US614470A - Pawl-and-ratchet device - Google Patents

Pawl-and-ratchet device Download PDF

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Publication number
US614470A
US614470A US614470DA US614470A US 614470 A US614470 A US 614470A US 614470D A US614470D A US 614470DA US 614470 A US614470 A US 614470A
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Prior art keywords
pawl
ratchet
handle
hold
teeth
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Expired - Lifetime
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H13/00—Actuating rail vehicle brakes
    • B61H13/02—Hand or other personal actuation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/15—Intermittent grip type mechanical movement
    • Y10T74/1558—Grip units and features
    • Y10T74/156—Compound movement handle

Definitions

  • FIG. 1 is a side elevation, partly in section, of the best form of my device.
  • Figs. 2, 2, and 2b are sections on line 2 2 of Fig. 1 with the ratchet in the same positionA in all three, but with the pawl-carrier in different positions.
  • Figs. 3 and 4 illustrate a modification, Fig. 3 being a section on line 3 3 of Fig. 4 and Fig. 4 a section on line 4 4 of Fig. 3.
  • My invention is the combination of a ratchet, a pawl which slides by gravity into engagement with the ratchet, and automatic means which compel the pawl to take a full hold on one of the ratchet-teeth when the ratchet is moved by power applied through the pawl, or vice versa.
  • A isthe pawl-carrier, a the pawl, and B the ratchet.
  • the pawl-carrier A is formed with a socket to receive the ratchet B and is also formed with a chamber atl one side to receive the pawl d.
  • the bottom or floor d of the pawl-chamber is inclined, as plainly shown in Fig. 1, and the lower end of the pawl is also inclined, and the pawl therefore tends constantly to move todss ward the anis of the ratchet when the spindle b of ratchet B is upright, as shown in Fig. 1.
  • I provide meansV to force the engaging end of the pawl toward the aXis of the ratchet after the pawl has obtained a partial hold on one of the ratchet-teeth by sliding more or less down the inclined floor a.
  • the pawl swings in the pawlchamber, so that when the handle is moved in one direction the cam action of the ratchetteeth compels the pawl to swing to clear the ratchet-teeth; but when the handle is moved in the other direction the pawl will partially engage one of the ratchet-teeth by sliding Y more or less down floor a and will then be swung back in its chamber and the engaging end of the pawl will be forced into the fullhold position shown in Fig. 2.
  • thepawl-carrier A is hinged to handle A and the rear end of the pawlchamber is open, the handle A forming a movable abutment a2 for the rear end of the pawl, so that when the handle is moved in one direction the cam action of the ratchetteeth will move the pawl away from the axis of the ratchet; but on the reverse movement of the handle the pawl will iirst take a partial hold on one of the ratchet-teeth by sliding more or less down the inclined iioor a toward the axis of the ratchet, and that partial hold of the pawl in one of the ratchet-teeth will compel the outer part of the handle to move on its hinge, and the abutment a2 will force the pawl into the position shown in Fig. 3 with a full hold of one of the ratchet-teeth.
  • my invention is the combination of a pawl which obtains a slight hold by gravity with means which automatically compel the pawl to take a full hold, and while the result is obtained in the form shown in Figs. 1 to 2b, inclusive, by means which compel the pawl to swing toward the axis of the ratchet when the handle is moved to move the ratchet in the form shown in Figs.
  • both forms embody my invention which is the combination of a gravity-pawl (which is sure to take more or less of a hold upon one of the ratchet-teeth, but is not /sure to take a full hold) with automatic ,means to compel that pawl to take a full hold, the new result being that a single gravity pawl is made to take a full hold, and failure to take a full hold is a mechanical impossibility.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Description

