US942735A - Hoisting device. - Google Patents

Description

E. A. MYERS. EoIsTIEG DEVICE. APPLICATION FLED APR. 4,1908. 942,735'. Patented Dec. '7, 1909.

2 SHEETS-SHEET 1.

`H. 3A. MYERS. HOISTING DEVICE. APPLICATION FILED APB.. 4, 1908.

Patented Dec. '77, 1909 2 SHEETS-SHEET 2.

HUBERT A. MYERS, OF GOSHEN, INDIANA.

HOISTING- DEVICE.

Specication of Letters Patent.

'Patented Dec. 7, 1909.

.')plication filed April 4, 1908. Serial No. 425,146.

To all whom 'it may con-cem:

Be it known that I, HUBERT A.. MYERS, a citizen of the United States of America, and resident of Goshen, Elkhart county, Indiana, have invented a certainnew and useful Iniprovement in Hoisting Devices, of which the following is a specification.

My invention relates to hoisting devices of that character in which an overhead sheave or pulley is employed, provided with a hoisting cable, and in which means are provided for .automatically locking the sheave or pulley, and the cable as well, against 'backward movement when the pull on the cable is relaxed, whereby the object being hoisted can be raised and allowed to .remain securely at any desired level, permitting the hoisting device to be moved horizontally to discharge the load at some point more or less remote from the place where it was picked up.

The object of my invention is the provision of an improved hoisting device of the foregoing general character, having improved means for automatically checking the fall of the object being hoisted, when the pull on the hoisting rope or cable is relaxed, and characterized by a simple and eilicient general construction, as well as certain details of improvement, whereby the device is both economical to manufacture and satisfactory in use'.

To the foregoing and other useful ends, my invention consists in matters hereinafter set forth and claimed.

In the accompanying drawings, Figure l is a vertical cross section of a hoisting de-l vice embodying' the principles of my invention. Fig. 2 is a vertical longitudinal section on line Q-Q in Fig. l. Fig. is a detail side elevation of the sheave or pulley. Fig. 4L is a detail sectional view of the lost motion connection between the locking dog and the casing or housing of the device. Fig. is a side elevation of the said hoisting device, certain upper portions thereof being broken away for convenience of illustration. Fig. 6 is a view similar to Fig. l, but showing the mechanism lin locked condition. Fig. 7 is a detail view of the eyebolt to which the hoisting cable is att-ached. Fig. 8 is a horizontal cross sect-ion on line 8---8 in Fig. 6. Fig. 9 is a perspectiveof the double dog. Fig. 10 is a perspective of the yoke-link that connects the eye-bolt with the double dog. Fig. 11 is a perspective of l shoe moving the brake shoe that bears upon the hoisting cable to automatically `check the fall of the object being hoisted, when the pull on the cable is relaxed, as will hereinafter more fully appear.

As thus illustrated, my invention comprises a casing or housing A, constructed in any suitable manner, as by making it in sections andbolting the same together. At its top the said housing is provided witha truck B having removable wheels b adapted to travel along the double steel track or way C. IVithin the housing is a sheave or pulley D having pins cl on the opposite sides thereof, arranged in a circle... The said sheave or pulley runs on an arbor or aXle cl extending through and supported in the sides of the housing. Said arbor is threaded at its ends and provided with nuts d2 having eyes d3. To these eyes are attached the shift ropes E, as shown. With this arrangement, the arbor or aXle serves as a connection for clamping together the two halves of the housing.

lAlso, it will be seen, the axis of the sheave or pulley extends in the direction of the movement of the hoisting device along the track or way C. The housing 1s provided jwith a socket or seat a for the spring F,

which latter supports the eye-bolt Gr. One end of the hoisting cable H is secured to said eye-bolt, and is arranged to run over the sheave or pulley I) and then to the ground where it can be operated. tackle or sheave I rests in the slack or sag of the said cable, and -may be provided with any suit-able means for securing it to the object to be hoisted. On the inner surface of the housing, at opposite sides thereof, guides a are provided, as shown.

The yoke-like double ydog J'einbraces the sheave or pulley and is provided with notches j that will catch the pins when the she-ave or pulley revolves backward, but will not interfere with the forward rotation thereof when the cable is operated to do the hoisting. The bifu'rcated end of said double dog is provided with pivot holes j, and at a distance back therefrom with holes jz. A brake-shoeK is embraced between the sides of said double dog, and a pivot pin L eX- tends 'through the said brake-shoe, as well as through the openings j. This pin is supported in the guides a, and in this way a lost motion connection is provided between the double dog and the housing, the brakeback and forth with the double f purely automatic in this respect.

dog. Thus the brake shoe'is supported directly on the housing and not on the dog, and the latter is also on the housing and not on thtl shoe. A yoke M embraces the sheave or'purley and connects the lockin .dog J with the upper end of the eye-bolt Normally, the parts are as shown in Fig. l, there being no load on the hoisting cable. This normal condition of the parts ris maintained through the coperation of the springs F and N, which latter connects the dog J with the housing, and keeps the pin L at the outer ends of the guides c', as shown in Fig..1. When the cable is loaded, however, and the pull on the cable .is relaxed, then the parts assume the positions shown in Fig. G. This is due to thefact that the slight drop of the load, when the pull on the cable lis relaxed, causes two of the notches j', the sp1-ing F being at this time compressed by the weight'carried by the cable. The back pull of the sheave or pulley causes'the shoe K to bear hard upon the vcable at the point where. the same starts over the sheave or pulley. andthus the load is checked againstl falling, the action heilig IVhen the cable is running light, then the sheave or pulley can be rotated in either direction.

