US1297713A - Man-lift. - Google Patents

Description

w. 0. MERRILL}; J. E. W000.

MAN LIFT.

APPLICATIQN FILED JULY 30.4918.

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Patented Ma1'.v.18,1919.

Qvwemtozs v wwl Q r flttoznu UNIT STATES PATENT OFFICE.

WILLIAM D. MERRILL AND JAMES E. wooD, or PORTLAND, OREGON.

MAN-LIFT.

Specification of Letters Patent.

Patented Mar. 18,- 1919.

Application filed July 30, 1918. Serial No. 247,390.

To all whom it may concern.

Be it known that we, WVILLIAM D. MERRILL and JAMEs E. 001), citizens of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Man-Lifts, of which the following is a specification.

This invention relates to elevators and more particularly to the hoisting mechanism thereof.

The primary object of this invention resides in the provision of means for manually hoisting elevators with the heretofore necessity of overhead pulling on the hoisting rope eliminated.

Another object of this invention resides in the provision of an elevator hoistlng means whereby the hoisting rope will be automat1- cally maintained in a taut condition regardless of the motion of the elevator.

Another object of this invention resides in the provision of an elevator hoisting means which successfully maintains an even pull on the hoisting rope and further reduces the side motion of the elevator .to a minimum.

A still further object of this invention resides in the provision of an elevator hoisting means whereby the elevator can be operated with but little effort on the part of the operator.

A still further object of this invention resides in the provision of an elevator hoisting means which automatically prevents the elevator from moving when the operator re leases the controlllng means thereof.

With these and other objects in view, this invention resides in certain novel features of construction and arrangement of parts to be more particularly set forth in the specification herewith and pointed out in the appended claims, it being understood that the right is reserved to resort to such mlnor changes in detail as come within the scope of the claims.

In the accompanying drawing 2' Figure l is a side view of an elevator showing this invention in operative position thereon;

Fig. 2 is a view taken at right angles to Fig. 1 showing a portion of the near guide rail broken away.

In the present embodiment of this invention the numeral 5 designates an elevator which in this instance is shown as being of that type used in mines and buildings to carry an individual from oneelevation to another.

Secured to one of the standards 6 of this elevator is a bracket 7 of any suitable design which rotatably supports a drum 8 on a stub shaft 9. This drum has a ratchet periphery 10 formed integral therewith for coaction with a weighted pawl 11 to prevent a backward movement of the drum and the consequent descent of the elevator when the operator releases his hold on the manipulating wheel 12 that is operable with said drum.

Supported by one of the guide rails 12 or any other suitable support beneath the elevator is a bracket 13 on which is rotatably journaled a second drum 14 similar in construction to the aforesaid drum 8 with the ex ception that the manipulating wheel 12 is removed therefrom. This drum is provided with a ratchet periphery 15 with which coacts a weighted pawl 11 to automatically keep the rope taut and through the instrumentality of a weight 17 fastened to the free lower end of the rope 18, it is unnecessary to otherwise anchor the rope.

In order to rigidly retain the drum 8 in an operative position on the elevator, a standard 19 is fastened in any suitable manner to the floor 20 of the elevator and supports the shaft of the drum at its upper end.

With the above mentioned equipment in operative position on an elevator, it is necessary to rotate the manipulating wheel 12 to cause a similar movement of the drum 8 and when ascending the weighted pawl 11 is thrown in contact with the peripheral ratchet 10 of the drum 8 to prevent a reverse movement of the drum. Upon rotating the drum 8 with the pawl so disposed, the rope will wind around the drum and cause the elevator to move upwardly and since the free lower end of the rope is weighted, that portion of the rope which is unwound from the drum 8 will be first wound around the drum 14: and retained in a taut condition below said last mentioned drum for the pawl 16 will prevent a reverse movement of the drum 14 as the wei ht rotates it.

To lower t e elevator the pawl 11 is released and the manipulating wheel 12 is rotated in the opposite direction, whereupon the drum 14 and weight 17 will similarly perform the aforesaid function.

With this invention fully set forth it is manifest'that hoisting means are provided for elevators which are cheap of manufacture and readily operative.

Having thus described this invention what we claim is 1. The combination with an elevator, of a drum having a ratchet periphery and rotatably mounted on said elevator, a manipulating wheel movable with said drum, a second rotatable drum stationarily supported beneath the elevator, a rope around said drums with its ends extending in opposite directions, a

weight on the lower end of saidrope, and means controlling the movement of said drums in one direction.

2. The combination with an elevator, of a rotatable drum supported by said elevator, a rotatable drum stationarily supported beneath the elevator, a hoisting rope wound around said drums, stretching means engaging the free end of said rope, means controlling the movement of said drums in one direction, and manipulating means on one of said drums.

In testimony whereof we aflix our 'signa tures.

WILLIAM D. MERRILL. JAMES E. WOOD.

Copies of this-patent may beobtained for five cents each, by addressing the "Commissioner of Patents,

' Washington, D. G.

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