US1580568A - Instrument for measuring pressures and forces - Google Patents

Description

April 1a 192s.- K, v1,580,568

' J. G. PAULIN i xus'rnunur ro'n naAsunxue rnsssunss um ronca.:

Fned nay 15,' i922 which theA tension of the sprin may be regu.-

irectly vor in Patented Apr., l, 1926.

unirse srATas Laaste .PATENT carica.

JOSUA GABRIEL PAULIN, OF STOCKHOLM, SWEDEN.

INSTRUMENT FOB ME'ASURING PRESSURES ANI) FORCES.

Application led May 13,

To aZZ whom t 'may concern.'

Be it known that- I, JosUA GABRIEL PAULI'N, a subject of the King of Sweden, and resident of 31 Hollandaregatan,

Stockholm; Sweden, have invented certain new and useful Improvements in Instruments for Measuring Pressures" and'. Forces,

movable organ being connected with an angular-bent strap or string connected with the stand of the instrument and by a second strap or string running from the knee of the first-named strap or string to a springactuated shaft with which is connected an index.

The invention is illustrated in the annexed drawings, in which Fig. 1 shows a galvanometer, amperemeter, or voltmeter on the electromagnetic principle. Figs. 2 and 3 show a-barometer.

ln Fig. 1, an electric current to be measured passes through a solenoid or electromagnet l. An armature 2 is xed to a lever 3 fulcrumedat the point 4. On the end of the lever 3 ac ts a spring 5', the other end of which is fastened to the nut 6 guided by the pins 7 and acted upon by a screw 8, by

lated. This vtension can bedirectly read n the scale 9. s

The movements of the armature may# be observed by means ot an arm -or index direct to the lever 3 and moving over a scale, which may,.for instance, be provided with a zero-point in its center. The reading is obtained by bracing or slackening the spring by means of the screw 8 until the index points to zero. The tension of the spring, as read on the scale 9, is a measure of the intensity of the current passing through the solenoid 1.

It is, however, important that the transmission of the movement of the movable member to an index bebrought about in the simplest and mostrictionless wa According to the present invention' t .is may be done in the following manner: From a point irmly'connected with the said movable member to a point immovably cnnected with the xed stand of thejinstruinent there 1922. Serial No. 560,849.

is stretched a flexible band, strap, or string, from' the-middle of which is stretched another bander string, the other'end of which is fastened to a point iirmly connected.

with the shaft o f the index, thefirst-named band or string being thus bei-it inV its 'middle in'toja knee, preferablyin theflorm of an obtuse angle.,

' In Fig..1 an arrangement fis shown for indicating thef'movements` of the armature Vof fa"4 galvanometer.

An` arm 10 is firmly connected with the armature-2. The pillar 11 is ixed to the base-platev of the instrument. From the point 13 on the arml to the point12 on the pillar 1l" is stretcheda flexible band or string 14:. From the middle ofthisband orA string is stretched another band or string 15, whose otherv end is fastened to the point 17 .on the index shaft 16.

A second system of bands or strings may,

of course, be arranged in, symmetry with the former oneras shown in the figure. This latter system tends to turn' the index shaft 4in thesame direction as the former systeml under the action of the movements of the armature. The bands or strings are being bands or strings applied, in a known manner.

It is, however, preferable to suspend the index shaft in the manner described below with reference to Figs. 2 and 3.

The mode of operation of the instrument right. By means of the screw S the spring 5 is stretched until the index points to zelo. 'If properly graduated, the scale can indicate the strength or tension of the current.

Figs. 2 and 3 illustrate the application ofthe invention on thev construction of a barometer. The instrument is placed on a base-plate 19. 20 is an ordinary'evacuated diaphragm (membrane) box, 21 a clamp screwed on to the upper side of the box 20 and to the disc. 22. The .coil 23 is fastened to the disc '22 and to the screw-threaded ring 24, which has two projecting arms 25 provided at their ends with apertures fitting tocylindrical rods 26 actin as guides, when the ring 24 is being raise or lowered. A nut 27 for the threadedring 24 is fixed to the disc 28, which is'supported by a ring clamp i ,dez and movii cve?? ihre scaic 1f manas c n pair o' sso; me@ acicw L22, which la* 'oii Si by 'means of The disc 28 may be provided 'with c, in miiiimecefs of mercuy. A m my bf use as incx 011 the i The fzoovev described mcd@ suspending the ind 2; shaft 'su two Qoii-sp'fins? insteaci of journaling it i cnc 'Known manne?? may aise be appiicf 'to iiisisiimicmsa which are :coja constructed on @im izeic-measiu I iincipiey buf@ in which im indica@ c7 ''ic movements ci' mcfvable member shows thc rassure, the intensi@ ciiffi'cn, ctc., dizecJ en a.

Havin' now desc'ibec. imVcifiior;g what daim as new mi ccsirc secure 'by .Letters ent is Pia mcmbef and.

icm-35, a kuechen-c 3 one enc?. nim/anic mcmbcf w 'me frame ci; ne i be?? Lc the sai pum-csc svi indcgg mmbic io 9 comme' coimtefaci' 'moans asscciaic@ lc'tai5riin L- in@ calc, mces'., amusmoic, mici spring means zec mitii@ q movements of *dic die imei inscmmcng foi; measuring fini" .vici-,suics ccmpi'ising am incl vying in@ imci, a diap'iu'a pcs/e6, to h@ inici icssiiic5 sgui'ing means '-cimcctc. Wi'l; said iaphizigm dcvicc u f" @imfucmc'ng the mici pzcssmcj adgus" 'wi'ii 'Erie spring; means r 'ipi1i'agm lita. 2cm poni icn, fi '.icxibfle member having; "me one am?. iicrco :iixc i@ the mmabic member mici, 'die oie ciu-l fix-cd "zo the 'fr of ik@ insifumcn, L connection. exten@ :imm che ciiibie member "L0 'iie ina Trying shaft for che. puiposc of transmit- *che movsmcnts the said. mova'be mcmnci io index sm have hereunto sc Witness wbcreoi i my nano-.

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