US1300477A

US1300477A - Winding mechanism.

Info

Publication number: US1300477A
Application number: US23110918A
Authority: US
Inventors: John F O'connor
Original assignee: Individual
Current assignee: Individual
Priority date: 1918-04-27
Filing date: 1918-04-27
Publication date: 1919-04-15
Anticipated expiration: 1936-04-15

Description

UNITED sTATEs PATENT oEEIcE.

:roHN F. ocoNNon, or CHICAGO, ILLINOIS, AssIGNon To WILLIAM H. MINER, or cHAzY,

NEW YORK. y

WINLING MEcHANIsM.

Specification of Letters Patent.

Patented Apr. 175, 1919.

applicati@ mea Amira?, 191s. seria1No.a31,1o9.

To all whom t may concern:

Be it known that I, JOHN F. OCoNNoR, a citizen of the United, States, residin at Chicago, in the county of Cook and tate of Illinois, have invented a certain new and useful `Improvement in Winding Mechanism, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in winding mechanism.

above indicated having a single operating member adapted to effect a winding movement of one speed when said member is moved in one direction and a winding movement in the same direction at a different speed when said member is moved in the opposite direction.

In the-drawing forming a part of this specification, Figure 1 is an end elevational view of a hand brake for railway cars showing my improvements in connection therewith. Fig. 2 is a vertical, sectional view, taken substantially on the line 2 2 of Fig. 1. And Fig. 3 is a transverse, sectional view, taken substantially on the line of Fig. 2.

In said drawing, 10 denotes a wall of a car to which my improved winding mechanism, in the form of a hand brake, is adapted to be secured. As shown, the brake inl cludes a housing or casing A, a chain winding drum B, an operating lever C,I a ratchet wheel D, av second ratchet wheel E, a release wheel F, and pinion G, together with other minor features hereinafter specifically described. 'i

The casin A is of substantially hollow cylindrical orm having an outer Wall 11, intermediate wall'or partition 12, and inner wall flange 13 said casing having suitably extended lugs or ears 16 by which it is riveted or otherwise secured to the Wall of the car. The inner Wall flange 13 of the casing is inwardly offset so as t0 provide a suitable recess to accommodate a detachable inner wall plate 17, the latter having a central hub or boss 18 form-ing a suitable bearing for the inner end of the hollow chain winding drum B. The intermediatel partition 12 of the casinghas the central portion 19 thereof ofset so as to form a suitable bearing seat for a flange 20 formed on the drum B, and said oset portion 19 is also centrally perforated, as indicated at 21, to form a bearing for the outwardly extended sleeve 22 of the drum. The casing A is cut away at the bottom, as indicated at 23, so as to provide the necessary clearance for the brake chain, the upper link 24 of which is-shown in the drawing and is attached to` a liange 25l formed on the drum B.

Keyed t0 the sleeve 22 of the drum lso as to rotate in unison therewith is the ratchet wheel E, the latter having a peripheral lseries of ratchet teeth 26 and an inwardly 29 and 28 are both arranged in the same direction, that is, they permit the wheels D and E to rotate counter-clockwise but normally prevent rotation of said wheels in a clockwise direction. From this, it will be seen that when the wheel D is actuated in a counter-clockwise direction, it will necessarily rotate the wheel E and consequently the drum B therewith and when the pawl 28 is disengaged from theA wheel E, as hereinafter explained, the latter can rotate in a reverse or clockwise direction independently of the wheel D."

The operating lever C, as shown, consists of two

sections

31 and 32, the upper or supporting section 31 being extended downwardly and formed on its lower end into U-shape so as to form a suitable support for von the said pin 34.

a pin 34. The 'lever section 32, which is the handle. proper, is forked at its upper end, as indicated at 35, and straddles the U- shaped lower end of the section 31 and is pivoted to the latter by said pin 34. The pinion G is also mounted within the U- shaped lower end of the lever section 31 and By referring to Figs. 1 and 2, it will be seen that the

lever sections

31 and 32 are provided with engaging beveled faces 36 so designed that, as viewed in Fig. 1, the handle or lever section 32 can not be swung about the pin 34 to the right of a line passing through the pinI 34 and the axis of rotation of the drum B about which said lever, vas an entirety, is adapted to be oscillated as will be understood.

