US728095A - Crane. - Google Patents

Description

-Patented. May 12, 1903.

@FFICE.

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UNITED STATES i PATENT LEONARD s. FLECKENSTEIN; on EAsToN, MARYLAND.

CRANE. SPECIFICATION forming art of Letters Patent Nd. 728,095; datedMay 12, 1903. Application filed Qbtober 21, 1 62. Serial 110.128.10 1. (No man] 2 T0 at whom it incty concern:

Be it known that I, LEONARD S. FLEOKEN- STEIN, a citizen of the United States, anda resident of Easton, in the county of Talbot and State of Maryland, have invented certain new and useful Improvements in Cranes, of which the following is a specification.

My invention is an improvement in that class of cranes whose principal parts are a vertically-rotatable post, a horizontal arm or jib permanently attached to the same, and Winch or drum for winding up the hoisting chain.

My invention includes certain features. hereinafter described, and illustrated in theaccompanying drawings, wherebyI attain ad. vantages in respect to simplicity of construction and the application of power.--

In the drawings, Figure 1 is mainly a sideelevation of my improved crane. Fig. 1 isa view of a lever detached. Fig. 2 is an-en-" larged horizontal sectiouon the line 2 2 of- Fig. 1. Fig. 3 is mainly an enlargedsection of the main portion of the apparatus. Fig. 4 Y is a cross-section of the vertical-post on. the line 4 1 of Fig. 1. Fig.5 isadetail view illustrating the connection between a'shift' ing bar and pinion. Fig. 6 is a side view further illustrating the manipulation or adjustmeut of the pinion-shifting bar. Fig. 7 is a plan view of one of the'beariugs for the drivlug-shafts.

The vertical post 1 has eccentric pivots or bearings. The jib or horizontal boom 2-is made of two parallel parts or bars 2, as indi-1 cated in Fig; 2, and a diagonal brace 3 is at tached to and connects the post and boom", as usual in this class of cranes.

The hoisting-chain 4 runs over a pulley on the outer end of the boom and winds upon a winch or drum 5, which is keyed upon a vertical shaft 6, having its bearings-in transverse bars 7, which are attached to the upper and lower sidesyrespectively, of the boom 2. The shaft 6 is provided with a feather or spline 8, and a collar 9 is applied to the shaft just above the feather 8 and secured by a clamp-screw 10. A combined spur and friction wheel 11 (see Fig. 3) is mounted loose upon the shaft 6 and provided with a hub 11, by which it is supported on the aforesaid collar 9. It is apparent that the rotation of the winch does not affect'the gear-.11, -and vice versa.-

' A friction-gear 12 is arrangedJbelow the gear-11 and is causedto rotate with the shaft .6 by'eugagement with the feather 8; but at the same time it is adapted to slide vertically on the shaft and feather. The inner side of the gear 11 is beveled, as shown in Fig. 3, and the upper edge of the friction-gear is adapted to enter and eugage suchbevel. In such movement it is apparent the gear 12 is guided on the shaft 6.- For the purpose of adjusting the friction gear 12-that is to say, for hoisting itint'o frictional engagementwith the gear 11'I employ the obtuse-angle lever 13 (see Figs. 1 and l and the adjustable hand-lever-l ir The lever 13 is pivoted in a hanger-15, whichtis pendent lf-rom the under side -ofthe boom '2 and is provided at its innere'nd with a socket adapted to receive the conical head of the journal 16 of the frictiongear '12. As shown in Fig; 3, the said journalis-provided with an'enlarged head 16 land with a reducedportion that enters a socket in the lower conical-end of the gear 12 and is securedltherein by a transverse cotterpin'17; The outer end of the'lever 13, which is inclined downward at an obtuse angle, is

provided with an extension-13, having a slot,

of a clamp-bolt .18, which worksin the aforesaid slot. By this means the end lever may be placed in position for convenient access by the operator.

f It will be seen that by depressing the outer end of the hand-lever l l the friction-gear 12 will be raisedfand thrown into engagement with thegear '11 and that the parts may be thus firmly locked together, so that if the gear 11 be rotated like rotationwi-llbe imparted to the friction gear 12 and therethrough to the shaft6 and the winch 5, whereby the hoisting-chain 4 may be taken up or wound on the winch as required.

