US2495804A

US2495804A - Hoist

Info

Publication number: US2495804A
Application number: US529017A
Authority: US
Inventors: Wallace W Berchtold
Original assignee: American Chain and Cable Co Inc
Current assignee: FKI Industries Inc
Priority date: 1944-03-31
Filing date: 1944-03-31
Publication date: 1950-01-31
Anticipated expiration: 1967-01-31

Description

Jam, 3l, 1950 w. w. BERCHTOLD 2,495,804

I HOIST Filed March 5l, 1944 2 Sheets-Sheet 1 YT o . W Q6 .H /r

@me l INVENTOR h/z 465 h/f/frm wml ATTORNEY Jan., 3l, i950 W. W. BERCHTOLD HOIST 2 Sheets-Sheet 2 Filed March 51, 1944 lNvENToR Mana-f /f/fmmm Patented Jan. 3l, -1950 HOIST Wallace W. Berchtold, York, Pa., assignor to American Chain & C

able Company, Inc.,

Bridgeport, Conn., a corporation of New York Application March 31, 1944, Serial No. 529,017

4 Claims.

This invention relates to improvements in hoists, cranes and lifting devices generally.

The objects of this invention are improvements in hoists, more particularly portable hoists including improvements which are also applicable to stationary hoists, travelling hoists, cranes and lifts.

More particularly, an object of this invention is an improved portable hoist provided with a hollow extension tube provided with a cable guide and supporting a cable pulley at a suitable distance from the hoist head housing the cable operating mechanism in order that objects may be raised in restricted spaces, and for the purpose of supporting the end of the extension tube the end of the extension tube or cable pulley housing may be provided with anchoring means adapted for connection to any suitable overhead support above said space.

As the space in which the hoisting is performed is restricted and in view of which the cable eye or hook must be of small size and consequently of insufficient weight to unreel the cable from the drum, and as the extension tube may be of such length as to place the cable eye or hook beyond the reach of the operator, it is an object of this invention also to provide means fol1 unreeling the cable by rotating the cable drum, means be'ing provided for facilitating such unreeling comprising a roller for pressing the cable against the drum and cable guiding means having one of its ends adjacent said drum and movable transversely of the face of the drum to follow the cable during unreeling.

It is also an object of this invention to provide means for locating a cable pulley and drum in the same or different planes, facilitating the use of the hoist under conditions where the object to be moved is to be moved laterally or in a direction at an angle to the vertical, or where for convenience of operation it is desirable to hold the hoist head in other than a vertical plane.

A further object of this invention is to provide means for supporting the hoist head on the operator or for supporting it by the hand of the operator, a plurality of crank means, one on each side of the hoist head, and a clutching means providing for unreeling of the cable by pulling on the end of the cable or by means of the weight of the cable eye or hook or a special load placed thereon where hoisting space permits.

Other objects of this invention will appear from the following description taken in connection with the drawings, in which:

Fig. 1 is a right side elevational view of a 55 portable hoist embodying improvements in accordance with this invention;

Fig. 2 is an end View looking toward the left in Fig. l;

Fig. 3 is a sectional detail view on the line 3 3 of Fig. 1;

Fig. 4 is a sectional detail view on the line 4 4 of Fig. 1;

Fig. 5 is a vertical section through the hoist head on the line 5 5 of Fig. 1;

Fig. 6 is a horizontal section on the line 6 6 of Fig. 5;

Fig. '7 is a vertical section on the line 1 1 of Fig. 5; and

Fig. 8 is a detail of a shiftable ring gear, the inner face of the cable drum and the driving pinion for the ring gear.

The improvements in accordance with this invention have been shown in connection with a portable hoist but obviously certain of the improvements are applicable to stationary hoists, travelling hoists, lifts and cranes.

As disclosed in Figs. l, 2 and 5, the hoist head or casing A is a composite construction including the main housing member I0 open on its right hand side and closed by a disk-like member II to the outer side of which is connected the third housing member I2.

The cable drum I4 on which the cable I5 is wound is supported on a main operating shaft I6 journaled in the casing members I0 and I I and to the left hand end of which is connected an operating crank I1 which is non-rotatably 'mounted on the shaft I6 and which may be used as a booster crank or unreeling crank or as a means for controlling the speed of unreeling of the cable from the drum by the weight of an object supported on the end of the cable.

