US1380292A - Donkey-engine crane - Google Patents

Description

H. A. FHEDERICKS.

DoNNEY ENGINE CRANE, APPLICATION FILED FEB. |01 1920. y

Patented May 3L 1921.

2 SHEETS-SHEET l.

l llll! I NEE-'EM N l il H. A. FREDERICKS.

DONKEY ENGINE CRANE.

APPLICATION FILED FEB. Io, 1920.

Patented May 31, 1921.

2 SHEETS-SHEET 2.

MOT/M Gi should be completed within a brief a citizen of the United States lUNITED STATES y PATENT OFFICE.

HARRY A. FREDERICKS, OF PORT ANGELES, WASHINGTON.

DONKEY-ENGINE CRANE. Y

Specification of Letters Patent.

Application filed February 10, 1920. Serial No.'357,497.

facilitated, to avoid the inconvenience ordif encountered in connection with this narly operaton due to the necessity of jacking or prying up the drums or of manually lifting the same, as well as the loss of time incident to an operation which frequently interval in order to avoid interference with the functions of the apparatus, and to this end the invention consists in a .craneor transporting frame embodying hoisting means and embodying a construction and combination of parts of which a preferred form is illustrated in the accompanying drawings, wherein:

Figure 1 is a side view.

Fig. 2 is a plan view.

Fig. 3 is an end elevation partly in section.

Fig. 4 is a transverse section of the track rails.

Fig. 5 is a detail of the track rails.

Fig. 6 is a similar view of one of the socket plates by which the inner ends of the track rails are supported and secured against longitudinal displacement.

The apparatus is designed especlally for use in connection with donkey engines of the type employed as hoisting means in connection with building operations and having the furnace 10, bed plate 11, bearing pedestals 12 and drums 13 of which the latter are usually of metal and of a weight which renders the displacement thereof for the purpose or repairing or relining the bearings a matter of diiiiculty involving a considerable expenditure of time and effort view of a portion of one which the vfolstructures whereby they lporting surface,

vrigidity while `suitable points and usually necessitating the discontinuance for a considerable period of time of the use of the engine. Y f

The crane embodying the invention conslsts essentially of parallel track yrails 14 supported by standards 15 and 16 provided at their upper extremities with seats 17 for `the reception of the bars forming the rails to the end that when not in use the vframe may be folded or the parts disconnected for arrangement within a small space for storage; said railsl being traversed by travelers or carriers 18 from which depend `hoisting devices 19.

Obviously the crane may be set up in p0- sition to span the drums of the donkey engine wherever the latter may be employed,

- and to this end the standards are providedat their lower ends with spurs indicated at 20 for effective engagement with 'the supand laterally inclined braces 21 may be used in connection with Patented May 31, 1921,

the-terminal standards 16 to give transverse-.

connecting the track rails at are transverse brace bars 22 having terminal cl'ps 23 for engagement with said rails. Also as a means of increasing the rigidity of the structure the inner ends of the track rails may be provided with depending studs 24 for engagementwith sockets 25 carried by plates 26 which may be riveted or otherwise permanently secured to the wall of the furnace casing 10.

In the construction illustrated the travelers or carriers consist of rollers 27 from the pintles of which depend yokes 28 which extend under the rails and serve as means of attachment for the eyes or hooks 29 on the upper pulley blocks of the hoisting devices. The lower pulley blocks indicated at 31 carry stirrups or hooks 32 for engagement with the drums or drum spindles, and 0bviously when it is desired to displace a drum to give access to its bearings, the frame having been erected as indicated, the stirrups 32 of the opposite hoisting devices carried respectively by the travelers or carriers may be engaged with the drum and when the latter has been raised to a suicient elevation the drum may be moved longitudinally of the frame and deposited upon a suitable rest or vehicle which may be arranged in the space beyond the base 11 and between the same and the terminal standards 16, or may ing devices suspended from the stirrups and be held in the elevated position. until the provided with means for engaging. engine bearingsl have been repaired.y drums, said rollers being provided With pe- 40 In the peripheries of the rollers 27 thereripheral sockets for engagement by an operare provided sockets V33 at intervals for enating pin'. or rod.

gagement by a lever or pin 34 indicated 1n 2. A drum removing crane for donkey en- Figs. 1 and 2 to serve as a means of movin-g gines comprising in combination with the the travelers or carriers along the track,l `engine furnace, sockets mounted on said fur- 45 and said pins or levers are also adapted to nace Wall, track rails providedW-ith dependerform the additional function, in the event ing terminal studs engageable in said sockthat the track rails should not be exactly ets, standards supporting said track railsat horizontal, of serving as stops or chocks points remote from said sockets and having to bear' at their outer ends upon the track means at their upper'ends for detachable'en- 50 rails to hold the carriers or travelers at any gagement With said track rails, transverse j given place upon the rails, to prevent the bracing means detachably engaged with and movement of the same beyond the' point spanning' said rails, and carriers. mounted desired. upon the rails and provided With drum From the above description it will be seen hoistingmeans. 55 that the apparatus may be conveniently set 3.` An apparatusforthe purpose indicated up over the engine Whenever required Withhaving parallel track rails' and means for out involving any considerable loss of time supporting' the same, carriers or travelers and Without during the period of erection mounted upon said rails and consisting of serving to interfere With the operation of rollersy provided with depending stirrups, 60

the engine,V and when desired a drum may hoisting means suspended fromthe stirrups be removed With but slight lossv of time to and provided with engine drum engaging ermit of the operator giving the proper elements, the said rollers. being; provided attention to the bearings and then replaced With radially disposed uniformly spaced pe- Without` necessitating any extended period riphera'l sockets, and operating pins remov- 65 of idleness of the engine and Without imably engaged in said' sockets for imparting posing any objectionable ,effort upon the angular movement tothe rollers as well as operator..` Y acting aschocks for theisame by engagement What 1s claimed is: vvithl said rails as herein shown and specil.` An apparatus for the purpose described ed. 70

having parallel` tracky rails and means for In testimony whereof I affix my signasupporting the same, carriers or travelers ture.

mounted upon said rails and consisting of rollers having depending stirrups, and hoist- HARRY A.- FREDERICKS.

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