US1728025A - Headrest - Google Patents

Description

Sept. 10, 1929.

H. E. WEBER 1,728,025

HEADRES'I 4 Sheets-Sheet 1 Filed June 25. 1927 Henry E Wkber H. E. WEBER Sept. 10, 1929.

HEADREST 4 Sheets-Sheet 2 Filed June 25. 1927 gwvwto'z Henry E. I Vebe'r H. E. WEBER Sept. 10, 1929.

HEADREST Filed June 25, 1927 4 Sheets-Sheet 3 Hell/y E." l l ebel" Sept. 10, 1929. WEBER I 1,728,025

HEADREST Filed June 25. 1927 4 Sheets-Sheet 4 Patented Sept. 10, 1929 UNITED STATES HENRY E. WEBER, OF CANTON, OHIO .HEADREST Application fi led June 25,

The invention relates to head rests for dental chairs and the like; and the object of the improvement is to provide a head rest in which the rest pads may be turned upon an axis passing through the centers of the rest surfaces of the pads, thus permitting the rest pads to be adjusted without materially changing the position of the patients head; and to provide a clamping means whereby the bracket carrying the rest pads and the arm supporting this bracket are both'clamped in adjusted position by a single action of the clamping means.

The above and other objects may be attained by constructing the head rest in the manner illustrated in the accompanying drawings, in which Figure 1 is a rear elevation of the improved head rest;

Fig. 2, a side elevation of the same Fig. 3, a sectional view through the clamping arm which supports the head rest bracket;

Fig. 4, a section through one of the rest pads;

Fig. 5, a plan view of a portion of the leather cover of the rest pad;

Fig. 6, a perspective View of this leather cover, substantially in the position it assumes when placed upon the'rest pad;

Fig. 7, a plan view of the soft, rubber cushion of the rest pad;

Fig. 8, a plan View of the disk frame of the rest pad, and

Fig. the plan view of the rubber ring by 35 means of which the cover is clamped in position upon the rest pad.

Similar numerals indicate corresponding parts throughout the drawings.

A pair of ears 1 may be formed upon any eo' stationary portion of the chair and a short shaft 2 is fixed therein as by the pins 3 for the purpose of supporting the clamping arm 4 upon which the improved head rest is carried.

' This clamping arm is provided at its lower end with the bearing portion 5 journaled upon the shaft 2, and at its upper end with a similar bearing portion 6 within which is journaled a short shaft 7.

As illustrated in Figs. 2 and 3, the clamping arm is split longitudinally as shown at 8,

1927. Serial No. 201,435.

from the bearing portion 5 to the bearing por-' tion 6 and at a point substantially half-way between these bearing portions the arm is out transversely through at one side of the longitudinal central cut, as shown at 9. I

As this arm is preferably formed from a malleable casting or the like, the two portions 10 thereof, separated by the transverse cut 9, will have a certain amount of resilience and will tend to assume their natural or nor-.

mal position as indicated in Fig. 3. To prevent these port-ions from moving beyond this point, a screw 12 may be located througha suitable bore at 13 near the free end of'each portion 10 and threaded into the solid por tion 14 of the arm.

A bolt 15 is threaded transversely through the center of the solid portion 14 of the arm and may be provided with the nut 16 at its outer end. This screw has a head 11'' located in a bore 18 formed in the free ends of the portions 10 and is provided with a flattened extremitylE) upon which is slidably mounted a collar 20 arranged to be engaged by the cam 21 of the lever 22 which is pivoted as shown at 23 upon the flattened extremity 19 of the bolt 15.

It will be seen that when the cam lever 22,

is moved into the position shown in 2 the collar 20 will be forced inward against the free ends of the portions 10 of the arm, bend-j ing said portions inward toward the solid portion 14 and tightening the bearing portrons 5. and 6 upon the arm around the short shafts 2 and 7 respectively, clamping these shafts against movement in the bearings.

