US939623A

US939623A - Extension-arm for chairs.

Info

Publication number: US939623A
Application number: US43664608A
Authority: US
Inventors: Floyd E Payne; Milus M House
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-06-04
Filing date: 1908-06-04
Publication date: 1909-11-09
Anticipated expiration: 1926-11-09

Description

F. E. PAYNE & M. M. HOUSE.

EXTENSION ARM FOR CHAIRS.

APPLIOATION FILED JUNE 4, mos.

Patented'Nov. 9, 1 909.

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INVENTORS Floyd E. Payne. Milus M, House.

WITNESSES: V

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EXTENSION ARM FOR GHAIBS. APPLICATION FILED JUNE 4, 1908.

Patented Nov. 9, 1909.

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uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu c UNITED STATES PATENT OFFICE.

FLOYD E. PAYNE AND MILUS M. HOUSE, OF INDIANAPOLIS, INDIANA.

EXTENSION-ARM FOR CHAIRS.

Specification of Letters Patent.

Patented Nov. 9, 1909.

To all whom it may concern:

Be it known that we, FLOYD E. PAYNE and MILUS M. HOUSE, of Indianapolis, county of Marion, and State of Indiana, have invented a certain new and useful Extension-Arm for Chairs; and we do hereby declare that the following is a full, clear,

and exact description thereof, reference beed in connection therewith, and preferably under the stationary arm, in such manner that the movable arm can be adjusted longis tudinally of the stationary arm so as to practically increase the length of the widened arms, or be turned laterally in front of the occupant of the chair so that the two arms will be at right angles to eachother.

Another feature of the invention consists in the means substantially set forth for guid ing and holding said movable arm so that the structure will be of a durable character and easil manipulated.

The fu 1 nature of this invention will be understood from the accompanying drawings and the following description and claims.

In the drawings Figure 1 is a perspective view of a chair provided with our invention, the legs of the chair being partly broken away. Fig. 2 is a front elevation of the left hand portion of the chair, showing the widened arms, other parts of the chair being broken away. Fig. 3 is a plan view of the widened arms with the movable arm telescoped outwardly, parts being broken away, it being a horizontal section on the line 3-3 of Flg. 2, the obscured parts being shown by dotted lines. Fig. 4 is a view similar to that in Fig. 3 with the movable arms turned laterally. Fig. 5 is a section similar to that of Fig. 3 but on the under dicated by dotted lines.

side ofthe widened arms, the movable arm being in its normal position, and the guide way in the stationary arm being partially in- Fig. 6 is the same as Fig. 5 with the movable arm turned laterally. Fig. 7 is a section on the line 77 of Fig. 5 but wit-h the parts inverted as compared with Fig. 5 but both in their normal position. Fig. 8 is a section on the line 88 of Fig. 5, likewise inverted but all the parts in a normal position. Fig. 9 is a horizontal section on the line 9-9 of Fig. 8. Fig. 10 is a vertical section on the line 1010 of Fig. 5. Fig. 11 is a section on the line 1111 of Fig. 10. Fig. 12 is a section on the line 1212 of Fig. 10.

The construction herein shown to illustrate our invention consists'of a chair 10 having back posts 11 and front posts 12 and back bars 110 of ordinarytype.

A stationary widened arm 13' is rigidly secured to the back post 11 and at the front end to the front post 12, the latter connection being established by the metal bar 14 which extends diagonally under the arm, as

shown in Fig. 5, and has, nearly midway its ends, an outwardly extending sleeve 15 that is rigidly secured to the upper end of the front post 12 by the pin 16. The bar 14 at each end has an upwardly extending portion 17 which is secured to the lateral edge of the stationary arm, as shown in Figs. 1 and 2.

The bar 14 1s spaced away'from the stationary arm 13, as seen in Fig. 2, to permit the movable arm 18 to lie and operate between them. The

arms

13 and 18 are herein shown to be of the same dimensions and means as hereinafter described are provided to enable the arm 18 tobe extended forwardly to the position shown in Fig. 3, and, if desired, to be turned'laterally to the position shown in Fig. 4. In the latter position the arm 18 would be in front of the occupant of the chair. This renders the chair very serviceable for various purposes in lunch rooms, libraries and homes.

