US703434A - Engine-indicator. - Google Patents

Engine-indicator. Download PDF

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Publication number
US703434A
US703434A US6744701A US1901067447A US703434A US 703434 A US703434 A US 703434A US 6744701 A US6744701 A US 6744701A US 1901067447 A US1901067447 A US 1901067447A US 703434 A US703434 A US 703434A
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Prior art keywords
drum
indicator
engine
spring
grooved disk
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US6744701A
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Hugo Albert Carl August Wilhelm Maihak
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/02—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid mechanically indicating or recording and involving loaded or return springs

Definitions

  • the stopping means hitherto used in connection with indicator-drums with the indicator-cord in stretched position necessitates the arrangement of special devices for stretching the cord (double spring-casings or the like) which oscillate together with the moving drum. Owing to this arrangement, however, the weight of the oscillating mass of the drum is increased, which weight, however, should be kept as low as possible, and by this increase the precision of the diagram is impaired.
  • the arresting action of the drum is simplified, so that the weight of the drum or of the oscillating mass is not increased, but is, on. the contrary, diminished, while at the same time the device can be used for engines with very high number of revolutions.
  • This decrease of weight is effected by the arrangement of a single spring for thepaper-drum when in motion as well as when arrested.
  • This device can be made in various modifications, one of which is represented in the accompanyingdrawings, in which Figure 1 is a vertical section of the drum in operative position. Fig. 2 is the same in arrested position.
  • the latter is provided with a button h and engages the threads f of the central shaft a, a screw 7c being provided to limit the extent of movement of the screw-threaded sleeve g.
  • a spring-pin Z moves in a box or recess t', said pin engaging with an opening at in the cone seating on the lower part of the drum, while the downward-projecting portion of the box or pin casing 'Z in striking against a stud m serves for limiting the reciprocating movement of the grooved disk.
  • Fig. 1 shows the drum t coupled with the grooved disk 0, in which case the drum moves, together with said grooved disk. If it is desired to stop the drum for the purpose of attaching a fresh indicator-paper, the screw is rotated to the left by means of the button h, thereby releasing the drum from the cone d, as well as from the spring-pin Z, Fig.
  • the screw 9 is turned to the right and therefore presses the drum downward upon the cone (Z.
  • the reciprocating grooved disk 0 brings the pin Z opposite to the opening an, thus causing it to engage with the latter and securing the drum in the corresponding position upon the grooved disk.
  • the spring-pin Z could also be arranged upon the drumt and engage with the grooved disk. In this case the lattermust be provided with a suitable abutment for limiting the extent of movement.
  • I claim 1 In an engine-indicator, the combination of a spring-influenced pulley having a conical hub, with a vertically-movable paper-receiving drum having a coned seat adapted to engage said hub, substantially as specified.

Description

Lil
UNITED STATES PATENT OFFICE.
HUGO ALBERT CARL AUGUST l/VILHELM MAIHAK, OF HAMBURG, GERMANY.
ENGINE-INDICATOR.
SPECIFICATION forming part of Letters Patent No. 703,434, dated July 1, 1902.
Application filed July 8,1901- Serial No. 67AM. (No model.)
To ctZZ whom, it may concern:
Be it known that I, HUGO ALBERT CARL AUGUST WILHELM MAIHAK, a citizen of the German Empire, and a resident of Hamburg, Germany, have invented certain new and useful Improvements in or Relating to Engine- Indicators, of which the following is a specification.
The stopping means hitherto used in connection with indicator-drums with the indicator-cord in stretched position necessitates the arrangement of special devices for stretching the cord (double spring-casings or the like) which oscillate together with the moving drum. Owing to this arrangement, however, the weight of the oscillating mass of the drum is increased, which weight, however, should be kept as low as possible, and by this increase the precision of the diagram is impaired.
In the indicator device which forms the object of the present invention the arresting action of the drum is simplified, so that the weight of the drum or of the oscillating mass is not increased, but is, on. the contrary, diminished, while at the same time the device can be used for engines with very high number of revolutions. This decrease of weight is effected by the arrangement of a single spring for thepaper-drum when in motion as well as when arrested. This device can be made in various modifications, one of which is represented in the accompanyingdrawings, in which Figure 1 is a vertical section of the drum in operative position. Fig. 2 is the same in arrested position.
A grooved disk 0, rotatively mounted upon the fixed druni-shaftaand wound up bymeans of the coiled spring Z), carries a central cone d, about which is arranged a cone-seat u on the lower part to of the paper-receiving drum Z. The drum 75, together with the upper portion, which for the purpose of a better guidance can beprovided with a boss o, is loosely and rotatively mounted upon an adjusting screw-threaded sleeve 9. The latter is provided with a button h and engages the threads f of the central shaft a, a screw 7c being provided to limit the extent of movement of the screw-threaded sleeve g.
In the grooved disk 0 a spring-pin Zmoves in a box or recess t', said pin engaging with an opening at in the cone seating on the lower part of the drum, while the downward-projecting portion of the box or pin casing 'Z in striking against a stud m serves for limiting the reciprocating movement of the grooved disk. Fig. 1 shows the drum t coupled with the grooved disk 0, in which case the drum moves, together with said grooved disk. If it is desired to stop the drum for the purpose of attaching a fresh indicator-paper, the screw is rotated to the left by means of the button h, thereby releasing the drum from the cone d, as well as from the spring-pin Z, Fig. 2, and stopping its rotation, while the grooved disk continues to oscillate and to stretch the indicator-cord. When it is required to again couple the drum with the grooved disk 0, the screw 9 is turned to the right and therefore presses the drum downward upon the cone (Z. The reciprocating grooved disk 0 brings the pin Z opposite to the opening an, thus causing it to engage with the latter and securing the drum in the corresponding position upon the grooved disk. The spring-pin Z could also be arranged upon the drumt and engage with the grooved disk. In this case the lattermust be provided with a suitable abutment for limiting the extent of movement.
I claim 1. In an engine-indicator, the combination of a spring-influenced pulley having a conical hub, with a vertically-movable paper-receiving drum having a coned seat adapted to engage said hub, substantially as specified.
2. In an engine-indicator, the combination of a spring-influenced pulley having a conical hub, with a paper-receiving drum having a coned seat adapted to engage said hub, a spring-pin coupling between pulley and d rum, a vertically-movable adjusting-nut supporting the drum, and a fixed bolt engaged by the nut, substantially as specified.
Signed by me at Hamburg this 15th day of June, 1901.
HUGO ALBERT CARL 7 AUGUST WILHELM MAIHAK. Witnesses:
A. GoPPs, E. H. L. MUMMENHOFF.
US6744701A 1901-07-08 1901-07-08 Engine-indicator. Expired - Lifetime US703434A (en)

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US6744701A US703434A (en) 1901-07-08 1901-07-08 Engine-indicator.

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US6744701A US703434A (en) 1901-07-08 1901-07-08 Engine-indicator.

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