Pivotally mounted on the handle or lever section 32 is a spring-controlled pawl 37 which coperates with the pinion G, said pawl 37 being so arranged as to permit rotation of said pinion G in a clockwise direction about the pin 34 but preventing counterclockwise rotation thereof, as viewed in appears from Fig. 2. The'plate 39, on its inner face, carries a preferably integral pin v41 adapted to travel in a circular path having a 'radius greater than the radius of the ratchet wheel E but 'of less radius than the distance fromthe axis of the wheel E to the pivot of the pawl 28 so that, when said pin 41 is moved in a counter-clockwise direction, as viewed in Fig. 3, it will effect disengagement of the pawl 28 from the ratchet wheel E, regardless of the position of the ratchet wheel E and its pawl 28. To hold the parts in assembled position, the through bolt 42 is employed which extends from the boss or hub 18 to the outer end of the 'device and has a washer 43 and nut y44 placed thereon.

In order to 4hold the upper section 31 of I the lever against movement, for the purpose hereinafter described, I provide a latch 45 pivoted, as indicated at 46, to the casing A, said latch 45 being of hook-shape and adapted to engage over the outer arm of the U-shaped lower end of the lever section 31 but free of the lever section or handle 32.

The operation is as follows: To effect the winding or tightening of the chain while taking up the slack thereof, the operator throws the latch 45 out of engagement with the operating lever and then proceeds to oscillate the lever about the axis of rotation of the drum B. As the lever is swung to the left, as viewed in-Fig. 1, it is evident that the wheel-D will be held stationary by the pawl 29 and consequently the pinion G will rotate freely in a clockwise direction. As the lever is then swung down, the tendency is for the pinion G to rotate in a counterclockwise direction but lon account of the pawl 37,' this is prevented. Consequently, the pinion G and combined ratchet and gear wheel D will be locked and the latter rotated in a counter-clockwise direction, which is permitted by the arrangement of the pawl 29. As the wheel is thus rotated, it is evident that thetratchet wheel E will be rotated in the same direction andy consequently the drum B, which is keyed to the wheel E, will also be rotated. In other words, the drum B will be rotated in unisonv with the operating lever C whenever the latter is swung as an entirety in a counter-clockwise direction. This movement may be continued by the operator until the slack in the chain is taken l up and then', in order to effect the final winding or tightening movement of the chain and at an increased leverage ratio, the operator throws the latch 45 into engagement with the upper section 31 of the operating lever. Then, as the handle 32 is oscillated about the pin 34, it is evident that oscillation of said handle 32 in a clockwise direction will cause the pinion G to rotate in a similar direction, and this, rotation of the pinion G will be transferred to the wheel D and the rotation of the drum continued as before but yat an obviously slower rate and with more effective leverage. a

The drum is, of course, prevented from accidental backward rotation or release by the pawl 29-acting through the interposed wheel D, pawl 28 and wheel E. When it is desired to release the brake chain, the operator grasps the release hand wheel F and gives it a slight turn sufficient to disengage the pawl 28 from the wheel E, whereupon the latter in unison with the drum B, is permitted a free rotation in a clockwise or release direction. In this connection, it will be noted that in releasing the brake chain, all danger of suddenly swinging the operating lever is avoided since Ato eii'ect release,I a complete disengagement of the operative elements between the operating 4lever and the wheel E must be accomplished. This is of practical importance in the use of railway hand brakes since frequent injuries to the brakemen are occasioned by the operating levers of. the brakes striking the brakemen when the chains are released.