The means for imparting rotation to the gear 12 are the following: As shown in Figs. 1, 2, and 3, a shaft 19 is arranged vertically between the two parts of the boom 2 and has its upper bearing in a casting or frame 20,

which is secured to the ceiling at 21 and has its lower bearing in a casting 20, (see Figs. 1, 3, and 7,) which is attached to the post 1. This shaft 19 is provided near its lower extremity with a feather 22, and a pinion 23 is adapted to slide vertically thereon. When in normal working position, the said pinion engages the toothed periphery of the gear 11, as shown. The said shaft passes through a bracket or frame 24, (see Fig. 1,) forming the upper pivot of the post 1, and carries at its upper end a bevel-gear 25, which meshes with a like gear 26, which is keyed upon the driving-shaft 27. The latter is arranged horizontally and has its hearings in a pendent arm 28 and the pendent bars 29 of the casting or bolt 20, before referred to. It is apparent that when the power-shaft 27 is rotated like rotation will be imparted to the vertical shaft 19 and through the pinion 23 to the gear 11. It is to be assumed that the powershaft will be constantly driven, and of course the gear 11 will be rotated so long as the pinion 23 remains engaged with it. Thus the operator may at any time cause rotation of the winch 5 for winding on the hoisting-jib 4 by simply depressing the free end of the handlever 14, as before described. It often happens, however, that the application of handpower is desirable, and for this purpose I provide the following means: A shaft 36 (see Fig. 1) is arranged adjacent and parallel to the inner side of the postl and provided at its lower end with a bevel-gear 31, that en gages a corresponding one 32 on a crankshaft 33.

As shown in Figs. 1 and 2, a pinion 34 is arranged on the upper end of the said shaft 30 in the same horizontal plane with the pinion 23 of the power-driven shaft, before referred to. Also, like the pinion 23, it is adapted to slide vertically on a feather 35. It is apparent that if the pinion 23 of shaft 19 be raised out of engagement with the gear 11 the latter may be rotated through the medium of the pinion 34, shaft 30, and crank-shaft 33, and, contrariwise, the pinion 34 being raised out of such engagement the gear 11 will be rotated from the power-shaft 27 and vertical shaft 19. For duly adjusting the pinions 23 and 34 as required in the application of power through either of the media described I employ bars 36 and 37, which are arranged and adjusted as shown in Figs. 1, 4, and 6- that is to say, they are arranged vertically on opposite sides of the post 1, and each of them is provided with slots, through which pass guide-supporting pins 38 and 38. The lower slot 39 is right-angular in form, or what is commonly known as the bayonet-slot. The upper end of each slidable bar 36 and 37is provided with a lateral arm which is adapted to engage a grooved hub 40, (see Fig. 5,) forming an attachment of each of the pinions 23 and 34. Each of the bars is also provided with a laterally-projecting handle 41. (Shown in Figs. 1 and 4.) As shown in Fig. 1, the pinion .34 of the shaft 30 is engaged with the gear 11,

and consequently it is to be supposed that the opposite bar 37 is raised for holding the pinion 23 out of such engagement. It will be noted that in such case the pin 38 is at the upper end of the bayonet-slot 39. (See Fig. 1.) If now it be desired to throw the handoperated shaft 30 out of connection with the gear 11 and to put the power-driven shaft 19 into connection with the same, then the bar 37 is lowered to bring the pinion 23 down to its normal working position and the bar 36 is raised to carry the pinion 34 up out of engagement, and to hold it in such position the bar 36 is shifted laterally at its lower end, so that the pin 38 enters the horizontal portion of the slot 39, as shown in Fig. 6.

The manipulation of the bars 36 and 37 may be easily effected, and thus the power may be quickly shifted from shaft 19 to 30, and vice versa, as conditions may require.

It will be seen that the plate 20, with its pendent boss 29, not only forms the upper hearing of the power-driven shaft 19, but of the post 1 as well, since the bracket 24, attached to the latter, is socketed in the lower end of the boss 29, and the shaft 19 passes through it. It will be further seen that the plate 20 forms also the hanger or support for the power-shaft 27 and that it is not unduly weakened by the provision of a slot for the upper portion of the driving-gear 26. If for any reason it be necessary to arrange the power-shaft overhead or above the ceiling, it is obviously only necessary to reverse the bevel-gear 25-that is to say, to arrange it with its teeth upward instead of downward to adapt it for engagement with the powergear 26.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is.

