US698738A - Elevator. - Google Patents

Description

Patented Apr. 29, |902. A. B. HONEY.

E L E V A T 0 R.

(Application led Oct. 10, 1'901.)

2 Sheets-Sheet I.

f wf@ No. 698,738. Patented Apr. 29, |902.

A. B. HONEY. ELEVATUR.

(Application med ocz. 1o, 1901.)l

2 Sheets-Sheet 2.

(No Model.)

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UNITED STATES ALEXANDER B. RoNEY,

PATENT OFFICE.

or CHICAGO, ILLINOIS.

'ELEVATOFL SPECIFICATION' forming part of Letters Patent No. 698,738, dated April 29, 1902.

Application filed October 10, 1901. Serial No. 78,183. (No model.)

To @ZZ whom t may con/cervo:

Be it known that I, ALEXANDER B. vRONEY, a citizen of the United States, residing at Chicago, county of Cook, and State of Illinois, have invented new and useful Improvements in Elevators, of which the following is a speci`.

cation.

The object of my invention is absolute safety, variable speed, economy of space, and' power.

Figure l is an outline view of the elevator. Fig. 2 is a vertical section of Fig.' l. Fig. 3 is a detail end view of the switch and its con-4 tact-strips. Fig. 4 is a section of a part of the racks indicated by A15 in Fig. l. Fig. 5 is a cross-section of Fig. l on the line C C. Fig. 6 is a view of Fig. l on the line B B. Fig. 7 is a detail viewo'f the split brake-ring,'and the part A24 is a section of the hand brake-V lever.

This elevator` comprises fa 'car A20, adapted to travel between guides D D D D, fixed in an elevator-shaftway, and has thrust-rollersA23 A23 A28 A23 attached to its sides in rolling con-v tact with the guides to prevent it turningl around. The car rests-on antifriction-balls A19, retained in a ball-race out in the headot' circular drum A21; The drum-A21 combines a screw or worm A1, in mesh With'the racks; that reach up on the oppositewalls theV full' length of shaftway. viithin the' screw-drum A21 is an electric motor havin gitsffleld-mag# netA1 suspended from the floor of the fear, while its armature is directly'cohnectedfto the drum, the screw of which meshes in the racks.

The mechanism of the racks is distinguished by a double `series of studs A15, 'diametrically opposite, equally spaced apart, with one end attached to the walls of the shaftwayand the otherl ends projecting, with'rollers' l'loosevl thereon.

Within the drum A21 are levers pivotedso as to havev their endsfree, andfast to one end of said levers are the horseshoe-magnets A A', that are adapted to contact with the stationed armature or iron field-magnet of the motor A4, and the other ends of said levers present cushioned shoes A3 A3 for compression by the cam-shoes projecting in from the drum. The spring-cushion vunder the brakeshoes ASAs is'a preferred but not an essential feature of the brake construction.

. The motor is series-wound and constructed in the usual manner, with ring armature spidered to its shaft, its coils Wired to the commutator, the commutator wired to, the controller, and the controller wired to the line-circuit.' One end of the motors fieldmagnet is shaped so that it can be bolted to the bottom of lthe car and iares out into a flange 'reaching under the shoulder projecting in from the head of the screw-drum, and between the shoulder and-flange is a groove filled with antifriction-balls A18, that are subject tothe action of the overcounterweighted car, not merely yas a safety-catchas much as la reducing factor in the amount of motive power saved by balancing the variable loads up to an average. v v

Now thatpart A11 of the controller-switch handle A8 extended over the contact-rails l 2 3 4 has angular sides, (seeFig. 3,) and to the respectiveisides pairs of metal strips are f attached, and the'contact'ends A14 of the strips standout andspan the intervening rails, so y that rails l and 3 and 2 and 4 are in circuit when theends of the strips l 3 and 2 4 register in contact with them. The other angle out and adapted to contact with rails l and 4 and"2`a'nd-3 when the switch-handle is turnedto close the circuit through the motor in the one direction, then to open circuit, and then to 'close it in the reverse direction.

*The switchf is'journaled in the end of link A2,fandthe'other end of the linkis hinged to :one end of the hand brake-lever A24, which is pivo'tedtothe car, and the other end of the `lever2A24isadapted to :spreadthe split ring A12'(s eefFigs.,2 and 7 )into frictional contact with the drum. l

Operatingy the elevator, the operator turns the switch-handle A8 to swivel the switch A11 onto the rails'l, 2, 3, and 4 to close the circuit through themotor. circuited rails l and 4 through its metal strips 1 4 in the positive and rails 2 and 3 through its metal strips 2 3 in the negative directions. Then the operator, still holding the switch down on the rails, now pulls the switch, and

Then the switch has l IOC opened and the motor-circuit closed.