Operatively associated with the right hand end of the shaft I6 is a crank I8 which is provided with a hub mounted for rotational movement on the shaft IG which is limited by the engagement of a lug carried thereby with shoulders on a member I9 (Fig. 1) secured on the shaft I6. Both of the cranks I1 and I8 may be made extensible Aas shown. The hub of the crank I8 also includes a brake and driving disk 20 and is provided interiorly with a low pitch square thread not disclosed but old and well known, which meshes with an exterior square thread on the shaft I6 and secured to the shaft at the inner end of the thread is a brake or driving disk 2|. Interposed between the disks 20 and 2I is an annular ratchet 22 which is provided with friction facings and which when the crank is movedv forward will be clamped between the

disks

20 and 2| and constitute the driving connection between these disks, that is, the driving connection between the crank I8 and shaft I6. Cooperating with the ratchet 22 is a ratchet pawl 23 to prevent retrograde movement or rotation of the ratchet and of the shaft I6 to hold the object lifted in its raised position. When it is desired to lower the object the crank I8 will be moved in the opposite direction to release the braking or clutching pressure between the disks 2D and 2I on the ratchet 22 to permit a raised object to be lowered. The speed at which the object is lowered may be controlled by controlling the amount of friction between the ratchet and the disks 20 and 2l and also by means of the crank I1. The constructions including parts I8, I9, 20, 2| and 22 are old and well known.

Connected to the shaft I6 is a pinion 25 (Figs. and 6) which meshes with gears 26 provided with hubs 21 rotatable on rods 28 supported at one end in holes 29 in the member II and at the other end in holes in an annular member 30 which is supported on the inner wall of the casing member II by means of horizontal members 3| cast integral with the members II and 3IJ. These members 3I will be referred to later.

Formed in the hubs 21 are pinions 35 the teeth oi which are in mesh with the teeth on the inner face of a ring gear 36, the outer face of which is provided with splines 38 in mesh with splines 39 on the inner face of the cable drum I4 constituting a driving connection between the ring gear and the drum.

For the purpose of providing free unreeling of the cable the ring gear 36 is mounted for sliding movement to disengage the splines 38 of the ring gear from the splines 39 ci the cable drum, but the movement of the ring gear is not sucient to disengage its interior gear teeth from the teeth of the pinions 35. For the purpose of eiecting this shifting movement of the ring 'gear there are provided slides 4U (Figs. 5, 6 and '1) which slide in guideways in the members 3I and which are provided with projections 4I operating in slots 42 in the guideways and which are operated by rods 43 connected to crank arms 44 on a shaft 45 journaled in the casing member I2 and provided with a maniplating means 46, as disclosed in Fig. 1.

The hoist head or housing A is provided with a split tubular short projection 50, as disclosed in Fig. 1, in whichl is secured an extension tube 5I by clamping means 52 of a well known form and shown in detail in Fig. 4. As shown in Fig. 1, this clamping means is provided to hold the rotational adjustment of the extension tube 5I with respect to the housing A.

Supported upon the outer end of the extension tube 5I is a cable pulley housing 55 in which is supported a cable pulley 55 over which the cable passes. The pulley housing may be provided with links 51 connected by a cross bolt 58 for connection with a hook 59 or the like which may be secured to a support above the space in which the hoisting operation is to be performed.

The end of vthe cable is provided with an attaching eye 6G which is shown as of small size and of a weight insufficient to unreel the cable from the drum. As the eye is of such small weight, means is provided for unreeling the cable from the drum by driving the drum from the cranks I1 and I8. For this purpose there is provided a pressure roller 60' (Figs. l and 5) which extends the full width of the drum and which bears on the cable, pressing the cable against the drum and causing the cable to be pushed toward the right when the operating cranks are moved in reverse direction to unreel the cable. This pressure roller is pressed onto the cable by any suitable means such as springs 6I which surround adjusting bolts 62 which have their heads bearing against the outer face of the hoist head casing element I0 and have threaded portions threaded into the ends of a rod 65 on which the pressure roller is rotatably mounted. This pressure roller is preferably made of a composition or synthetic material and acts as a brake and does not allow the drum to run wild causing the snagging of the cable when the mechanism is conditioned for free unreeling and the cable is unreeled by pulling on the end of the cable.