Although I have herein shown and described what I now consider the preferred manner of carrying out the invention, the same is merely illustrative and I contemplate all changes and modifications coming within the scope of the claims appended t hereto.

I claim:

l. In a mechanism of the character described, the combination with a rotatable element, of an operating member having movement in opposite directions, means interposed between said member and said element for rotating the latter at one speed when said member moves in one direction, and means for changing the operative relation of said first named means to cause rotation of said element inthe same direction but at a 4diilerent speed when said member is moved in the reverse direction.

Q. In a mechanism of the character described, the combination with a 'rotatable element,`of an operating lever adapted for oscillation as an entirety about the same axis as said element rotates, pinion pawl and ratchet means interposed between said lever and element for effecting step by step rotation of the latter upon oscillation of the lever about said axis, and means for effecting oscillation of a port-ion of said lever about a different axis, said first named means, v

rotating said element step by step, when said lever is oscillated about Said dierent axis but with an increased leverage ratio.

3. In a mechanism of the character described, the combination with a rotatable element, of a manually operable member, pawl and ratchet mechanism including gearing interposed between said member and element for effecting a rotative movement of said element corresponding to movement of said member, and means for changingthe action of said gearing to rotate said element at a different speed upon actuation of said member,

4. In a mechanism of the-character described, the combination with a rotatable element adapted to tighten a chain or the like, of an operating lever oscillatable about one axis as an entirety, a section of said lever being independently oscillatable about a different axis, and means interposed between saidsectio` and said element arranged to effect rotative, movement of Said element at one speed when said lever is oscillated as an entirety and at a different speed when said section only is oscillated.

5. In a mechanism of the character described, the combination with a rotatable element adapted to tighten a chain or the like, of an operating lever oscillatable about one axis as an entirety, a section' of said .lever being independently oscillatable about a different axis, and means interposed between said section and said element arranged to effect rotative movement of said element at one speed when said lever is oscillated as an entirety and at a different speed when said section only is. oscillated,

said means including a pawl and train of ears.

g 6. In a mechanism of the character described, the combination with a rotatable chain winding drum, of an operating lever oscillatablekabout the same axis as the Iaxis of rotation of said drum, said lever comprising two sections pivotally connected, means coperable with said lever as anv entirety for effecting rotative movement of said drum when said lever is moved in one direction, `means for holding one section of said lever in fixed position and permitting independent movement ofthe other section, and means interposed between the last named section and the drum for effecting rotation of the latter upon oscillation of the lsaid section.

7. In a hand brake for railway cars, the `combination with a housing having a chain winding drum rotatably mounted therein, of a ratchet wheel rotatable in unison with the drum, a second ratchet wheel carrying a pawl coperable with the first named ratchet wheel, means for disengaging said p'awl and first named ratchet wheel, a pawl coperable with the second named ratchet wheel, and operatin means for the second named ratchet wheel' v 8. In a hand brake for railway cars, the combination with a housing having a chain winding drum rotatably mounted therein, of

.a combined ratchet and gear wheel rotatable about the same axis as said drum, means interposed between said wheel and drum to effect rotation of the latter in unison with said wheel, a sectional lever, a pinion carried by said lever and coperable with said wheel, a pawl coperable with said pinion,

and means for locking one section of-said lever in fixed position and permitting independent movement of the other section thereof.

9. In a hand brake for railway cars, the combination with a housing having a chain winding drum rotatably mounted therein, of a combined ratchet and gear wheel rotatable about the same axis as said drum, means interposed between said wheel and drum to effect rotationl of the latter in unison with said wheel, a sectional lever, a pinion carried by said lever and coperable with said wheel, a pawl coperable with said pinion, and means for locking one section ofsaid lever in fixed position and permitting independent movement of the other section thereof, and means for rendering inoperative the first named means. i

In witness that I claim-the foregoing I vhave hereunto subscribed my name this 10th day of April, 1918. p

JOHN F. OCONNOR.