The movable'widened arm.18 is telescoped outwardly and inwardly to and from the position shown in Fig. 3 by reason of the following construction. There is a longitudinally extending groove or way 20 in the un-' der side of the arm 18 which extends from the small end thereof toward the front end, as appears in Figs. 6 and 10. Within said groove there is a guide-bar 21 secured along the bottom and side surfaces. The bar 21 is grooved longitudinally, as appears in Fig. 10, for the engagement of anti-friction balls 22 which are held by the cup 23 that has an outwardly extending stem 24C externally threaded to screw through the bottom of another ball cup 25 below. The ball cup 25 is externally threaded to be secured in the ring 26 that is internally threaded and secured to the sleeve 15. Within the cup 25 there are balls 27 on which the cup 23 rests. A nut 28 on the lower end of the stem 24 holds the cup 23 from escaping from the cup 25. The cup 25 is stationary but the cup 23 can turn or oscillate on the balls 27 and the guide 21 can move longitudinally of the cup 23 between the balls 22, and thus the arm 18 be drawn forwardly or pushed backwardly. In this forward and backward movement of the arm 18 it is guided at its rear end by the means shown in Fig. 6. There a groove 30 is provided in the underside of the stationary arm 13, that is much like the groove 20 in the movable arm and it has within it a guide-bar 31 of the same form in cross-section as the guide-bar 21, and it is otherwise the same excepting that the guide-bar 31 in the groove 30 is stationary while the guidebar 21 is longitudinally movable with the movable arm 18. In the rear end of the movable arm 18 there is a hole 32 vertically through it and a ring 33 is secured within the upper partof said hole to said arm 18. The ring is internally threaded so the ball cup 3st can be secured to it. This ball cup carries balls 35 which engage the bottom of the ball cup 36 above that projects into the groove 30 of the stationary arm 13 and which contains balls 37 adapted to engage the bottom and sides of the guide-bar 31 which is grooved for that purpose. The cup 36 has a downwardly extending stem which projects through the bottom of the cup 34 and has on its lower end a nut 38. A removable plate 39 closes the bottom of the hole 32. The construction just described and shown in Fig. 8 is such that the lower arm 18 can be easily moved longitudinally of the upper arm and guideway 31, and in such movement the balls 37 will roll and the cup 36 travel along the guide-bar 31 and the inwardly to and from the position shown in Fig. 3, If it be desired that the arm 18 have also the capacity of lateral movement so as to be in front of the occupant: of the chair, it is necessary that the groove 30 and guide-bar 31 on the under side of the stationary arm 13 be curved at its forward end, as shown in Fig. (3, said curved portion thereof being concentric with a vertical line through the post12 of the chair and the bearings above the same. as shown in Fig. 10. Therefore. after the movable arm 18 has been drawn forwardly until the balls 37 and cup 36, in Fig. 8, and carried by the lower arm 18, come to the beginning of the curved portion of the guide-bar 31. said arm 18 can be turned laterally. as indicated in Fig. 6, and during such lateral movement of the arm the bearing carri d thereby. as shown in Fig. 8, travels along the curved portion of the guide-bar 31 to the end thereof.

During the movements of the movable arm 18 its upper surface is out of contact with the arm 13 above so that the moven'ient may be easy and finish on the lower leaf be uninjured. This arises from the gravity of the plate 18 and the vertical adjustment of the balls and cups in the bearings.

In order to tighten the bearings for the guides so the movable arm can have no lateral play, we provide a screw 100 that projects upwardly through the stem 2-1: of the cup 23 and the stem of the cup 36 with its concave upper end engaging and bearing upwardly against the lower balls and 37. lVhen said screw is tightened up, it will force the guide 21 or 31 upwardly in engagement with the lateral balls 22 or 37 to make the sets of balls 22 and 37 very tightly engage the guides 21 and 31.

The means for locking the movement of the arm in any desired position. consists here in ofa crank or handle -l-0 securedtothe outer end of the shaft l1 that extends horizontally through a portion of the stationary arm 13. as seen in Fig. 10, to a point beyond the recess +l-2 in the under side of said arm 13. \Vithin said recess a cam telis secured rigidly to the rod 41 with lateral, flanges thereon that engage correspondinglateral grooves in the top of said block 415, whereby the cam will elevate and depress said block. A. friction disk -17 made of rubber or other yielding material is secured to the under side of the block and adapted to engage the upper surface of the lower arm 18 above and in vertical alineinent with the bearings therefor, as shown in Fig. 10, and the front post 12 of the chair. Therefore, when the crank 40 is turned in one direction the look ing disk 47 will be forced down tightly upon the arm 18 and hold it from moving. \Vhen the crank 4-0 is turned in the opposite direction said holding means will be released.