The bracket 24, which carries the rest pads.

is provided at its lower end with the ears25 fixed upon the shaft 7 as by the pins 26. Thus when the cam lever 22is tightened the arm 4 may be held clamped in any desired adjusted position and also the bracket 24' is clamped in any desiredadjustment. I

A yoke 27 is formed upon the upper end of the bracket 24%, each free end thereof terminating in a boss 28 having a countersunk bore 29 in alignment with a similar bore in the other ear. c g

The rest pads 30 are stat onarily attached to the curved frame 31 whic'hisenlarged at ceived in the annular groove 50 formed in t each end as at 32 and provided with a tapped bore 33 to receive the screw 34 which is journaled in the adjacent boss 28. A washer 35 may be located around this screw between each boss and the adjacent end of the curved rest pad frame in order that the frame may be easily turned upon its pivots.

As best shown in Fig. 1 of the drawings, a line passing through the axes upon which the frame 31 is journaled passes through the center of the rest surface of each pad 30; Thus the frame 31 may be turned in a corn plete revolution upon its axis without chang-' is formed in the inner face thereof while the central bore 39, formed in the boss 40, is threaded to receive the attaching screw il as will be later described. r

A rubbercushion in the form of a disk having the annular rib 4:3, is placed upon theouter side of the disk frame 36, the rib 43 being seated in the annular peripheral groove 37 of the frame. v V

This cushion is covered with a sheet of leather or the like indicated at let which is substantially circular and provided with the V notches 15 at regular intervals around its peripheral portion, forming the spaced radially disposed ears 48 around the leather cover.

Each of these ears is arranged to be folded upon the dotted lines 47 and 48 and each ear thus folded is laid around the peripheral edge and over the back of the disk frame 36, ex-

tending through the, annular groove 38 upon the rear sideof the frame.

The resilient toroidal ring 49, preferably of rubber, is then placed overthe ears and readjacent pad portion disk 51 of the frame 31 and the attaching screw 41 1s passed through this pad portion 51 of the frame and screwed into the tapped bore 39 of the disk frame 36, drawing the diskframe toward the pad portion 51 and by means of the ring 49 compressing the ears 46 of the leather cover into the annular groove 38 of the disk frame.

A serviceable and efficient rest pad is thus provided which is composed of a minimum number of parts of simple construction easily and readily assembled or taken apart and dispensing with the usual lacing and other complicated construction ordinarily present in rest pad construction,

It will be obvious from the above description and an inspection of the accompanying drawings that a head rest is provided which is of simple construction and easily operated and wherein by a single clamping action the arm and bracket of the head rest are both simultaneously clamped in any desired adjusted position; that the rest pads are so arranged that they may be turned to any desired position without changing the location of the center ofeach pad; and that the construction of each rest pad is novel and simple and permits of easy assembling and taking apart of the pads.

I claim:

1. In a head rest a rest pad including a disk frame, a disk cushion upon one side of the frame, a covering for the cushion provided with ears extended over the back of the disk frame, a resilient toroidal ring arranged to engage said ears and means including a disk and a screw for drawing the ring toward the disk frame to clamp the ears between the ring .and frame.

2. In a head rest a rest pad including a disk frame having an annular groove upon one side, a disk cushion having an annular rib seated in said groove, a covering for the cushion provided with ears extended over the other side of the disk frame, a resilient toroi dal ring arranged to engage said ears and means including a disk and a screw for drawing the ring toward the disk frame to clamp the ears between the ring and frame.

3. In a head rest a rest pad including a disk frame havinga peripheral groove in its front face, a d sk cushion having a peripheral rib for seating in said groove, said frame having a concentric groove upon its rear face, a covering for the cushionprovided with ears extended over the rear of the disk frame and into said concentric groove, a resilient toroidal ring arranged to engage said ears and means including a disk and a screw for drawing the ring toward the disk frame to clamp the ears in said concentric groove between the ringand frame. 1

In testimony that I claim the above, I have I hereunto subscribed my name.

' HENRY ELVVEBER,

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