US1327876A - Hoisting device - Google Patents

Description

witnesses A. L. NYBLAD. HDISTIING DEVICE.

APPLICATION FILED JUNE 10. 1919.

' Patentd Jan. 13, 1920.

2 SHEETS-SHEET I.

A; L. NYBLAD.

HOISTING DEVICE.

AEEL'ICATION FILED JUNE 10. I919.

Patented Jan. 13, 1920.

2 SHEETS-SHEET 2- Inventor aw lZ/ zmz fa? flab/"neg zl/ilrzesses: W

sas

FFIC

HOISTING DEVICE.

. hoisting ropes.

' which are spaced apart.

Another object is to so construct my invention that it will prevent the entanglement of the hoisting rope with the rope or ropes being raised.

Another object is to so make my improved hoisting device that it can be easily connected and operated.

These objects, and other. advantageous ends which will be hereinafter described, I attain in the following manner, reference being had to the accompanying drawings in which Figure 1 is a side elevation showing my improved hoisting device,

Fig. 2 is an end elevation looking in the direction of the right hand side of Fig. 1

Fig. 3 is an end elevation looking in the direction of the left hand side of Fig. 1 with the hoistingrope omitted,

Fig. 1 is a fragmentary side elevation showing certain of the parts in a different position from that shown in Fig.1,

Fig. 5 is a sectional elevation taken on the line 55 of Fig. 3, all of the rope being omitted,

Fig. 6 is a sectional plan view taken on the line 6-43 of Fig. 1, and

Fig. 7 is an elevation showing my invention in operative position when being used to hoist a flag.

Referring to the drawings, 8 represents a supporting or block pulley which can be attached to any supporting structure and 9 represents a casing. The casing 9. as illustrated, is made of a piece of sheet metal. such, for example, as brass which is bent upon itself so as to provide sides 10 and 11 The end 12 is provided with two openings 13 and 1 1 through which project a portion of grooved or sheave pulleys 15 and 16 respectively, the remaining portion of these pulleys being Specification of Letters Patent. Patented Jan. 13, .1920. Application filed June 10, 1919. Serial No. 303,130. I

positioned between the sides 10 and 11 ofthe casing9. The pulleys 15 and 16 are freely rotatable on shafts 17 and 18 which are secured within the casing sides 10 and 11. I

. A guard or guiding plate 19 is positioned between the sides 10 andll of the casing-9 and extends substantially upright and is positioned within the width of the casing, as clearly shown in Fig. 5. This provides a channel 20 through which a hoisting rope. 21 is free to pass and the combination of the pulleys 15 and 16 and guard-19 prevent the hoisting rope from becoming cut or entangled due to the relative movement between said rope and the casing which will hereinafter be described.

The upper and lower ends of the guard 19 are bent in the form of eyelets which surround rods 22 so that said guard plate is permanently held within the casing and presents a smooth surface within its entire length and at its top and bottom to the hoisting rope.

Aametallic loop or yoke 28 is connected. between the sides 10 and 11 of the casing 9 by means of a bolt 24:. The upper closed end of the yoke 23, the shape of which is clearly shown in Fig. 3, provides a bearing for a shank 25 of an eyelet 26. The shank 25 isirotatably mounted within the yoke 23 so that it can turn in various positions to prevent the twisting of the rope from affecting the posit-ion of the casing during the hoisting operation of the device. Fig. 4: shows the eyelet turned at a different angle from that which it is illustrated in Figs. 1,

3 and 5.

A bolt 27 has its opposite ends supported by the sides 10 and llof'the casing 9 and i a link 28 has a hole 29 through which the bolt 27 extends, said link being positioned so as to freely swing between the sides 10 Y and 11, as clearly shown in Figs. 1, 3 and 5.

The lower end .of the link 28 is splitat 30 to permit an attaching link 31 .which, for example it willbeconsidered, is connected to the flag-bearing rope 32, to be coupled thereto. The attaching link 31, as illustrated, is also split asshown at 33 so that by bringing the split portions of said links into register with each other, the link 31 can he slipped into coupling engagement with the link 28, as clearly shown. in Figs. 1.

and 3.

From the foregoing descrlption of the sides 10 and 11 are flared, as shown.

construction of my improved device, it will be understood that the guard 19 forms a barrier between the yoke 23 and link 28 on one side of the casing and the two pulleys 15 and 16 on the other side of the casing. Thus a free channel is provided for the hoisting rope 21 without chance of interference or undue'friction upon the rope 21. The rope 21 passes over the block pulley 8 and is attached to the eyelet 26. Thus it will be understood that by pulling the rope 21 that the casing and its connected parts will be raised and with it the flag-bearing rope 32 which, as shown in Fig. 7, hasa flag 34 attached thereto.

It will be further understood that the guard 19 prevents the rope 21 from engag ing the rope 32. Thus in pulling the rope 21, the tendency of the ropes will be to spread apart, as shown in Fig. 7, and thereby avoid the possibility of entanglement of the ropes. All of the parts thus tend to keep the hoisting strand of the rope sepa rated from the strand which is being raised. In addition, the fact that the eyelet 26 is pivoted, prevents any twisting of the hoisting rope from effecting or imparting a twisting movement to the casing or its connected parts, since, ifthe rope 21 is twisted, the eyelet 26 will rotate to take the twist out of the rope.

During the hoisting action, if the rope ll is pulled at such angle as to move into on gagernent with the pulleys 15 and 16, these pulleys will serve as anti-friction means to permit a free movement of the rope.

' By providing the openings 13 and 1 1 in the casing 9, the size-of the casing can be kept at a minimum by allowing a portion of the pulleys to project, as shown in Figs. 1, 5 and 6, and access can be had to the shafts 17 and 18 f r oiling or cleaning purposes.

The upper and lower edges of the casing at 35. Thus the rope 21 can' be moved sidewise without danger of the upper and lower edges of the casing fraying or shearing it.

While I have described my invention as taking a particular form, it will be understood that the various parts of my invention may be changed without departing from the spirit thereof, and hence l'do not limit my self to the precise construction set forth, but consider that I am at liberty to make such changes and alterations as fairly come within the 'scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Let'- ters Patent is:

1. A device of the character described including a casing having two sides spaced apart; a guard located between said sides within the width of said casing and together with one end and the sides of said casing providing a channel through which a rope can pass; a yoke; a bolt connecting the ends of said yoke to the sides of. said casing at a position between said guard and the opposite end of the casing; and an eyelet having its shank pivotally connected to the portion of said yoke between its ends; substantially as described.

2. A device of the character described including a casing having two sides spaced apart; a guard located between said sides; an anti-friction pulley positioned between said sides and in conjunction with said guard and casing sides providing at one side-of said guard a channel open at its top and bottom and through which a rope can pass; and rope coupling means connected to said casing at the opposite side of said channel and adjacent opposite ends thereoifisub stantially as described.

3. A. device of the character'described including a casing having two sides spaced apart; a guard located between said'sides; an anti-"friction pulley positioned between said sides and in conjunction with said guard and easing sides providing at one side of said guard a channel open at the top and bottom and through which a rope can pass and a pivotally mounted eyelet connectedto said casing at one side of the channel and adjacent one end thereof; substantially as described.

4. A device of the character described in cluding a casing having two sides spaced apart; a guard located between said sides; an anti-fricti0n pulley positioned between said sides and in conjunction with said guard and casin sides providing a channel through which a rope can pass; and a pivotally mounted eyelet and link connected to said casing at one side of the channel; sub stantially as described. i

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

AXEL L. NYBLAD.

lVitnesses:

R. A. F. DoRMcnY F. H. Don uoEY.

Images