US912434A - Hoist-block. - Google Patents

Description

W. a. STEPHAN;

HOIST BLOCK.

APPLICATION FILED AUG. 7. 190a.

Patented Feb. 16, 1909.

2 SHEETS-SHEET 1.

W. G. STEPHAN.

HOIST 'BLOGK. AIPLIOATION FILED AUG. 7, 1908.

Feb. 16, 1909.

2 SHEETS-SHFET 2 Patented INVENTOR [JI Arm/mm,

W/TVES'SES: 6%

' warren .e. 'STEPHAN, or CLEVELAND, care.

9 HOIST-BLOCK.

Specification of Letters Patent.

Patented Feb. 16, 1909.

Application filed august 7, 1908. Serial No. 447,370.

all'whone it may concern:

Be it known that l, \V ALTER (Jr. .S'rnrnax, a cltiz'en ofthe'United States, residing at C eveland, in the county of Cuyahoga and S ate of Ohio, have invented a certa n new and useful Improvement in Hoist-Blocks, of which the following is full, clear, and exact description.

T-he object/of the present invention is to provide animprovement in hoist. blocks.

The inventionis more particularly direct- "ed" to the embodiment of the block with a pressure gagdpermanently in position on the block, whereby the weight of the load 15 hoisted may be at all times ascertained.

'One of the purposes of my invention has been to eliminate the use of the ordinary hydrostatic weighing appliances commonly provided with means for attaching them to the hook of the hoist block and used only at suchintervals as may be necessary. These separate appliances cannot be kept on the hoist block continually in most cases, since the amount of head room occupied by the entire hoisting apparatus whenthese weighing appliancesare added, is too great to permit of their use at times other than required by absolute necessity. The elimination of these extra attachable and detachable weighing devices is further desired for the reason that since they cannot be kept on the hoist block all of the time, they are in the way when not in use, it being practically impossible to induce the workmen to store them properly. There is further an increased additional part is used.

' cylindrical ends 0' chance of accident always present when an By having a block constructed so that it itself is provided with a pressure gage always in position, safety of the hoisting apparatus is greatly increased so that it is j always possible for the operator to determine v at'a glance when the dangerlimit is being 3 reached on' the hook, and further, by having the blocks about an establishment construct .ed' in this manner, so that the load carried byany block may be determined, no matter if it be suddenly or casually brought into The above and other objects it will be seen are obtained by the structure of hoist block described in the following specification with reference to the accompanying drawings in which;

Figure 1 is an elevation showing a hoist block embodying my invention swinging from a traveling crane. larged vertical section of the block. I

The btock illustrated comprises an upper head A carrying sheaves A around w rich The lower is reeved the hoisting cable B. head Q of the block on which the hook D swings is connected with the upper head by suitable straps E and end plates E. This lower head comprises a trunnion bar C, with a central perforation C therethrough for the stem D of the hoist hook, having rotatably mounted in said strapsand plates so as to be freely oscillatable. This bar has a central conduit or channel C leading from one end thereof to an annular well C* about the perforation C? at the central portion, the well and the channel being adapted to receive some suitable liquid for use with a pressure gage F which is connected with the end of the channel. 'An annular piston G with flexible packing G" on the lower facethereof is in said well and sustains a centrally perforated plate (3- with a ball-race G on its upper face. A second plate G lies above this first named plate G and has a ball-race G upon its lower face so that anti-friction bearings may be held between the two plates and thus permit them'to rotate relative to 1 each other.

The stemof the hoisthook passes through the perforation in the trunnion bar, and the plate is locked in position by a pair of nuts or other suitable means. The hook 'so held is freely rotatable in the trunnion bar and the load carried by it is transmitted to the upper anti-friction plate 1 so that itis free to rotate in either direction.

From the construction of parts described Fig. 2 is an enit will be seen that the block is not only strong, but the parts are simple in their I character so that the block may be dismanuse to assist'other blocks in sustaining the 50 load, (a sort of use which would in practical work absolutely preclude the chance of an (additional weighing machine being hooked on to the block), it will be possible to de- -termine the actual load sustained by all of I dimensions taking up no additional room and eliminating the additional detachable 65 thev blocks without guessing or estimating i weighing machines with their numerous dishow the load maybe divided between them. :1 advantages.

Having thus described myfinvntion, I claim:

1. Hoisting means comprising a block with sheaves mounted therein for receiving the hoisting cable, and a trunnion barcarrying a hook and means for indicating the load suppor ed by the hook.

2. Hoisting means comprising a block with means for receiving the hoisting cable, and a bar trnnnioned in the block, a hook yieldingly carried by the bar and means for indicating the weight supported by the hook.

3. A hoist block COIDPIlSlHgIDQtIDS for receiving the hoisting cable, and a bar trunnioned in the block, a hook, a Well in the trunnioned bar, apiston slidingly fitted in said well, the hook being supported bythe' piston and a weight indicator connected with the Well.

4:- A hoist block comprising means for receiving the hoisting cable, a bar trunnioned irr'the block and perforated, a hook ith a stem projecting through said perforation, a Well adjacent to said perforation, a piston in the Well andreceiving the load of the hook, and a Weight indicator connected with the well.

In testnnony whereof, I hereunto afiix my signature in the presence of two wltnes'ses.

WALTER G. STEPHAN. Witnesses J. M. WVooDWARn, H. R. SULLIVAN.

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