber varying with its consistency and frictional resistance, an adjustable partition in said chamber below which the pulp or paper stock must pass, and a float on the opposite side of said partition from the pulp or paper stock inlet, whereby the pulp or paper stock in said variable level chamber is kept in motion and continually changing; substantially as described.

EDWARD JAMES TRIMBEY. Witnesses:

ANGUS MQINTYRE, FRANK WILLIAM ANNANDALE.