The invention is not limited to the details of the construction herein set forth for various features thereof could be altered in a manner that would occur to the ordinary mechanic without departing from the spirit of the invention.

hat we claim as our invention and desire to secure by Letters Patent is:

1. A chair including a stationary widened arm, a cross bar mounted on the front post of the chair with its two ends secured to said stationary arm and spaced from said arm, a movable widened arm mounted between said stationary arm and cross bar, and means for guiding and holdin said movable arm.

2. A chair including a stationary widened arm, a bar secured upon the front post of the chair under said arm and secured at its ends to the edges of said arm and spaced from said arm, a movable widened arm located between said stationary arm and cross bar, a longitudinal guide on the under side of said movable arm, bearings mounted on said cross-bar for said guide that permits the movable arm to be moved longitudinally, -a longitudinal guide in the under side of said stationary arm, and a bearing connected with the inner end of said movable arm that engages and travels along said guide.

3. A chair including a stationary widened arm, a transverse bar mounted on the front post of the chair with its ends secured to said arm and said arm spaced from said bar, a movable widened arm mounted between said stationary arm and said bar, a bearing for said movable arm that is mounted on said bar and arranged to permit said movable arm to move laterally, a guide on the under side of said stationary arm that is curved concentrically with said bearing, and a bearing extending from the end of said movable arm in movable engagement with the guide on the stationary arm whereby the movable arm can be moved laterally in connection with the stationary arm.

at. A chair including a stationary widened arm, a cross-bar mounted upon the front post of the chair with its ends secured to the edges of said arm and spaced therefrom, a movable arm between said stationary arm and bar, a bearing for said movable arm that is mounted on said bar and arranged to permit the movable arm to move longitudinally and laterally, a guide on the under side of said stationary arm that has a longitudinal portion and another portion curved concentrically with said bearing, and means'extending from said movable arm into movable engagement with the guide on the stationary arm whereby the movable arm may be moved longitudinally and then laterally.

5. A chair including a stationary arm, a movable widened arm, means for supporting the forward end of the stationary arm, a guide connected with said movable arm having lateral grooves therein, a bearing c011- nected with said support and projecting astride said guide and engaging-the arm in said grooves, whereby said arm will not only be movable but the vertical relationship between the arms be maintained.

6. A chair including a stationary arm, a movable widened arm, means for support-ing the forward end of the stationary arm, a guide connected with said movable arm having lateral grooves therein, a bearing cup secured to said supporting means and projecting astride said guide, and balls in said cup that engage said guide in the grooves thereof.

7 A chair including a stationary arm, a movable widened arm, means for supporting the forward end of the stationary arm, a guide connected with said movable arm having lateral grooves therein, a bearing connected with said support and projecting astride said guide and engaging the arm in said grooves, and a second bearing secured to said stationary arm in which said first mentioned bearing is laterally mounted, whereby the bearings will permit said movable arm to have both longitudinal and oscillatory movements.

8. A chair including a stationary widened arm, means for supporting the same, a movable widened arm, a guide secured to said stationary arm with longitudinal grooves in the sides thereof, and a bearing secured to the movable arm that projects astride the guide in said stationary arm and engages the same in the grooves thereof, whereby the movable arm may be guided in its move ment and maintained in proper vertical relationship with said stationary arm.

9. A chair including a stationary widened arm, means for supporting the same, a movable widened arm, a guide secured to the stationary arm a portion of which is longitudinal thereto and a portion curved, a bearing cup secured to the movable arm that projects astride the guide on the stationary arm, balls in said bearing cup that engage said guide, and another bearing on which said bearing cup is rotatably mounted, whereby the bearing construction in connection with said movable arm can travel along both the straight and curved portions of said guide.

10. A chair includingastationary widened arm, a bar secured upon the front post of the chair under said arm and secured at its ends to the edges of said arm and spaced from said arm, a movable widened arm located bet-ween said stationary arm and cross bar, a longitudinal guide on the under side of said movable arm, and bearings mounted on ing the forward end of the stationary arm, a guide for guidlng the movement or sold movable arm which guide has a groove in the bottom and on each side thereof, a hearsaid balls in their engagement with said guide.

In Witness whereof, We have hereunto aflixed our signatures in the presence of the Witnesses herein named.

FLOYD E. PAYNE. MILUS M. HOUSE. lVitnesses O. M. GREENER, J. H. SWAN.