US1168071A - Barber's chair. - Google Patents

Description

W. S. HOLZBAUR.

BARBERS CHAIR. APPLICATION FILED SEPT. 14. 1914.

Pafented Jam 11, 1916.

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BARBERS CHAIR.

APPLICATION HLED. SEPT. 14, 1914.

1,168,Q71, Patented Jan. 11, 1916.-

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BARBER/S CHAIR.

To all whom it may concern Be it known that I, WALTER S. HOLZBAUR, a citizen of the United States, residing at hite Horse, Hamilton township, in the county of Mercer and State of New Jersey, have invented certain new and useful Improvements in Barbers Chairs, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to an adjustable chair of that character generally employed by barbers and dentists, and has for its primary object to provide improved means for locking the leg and foot rest and the back of the chair in their adjusted positions with relation to the chair seat.

The invention has for a further object to provide an extremely simple and effective locking device arranged beneath the seat of the-chair to securely hold the chair parts in their adjusted positions, and an operative lever connected to said locking means to release the same.

The invention has for a more specific obof a rack bar connected to the leg rest of the chair and slidably mounted beneath the chair seat, a single spring held lever mounted upon the rotatable frame of the chair and cooperating with said rack bar to lock the same against slidingmovement, and a manually operable lever mounted upon the seat base of the chair and connected to said spring held lever to actuate the same and release the rack The invention has for a further general object to materially simplify the construction and increase the durability of devices of the above character whereby the manufacturing cost of adjustable chairs is reduced to a minimum.

With the above and other objects in view as will become apparent as the description proceeds, the invention consists in certain constructions, combinations and arrangements of the parts that I shall hereinafter fully describe and claim.

For a full understanding of the invention, reference is to scription and accompanying drawings, in

Figure 1 is a justable chair with the present perspective view ofan adconstructed in accordance invention; Fig. 2 is a ver- 3 is a planvieW, the chair Specification of Letters Patent.

' and is formed with bracket the forward ends of the be hadto the following de- 'nected Patented J an. 11, 1916 Serial No. 861,675.

7 is secured. This bearing plate is formed with a central upstanding cylindrical stud or boss 8.

9 indicates theinverted bearing cup or plate which is opposed to the bearing plate a central opening to receive the cylindrical boss 8. This inverted bearing cup is retained in position by means of a cap plate 10, which is secured to the boss 8 by the screws indicated at 11. Between the opposed bearing plates 7 and 9 a series of bearing balls 12 are arranged.

The seat frame 13 is secured in any suitable manner upon the rotatable bearing plate 9. -This seat frame as clearly shown in Fig. 3 consists of an outer marginal wall 14 which is connected to the bearing plate 9 by diametrically opposed radial arms 15. In practice, these arms are preferably formed integral with the bearing plate.

pon the inwardly projecting flange of the marginal wall 14 of the seat frame, at the rear thereof, and upon opposite sides of the frame, cured. The chair back indicated at 17 is pivotally mounted between and upon these plates. To the forward edge of the marginal wall 14 of the seat frame and at each side thereof, upwardly projecting brackets 18 are secured upon which the side bars 19 of a combined leg rest and foot support are fulcrumed. hese bars project above the brackets 18 and upon the same, arm rests 20 are pivotally mounted, the, rear ends of these arm rests being pivotally connected as at 21 to opposite sides of the chair back 17 adjacent the brackets 16 upon which said chair back is mounted.

The side bars 19 of the leg rest are conat a point slightly below the brackets 18 upon which said bars are mounted, by a horizontal rod 22'. diverging arms 23 of a Y shaped bar are loosely mounted at their extremities upon said rod adjacent its ends. These arms 23 extend inwardly-from the bracket plates 16 are se-v foot rest of the side bars 19 of the leg rest over the seat frame of the chair, the central arm 2 1 of said Y shaped bar being disposed in line with the axis of the chair pedestal upon which the chair body is rotatably mounted. To this central arm 2t of the bar, the forward end of a slidable bar 25 is secured. This latter bar is movable in a guide loop or sleeve 26 which is fixed upon the seat frame 13, and has a series of rack teeth 27 formed in one of its longitudinal edges. Upon the upper surface of the bearing plate 9, a bell crank lever 28 is fulcrumed as at 29 upon one side and slightly to the rear of the chair pedestal 5. One arm of this lever has a lug 30 formed upon its extremity for engagement with the rack teeth 27 of the bar 25. To the other arm of said bell crank lever, one end of a coil spring 31 is connected, the other end of said spring being suitably secured to the seat frame 13. This spring normally acts to hold the lug 30 of the lever yieldingly in looking engagement with the rack teeth of the bar 25.

A horizontally disposed rod 32 is rotatably mounted in suitable bearings 33 formed uponthe under side of the seat frame 13 and is equipped upon its outer end with a handle 3%. Upon this rod, an arm 35 is secured, said arm being provided with a collar upon one end in which a set screw 36 is threaded whereby the arm may be adjustably secured upon said rod. This arm it will be observed extends from the collar upon one side of the rod 32 and is curved and reversely extended upwardly and rearwardly over one of the arms 15 of the seat frame 13. One end of a rod 37 is connected to this rearwardly projecting end of the curved arm 35. Said rod loosely extends through an opening in the arm of the lever 28 to which the spring 31 is connected, and a nut 38 is threaded upon said rod for engagement with the lever arm.

