US1918190A - Swivel chair - Google Patents

Description

y 11, 1933- J. H. MILLER El AL 1,918,190-

SWIVEL CHAIR Filed March 14, 1932 Patented July 11, 19 33 UNITED STATES PATENT OFFICE JOHN H. MILLER, or PLYMOUTH, AND CLIFFORD E. FISH, or neos, INDIANA SWIVEL CHAIR Application. filed March 14, 1932. Serial No. 598,686.

This invention relates to a seat or chair in which the lower section is a fixed base or pedestal with the seat rotatively mounted upon it and arranged to return automatically to a predetermined position when unoccupied. It is designed to be adjustable to face in various directions.

This class of chairs is peculiarily useful for seating along eating counters and around tables in restaurants, and for seating in any place where an inviting and orderly arrangement- .of the seating is of value.

The objects of the improvement are, first to provide a positive and substantial arrangement of parts to fix and hold the chair in regard to its facing direction; second, to provide a device in which the facing direction can he quickly and easily changed; third, to provide a simple and positive returning mechanism; and fourth, to make an article of manufacture that will be efficient and cheap in construction.

The invention is set forth in the following specifications, illustrated in the accompanying drawing, and particularly polnted out in the claims.

In the drawing Fig. 1 is a vertical section from front to back through the center of the chair; Fig. 2 is an enlarged section on the line 2 2, of Fig. 3; Fig. 3 is a plan view looking downward with the seat removed; Fig. 4: is a. transverse section on the line 4L 4, of Fig. 2; Fig. 5 is a modified form on the same line as Fig. 4; Fig. 6 is a fragment of the head of the pedestal in elevation; Fig. 7 is a fragment of the same as Fig. 6, but in the modified form.

In the drawing Fig. 1 illustrates a swivel chair showing the three general elements composing it. The pedestal 1, is affixed to a supporting surface. The returning mechanism designated in a general way as 2, is reinovably and adjustably attached to the top of the pedestal. The seat spider 3, is rotatively mounted upon the returning mechanism 2, and provided with means to return to any position determined by the adjustment of the mechanism 2, carrying the seat 10, afiixed thereto with it. In the enlarged views the operating parts,

bore of the pedestal 1, and is closed at its bottom with a head 2, and at its top with a head 2". The head2, has a stud 4, afiixed to it and extending through an opening in the head 2". The cam 4, is affixed to the top end of the stud 4'. The head 2", is provided with a bearing 11, in the opening in its central 1 area, and provided with serrations 7, around its periphery as best seen in Fig; 4. The ser-' rations 7 fit the lugs 1, and hold the mechanism 2, from any rotary movement relative to the pedestal 1. The spider 3,-has a depending shell stud 3, bored to rotatably fit the-stud 4', and is provided with the bearing 11, making a revoluble contact with the head 2". The spider 3, is provided with a radial frame 3. The plunger 5,'is mounted in the frame 3", and has a cam wheel 5, on its inner end and a spring 5", on its outer end to force the cam wheel 5', against the cam 4. The spring 5", abuts against an outer bar of the frame 3", at its outer end and against a washer held in place by a pin through the plunger 5, at its inner end. The plunger 5, is slotted in its outer portion and a pin in the frame 3", passes through the slot to pre vent the plunger 5, from rotating on its axis.

The spider 3, is attached to the chair seat 10, by bolts through the holes in its radial arms.

A modified form is shown in Fig. 5, and I Fig. 7. Instead of the lugs 1, onthe top of the pedestal 1. it is provided with an annular rim 1", which has on its inside peri hery serrations 8. The head 2, is provide with lugs 9, that fit into the serrations 8, and hold the mechanism from rotation relative to the pedestal.

The operation of the invention is easy and simple. swivel it around to any direction desired by giving a slight push with the feet on the floor or some statitonary object, or by a slight exertion with the hands in contact with some stationary object. when the seat 10, is vacated An occupant of the seat 10, can

the pressure of the spring 5 drives the cam wheel 5, against the cam 4, and returns the spider 3, to the position shown in Fig. 3. To change the facing position of the seat 10, raise the returning mechanism 2, the height of the lugs 1, and turn the seat 10, to the de,, sired position and refit the serrations 7, to the lugs 1, or in the modified form refit the serrations 8, to the lugs 9. The seat will return automatically to the position thus determined. Having described our invention, what we claim is 1. A swivel chair having a hollow pedestal, lugs on the top of the pedestal, a bodyremovably fitted into the pedestal, a head at the top of the body, a'journal bearing formed in an opening in the central area of the head,

. serrations formed around the periphery of the head and fitted to engage the lugs, a closureat the bottom of the body, a stud projecting from the closure through'the opening in the head, a radial cam affixed to the stud, a seat supporting spider, a seat rigidly attached to the "spider, a shell depending from the spider and rotatively fitted to the stud and journaled on its outside to the head, a

frame rigidly attached to the spider, a plungor movably fitted into the frame, a cam wheel mounted on the inner end of the plunger and in operative contact with the cam, a pin in the frame engaging a slot in the outer end of the plunger, an abutment upon the'plunger, and a coil spring around the plunger and bearing against the abutment at one of its ends and bearing against'the frame at its other end.

- 2. In a swivel chair designed to be adjustlected fronting position including a spring :pr'essed member mounted on said chair radial to the axis of rotation thereof and engaging a cam element rigid with the supportmg body.

3. Ina swivel chair designed to be adjust able to various fronting positions and to return to a selected position when vacated, :a hollow pedestal with lugs thereon, an intermediate supporting body with serrations thereon and adjustably fitted to the pedestal by engaging the serrations with the lugs, a

cam rigidly connected to the intermediate body and with its actuating surface radial to the axis of the body, a seat supporting spider journalled to the intermediate body, and a cam wheel yieldingly mounted upon the spider to'yield radially from the axis of the body and in operative contact with actuating cam surface. 7 V

In'witness whereof we have hereunto affixed our signatures.

JOHN H. MILLER. CLIFFORD E. FISH.

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