US227875A - bennett - Google Patents

Description

3 Sheets-Sheet 1.

E. C. BENNETT.

Patented May 25,1880.

NFETERS. PHOTO-UTHOQRAPNF-R. WASHINGTON. D C.

(No Model.)

Portable Folding Derrick.

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(N0-Model.)

E. C. BENNETT, Portable Folding Derrick.

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3 Sheets-Sheet 3 (No-Model.)

E. G. BENNETT. Portable Folding Derrick.

Patented May 25,1880.

WJYQESEE':

UNITED STATES PATENT OFFICE.

EDVARD O, BENNETT, OF PHILADELPHIA, PA., ASSIGNOR OF ONE-HALF OF HIS RIGHT TO JOHN R. WHITE, OF BOSTON, MASS.

PORTABLE FoLolNe DERRICK.

SPECIFICATION forming part of Letters Patent No. 227,875, dated May 25, 1880,

Application filed April 9, 1880. (No model.)

To all whom it may concern Be it known that I, EDWARD C. BENNETT, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Portable Folding Derricks; and I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specication.

This invention relates to improvements in derricks; and it cousistsin the combination ot' devices, as hereinafter will be more fully shown and described, by means of which the whole may be folded together in a comparatively small space, so as to occupy but little room on the deck of a vessel. This is ot' great importance, as many places where vessels have to discharge their cargoes are not provided with suitable derricks or hoisting apparatus, and it is therefore very convenient and time-saving to carry a portable and folding derrick on the deck of the vessel, such derricks being constructed in such a manner as to be easily raised on the deck ot' a vessel whenever required for use.

On the accompanying drawings, Figure l represents a front elevation of my improved derrick. Fig. 2 represents a side elevation, and Fig. 3 represents a perspective view, thereof.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

On the drawings, a represents the deck of a vessel. b b represent the uprights of my improved derrick, which are jointed in their npper ends, by means of hinge-pins b b', to the cross-bar c, as shown. About midway on the uprights b b are jointed the braces l d, by means of the hinge-plates d d! and hinge-pins d d, as shown. The lower ends of both uprights b b and braces d d are pointed, as shown, so as to rest in suitable notches or recesses on the deck a., or in shoes secured to the deck, it' so desired.

c c are guys or stays extending from about the upper ends ofthe uprights to the deck a or other stationary part ot the vessel, so as to more firmly hold the derrick in place. Such stays may, however, be dispensed with.

j' is the bucket, to which the hoisting-ropes g g are attached, the latter being carried over the drums or cord-pulleys L h, located on the sha't't il, that is free to run in bearings secured to the uprights b I).

k is a guide-roller, also located on a looselyrevolving shaft that is free to turn in bearings iu the nprights l; b, as shown, and said roller serves for the purpose ot' properly guiding the hoisting-ropes g g from their pulleys h h to thevhoisting apparatus that is used.

l l are arms or levers, hinged at their lower ends, l, to each oil the uprights I) b, as shown, their upper ends being united by means ot' the cross-bar m, and provided with supporting chains or sta-ys a n, attached to the uprights I; b. The said bar m serves as a rest, against which the open top oi' the bucket f strikes when itis hoisted toits highest position to automatically dump its contents, and prevented from being carried entirely over and around the pulleys h h, and also to allow the empty bucket to descend automatically as soon as the hoisting apparatus is reversed and the hoistingaopes slackened.

0 is the adjustable chute or stage onto which the contents ofthe bucket are dumped. Said chute is hinged in its upper end, o', to each of the nprights b b, as shown, to allow for variations in the tide when the vessel is unloaded.

p is an adjustable support, jointed in its upper end to the outer end of the chute o, and adapted to rest iu its lower end against the deck of the vessel, as shown.

The cord-pulleys h h and their shaft, as well as the roller k, with its shaft, and the chute o, are all to be detached from the uprights I) b when the Iderrick is not required for use, so that it can be easily folded together and put away in a comparatively small space.

In Figs. l and 2 is shown a brake attachment for automatically stopping the pulleys h h from rotation when the bucket j' is carried to its highest point to dump its contents, and this device is shown as consisting or" an annu- IOO lar toothed ring, q, on the outer face of each pulley 7i, and a pawl-lever, 1", hung to the upright b at 1", and having a bent arm, 1"', in upper end, as shown, by which arrangement the bucket j', as it comes to its dumping position, as shown in dotted lines in 2, comes in contact with the arm 1", and thereby causes the pawl 1' to lock into the toothed ring q, as shown, and thus prevents the pulleys h h from turning until thebucketis again lowered, when the pawl-lever 1' by its own gravity comes again to the position as shown in full lines in Fig. 2.

To prevent mistakes in counting` the num ber ot' buckets that have been raised and delivered in a certain time, I provide the derrick with a dial-plate, s, having an index, s', connected to any ot' the usual and well-known registering apparatus, that is provided with a suitable projection, s, as shown in Fig. l, that is acted upon by the bucketj' striking the lever 1 and the latter striking the said projection s for each time the bucket is emptied, and in this manner an accurate account is obtained ot' the buckets emptied onto the chute 0.

I do not eoniine myself to any particular registering apparatus, as any ot' the ordinary kinds used for other purposes will serve my purpose to equal advantage.

ln addition to the self-registering dial s, I further provide the derrieks with a gong, t', as usual, and connected by means ot' a cord or link, t, or in any other well-known manner, to the pawl-lever 1 1"', so as to ca-nse the said gon to be struck once each time the bucket f is emptied, which is accomplished by the bucket j' hitting the lever 1"', which, being connected to the striker-lever t by means of the cord or link t, pulls on the latter, and thus strikes the gong.

In case it should be desired to weigh the contents of the bucket j' after it is filled and before it is being emptied, a suitable pair ot steelyards or similar weighing apparatus may be interposed between the hoisting-ropes g g and the top of the bucket j'.

Having thus fully described the nature, construction, and operation o' my invention, I wish to secure by Letters Patentand claim- 1. The herein-described portable and folding derrick-i'rame, consisting of the uprights b b, jointed in their upper ends to the cross-bar c, and provided with the braces d. d, jointed to the said uprights, as and for the purpose set forth.

2, In combination with the uprights b, cross-bar c, and braces d d, as described, the pulleys L h, guide-roller la, dumping device l l m 1t 1L, chute o, and support p, as and for the purpose set i'orth.

3. In a derriek, the combination ot' uprights b b, pulleys It lt, bucketf, and ropes y; g, ammlar toothed rings q, aml ]:)a\vllevers 1' 1"', as and for the purpose described.

1I. In a derrick, the combination of pulleys h h, ropes g g, bucketj", levers fr 1'", self-registering dial s, and gong t, as and for the pur pose set forth and described.

In testimony whereoi' I have a'llixed my signature in presence ot two witnesses.

EDWARD C. BENNETT.

I/Vitnesses:

ALBAN AND1-univ,

HENRY CHADBOURN.

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