US579797A - Isaac c - Google Patents

Description

(No Model.)

MMA e Y JMLM.

muon.

Nrlnn ArnNr ISAAC C. GRAY, OF TIPPEOANOE, INDIANA, ASSIGNOR OF ONE-FOURTH TO LORENZO D. ELY, OF SAME PLACE.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 579,797, dated March 30, 1897. Application tied January 4, 1897. serian). einen.` da model.)

To all whom t may concern: blocks t 4', consisting of substantial blocks Be it known that I, ISAAC O. GRAY, a citiof Vmetal or other suitable material adapted Zen of the United States, residing at Tippeto stand squarely and firmly on the bottom canoe, in the county of Marshall and State of of the housings or openings in which they are 55 5 Indiana, have invented certain new and usearranged and formed or provided with stems fullmprovementsin Elevators; and I do de- 5 5, serving as guide-stems for the coiled clare the following to be a full, clear, and excushion-springs 6 6, arranged thereon with act description of the invention, such as will their lower ends seated on theupper ends of enable others skilled in the art to whiehit apthe blocks and their upperends lodged against 6o ro pertains to make and use the same, reference the upper end of the housings or openings,

being had totheaccompanying drawings, and substantially as seen in the drawings, the

to the letters and figures of reference marked object being to provide buffers to relieve the y thereon, which form a part of this speciiieajar which would otherwise occur on the sudtion. den engagement of the safety-catches when 65 15 My invention has relation toimprovements the carriage would suddenly descend.

in elevators; and the object is to provideasim- C O designate the safety-catches, substanple, efficient, and reliable safety catch or grip tially of the form shown in the drawings, pivfor vertically-moving and suspended elevatoroted to the cushion-blocks, as at 7 and havcarriages, whereby when the suspension-caing their ends overlapped, as at 8, the under- 7o 2o bles break orthe progress of the carriage is lapped end being formed with a suitable seat stopped by accidental causes it will be auto- 8', in which the cable-link 9 engages. This matically prevented from descent by engagecable-link is of the usual form and is arranged ment of the catches in racks or ratchets on centrally and loosely about the upper bar or the guides. rail of the frame. The catches C O are sup- 75 2 5 I have fully and clearly illustrated my inported so that their catch ends aline with the l vention in the accompanying drawings, racks on the guide-posts, and have an odset, whereinas at 10, made in them, so as to bring their Figure 1 is an elevation of thel carriagearms orstems directly under and in alinement frame of an elevator having my improvewith the cross-bar above them. In the arm 8o 3o ments applied thereto. Fig. 2 is a detail side of each catch is iixed avertical guide-stud l1, view of the auxiliary catch and lever for enabout which is arranged a buiier-spring 12, gagement with the rack and to throw the the lower end ot' which rests on the arm of main catches into engagement with the racks the catch and the upper end under and against in case they are held by a partially slacked the top rail of the carriage-frame, substan- 8 5 3 5 or broken cable. Fig. 3 is a top or plan view tially as seen in the drawings, the springs actof the auxiliary catch and lever. ing to throw the catches down and into en- Referring to the drawings, A A designate gagement with the racks when the strain or the guideposts for the elevator carriage stress on the cable-link is slackened. frame, formed or provided with grooves or It will be perceived from the foregoing de- 9o 4o Ways l (indicated in dotted lines in Fig. 1) scription, taken inconnection with the drawand provided with racks or ratchets 2 to be ings, that should the cable break the stress engaged by the catches on the carriage, as on the catches will immediately be relieved hereinafter more fully specilied. and the force of the compressed springs at B designates the frame which carries the once be exerted to move the arms of the 95 45 car or carriage. This frame is composed of catches downward and throw their catch ends vertical side timbers or pieces l' and bottom into engagement with the notches of the racks, and top pieces 2 2', all suitably secured toand thus stop the carriage and hold it from gether, as usual. In the upper end portions descending farther. of the side pieces 1 are formed vertically- For additional security and to insure the roo 5o elongated openings 3 3', of the same size and action of the catches in any and all exigendimensions, wherein are disposed cushion cieswhere it may be required to bring them into action I provide an auxiliary lever and catch of the following construction: On the top rail of the carriage-frame is strongly secured a plate or bracket 13, formed with a downward-extending lug 13', to which is fulcrumed a lever 14, so arranged that its inner and short arm will bear normally on the arms of the catches and having its outer and longer arm extended adjacent to the rack, and has the end pivotally secured to the buifenbloek, substantially as seen in the drawings. This lever is pivoted or fulcrum ed in a slot formed in the depending' portion 13 of the lug 13, so as to have proper play to compensate for its requisite movements. To the outer end of the lever 14 is pivotally hung a pawl or catch 15, the lower catch portion 15' of which is carried into alinement with the rack by means of a bend or offset 1G. To the arm or stem of the catch 15 is rigidly secured a handle or lever 17, provided with a retractile sprin g 17 at its free end, the spring being connected to the arm of one of the main safety-catches, substantially as seen in the drawings, and to the outer end of the lever 17 is attached a cord or rope 1S, designed to be let through the top of the carriage and be manipulated by the operator. It will be perceived that if from any cause the main catches would fail to engage the racks when required to do so, by pulling on the rope 18 the catch 15 will be moved or swung outward into engagement with the rack, which engagement will act to move the buffer-block upward ,carrying there with the end of the lever 14C, causing the inner end thereof to bear on the arms of the main catches and throw their catch ends into engagement with the racks and thus hold the carriage securely against descent.

The operation may be stated as follows: Under ordinary action the pull on the cablelink holds all the catches out of engagement with the racks, but should the cable break or other accident occur which would cause the carriage to descend the force of the springs on the arms of the catches causes engagement with the racks and the force of the jar or stop being compensated for by the action of the springs on the buffer-blocks. As heretolore stated, should the main catches fail to engage the racks a pull on the rope connected to the handle of the auxiliary-lever catch will effect the engagement and hold the carriage.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an elevator, a safety-catch device, comprising a carriage-frame, oppositely-disposed guides for the carriage formed with racks, buffer-blocks housed in the frame of the carriage, springs over the buffer-blocks, safety-catches pivotally mounted on the buffer-blocks, and adapted to engage the racks and having their inner ends lapped, springs to throw the catches into engagement and a cable-link arranged over the lapped ends of the catches.

2. In an elevator, a safety-catch device comprising a carriage-frzmie, oppositely-disposed guides for the carriage formed with racks, buffer-blocks housed in the frame of the carriage, springs over the bnffer-blocks, safetycatches pivotal] y mounted on the buffer-blocks, and adapted to engage the racks and having their inner ends lapped, springs to throw the catches into engagement and a cable-link arranged over the lapped ends of the catches, an auxiliary lever f nlcrumed to bear with one end on the safety-catches, and its outer end connected to one of the bufferblocks, and a catch, having an actuatinghandle, pivotally suspended from the outer end of the auxiliary lever.

3. In an elevator, the combination with the guides having racks, main safety catches or levers, of an auxiliary safety device, comprising a lever fulerumed to the carriageframe with one end arranged to bear on the arms of the main safety-eatches, and a catcharm pivotally suspended from the outer end of the said lever and having a catch portion adapted to engage one of the said racks, and a handle on the catch-arm, substantially as set forth.

In testimony whereof I aix my signature in presence of two witnesses.

ISAAC C. GRAY.

Witnesses:

DAVID IIARRINGTON, S. C. BARRETT.

Images