US1541157A

US1541157A - Motor hoist

Info

Publication number: US1541157A
Application number: US665142A
Authority: US
Inventors: Fred H Linley
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-09-27
Filing date: 1923-09-27
Publication date: 1925-06-09
Anticipated expiration: 1942-06-09

Description

June 9, 1925. 1,541,4157

F. H. LNLEY MOTOR HOIST Filed Sept. 27. 1925 PatentedY June 9, y I

UNITED STATES,l

:man H. LINLEYQOF 'DULUTIL MINNESOTA;

Moron HoIsT.

Application led September 27, 1923. Serial No. 665,142.

To all 'whom it may concern:

Be it known that. I, F RED H. LINLEY, a citizen of the United States, residing at Duluth, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Motor Hoists, yof which` the following is a specification.

This invention relates to a new and 1mproved motor hoist and more particularly to a hoist of this type driven by a motor both the field and armature of which revolve.A

Hoists of this type are particularly adapted for use in underground mlmng operations where the hoist isused to drag a scraper of ore for loading,purposes. In such operations the scraper is normally dragged back to the ore pile by hand and the drag cable should run freely during this return movement. By having both ,the field and armature revolve and having them revolve' in opposite directions, the relative movement between the two members is in creased without 'increasing the movement of either relative to the yhoist frame.

It is an object of the present invention to provide a new and improved hoist driven by a motor having a movable field and movable armature.

It is a further object to provide a holst of this character in which the field and armature are adapted to be gear connected so as to control their relative movement.

It is also an object to provide a hoist vso connected in which the gear connection is controlled by centrifugal clutch.

It is an additional object to provide a hoist of this character in whichv the hoisl' drum is carried by one of the moving elements. 1

Other and further objects will appear as the description proceeds.

I have illustrated a preferred embodiment of my invention in the accompanying drawings, in which Figure 1 is a longitudinaatll section talc on line 1-1 of Figure 2; and Figure 2 is a cross section taken on line 2 2 of Figure 1.

The hoist comprises the frame 11 in which the hoist. drumu 12 is carried upon bearinfv 13 and 14. This drum 12 carries the field windings 15 of the motor. The shoulfle 16 of the drum member carries the slip rings 17 and 18 to which the motor operating current is fed from wires 19 and 2l). This current is transferred through brushes 2l and 22 to the armature commutator 23..

The armature 24 is carried upon the shat 25 which rests in

bearings

26 and 27 forme l in the hoist drum member.

end of the shaft 25 carries the gear 2S. This gear 28 meshes with the gear 29 which gear fits loosely on the stub shaft 30. The gear 29 carries the centrifugal clutch-mem bers 31 adapted to coact with the clutch disk 32 which latter is directly connected to thel shaft 30. The opposite end of the shaft 30 carries the small gear 33 which meshes with the internal gear 34 formed upon the inner face of the hoist drum flange 35.

In the operation of the hoist, when it is desired to draw in or wind up the cable upon the hoist drum, the current is supplied to the motor. ture to revolve relative to the field. The gear 28 causes the gear 29 t'o revolve and when the proper speed is reached. the centrifugal clutch members 31 grip the clutch `dish 32 thus rotating the small gear 33. This gear 33 meshes with the internal gear 34 formed in the hoist drum member and causes that member carrying the field to rotate in the direction opposite to the direction of rotation of the armature.

The relative movement, therefore, of the field and armature is made very high without causing the drum carrying the field rotate at an excessive speed. This -high speed of relative movement permits the hoist The right hand This causes the armato have comparatively high power and yet be of small size.

At the end of the hauling in movement, the current is shut oli and the motor is stopped. When it is desired to haul out the cable to carry the scraper back to the ore pile, the cable is drawn out by dragging away the scraper thusA causing the hoistl drum to rotate in the reverse direction. This rotation by means of the gear 34 causes the gear 33 and friction disk 32 to rotate. However, the clutch members 31 are at this time disconnected and consequently the armature is not rotated. The hoist drum itself thus rotates freely and the scraper may be drawn to the desired position without undue resistance by the hoist motor.

I have illustrated one preferred form of my construction and described one specific application of itto al particular use. .It is to be understood, however, Ithat it is adapted for other uses and I contemplate such changes and modicationsto adapt it to such uses as may come Within the scope of the appended claims.

I claim:

l. In a motor hoist, a hoist frame, an armature and a field, both said members being movable relative to the hoist fra-me,

gearing adapted to connect the armature and field to control their relative movement, and a speed controlled .clutch adaptedto bring said gea-ring into operation upon one of said members reaching a predetermined i hoist drum carried by said field, both said field and armature being rotatable relative to each other and to the hoist frame, gears carried by the armature and hoist drum, and further gearing and a centrifugal clutch adapted to operatively connect the armature and hoist drums.

1. In a motor hoist, a hoist frame, a field and an armature carried by said frame, a hoist drum carried by said field, both said field and amature being rotatable relative to each' other and to the hoist frame, gears carried` 4by the armature and hoist drum,

Ynormally in its inoperative position.

5. In .a motor hoist, a hoist frame, a field and an armature carried by said frame, a hoist drum carriedvby saidy field, both said field and armature being rotatable relative to each other and to the hoist-frame, gears carried by the armature and hoist drum, and further gearing .and a centrifugal clutch adapted to operatively connect the armature and hoistl drums, the movable clutch members being driven by the armature gear. y

6. In a moto-r hoist, a hoist frame, a field and an armature carried by said frame, a hoist drum carried by said field, both said field and armature being rotatable relative to each other and to the hoist frame, gears carried by the armature and hoist drum, and further gearing and a centrifugal clutch adapted to operatively connect the armature and hoist drum, the movable clutch members being driven by the armature gear, the clutch being .normally in its inoperative position.

Signed at Duluth, Minnesota, this 17th day of September, 1923.

FRED H. LINLEY