1. The combination with the post, a boom, and a Winch arranged on the boom and hav ing a pendent shaft provided with a feather, ofa spur-gear which is loose on said shaft and provided with a friction-surface, a friction-gear adapted to engage such spur-gear, the same being slidable upon a feathered portion of the said shaft, a lever provided with a socket for receiving the journal of the friction-gear, whereby the latter may be adjusted as required, and a driving-shaft which is geared with the aforesaid spur-gear, substantially as shown and described.

2. The combination, with a post, boom, and winch having a pendent shaft, and a combined spur and friction gear mounted loose on said shaft, of a friction device mounted on the shaft and adapted to be engaged with the firstnamed gear, means for adjusting the said device, a driving-shaft provided with a feather and a pinion which is adapted to engage the spur-gear and to slide on the feathered portion of said driving-shaft, and means for raising the said pinion out of engagement with the spurgear, substantially as shown and described. 1

3. The combination, with a post, boom, and winch having a pendent feathered shaft, and

a combined spur and friction gear mounted loose on said shaft, of a friction-gear mounted slidably on the feathered portion of the shaft and adapted to be engaged with the firstnamed gear so as to cause rotation of the winch, a driving-shaft having a feather and a pinion mounted slidably on the feathered portion of said shaft and engaging the afore-- said spur-gear, and a slidable bar connected with said pinion for raising the latter out of engagement with the spur-gear, and means for locking the sliding bar in the raised position, substantially as shown and described.

4. The combination,with the rotatable post, the boom and winch and a shaft for rotating said winch, of a combined spur and friction gear mounted loose on said shaft, means for engaging and rotating the said gear, two vertical shafts having feathered portions and pinions adapted to slide on such portions and normally engaging the said spur-gear, and slidable bars arranged on the post and engaging the pinions for use in raising them, substantially as shown and described.

5. The combination, with a rotatable post, aboom, and a winch havingapendent feathershaft, of a combined spur and friction gear mounted loose on said shaft, a friction-gear mounted slidably on the feathered portion of the shaft and thus adapted to rotate with the latter, means for adjusting the friction-gear into engagement with the first-named gear, a power-driven shaft having a feathered portion, and a pinion mounted slidably thereon, substantially as shown and described.

6. The combination, with a post, a boom, and winch having a shaft, of a combined spur and friction gear mounted loose on said shaft,

. means for engaging such gear with the shaft,

raised position, substantially as shown and described.

7. The combination, with a post, a boom, and winch having a pendent feathered shaft, of a combined spur and friction gear, a friction-gear adapted to engage the first-named gear and slidable on the said shaft, a drivingshaft having a feathered portion, a pinion mounted slidably on the feather and engaging the first-named gear, a driving-shaft geared with the feathered shaft, a hand crankshaft journaled on the post, a vertical shaft geared with such crankshaft and having a feather on its upper end, a pinion mounted slidably thereon and normally engaging the combined spur and friction gear, and means for adjusting said pinions independently for substantially as shown and described.

8. The combination, with the post, the ,7

boom, and the winch having a feathered shaft,

and the combined spur and friction gear.

mounted on the shaft, of a friction-gear adapted to slide on the feathered portion of the shaft and to engage the first-named gear, a pivoted lever having a socket at its inner end for receiving the journal of the friction-gear, and a hand-lever forming an extension of the first-named lever; and means for locking the hand-lever at different angles; substantially as shown and described.

9. The combination, with a post having a boom, and winch journaled on the latter,.a gear mounted on the winch-shaft, and means for looking it thereto, a vertical shaft and a plate secured to an overhead support and 113V? ing a bearing for the vertical shaft and horizontal driving or power shaft also having its bearings in attachments of said plate and gears applied to the said shafts and one of them projecting through a slot in the plate, substantially as shown and described.

LEONARD S. FLEOKENS TEIN.

Witnesses:

JOHN B. FAIRBANK, W. S. WILSON.

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