US2903320A - Recording decelerometer - Google Patents

Recording decelerometer Download PDF

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Publication number
US2903320A
US2903320A US611451A US61145156A US2903320A US 2903320 A US2903320 A US 2903320A US 611451 A US611451 A US 611451A US 61145156 A US61145156 A US 61145156A US 2903320 A US2903320 A US 2903320A
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US
United States
Prior art keywords
arm
recording
vehicle
decelerometer
deceleration
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 - Lifetime
Application number
US611451A
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English (en)
Inventor
Changy Gilbert De
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Individual
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Individual
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Filing date
Publication date
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Publication of US2903320A publication Critical patent/US2903320A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/12—Recording devices
    • G01P1/127—Recording devices for acceleration values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/03—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses by using non-electrical means
    • G01P15/032—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses by using non-electrical means by measuring the displacement of a movable inertial mass

Definitions

  • This invention relates to the apparatus of the type designed to record on a sheet of paper the different decelerations to which a vehicle carrying the recording apparatus is subjected, and wherein the aforesaid decelerations are recorded in the form of separate lines having a common origin but lengths varying as a function of the deceleration value.
  • Figure l is a plan view from above of the apparatus.
  • FIG. 2 is a similar View showing the apparatus without its cover.
  • Figure 3 is a cross-sectional view of the same apparatus
  • the inertia block 21 is mounted on one end of anarm 22 pivoted at its other end about a pivot 23.
  • 'A' strip 24 extends substantially at right angles from this arm 22 and carries at its free end a pen or stylus 45.
  • a ratchet wheel 25 is fixed rigid with the lower portion of a revolvable shaft 26.
  • a resilient spring 27 prevents the ratchet wheel from rotating in a clockwise direction and the rotation of this ratchet wheel in a counter-clockwise direction is controlled by a pawl 28 pivotally mounted at 29 on the aforesaid arm 22 and normally urged by a light return spring 30 into engagement with the teeth of the ratchet wheel 25.
  • a cam-forming member 44 is adapted to be engaged by the operative end of the pawl 28 to prevent it from driving the ratchet wheel 25 by more than one tooth at a time, whereby a step-by-step drive is applied to this ratchet wheel.
  • an adjustable stop 35 is adapted to be engaged by a projection 34 formed on the pawl 28 to lock the latter against motion upon completion of each driving pulse.
  • the stylus 45 extends upwards and is adapted, due to the inherent resiliency of the strip 24, to exert a light elastic pressure on the inner or lower face of a disc 39.
  • the disc may advantageously consist of a waxed sheet of paper protected by adequate means and rotatably rigid with the ratchet wheel 25 and shaft 26; to this end, the disc 39 is clamped between a shoulder or collar portion 41 rigid with the shaft 26 and a pane of glass 40, the clamping action being provided by a nut 42 screwed on the registering threaded end portion of shaft 26.
  • the compression spring 31 is so adjusted that the angular movement of the inertia block 21 about its axis 23 ice as well as that of the stylus 24 for the maximum deceleration value contemplated are below a predetermined maximum corresponding for example to the penultimate concentric scale or reference line printed on the disc 39.
  • the recording disc 39 carries preferably concentric circular scale lines corresponding to the different amplitudes of the angular displacements of the stylus as a function of the decelerations to which the apparatus is subjected.
  • the complete mechanism may be mounted on a base 47 protected by a cover 48 adapted to be secured by means of four bolts 49; this cover has an upper face 50 which, when the cover is closed, is level with the shoulder or collar 41 and comprises a central aperture just sufficient to allow this shoulder or collar 41 therethrough.
  • the cover 48 further carries another, outer cover, hingedly mounted on a pin 51 and constituting a bezel or like circular frame 52 carrying a glass plate 53.
  • the disc 39 and the lines traced thereon by the stylus 45 are visible through the glass plates 40 and 53. To replace the recorded disc 39 with a fresh one it is sufficient. to lift the outer or circular frame 52 about its hinge pin 51 and to release the central nut 42 to free the glass plate '40; it is not necessary to remove the cover 48 proper.
  • the complete mechanism of the decelerograph is concealed and protectedby the cover 48 and the only apertures formed in this cover are the aforesaid central aperture surrounding the collar 41 and a curvilinear slot 54 concentric to the pivot pin 23 for the passage of the stylus 45.
  • An arrow 55 directed at right angles to the arm 22 carrying the inertia block 21 when the mechanism is in its inoperative condition may advantageously be provided at the top of the apparatus to indicate that the latter must be so placed on the vehicle to be tested that the arrow indicates the direction of motion of the vehicle.
  • the apparatus described hereinabove and shown in the attached drawings may be utilized for testing both horizontal and vertical decelerations, as well as shocks in different directions; the position of the apparatus employed is subordinate to the desired results.
  • a recording decelerometer for measuring and recording deceleration of a vehicle
  • a pivotally mounted arm an inertia mass mounted on said arm for effecting pivotal movement of the arm away from a rest position in response to deceleration forces of said vehicle when the decelerometer is disposed in the vehicle in a given position relative to the forward movement of the vehicle to allow the mass to sense and respond to said forces, a limit stop against which said arm bears when in said rest position, a damping spring disposed bearing on said first arm for compression thereby when the arm leaves the rest position, a rotatable shaft, a record disc carried by said shaft for rotation thereof, a stylus constantly in writing engagement with said record disc, means operatively connecting the stylus to said arm for angular displacement thereof in the same direction and extent of angular displacement of said arm, drive means perated by said arm to rotate said shaft a given angular extent for each displacement of said arm away from said rest position in response to deceleration forces above a given value thereby
  • a recording decelerometer for measuring and recording deceleration of a vehicle
  • a pivotally mounted first arm an inertia mass mounted on said arm for effecting pivotal movement of the arm away from a rest position in response to deceleration forces ofsaid vehicle when the decelerometer is disposed in the vehicle in a given position relative to the forward movement of the vehicle to allow the mass to sense and respond to said forces, a limit stop against which said arm bears when in said rest position, a damping spring disposed bearing on said first arm for compression thereby when the arm leaves the rest position, a rotatable shaft, a record disc carried by said shaft for rotation thereof, a stylus constantly in writing engagement with said record disc, means comprising a second arm fixed substantially nortrial to the first arm operatively connecting the stylus to said first arm for angular displacement thereof in the same direction and extent of angular displacement of said first arm, drive means operated by said first arm to rotate said shaft a given angular extent for each displacement of said first arm
  • a recording decelerometer for measuring and recording deceleration of a vehicle
  • a pivotally mounted arm an inertia mass mounted on said arm for effecting pivotal movement of the arm away from a rest position in response to deceleration forces of said vehicle when the decelerometer is disposed in the vehicle in a given position relative to the forward movement of the vehicle to allow the mass to sense and respond to said forces, a limit stop against which said arm bears when in said rest position, a damping spring disposed hearing on said arm for compression thereby when the arm leaves the rest position
  • a rotatable shaft a record disc carried by said shaft for rotation thereof, a stylus constantly in writing engagement with said record disc, means operatively connecting the stylus to said arm for angular displacement thereof in the same direction and extent of angular displacement of said arm, drive means operated by said arm to rotate said shaft a given angular extent for each displacement of said arm away from said rest position in response to deceleration forces above a given value thereby to position

