US 336220 A
Description (OCR text may contain errors)
(NoModelL) J. N. PARRAR.
No. 336,220. Patented Feb. 16. 1886.
UNITED STATES PATENT QFFICE.
JOHN N. FARRAR, OF NEW YORK, N. Y.
SPECIFICATION forming part of Letters Patent No. 336,220, dated February 16, 1886.
Application filed April 13, 1885.
' To all whom it may concern.-
Be it known that I, JOHN N. FARRAR, of the city, county, and State of New York, have invented certain new and useful Improvements in Dentists Chairs; and I do hereby declare that the following is a full and clear description thereof, which will enable those skilled in the art to construct the same, reference being had to the accompanyingdrawings, and to the letters of reference thereon, which form a part of this specification. Y
My invention relates to improvements in dentists chairs; and it consists in combining with such chairs one or more seats, which are capable of revolving around the column or base of the chair, as a consequence of which the operator or his assistant, or both of them, are enabled to place themselves in any desired position with reference to the person being operated upon; and it further consists in cer tain other combinations, which will be more fully described and claimed hereinafter.
Figure l of the drawings is a perspective view of a dent-ists chair having one form of my improved parts applied thereto, it showing two rotating seats attached thereto and the means of adjusting them both horizontally and vertically. Fig. 2 is an elevation, partly in section, showing the base of the chair, the supporting-column, the two revolving sockets to which the adjustable arms are attached, with a seat upon one of them, together with the methods of attaching the arm to said sockets and the devices for adjusting the arm horizontally. Fig. 3 is an elevation showing a portion of the base and supporting column, the revolving sockets and the collars, and set-screws for adjusting and keeping the sockets in position. Fig. at is a plan View of one of the revolving sockets, showing the slot in the endof the arm for the reception of the adjustable arm-catch.
Corresponding letters refer to corresponding parts throughout all of the figures.
Dentists chairs as heretofore constructed have been found to be objectionable on account of the fact that the seat for the operator or for his assistant, or either of them, has not been capable of being turned entirely around the person being operated upon, owing to which the operator has been obliged to leave his seat portions of the time during Serial No. 162,044. (No model.)
which the operation continued, thus causing him great inconvenience as well as fatigue. \Vith a view of removing this and other objections I construct a chair having any suitable seat, A, provided with foot-rest A, back A head-rest A, and suitable means for adjusting them. From the base B of such a chair there rises a supporting-column, B, upon which the revolving sockets B B are placed, and upon which they move. To each of the projecting portions of the sockets B there is secured an arm or seat support, 13", which may be of the form shown in Figs. 1 and 2, or of other suitable forms. \Vhen constructed as shown in Figs. 1 and 2, the one used fora support to the seat of the operator is to be substantially of the form shown, said arm consisting of a bent bar of iron or other metal, the inner end of which is secured to one of the sockets B by means of a bolt passing through the projections on said sockets and through the bent arm, said arm extending inward from said bolt to near the body of the socket, where it is provided with a slot, as shown in Fig. 4, in order that the pivoted lever B (shown in Fig. 2) may prevent the arm 13" from turning upon the bolt B when. I
desired, but which will allow it to be turned by pushing it into the position shown in dotted lines, which will allow the arm B to be turned into any position desired without moving the socket. The same swinging movement may be made by removing the pin or pins B. To the outer end of the arm 13 there is attached a horizontallysliding seat rest, B, whlch is attached to the arm B by means of staples or sockets B, and is so arranged that it can slide horizontally, in order that it and the horizontally and vertically adjustable seat I B which it carries, may be placed at the de sired distance from the patients seat A.
One method of adjusting the seat 13* horizontally is shown in Figs. 1 and 2, it consisting of a shaft, 0, which is secured in bearings on the vertical portion of the arm B, it extending outward therefrom in both directions, as shown in Fig. l, and being bent, as there shown, so as to form convenient foot-rests, and at the same time act as a means of adjusting the seat horizontally, such adjustment being effected by an arm, 0, made fast on the shaft C, and having attached to its outer end a connecting-link, C, the outer end of which is connected to a stud, C, which passes through slots formed in the arm B and the slide B", it 5 being provided with a screw-thread and a nut, G, with a handle upon it for clamping the arm and slide together, and thus holding the seat in its proper position horizontally.
It is evident that since the shaft C is bent to form foot-rests that the operator can, by the pressure of his foot upon these rests, adjust the seat B horizontally through the actions of the various levers and the stud 0, just described.
The vertical adjustment of the seat B may be effected'by means of the mechanism shown in Fig. 1, or it may be done by a screw formed 'on its vertical support in the usual manner. Whenthe device shown in the drawings is employed, the seat is held in its vertically adjusted position by means of a screw, 0
The seat D, which is for the use of the assistant, may be constructed and arranged in the same manner as that above described, or its supporting-arm may be as shown in Fig. 1, it being providedwith the requisite means for effecting its vertical and horizontal adjustnient.
I am'aware that the'individual parts of this novel, and hence I do not claim them, except as they are'combined for the production of the results described or others of a similar character. 7
What I do claim, and desire to secu'reby Letters Patent, is-
1. In a chair for dentists and barbers, the
device, when considered separately, are not combination of a supporting-column, B, the sockets B, revolving upon said column, supporting-arms B pivoted within these sockets by pivots B and capable of being locked by the pivoted levers B", and horizontally and vertically adjustable seats, substantially as and for the purposes set forth.
2. In a chair for the use of dentists and barbers, the combination, with a support-ingcolumn, B, provided with revolving sockets B of bent supporting-bars B, to the outer ends of which are attached by means of sockets B the horizontally-sliding seat-rests B carrying the seats B substantially as shown and described.
3. In a chair for the use of dentists and barbers, the combination of a supporting-column, B, slotted supporting bar B, connected with said column and provided at its extremity with asocket, B through which slides a hori- -zontal seat-rest. '13, provided with stud O, which has nut Gand connecting'link O, the latter'attached to the arm 0, connected with the shaft 0, whereby the seat'B is rendered horizontally adjustable, substantially as shown and described.
4. In a dentists or barbers chair, the combi'nationof the foot-rests O,"arm 0, connectinglink 0*, stud O havin'g nut O slotted bar B,
socket B, and sliding rest B", substantially as and for the purpose described.
In testimony whereof I have affixed my signature in the presence of two witnesses.
JOHN N. FARRAR. Witnesses:
BERNARUELANAGAN, "EM-MIT FLANAGAN.