US535347A - Harry w - Google Patents

Description

NTTED STATES PATENT OFFICE@u HARRY IV. BOLENS, OF PORT WASHINGTON, WISCONSIN, ASSIGNOR TO THE GILSON MANUFACTURING COMPANY, OF SAME PLACE.

CHAIR.

SPECIFICATION forming part of Letters Patent No. 535,347, dated March 12, 1895.

Application ld November 20, 1893. Serial No. 491,374. (No model.)

T all whom it may concern: the operatorwhen said spindle is to be run up Be it known that I, HARRY W. BOLENS, a or down. citizen of the United States, and a resident of To positively maintain the spindle in its Port Washington, in the county of Ozaukee, vertical adjustment a clamp of some descrip- 5 and in the State ofWisconsin, have invented tion is necessary, and while various devices certain newand useful Improvements in of this character may be found suitable for Chairs; and I do hereby declare that the folthe purpose, I prefer the one herein shown, lowing is a full, clear, and exact description the same consisting of a metal block D havthereof. ing a threaded concave surface in mesh with 5c io My invention has for its object to provide the spindle C,and a screw E having a nona chair of that class having pivotal seats adthreaded extremity d in loose upset engagejustable to various elevations at will; and it ment with the block, this screw being arconsists in certain peculiarities of construcranged to work in a threaded bearingF formed tion and combination of parts, whereby a with or held on the castingA above specified. i5 chair-seat inayhave free rotation While in lock The seat-iron Gis provided with la dependagainst movement in a vertical direction or ing pivot I'I that loosely engages the socket be held against independent rotary motion in the spindle C, and as herein shown the while being raised orlowered, and by the same pivot has a lateral lug e that enters the chammeans said seat may be kept from both robered portion h of said socket through a ver- 7o zo` tary and vertical movement, my improved tical ehannelfand serves asastop to prevent means for accomplishing the above enumerunpremeditated disengagement of said seatated results being hereinafter specifically set iron and spindle. Inasmuch as the luge and forth with reference to the accompanying channelj'1 may be in register at any time or drawings and subsequently claimed. come into register when the chair is lifted,it z5 In the drawings: Figure l represents a veris desirable that some means be employed to tical transverse section of a portion of a chair close the entrance-channel to the chamber in embodying my improvements, and Figs. 2 and the spindle, and as one way of accomplishing 3, horizontal sections respectively taken on this result I show a spring stop I arranged in lines 2 2 and 3-3 of the preceding figure. a recess portion of the spindle-head and pro- 8o 3o Referring by letter to the drawings A repvided with a linger g by whichit may be reresents a casting having a screw-threaded tracted whenever necessary or desirable. bore and exterior sockets, these sockets be- To lock the seat-iron pivot I-I against rotaing for the reception of the upper ends of legs tion I mayemployaset-screwJherein shown as B, the latter and said casting constituting havingits bearinginthespindle-head. While 35 what is generally termed a chair-base. Enthe screw J is sufficient as a means for lock- `gaging the bore of the casting is a screw-spining the seat-iron pivot to the spindle, various dle C that differs from those of ordinary conother means may be employed for the same struction in so far that its upper portion is purposewithoutdeparturefrommyinvention. recessed for aconvenient distance in a verti- Owing to the fact that the spindle is gen- 9o 4o cal direction to form a socket, and, as herein erally made of steel and the seat-iron pivot shown, I may increase the diameter of this of cast-iron there will be more or less wear socket at a certain point intermediate of its between the two. 'IhereforeI make the chamextremities to thereby provide an annular ber l) in said spindle of sufficient depth to perchamber b, the latter being of any desirable mit of a considerable descent of the pivot-lug 45 depth. In order to compensate for loss of e, and said chamber is also intended as a re metal incidental to the formation of the chainceptacle for a supply of lubricant. ber, above specified, the adjacent portion of To vary the elevation of the spindle, the the spindle may be enlarged to form a nonclamp is loosened and said spindle revolved, threaded head c of any dimensions or design either by its head or by turning the chairroc 5o found most convenient or desirable, and such seat, provided the latter be in lock with the a head will be found useful as a hand-grip for aforesaid spindle. The spindle having been adj usted to the desired elevation and clamped,

- the seat-iron pivot will be ordinarily left free to turn in its socket so that the occupant of the chair may swing about Without causing movement of said spindle up or down, but it is obvious that the chair-seat may be held against both rotary and vertical movement by the proper adjustment of the locking devices above specied.

From the foregoing it will be seen that the spindle has the same range of vertical adjustment as those of the most ordinary construction and there is no possibility of lubricant dropping down on the surface upon which the chair-base sets.

Another advantage of my chair consists in the fact that it can be shipped in a knockdoWn condition and no tool or skilled mechanic are necessary to properly assemble said chair, lthis being a matter of considerable importance to the trade.

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

1. The combination of a chair base, a spindle connected to the base and recessed at its upper portion to form a vertical socket, an annular chamber communicating with the socket and a vertical entrance channel to the chamber; a seat-iron havinga depending pivot that engages said socket, a lateral lug on the pivot let into said chamber through said channel, and a suitable device arranged in the spindle to close the aforesaid channel against Withdrawal of the pivot-lug from the aforesaid chamber, substantially as setforth.

2. Thecombiuationof a chair-base, a spindle vertically adjustable in the base and recessed at its upper end to form a vertical socket, an annular chamber communicating with the socket and a vertical entrance channel to the chamber; suitable means for locking the spindle in adjusted position, a seatiron having a depending pivot that engages said socket, a lateral lug on the pivot let into said chamber through said channel, and a suitable device arranged in the spindle to close the aforesaid channel against Withdrawal of the pivot-lug from the aforesaid chamber, substantially as set forth.

8. The combination of a chair-base, a spindle connected to the base and recessed at its upper portion to form a vertical socket, a chamber communicating with the socket and a vertical entrance channel to the chamber; a seat-iron having a depending pivot that engages said socket, a lateral lug on the pivot let into said chamber through. said channel, a suitable device arranged in the spindle to close the aforesaid channel against Withdrawal of the pivot-lug from the aforesaid chamber, and a set-screw in said spindle opposed to said pivot, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, at Port Washington, in the county of Ozaukee and State of Visconsin, in the presence of two Witnesses.

H. W. BOLENS.

Vitnesses:

WM. AHLHAUSER, .Tor-IN GILsoN.

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