From the foregoing description taken in connection with the accompanying drawings, it is believed that the construction, manner of operation and several advantages of my improved adjustable chair may be clearly and fully understood. In order to adjust the chair back and leg and foot rest with respect to the seat, the operator grasps the handle 3% and pushes the same forwardly toward the front of the chair, thereby rotating the rod 32. In this rotation o the rod, the upper end of the arm 35 is moved forwardly of the axis of said rod and through the medium of the rod 37 and nut 38 thereon, the bell crank lever 28 is oscillated, upon its fulcrum, to disengage the lug 30 of said lever from the teeth 27 on the bar 25. The chair back may then be tilted to any desired inclined position,

course being extended forwardly and upwardly in such tilting movement of the chair back. The Y shaped bar 23 being connected to the rod 22 extending between the side bars of the leg rest, it will of course be obvious that the bar 25 will be drawn forwardly through the guide loop 26. Upon the release of pressure on the handle 34f, the spring 31 acts to immediately return the bell crank lever 28 and the arm 35 to their normal positions, so that the lug of the bell crank lever is the teeth of the bar 25 and said bar securely locked against further sliding movement. Thus the adjustable parts of the chair are positively held in their adjusted positions.

It will be noted that the pull or strain upon the bar 25 is in a horizontal plane, and the locking lever 28 is also mounted for movement in a horizontal position. Therefore, the pressure of the bar against the arm of said lever instead of urging the lever arm outwardly to its released position, acts to create a greater frictional bearing pressure of-the lug on the end of the arm against the rack teeth, thus obviating the accidental or unintentional release of the bar 25 by a suddenly applied and excessive pressure upon the foot rest.

From the above it will be seen that I have devised a very simple and efiicient locking device for adjustable barber's or dentists chairs which is not liable to get out of order, is extremely strong and durable in practical use and may be embodied in a chair structure at comparatively small cost. Access may be readily had to the several elements employe by simply removing the seat cushion indicated at 39, in order that accumulations of dust and dirt may be removed. The leg rest again engaged with is of the usual form employed in such chairs,

while the foot rest 40is of the non-adjustable type and is permanently secured upon the forwardly projecting base portion of the leg rest. It is to be understood, however, that while I have above described a particular mounting of the seat frame and the adjustable parts of the chair, my improved locking device is also applicable to various other constructions of such chairs, and I do not therefore desire to be limited to such mounting of the parts of the chair body in putting the invention into practical use. I also reserve the privilege of resorting to all other legitimate modifications in the form, proportion and arrangement of the several parts as may be fairly embodied within the spirit andscope of the appended claims.

Having thus described the invention, what is claimed is:

1. In a barbers chair, the combination with a pedestal, of a seat frame rotatably mounted on said pedestal, a chair back pivotally mounted upon said seat frame, a leg restpivotally mounted on the seat frame, an arm rest pivotally connected to said back and leg rest, a Y shaped frame having its 1 cured to the extension shaft bearing therein,

outer end connected to the leg rest portion and its inner end formed With an extension, a guide on the seat frame, a horizontally disposed rack bar having one end guidedand retained by said guide and its other end seof the Y shaped lever pivoted to the seat frame in horizontal relation to the said rack bar, one arm of said lever constructed to engage the rack, a spring having one end connected to the seat frame and the other end secured to the other arm of said lever, a rod having one end adjustably connected to said arm near the connection of the spring, a segment shaped vertically disposed curved arm having its upper end connected to said rod and a right angled shaped hand lever pivoted to the seat frame, having its horizontal limb connected to the loWer end of said curved arm and having its vertical limb formed With a handle arranged practically under one of the arm rests and protected from contact thereby and in easy reach of the hand of the operator.

2. In a barbers chair, the combination with a pedestal, a circular support mounted upon said pedestal provided With a centrally disposed vertical stud, a circular turn table mounted on said stud and capable of rotation thereon, a series of arms projecting laterally from said turn table, a lug formed on one of said arms and having a circular a lug formed on one frame, a bell crank of the other arms guiding opening therein, a rack bar guided horizontally in said opening, an arm connected to the other end of said rack bar, a leg section pivotally connected With said arm, arm and back rests connected in proper relation, a yoke shaped seat frame to Which the back and arm rests are adjustably connected, said seat frame being secured to the arms of the turn table, a bell crank lever fulcrumed at its corner to the turn table and having one arm engaging said rack bar, a spring'connected to the seat frame andto the other arm of said lever upon one side of said arm, an adjustable rod leading from the end of the last named arm of said lever, a curved vertically disposed arm secured to said adjustable connection, a rod mounted in the circular shaft bearing upon the arm of the turn tableand having said circular arm mounted upon its inner end, and a vertical terminal formed on said rod and carrying a handle for operating said rod, said handle and rod being disposed at one side of the chair and practically under one of the arm rests of the chair.

In testimony whereof I hereunto aflix my signature in the presence of two Witnesses.

WALTER S. HOLZBAUR.

Witnesses:

ANNA RoBINsoN, WALTER D. CoUGLE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

and having an angular

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