US727866A - Locking device for chairs or the like. - Google Patents

Description

. VMM/5555.5

No. 727,866. PATENTED MAY'Iz, 1993.

' I. W. WASIIBURN. I LOCKING DEVICE FCR CHAIRS CR THB LIKE.

APPLICATION FILED {A NZMQ, 1902.

NO MODEL.

@CLT/M No. teased Patented May 12, 1903i.

Finca.

ATENT THEODORE W. WASHBURN, OF BALDWINVILLE, MASSACHUSETTS, ASSIGNOR TO GILMAN AIVAI'IF., OF BALDWINVILLE, MASSACHUSETTS. I

LOCKING DEVICE F OR CHAIRS OR THE LIKE.

SPECIFICATION forming' part 0f Letters Ptenb NO. 727,866, dated May 12, 1903. Application led January 9, 1902. Serial No. 88,993. (No model.)

.To all whom t may concern.'

Be it known that I, THEODORE W. WASH- BURN, of Baldwinville, in the Y county of Worcester and State of Massachusetts, have invented an Improved Locking Device for Chairs or the Like, of which the following is a specification.

My invention relates particularly to locking devices for childrens chairs which have a table adapted to rest upon the arms of the chair when in use and adapted to be swung out of the way when not in use; and it consists in adjustable means forlocking the table to the chair.

In the drawings, Figure l is a side view of a chair embodying my invention. Fig. 2 is a front View, partly in section. elevation; and Fig. 4 is a section on line 4 4, showing my new adjustable guide-plate.

A is a chair having arms a,which ane grooved at a. l

B is a table attached to rods b, pivotedV at b.

D is a spring-wire attached to the table by staples d.

F is a guide-plate slotted at'f for spring D,

and its upper portion f fits the rod b and has` a slot f2, which enables the guide to be attached to the rod in the desired position by a screw f3, as shown. The slot f receives the end of the spring D and guidesthe spring into proper engagement with groove a in arm a. When the table is brought to place,

the end of the spring D snaps over the. end4 of arm a into engagement with the groove a', the guide-plate F insuring such engagement. The relation between the arms a ofthe chair and the spring D, carried bythe table B when the rods b are connected by their pivots b to the chair A, must be such that the ends of the spring D will press against the bottoms Fig. 3 is anofthe grooves a', and this is a matter of oo nlparatively nice adjustment; but that nice adjustment is readily attained by the proper adjustment of my guide-plate F, whichcan vbe brought into proper position to so hold the end of spring Drthat it will snap on the end of arm a into groove ct as the tableB is swung into place. Moreover, the curve of rods b is apt to vary slightly not only in Vdiderent tables of the same lot, but also any rod is liable to become slightly less curved from lapse of time lor from use, and the guide-plate F then requires readjustment.

Heretofore the only guide :fore the end of I spring B has been a staple driven intof-the under side of rod b, and I am the first, so far as I have any,reason to believe, to use a guideslot in a plate adjustably securedto rod b.

. What I claim asmy invention is- In eombinationa chair; its arms grooved at their outer ends; a table swinging on rods pivoted'to the chair and resting on the arms of the chair; a spring-rod carried bythe table l andengagingthe grooves in the outer ends of thearmsbf the chair5'aguide-plate whose *upper portion isshaped to it the pivoted rod of the table and slotted for adjustment parallel with the rod, and whose lower portion has a slot parallel with the adjusting-slot to receive the end of the spring-rod, and hold -that rod in proper relation with the groove in the outer end of the arm of the chair; and

ascrew through the upper slot of the guide-V THEoDoRE w. wAsHBURN. Y

Witnesses:

J. F. WINCH, E. C. WHEELER.

Images