' invention that, with .on the sheave for Any suitable. known or approved expedient can be en'iployed for releasing the load f rom the hoisting cable. It is an important consideration of my my improved construction, the brake-shoe K engages the rope or cable where the same starts over the sheave, as this gives increased the sheave, which tends to hold the cable' more secu-rely than if the the other side of the sheave.

What I claim 'as my invention is:

l.. In a hoisting device, a sheave or pulley, a hoisting cable therefor, means for securing one end of the cable to the said hoisting device, and aJ brake-shoe for engaging the cable where the same starts over the sheave or pulley from the end thereof where the power is applied, and means operated by the sheave and thel weight'on the cable for 0prope or shoe were at erating said brake-shoe to check the fall of the load.

2. In a hoisting device, a hoisting cable therefor, one end of the cable to device, a housing,

aI -sheave or pulley, means for securing 4the said hoistin` a locking dog pivoted d1- rectly on the housing, the axis ofthe said" sheaveor pulley and locking dog being fixed relativeto' each other, means on the sheave or pulley for 'engaging the dog, and means communicating the weight of the load to said dog to bring the latter into operative relation to said ,sheave or pulley. 13. In a hoisting device,

a sheave or pulley, a hoisting cable therefor,

pins (Zto catch in the grippingsurface to lor pulley means for securing one end. of the 'cable to the said hoisting device, a locking dog, means on the sheave' or pulley for engaging said dog, to positively lo t the sheave, and a' brake-shoe operated by saidA dog to engagev the cable where the same starts over the sheave or pulley from the end thereof where the power is applied to check the fall of the load.`

Ll. In a hoisting device, a sheave or pulley, a hoisting cable therefor, a pivoted locking dog for said sheave or pulley, and means for throwing the load directly on the said dog, at the outer sile of the pivot, so that the dogy sustains the weight thereof, to bring the latter into operativerelation to said sheave or pulley.

5. In a hoisting device, a housing, a sheave or pulley, a hoisting cabletherefor, a brakeshoe provided with a pivot having a slidingV connection with YsaidY housing, and means for utilizing the Weightfof the load to bring the i 6. In a hoisting device, a housing, a sheave or pulley, a hoisting cable therefor, a brake-v shoe slidably supported on the housing, and means operated by the sheave for utilizing the backward rotation of the sheave -or -pulley to draw the saidl shoe4 in-to engagement with the cable. v

7. In a hoisting device, a sheave or pulley, ay hoisting cable therefor, a yoke-like locking dog embracing the `top o f the sheave or pulley, means on the sheave or pulley for engaging the'yoke, and means for-supporting the load on the outer portion of said dog.

'8. In a hoisting device, a shea've or pulley, a hoisting cable therefor, a lookin dog for said sheave or pulley, means-on t e sheave for engaging said dog, and means by which the cable when Vloaded exertsa direct downward pull on said d0 9. In a hoisting devlce, asheave orpulley, a hoisting cable therefor, a locking dog for said sheave or pulley,meansonl the .sheave for engaging said dog, and meansfor -utilizing the weight of the load `for depressing the dog, the entire connectingmedium between the dog and cablehavin only downward movement to bringthe o into operative relation to the sheave or pu ley.

l0. In a. hoistin device, a sheave or pulley, a hoisting ca le'thereoi, a brake-shoe for enga ingsaid" cable, pivoted at one point only an a slidingconnection by reason of which the backward rotation of the sheave brings the Ysaid shoe into engagementwith the cable, as set forth.

llJIn a hoisting device, a sheave or ulley, a hoisting cable therefor, a .yokeike locking dog for said sheave or pulley, a yoke for connecting the end of the cable with said dog, and a spring for keeping the two yokes normally ralsed. `l2. In a hoist-ing device, a housing, a y sheave or pulley, a hoisting cable therefor, a

ing the dog with the pulley, a brake-shoe and a spring connect- A said housing to keep the brake-shoe normally out of engagement with said cable.

13. Ina hoisting device, a two part housing, an arbor extending through the two parts to bind the saine together, a sheave or pulley on said arbor, a hoisting cable for said sheave or pulle i, a shift rope attached locking dog for said actuated by said dog,

'to the end of said arbor, an automatic brake mechanisni supported on the two parts of the housing, and means for supporting the housing for horizontal traveling movement.

14. In' a hoisting device, a sheave or pulley, a housing the same, a locking dog forsaid-sheave or pulley, guides on said housing, a pivot pin for said dog slidable in said guides, and a 'brake-shoe on said pin, adapted to engage the cable to check the fall of the load.

15. In a hoisting device, a sheave or pulley, a hoisting cable therefor, pins on the opposite sides of said sheave or pulley, and a yoke-like locking dog pivoted at one end and provided at therefor, a hoisting cable for each side with a notch for engaging said pins, the sides of the yoke einbracing the said sheave or pulley.

.16. The combination of a housing, guides onthe housing, a sheave or pulley 1n the housing, a. hoisting cable for said sheave or pulley, a dog pivoted to slide-in said guides, a brake-shoe on said pivot, a spring connecting the dog withy the housino to keep the brake .shoe normally out o? engagement with the cable', a link connecting the end of the cable with said dog, and a spring for keeping the link and dog normally raised.

1T. The improved hoisting device, com

prising a brake-shoe operative to engage the cable at'the point specied, a sheave, means on the lsheave for operating said brakeshoe,

and means for securing one end of the cable to said device, substantially as 4shown and described.

Signed by me .at Chicago, Illinois, this 23rd day of March 1908.

HUBERT A. MYERS.

Witnesses:

ALBERT J. SAUSER. SARAH LEWIS.

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