DE411611C - Device for temporarily stopping electrically operated demonstration kinematographs - Google Patents

Device for temporarily stopping electrically operated demonstration kinematographs

Info

Publication number
DE411611C
DE411611C DEE30508D DEE0030508D DE411611C DE 411611 C DE411611 C DE 411611C DE E30508 D DEE30508 D DE E30508D DE E0030508 D DEE0030508 D DE E0030508D DE 411611 C DE411611 C DE 411611C
Authority
DE
Germany
Prior art keywords
electrically operated
temporarily stopping
kinematographs
stopping electrically
demonstration
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.)
Expired
Application number
DEE30508D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ernemann Werke AG
Original Assignee
Ernemann Werke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ernemann Werke AG filed Critical Ernemann Werke AG
Priority to DEE30508D priority Critical patent/DE411611C/en
Application granted granted Critical
Publication of DE411611C publication Critical patent/DE411611C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/32—Details specially adapted for motion-picture projection
    • G03B21/50—Control devices operated by the film strip during the run

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Description

DEUTSCHES REICHGERMAN EMPIRE

AUSGEGEBEN AM 6. APRIL 1925ISSUED ON APRIL 6, 1925

REICHSPATENTAMTREICH PATENT OFFICE

PATENTSCHRIFTPATENT LETTERING

- JVI411611 -KLASSE 57a GRUPPE - JVI411611 - CLASS 57a GROUP

(E 30508 VIl57C?)(E 30508 VIl 57 C?)

Firma Ernemaim-Werke A.-G. in Dresden. Vorrichtung zum zeitweisen Stillsetzen elektrisch betriebener Vorführungskinematographen. Ernemaim-Werke A.-G. in Dresden. Device for temporarily stopping electrically operated demonstration cinematographs.

Zusatz zum Patent 383396. Addendum to patent 383396.

Patentiert im Deutschen Reiche vom 22. März 1924 ab. Längste Dauer: 11. Februar 1939.Patented in the German Empire on March 22, 1924. Longest duration: February 11, 1939.

Im Patent 383396 ist eine Stillstandsvorrichtung für kineinatographische Apparate beschrieben, bei welcher der Motor sein Feld im Augenblick des Stillsetzens selbsttätig mittels eines Tliehkraftquecksilberschalters vom Netz abschaltet. In patent 383,396 a stoppage device for kineinatographische apparatus is described in which the motor stops its field at the moment of setting Still automatically by means of a Tliehkraftquecksilberschalters from the mains.

Die dabei angewendete Schaltung hat den Nachteil, daß bei Verwendung von Gleichstrom der Motor beim Stillsetzen übermäßig stark beansprucht wird, da infolge des geringen Feldwiderstandes bei gegebener Netzspannung eine übermäßig hohe Amperebe-The circuit used has the disadvantage that when using direct current the motor is excessively stressed when it is stopped because of the low Field resistance at a given mains voltage has an excessively high ampere load

lastung eintritt. Um diesen Übelstand zu beseitigen, wird bei Verwendung von Gleichstrom in den Motorkreis ein Zusatzwiderstand 12 (Abb. i) eingeschaltet, welcher den Strom auf eine zulässige Höhe abschwächt. Um den Apparat mit dieser Schaltung für Gleich- und Wechselstrom verwenden zu können, wird parallel zu dem Widerstand 12 ein Schalter 13 angebracht, welcher bei Wechselstrom den Widerstand 12 überbrückt, während er bei Gleichstrom den Widerstand 12 einschaltet dadurch, daß der Schalter 13 geöffnet ist. Bei Wechselstrom ist der Widerstand 12 nicht notwendig, da das Motorfeld 7 infolge seiner großen Selbstinduktion als Drossel wirkt, und somit der Strom von selbst auf seine zulässige Stärke begrenzt bleibt. Erfindungsgemäß wird auch, um Platz zu sparen und um die Apparatur" wesentlich zu verbilligen, der Zusatzwiderstand 12 im An- so lassergehäuse 10 mit untergebracht und die Zuleitung zu besonderen Klemmen 14, 15 abgeführt, wie in Abb. 2 veranschaulicht.load occurs. In order to remedy this drawback, direct current is used In the motor circuit an additional resistor 12 (Fig. i) switched on, which the Current attenuates to a permissible level. To use the apparatus with this circuit for To be able to use direct and alternating current, a parallel to the resistor 12 becomes Switch 13 attached, which bridges the resistor 12 during alternating current with direct current it switches on the resistor 12 by the fact that the switch 13 is open. With alternating current, the resistor 12 is not necessary because the motor field 7 due to its large self-induction acts as a choke, and thus the current acts by itself remains limited to its permissible strength. According to the invention is also to space save and in order to make the apparatus "substantially cheaper, the additional resistor 12 in the same way lasser housing 10 is also housed and the supply line is routed to special terminals 14, 15, as illustrated in Fig. 2.

Claims (2)

Patent-Ansprüche:Patent Claims: 1. Vorrichtung zum zeitweisen Stillsetzen elektrisch betriebener Vorführungskinematographen nach Patent 383396, dadurch gekennzeichnet, daß für Gleichstrombetrieb in Reihe mit dem Feld ein Zusatzwiderstand liegt, welcher bei Wechselstrom durch einen zu ihm parallel liegenden Schalter kurzgeschlossen wird.1. Device for temporarily stopping electrically operated demonstration cinematographs according to patent 383396, characterized in that there is an additional resistor in series with the field for direct current operation which is short-circuited in the case of alternating current by a switch lying parallel to it. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Zusatzwiderstand im Anlasser selbst untergebracht ist.2. Apparatus according to claim 1, characterized in that the additional resistor is housed in the starter itself. Abb.Fig. VWVV1 VWVV 1 1Θ1Θ Abb.Fig.
DEE30508D 1924-03-22 1924-03-22 Device for temporarily stopping electrically operated demonstration kinematographs Expired DE411611C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEE30508D DE411611C (en) 1924-03-22 1924-03-22 Device for temporarily stopping electrically operated demonstration kinematographs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE30508D DE411611C (en) 1924-03-22 1924-03-22 Device for temporarily stopping electrically operated demonstration kinematographs

Publications (1)

Publication Number Publication Date
DE411611C true DE411611C (en) 1925-04-06

Family

ID=7074555

Family Applications (1)

Application Number Title Priority Date Filing Date
DEE30508D Expired DE411611C (en) 1924-03-22 1924-03-22 Device for temporarily stopping electrically operated demonstration kinematographs

Country Status (1)

Country Link
DE (1) DE411611C (en)

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