DE210708C - - Google Patents

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Publication number
DE210708C
DE210708C DENDAT210708D DE210708DA DE210708C DE 210708 C DE210708 C DE 210708C DE NDAT210708 D DENDAT210708 D DE NDAT210708D DE 210708D A DE210708D A DE 210708DA DE 210708 C DE210708 C DE 210708C
Authority
DE
Germany
Prior art keywords
gas
steam
revolutions
machines
vibrations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
DENDAT210708D
Other languages
German (de)
Publication of DE210708C publication Critical patent/DE210708C/de
Active legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/02Devices characterised by the use of mechanical means
    • G01P3/14Devices characterised by the use of mechanical means by exciting one or more mechanical resonance systems

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Nachdem es bekannt geworden ist, die Frequenz von Luftimpulsen durch akustische Resonanzwirkung zu bestimmen, ist man später dazu übergegangen, periodische Luftströme zur Erregung sichtbarer Schwingungen elastischer Resonanzkörper zu verwenden, und zwar können dabei, wie bekannt, die Luftwellen entweder künstlich erzeugt oder auch Luftströme verwendet ,werden, die, wie z. B.After it became known, the frequency of air pulses through acoustic To determine the effect of resonance, one later switched to periodic air currents to use elastic resonance bodies to excite visible vibrations, and as is well known, the air waves can either be generated artificially or also Air currents are used, which, such as. B.

to in der Nähe eines Speichenrades, von selbst entstehen.to arise by itself near a spoked wheel.

Derartige zufällig auftretende Luftströme werden indessen im allgemeinen kaum die nötige Intensität zu einer kräftigen Erregung der Resonanz körper haben.Such accidental air currents, however, are generally hardly the have the necessary intensity to vigorously excite the resonance bodies.

Nun ist aber in neuerer Zeit die Anzahl der Kraftimpulse z. B. bei den vielzylindrigen Automobilmotoren so gesteigert worden, daß diese Impulse hinsichtlich ihrer Frequenz bereits unmittelbar geeignet erscheinen, um einen Frequenzmesser anzuregen. Erfahrungsgemäß sind nämlich Resonanzkörper nur von einer gewissen Schwingungszahl aufwärts praktisch verwendbar, weil sie andernfalls durch jede zufällige kleine Erschütterung in beträchtliche Schwingungen geraten.But recently the number of force pulses z. B. in the multi-cylinder Automobile engines have been so increased that these pulses in terms of their frequency already appear immediately suitable to stimulate a frequency meter. According to experience namely, resonance bodies are only practical with a certain number of vibrations upwards usable because otherwise they will be sizeable by any random small shock Vibrations.

Gegenstand der vorliegenden Erfindung ist dementsprechend: Benutzung der Druckänderungen des gasförmigen Mediums im Arbeitszylinder oder auch in den Druck-, Saug- oder Auspuffleitungen der Kraftmaschine, deren Umdrehungszahl bestimmt werden soll, zur Betätigung eines Frequenzmessers, wobei die Benutzung auch eine indirekte sein kann, derart, daß die Druckänderungen vermittels trennender Membranen o. dgl. eine besondere zum Frequenzmesser führende Luftsäule in Schwingung setzen.The object of the present invention is accordingly: Use of the pressure changes of the gaseous medium in the working cylinder or in the pressure, suction or exhaust lines of the engine, whose The number of revolutions is to be determined for actuating a frequency meter, the Use can also be indirect, in such a way that the pressure changes mediate separating membranes or the like. A special air column leading to the frequency meter in Set vibration.

Auf der beiliegenden Zeichnung ist eine besondere Ausführungsform dargestellt. Wenn der Raum hinter der Membran m ζ. Β mit dem Zylinder einer arbeitenden Maschine verbunden wird, so füllt und entleert er sich in schnellem Wechsel, und die Membran schwingt taktmäßig mit. Diese Schwingungen werden durch einen Hebel h auf den bekannten Frahmschen Kamm/ übertragen.A particular embodiment is shown in the accompanying drawing. If the space behind the membrane m ζ. Β is connected to the cylinder of a working machine, it fills and empties in rapid succession, and the membrane oscillates with it in rhythm. These vibrations are transmitted to the well-known Frahm's comb / by a lever h.

Claims (1)

Patent-Anspruch :Patent claim: Verfahren zur Bestimmung der Umdrehungszahl von Dampf-, Gas- oder ähnlichen Maschinen mittels einer mitschwingenden, auf ein Resonanzinstrument wirkenden Gas- oder Dampfleitung, dadurch gekennzeichnet, daß die Gas- oder Dampfwellen von den periodischen Druckänderungen in den Arbeitszylindern oder den Saug-, Druck- oder Auspuffleitungen der Maschinen herrühren, deren Hub - oder Umlaufzahl bestimmt werden soll.Procedure for determining the number of revolutions of steam, gas or the like Machines by means of an oscillating, acting on a resonance instrument Gas or steam line, characterized in that the gas or steam waves from the periodic pressure changes originate in the working cylinders or the suction, pressure or exhaust lines of the machines, their stroke - or The number of revolutions is to be determined. Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.
DENDAT210708D Active DE210708C (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616681A (en) * 1948-07-15 1952-11-04 Sperry Corp Angular velocity responsive apparatus
US2875998A (en) * 1956-07-02 1959-03-03 Roland E Gunther Vehicular speed indicators
US2879467A (en) * 1959-03-24 Stern
US2914908A (en) * 1953-11-09 1959-12-01 Siemens Ag Shaft revolving apparatus, particularly for turbine generators
US3059480A (en) * 1960-06-16 1962-10-23 Henry W Carpenter Tachometer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2879467A (en) * 1959-03-24 Stern
US2616681A (en) * 1948-07-15 1952-11-04 Sperry Corp Angular velocity responsive apparatus
US2914908A (en) * 1953-11-09 1959-12-01 Siemens Ag Shaft revolving apparatus, particularly for turbine generators
US2875998A (en) * 1956-07-02 1959-03-03 Roland E Gunther Vehicular speed indicators
US3059480A (en) * 1960-06-16 1962-10-23 Henry W Carpenter Tachometer

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