US843660A

US843660A - Hoisting-jack.

Info

Publication number: US843660A
Application number: US29479406A
Authority: US
Inventors: Charles Oliver Brewster
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-01-05
Filing date: 1906-01-05
Publication date: 1907-02-12
Anticipated expiration: 1924-02-12

Description

PATENTED FEB. 12, 1907.

C. 0. BREWSTER. HOISTING JACK.

APPLICATION FILED JARS, 1906.

1 EE an I EEE rica.

To all whom it may concern;

Be it known and remembered that hereto fore, to wit, on the 17th day of October, A. D. 1904, at, to wit, the city of St. Paul, in the county of Ramsey and State of Minnesota,- the undersigned, (,HARLEs 0. BREws'TER, in-

. vented a new and us eful Hoisting-Jack.

' minating at its lower'extremity by a nut-' My invention relates to that class of devices usually designated as hoisting-jacks, and has for its ob ect to improve the same in the several particulars hereinafter noted.

The invention consists of the novel devices and combinations hereinafter described,'and defined in the claims.

The invention is illustrated in the accompanying drawings, wherein like characters Indicate like parts throughout the several views. I I

Referring to the drawings, Figure 1 is a view in side elevation, showmg the improved device. Fig. 2 is a view of the said device in front elevation. F' 3 is a detail in plan, showing the swivelehi head of the jack-screw.

Fig. 4 is a. detail principally in vertical section, but with some parts left in full, showing a detachable socket and swivel-head and a' portion of-the jack-screw.- Fig. 5 is a bottom plan view of the detachable socket of the jack-screw.- Fig. 6 is-a pers ective view of the so-called nut-block, an Fig. 7 is aperspective view of the so-called thrust-block.

The numeral 1 indicates the heavy upright column or base of the hoisting-j ack, the same, as shown, being formed by a heavy timber, the lower end of which rests upon a groundengaging base 2. The said column 1 .is

formed with vertically-spaced perforations or bolt-seats 3. F

The numeral 4 indicates a channel-shaped so-called thrustblock, which in its upper end is formed with an enlarged interior tersupporting shoulder 5. The numeral 6 indicates a nut-block that fits loosely in the upper portion of the thrust-block 4 and rests upon the shoulder 5' thereof. In horizontal cross-section the nut-block is approximately -U-shaped, and the seat therefor in the thrustblock 4 is correspondingly formed, so that the said nut-block when seated on the shoulder 5 cannot'rotate', but nevertheless ma be sepa-' rated from the said movement.

The numeral 7 indicates a jack-screw that Works with threaded. engagement through the nut-block 6 and at each end is provided thrust-block y lateral Specification of Letters Patent. I Application filed January 5, 1906. Serial No. 294,794.

.column, so that it will be with an angular shank 8, the said two angular of the samecross-section, so J shanks being that either end is adapted to be inserted into the angular seat of a screw-socket This screw-socket 9 is provided with a swiveled 'Patented Feb. 12, 1907.

head 10 and is formed with diametrical perforations 11, into which the end of a rod or barmay be inserted in order to rotate the jackscrew.

The thrust-block 4 is securely but adjustablyattached to the column 1, and refer ably this is accomplished by a pair 0 laterally-spaced links 12 that are pivotally connected to said column by a nutted bolt 13, passed through one or the other of the perforations 3 thereof. As' is evident, the said thrust-block 4; may be secured to the column 1 at any desired altitude and under downward pressure thereon will, in view of the angularity of the links 12, be pressed laterally and fiimly against the opposing face of said el'd in a true vertical position or in true alinement with the said column.

Thenumerals 14 and 15 indicate, respec tively, what Idesignate as primary and secondarv resser-heads. Both of these heads',.as shown, are in the form of rectangular metal frames, having mounted therein

rollers

16 and 17, respectively. The said rollers are adapted to runagainst the column 1 to reduce friction, and the said heads are arranged to work on opposite sides of said column. The two heads are yieldingly connected by a pair of laterally-spaced links 18, pivotally attached thereto and arranged to embrace the column 1. To the primary head 1.4 is also pivoted a pair of laterally-spaced anchoring-links 19, that are adapted to be secured to the column 1 by means of a bolt or pin20. (Shown by dotted lines in Fig. 2.) The primary presser-head 14 rests upon the swivel-head 10, While the device or thing to be lifted may be rested upon the upper end of the presser-head 15. The numeral 21 indithe secondary set-screw 15'and is adapted to prevent slipping of the said head with respect cates a set-screw passed through the bottom of said head=1,4,' while the numeral 22 indi cates the set-screw'passed through the topof to the thing which is being lifted. In 1'.