Ni'rnn TATES GEORGE HENRY HASEY, OF TAUNTON, MASSACHUSETTS.
PAWL-AN D'- RATCH ET DEVICE.
SPECIFICATION forming part of Letters Patent No. 614,470, dated November 22, 1898.
Application led August 16 1898. Serial No. 688 ,677. (N0 modem Y To @ZZ whom t may concern:
Be it known that I, GEORGE HENRY I-IAsEY, of Taunton, in the county of Bristol and State of Massachusetts, have invented a new and useful Pawl-and-RatchetDevice, of which the following is a speciiication, reference being had to the accompanying drawings, in which- Figure 1 is a side elevation, partly in section, of the best form of my device. Figs. 2, 2, and 2b are sections on line 2 2 of Fig. 1 with the ratchet in the same positionA in all three, but with the pawl-carrier in different positions. Figs. 3 and 4 illustrate a modification, Fig. 3 being a section on line 3 3 of Fig. 4 and Fig. 4 a section on line 4 4 of Fig. 3.
My invention is the combination of a ratchet, a pawl which slides by gravity into engagement with the ratchet, and automatic means which compel the pawl to take a full hold on one of the ratchet-teeth when the ratchet is moved by power applied through the pawl, or vice versa.
In the drawings, A isthe pawl-carrier, a the pawl, and B the ratchet. The pawl-carrier A is formed with a socket to receive the ratchet B and is also formed with a chamber atl one side to receive the pawl d. The bottom or floor d of the pawl-chamber is inclined, as plainly shown in Fig. 1, and the lower end of the pawl is also inclined, and the pawl therefore tends constantly to move todss ward the anis of the ratchet when the spindle b of ratchet B is upright, as shown in Fig. 1.
In order that the pawl will be sure to obtain a full hold on onel of the ratchet-teeth when the handle is moved in a direction to cause the pawl to carry the ratchet with it, I provide meansV to force the engaging end of the pawl toward the aXis of the ratchet after the pawl has obtained a partial hold on one of the ratchet-teeth by sliding more or less down the inclined floor a.
In the form of my device shown in Figs. l to 2b, inclusive, the pawl swings in the pawlchamber, so that when the handle is moved in one direction the cam action of the ratchetteeth compels the pawl to swing to clear the ratchet-teeth; but when the handle is moved in the other direction the pawl will partially engage one of the ratchet-teeth by sliding Y more or less down floor a and will then be swung back in its chamber and the engaging end of the pawl will be forced into the fullhold position shown in Fig. 2.
In Figs. 3 and 4 thepawl-carrier A is hinged to handle A and the rear end of the pawlchamber is open, the handle A forming a movable abutment a2 for the rear end of the pawl, so that when the handle is moved in one direction the cam action of the ratchetteeth will move the pawl away from the axis of the ratchet; but on the reverse movement of the handle the pawl will iirst take a partial hold on one of the ratchet-teeth by sliding more or less down the inclined iioor a toward the axis of the ratchet, and that partial hold of the pawl in one of the ratchet-teeth will compel the outer part of the handle to move on its hinge, and the abutment a2 will force the pawl into the position shown in Fig. 3 with a full hold of one of the ratchet-teeth.
It will now be clear that my invention is the combination of a pawl which obtains a slight hold by gravity with means which automatically compel the pawl to take a full hold, and while the result is obtained in the form shown in Figs. 1 to 2b, inclusive, by means which compel the pawl to swing toward the axis of the ratchet when the handle is moved to move the ratchet in the form shown in Figs. 3 and 4 by means which compel the pawl to move endwise when the handle is moved to move the ratchet, yet it is obvious that both forms embody my invention, which is the combination of a gravity-pawl (which is sure to take more or less of a hold upon one of the ratchet-teeth, but is not /sure to take a full hold) with automatic ,means to compel that pawl to take a full hold, the new result being that a single gravity pawl is made to take a full hold, and failure to take a full hold is a mechanical impossibility.
I do not claim hinging the carrier to the handle nor the movable abutment a2 and have illustrated that movable abutment as one eX- ample of means for automatically compelling the pawl to take a full hold, which may be used as a substitute for the means vshown 1n Figs. 1, 2, 2, and 2b, nor do I claim a pawl IOO ' which compel the engaging end of the pawl to move toward the axis of the ratchet When the paWl and ratchet are moved as one. 1o
GEORGE HENRY HASEY.
sliding on an inclined plane, as I am aware of Patent No. 558,371 to P. S. Emery, dated April 14, 1896.
What I do claim as my invention is- 5 The combination of a ratchet; a paWl with Witnesses:
an inclined lower end; a pawl-ehamber with J. E. MAYNADIER,
an inclined bottom; and automatic means SOLON R. WRIGHT.
US614470D Pawl-and-ratchet device Expired - Lifetime US614470A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020077902A1 (en) * 2000-06-30 2002-06-20 Dwight Marcus Method and apparatus for verifying review and comprehension of information

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020077902A1 (en) * 2000-06-30 2002-06-20 Dwight Marcus Method and apparatus for verifying review and comprehension of information

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