the link A7, in which the switch is journaled, swings with the switch while guiding it over the rails in regulating the ow of current through the motor. Now the motoris revolving the drum, which with its screw ineshed in the racks screws itself np the shaftway to the floor desired. Now the operator lets go of the switch-handle A8, and the tension of the spring A, situated at the hinge, automatically throws the link and switch back over the rails until it strikes the bumper A12 and swivels the switch out of contact with the rails, thus opening the motor-circuit and at the same time by means of the metal strip A10, attached to the side of link A7, closes the brake-circuit through the horseshoe-magnets A' A', thus generating magnetic lines of force therein that attract the magnet ends of thepivoted levers down in contact with the stationed iron part of the motor, and at the same time the other end of said levers with brakeshoes spring-cushioned are thrown out against the cam-shoes A2 A2, projecting in from the drum, thus arresting the momentum of the drum until it stops. This brake action is positive in spite of the effort of the drums momentum to brake thetractive hold of the magnets and insures a kind of brake action that gives a smooth floor-stop without shock. The operator again manipulates the switch, as in the first instance, to elevate the car still higher. In doing so the brake circuit is The motor now revolves the drum, and its camshoes A2 A2 move bywithout touching the cushioned shoes A3 A3 until the motor-circuit is opened and the brake-circuit closed.

f Then they engage the cushioned shoes for the brake action, as before.

I run down by gravity.

Now this powerbrake may or may not be required to stop the car in its descent, because the pitch of the drumscrew can be so steep that the car will In that case the handbrake may be sufficient to hold it, yet the pitch of the screw can be such that it will `hold the drum and needs a kick from the motor tostart it down. brake will do. A

To apply the hand-brake while the car is running down by gravity, the operator grips the switch-handle A8 and draws the switch away from the rails I2 3 4, and the link to In that case the handwhichl the switch is a fixture is a part of the'f hand brake-lever, being hinged toit, thereby rocking the lever in its pivot, and the lower end of the lever spreads the split ring into frictional contact with the drum. Now should the motor be required to start the car down the operator will swivel Athe'switch onto the the operator can make the `motor kick the drum around repeatedly.

IVhat I claim; and desire to secure by Letters Patent, is-

I. In an elevator, in combination, an electric motor, electric circuits, a brake comprising an electric magnet suspended on one end of a lever pivoted to the car, a stationed armature near-by, a brake-shoe on the other end of said lever, a cam-shoe on the revolving motor parts, substantially as described.

2. In an elevator, in combination, an electric motor, electric circuits, a controller com'- prising a broken electric circuit, with three or more separated contact-strips interposed in the broken circuit,`an angular block ,pivoted to the car with contact-strips in pairs projecting from its angle sides for circuiting the motor, substantially as described.

3. In an elevator, in combination, vertical guides, screw-racks, a drum-screw meshed in the racks, a race of antifriction-balls bearing on the drum, the car between the guides and bearing on the balls,an electric motor with the car, electric circuits, a brake comprising an electric magnet suspended on one end of a lever pivoted to the car, a stationed armature near-by, 'a brake-shoe on the other end of said lever, a cam-shoe on the revolving motor parts for the purposes set forth.

4t. In an elevator, in combination vertical guides, screw-racks, a screw-drum meshed'in the racks, a race of antifriction-balls bearing on the drum, the car between guides and bearing on the balls, an electric motor with the car, electric circuits, a controller com" prising a broken line-circuit, three or more contact rails interposed in the broken circuit, an angular block pivoted to the car with contact-strips in pairs projecting from its angular sides for circuiting the motor, substantially as described.

5. In an elevator, in combination, vertical guides, screw-racks, a screw-drum meshed in the racks, a race of antifriction-balls bearL ing on the drum, the car between guides and bearing on the balls, the counterweighted car having ball-bearing connection with the drum, an electric motor with the car, electric circuits, a brake comprising an electric magnet suspended on one end of a lever pivoted to the car, a stationed armature near-by, 'a brake-shoe on the other end of said lever, a cam-shoe on the revolving motor parts, for ythe purposes set forth.

6. In an elevator, in combination, vertical guides, screw-racks comprising a series of studs with antifriction.- rollers thereon, a screw-drum meshed in the racks, a race of antifriction-balls bearing on the drum, the car between guides and `bearing on the balls,

an electric motor 'with the' car, electric cir-` cuits, a controller comprising a broken linecircuit with three or more separated contactstrips interposed in the broken circuit and an angular block pivoted to the car with contact-strips in pairs projecting from its angle IOO sides, a brake comprising an electric magnet suspended on one end of a lever pivoted to the car, a stationed armature near-by, a. brake-shoe on the other end of said lever, a cam-shoe on the revolving motor parts, substantially as set forth.

7. In an elevator, in combination, vertical guides, screw-racks comprising a series of studs with antifriction rollers thereon,`a screw-drum meshed in the racks, a race of antifriction-balls bearing on the drum, the car between guides and bearing on the balls, an electric motor with the car, electric circuits, a controller comprising abroken linecircuit, with three or more separated contact-strips interposed in the broken circuit ALEXANDER B. RONEY.

Witnesses:

GEORGE W. BRoAs, FRANK H. GRISWOLD6

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