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
  • Toys (AREA)
  • Recording Measured Values (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
US611451A 1955-05-20 1956-09-24 Recording decelerometer Expired - Lifetime US2903320A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1126627T 1955-05-20
FR1013906X 1955-09-23

Publications (1)

Publication Number Publication Date
US2903320A true US2903320A (en) 1959-09-08

Family

ID=63721179

Family Applications (1)

Application Number Title Priority Date Filing Date
US611451A Expired - Lifetime US2903320A (en) 1955-05-20 1956-09-24 Recording decelerometer

Country Status (6)

Country Link
US (1) US2903320A (fr)
BE (1) BE551238A (fr)
CH (1) CH340651A (fr)
DE (1) DE1013906B (fr)
FR (2) FR1126627A (fr)
GB (1) GB799650A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183512A (en) * 1963-06-17 1965-05-11 Alfred B Castle Mechanical graphic recording omnidirectional accelerometer
US4027535A (en) * 1976-02-02 1977-06-07 Erik Swanson Manual thrust gauge
US4460902A (en) * 1983-02-01 1984-07-17 Beckman Jesse W Vehicle drive recorder

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US164031A (en) * 1875-06-01 Improvement in electric signaling and recording apparatus
US671952A (en) * 1900-02-23 1901-04-16 Charles R Daellenbach Explosive-engine governor.
US868055A (en) * 1905-12-01 1907-10-15 Crosby Steam Gage And Valve Company Recording-counter.
US877198A (en) * 1906-12-31 1908-01-21 American Steam Gauge & Valve Mfg Company Automatic recording-gage.
US1010725A (en) * 1906-01-24 1911-12-05 Conrad Hubert Vehicle movement-detector.
US1104250A (en) * 1913-04-25 1914-07-21 Pyle Nat Electric Headlight Co Recorder.
US1139247A (en) * 1907-06-27 1915-05-11 Automatic Time Stamp Company Time-stamp.
US1992134A (en) * 1935-02-19 Apparatus fob recording vibrations
GB557920A (en) * 1942-06-08 1943-12-10 Alan Muntz & Co Ltd Improvements in or relating to aircraft instruments
GB576596A (en) * 1944-01-15 1946-04-11 Fidelity Engineering Company L Improvements in or relating to recording instruments for making a record of a variable

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US164031A (en) * 1875-06-01 Improvement in electric signaling and recording apparatus
US1992134A (en) * 1935-02-19 Apparatus fob recording vibrations
US671952A (en) * 1900-02-23 1901-04-16 Charles R Daellenbach Explosive-engine governor.
US868055A (en) * 1905-12-01 1907-10-15 Crosby Steam Gage And Valve Company Recording-counter.
US1010725A (en) * 1906-01-24 1911-12-05 Conrad Hubert Vehicle movement-detector.
US877198A (en) * 1906-12-31 1908-01-21 American Steam Gauge & Valve Mfg Company Automatic recording-gage.
US1139247A (en) * 1907-06-27 1915-05-11 Automatic Time Stamp Company Time-stamp.
US1104250A (en) * 1913-04-25 1914-07-21 Pyle Nat Electric Headlight Co Recorder.
GB557920A (en) * 1942-06-08 1943-12-10 Alan Muntz & Co Ltd Improvements in or relating to aircraft instruments
GB576596A (en) * 1944-01-15 1946-04-11 Fidelity Engineering Company L Improvements in or relating to recording instruments for making a record of a variable

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183512A (en) * 1963-06-17 1965-05-11 Alfred B Castle Mechanical graphic recording omnidirectional accelerometer
US4027535A (en) * 1976-02-02 1977-06-07 Erik Swanson Manual thrust gauge
US4460902A (en) * 1983-02-01 1984-07-17 Beckman Jesse W Vehicle drive recorder

Also Published As

Publication number Publication date
FR1126627A (fr) 1956-11-27
GB799650A (en) 1958-08-13
DE1013906B (de) 1957-08-14
CH340651A (fr) 1959-08-31
FR68033E (fr) 1958-03-27
BE551238A (fr) 1900-01-01

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