the dotted lines marked '23 indicates the beam of a building or other structure which no It may here bestated that this improved i is assumed as beingrais'ed by the device.

lifting-jack is especially intended for use in lifting or pushing buildings or other heavy structures or things throug distance or space which is much greater than the length of the jack-screw 7. As is evident, a jack-screw of "weight. hand, may

great length would not have great strength unless made of large diameter and great The column or base 1, on. the other be made of any desired length and ofany desired strength.

Figs. 1 and 2 show the jack applied in working position to lift the structure or thing 23. In starting the jack into action the thrust-block 4 is secured low down on the column and that end of the jack-screw which [supported is turned upward,

projects but slightly above the nut-block 6 so that the primary and resse -

heads

14 and 15 will besecondary ow down for the proper initial -liftingaction. I Thejack-screwisthen turned and the inverted jack-screw then bein replaced inworking position, thethrust-blocx v 1 may-be raised and secured to the column in a such raised} position. Then after having 'the nut-block 19- are, by cured to the column 1, as shown by dotted dines injFigs.

and the load mameans of the jac above action and successively reversing the jack-screw end for end the load may be lifted or pus'he'd the entire length of the column 1.

until nearly its' entire length'projects above 6 Then the anchoring-links means of the bolt or. pin 20, se-

1 and 2', thereby anchoring the said primary and secondary presser-hea'ds 14 and their load to the column. This being done, the jack-screw may be loosened up and turned end for end-that is, with its long prov jecting end downward and its short rejectingpiend turnedupward. The nutlock. 6

turned the jack-screw upward so that it again carries the load the links 19 may be attached, be lifted further upward by -screw; By continuing the he device described would be 0 erative' evenwith'out' the secondary presseread 15;. but every much better action is obtained by the primary and secondarythe useof both 'With the said two heads presser-head's.

. connected by links'1'8the weight of the'load 'on t'h'e', secondary -both-ofthe'said heads 14 head 15 causes the'roller of and 15 t.0 tightly press; against the column, and thereby per-- fectsthe sald heads from falling away from the column-.- g

' In vfactual practice 5 found highly efficient for the purposes hadin view. It .is of course obvious that the device will be found very. serviceable for pushingheavy structures or moving the same n a horizontal direction, -as well as'in a vertical direction;

-1-. a device of the 1 ombination witlta column or post,-"of a .What I claim-is--- kind" described, the

the device has been a a a thrust-block anchored to the thrust-block securable in different positions longitudinally of said column, a presser-head adapted to travel on said column, and a reversible jack-screw and cooperating nut arrangedto cooperate and resser-head to cause with res set to the former, substantially as described.

-2. In a device combination with a column, of a thrust-block, and .a pre'sser-head, means forsecuring said thrust-block and presser-headto said column in different positions longitudinally thereof, and a reversible jack-screw andcooperating of the kind described, the

with said thrust-block j the latter to travel nut, which nut is adapted to be seated on said thrust-block either side up, and which screw is adapted to operate on said presserhead when turned either end up, substantially as described.

- 3. In a device of the kind'described, the

combination with a column, of a thrust-block and a resser-head, links and bolts for an choring said thrust-block and presser-head to said column in different positions longitudt nally thereof, a displaceable and reversible nut-block seated in said thrust-block, and a jack-screw working througlrsaid nut-block and adapted to operate on saidpresser-head when turned either described. a

4.. Ina device of the. kind described, the combination with a column 1, having perforations 3, of a channel-shaped thrust-block 4, links 12 and cooperating bolts 13 adjust'ably securing said thrust-block to said column 1, a

end up, substantially as.

roversible'nut-block 6 seated in said thrustblock 4, the jack-screw 7 working in said nut- 'block and having an angular shank at each end, asocket 9 adapted to receive either an'-- gular end of said jack-screw and provided with a swivele'd .head- 10, a primary presserhead' 14 adapied'to rest upon said head 10 and provided with rollers 16, the secondary resser-head 15 provided with rollers 17, said presser-heads 14' and inks 18 connecting 15, and anchoring'links 19 attached to. said primaryhead 14 and adaptedito'b'e secured.