In order to support and guide the section of the cable between the drum I4 and the cable pulley 56 when the cable is unreeled by rotating the drum by means of the cranks, a cable guide 1li in the form of a tube is provided. The forward end oi the cable guide 16 is connected by a loose pivotal connection 'Ii in the cable pulley housing 55 so that the left hand end of the cable guide may move in anyl direction with respect to the pulley.

As disclosed in Fig. l, the hoist head or housing A and the pulley housing 55 are shown in the same vertical plane so that the left hand end of the cable guide 1G, as the cable is unreeled, follows the movement of the cable, that is, it moves horizontally, and to accommodate this movement and also to support the left hand end of the cable guide, the short extension is provided with a transversely extending wall 13 which is provided with a horizontally extending slot 14 constituting a guide and a bearing for the left hand end of the cable guide.

The hoist head housing or casing A may be provided with a hand hold 8D for convenience in supporting the hoist by either hand of the operator when operating the hoist by one hand. In the case where it is desired to use both hands in lifting objects or in lowering objects or in unreeling the cable, the hoist head may be supported on the body ci' the operator by a strap 8l which may be connected to a ring 82 supported on the hand hold 8i).

While the invention has been described with particularity as to the embodiment disclosed, it is to be understood that changes may be made within the principles of this invention and within the scope of the appended claims.

I claim:

l. In a hoist mechanism, a housing, a cable drum journaled in said housing, means for rotating said drum, an opening in said housing through which a cable wound on said drum passes and operates. a roller mounted in said housing and pressing a cable against said drum on a line adjacent to and to the rear of the point where the cable leaves said drum, a hollow extension on said housing through which said cable operates, a cable pulley on the outer end of said extension over which said cable passes, a cable guide extending from a point adjacent to said roller to a point adjacent to said pulley within said extension, and means supporting said cable guide therein.

2. In a hoist mechanism, a housing, a cable drum journaled in said housing, means for rotating said drum, an opening in said housing through which a cable wound on said drum passes and operates, a roller mounted in said housing and pressing a cable against said drum on a line adjacent to and to the rear of the point Where the cable leaves said drum, a hollow extension on said housing through which said cable operates, a cable pulley on the outer end of said extension over which said cable passes, a cable guide extending from a point adjacent to said roller to a point adjacent to said pulley Within said extension, and means supporting said cable guide therein and means on the outer end of said extension for attachment to an overhead support.

3. In a hoist mechanism, a housing, a cable drum journaled in said housing, means for rotating said drum, an opening in said housing through which a cable on said drum passes and operates, a roller mounted in said housing and vpressing against the outer face of a cable on said drum along a line adjacent to and to the rear of the point where the cable leaves said drum, an extension tube on said housing through which said cable operates, a cable pulley on the outer end of said extension over which said cable passes, a cable guide Within said extension tube, means pivotally supporting the outer end of said cable guide at a point adjacent to said pulley for universal movement and means on said housing supporting the inner end of said cable guide for transverse movement of said inner end of said cable guide with the movement of the cable as it is being reeled and unreeled from said drum.

4. In a hoist mechanism, a housing, a cable drum journaled in said housing, means for rotating said drum, an opening in said housing through which a cable on said drum passes and operates, an extension tube on said housing through which said cable operates, a cable pulley on the outer end of said extension over which said cable passes, a cable guide within said eX- tension tube, means pivotally supporting the outer end of said cable guide at a point adjacent to said pulley for universal movement and means on said housing supporting the inner end of said cable guide for transverse movement of said inner end of said cable guide with the movement of the cable as it is being reeled and unreeled from said drum.

WALLACE W. BERCHTOLD.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 402,688 Schulz May 7, 1889 1,060,103 Leichy Apr. 29, 1913 1,234,475 Hilding July 24, 1917 1,433,289 McKenna Oct. 24, 1922 1,760,514 Morgan May 27, 1930 2,221,903 Abramson et al Nov. 19, 1940I 2,256,982 Lawler Sept. 23, 1941 2,262,937 Holmes Nov. 18, 1941 2,284,120 Booker May 26, 1942 2,284,532 Napier May 27, 1942 2,391,172 Leland Dec. 18, 1945