US805696A

US805696A - Extension-table lock.

Info

Publication number: US805696A
Application number: US24922305A
Authority: US
Inventors: John L Arnold
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-03-09
Filing date: 1905-03-09
Publication date: 1905-11-28
Anticipated expiration: 1922-11-28

Description

PATENTED NOV. 28, 1905.

- J. L. ARNOLD.

EXTENSION TABLE LOOK.

APPLICATION FILED NAILS, 190E).

ATTORNEY UNITED STATES PATENT OFFICE.

EXTENSION-TABLE LOCK- Specification of Letters Patent.

Patented Nov. 28, 1905.

Application filed March 9, 1905. $eria1No. 249,223.

T0 011% whom it may concern:

Be it known thatI, JOHN L. ARNOLD, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented a new and useful Extension-Table object is attained by the construction, mechanism, and arrangement illustrated in the accompanylng drawings, in wh1ch- Figure 1 1s a perspective view of the table,

showing the ends extended, Fig. 2, a detached perspective view of one pedestal part, showing the lock applied thereto; Fig. 3, an under plan view of the center leg and pedestal parts slightly separated, illustrating the operation of the lock; Fig. 4:, a section of the lower end of the pedestal as closed, showing the pedestallegs and the center leg; and Fig. 5, an enlarged section of the lower end of the pedestal as closed, omitting the pedestal-legs and the center leg.

Similar numerals refer to similar parts throughout the drawings.

The table which is used to illustrate the lock comprises the top halves 1 and 1, with the end slides2 attached thereto, the center leg 3, with the cross-bar 4 and the neutral slides 2 attached thereto, the intermediate slides 2 having the ordinary tongue 5 and groove 6 connections with the end and neutral slides, and the

pedestal parts

7 and 7 with the pedestallegs 8 attached thereto, the same being attached to the top halves on the under side of the end slides by means of the ordinary bridging or plates, as 9. The locking parts comprise the fingers 10, the links 11, the crosshead 12, the shank 13, the handle 14, and the toothed segment 15, all mounted on one pedestal part, and the posts 16 on the other pedestal part.

In the type of table shown the slide connections are usually somewhat loose, and there is generally some spring in the connection be-. tween the pedestal parts and the top halves, so that when the divided parts are brought together the top halves will come together first, and the lower ends of the divided pedestal tend to spread apart because of the difference in the vertical length of the center leg and the pedestal-legs. For this reason and also to avoid any special shaping or construction of the center leg I prefer to locate the lock proper on the lower end of the pedestal, and, as shown, the fingers 10 are pivot ally mounted on the bottom of the pedestal part 7 preferably on the shanks of the largeheaded screws 17, the same being vertically located one on each side of the median line of the table, so that the fingers will at all times pass freely on each side of the caster 18 of the center leg. One end 19 of each finger is curved laterally outward, and the curved part is projected beyond the inner face of the pedestal part, so that it will extend for some distance under the bottom of the pedestal part 7 a when the table parts are brought together, and to the other end of each finger is pivotally attached the end of one of the links 11. The other ends of the links are pivotally attached to the ends of the cross-head 12, which in turn is mounted on the lower end of the shank 13. The shank 13 extends upward through the

apertures

20 and 20 in the pedestal part to a point 21 just above the pedestal-plate, from which point the handle 14: extends horizontally outward and is adapted to be engaged in the notches 22 of the toothed segment 15, which is mounted on the pedestal-plate. For simplicity in construction and convenience in assembling the parts the shank and handle are preferably made of a single square rod of iron bent to a right angle at 21, and the shank is then entered from above through the apertures in the pedestal part and into and through the square aperture 23 in the middle of the cross-head. It is also preferable to provide the washer 2 L around the shank on the upper side of the pedestal-plate to receive the wear of the rotation of the shank and the handle.

The posts 16 are vertically located sidewise apart, one on each side of the median line of the table, and are preferably made of largehe aded screws so set that the fingers of the lock can operate against the shanks of the screws between the bottom of the pedestal part and the heads of the screws, and the posts are so spaced apart that when the curvedout ends of the fingers are rotated inward, as shown by full lines in Fig. 3, they will pass freely inside of the posts, but that when they are rotated outward, as shown by broken lines in the same figure, they will operate against IIO the inner sides of the posts, and by reason of their outwardly curved or inclined shape will act as an expanding-wedge to draw the two pedestal parts together.

The operation of the fingers is accomplished by the rotation of the handle, the shank, and the cross-head by means of the connectinglinks. The handle is held in agiven position by engagement in the notches by the toothed segment, and when it is desired to rotate it the handle is lifted or sprung up to free it from the teeth. When the lower ends of the pedestal parts are thus drawn and locked together, the center leg is raised from the floor by the action of the abutting top halves of the table as a fulcrum and the pedestal-legs resting on the floor as a bearing, in which relation of the parts the upper ends of the pedestal parts and the top halves are held close together by the weight of the table. It is evident that the relative location and curvature of the fingers can be changed and the operative connections transposed, so that the fingers will operate against the outer sides of the posts instead of the inner sides thereof, as illustrated and described, without affecting the nature of the invention.

WhatI claim as my invention, and desire to secure by Letters Patent, is I 1. A look for a divided-pedestal extensiontable comprising two posts spaced apart on one pedestal part, a rotatable shank having a cross-head on the other pedestal part, two fingers pivoted on the same part on opposite sides of the shank with links connecting the adjacent ends of the fingers and cross-head,

the freeends of the fingers being curved laterally outward and being adapted to operate against the inner sides of the posts when the pedestal parts are approximately closed, and means for stopping the shank against rotation.

2. A lock for a divided-pedestal extensiontable comprising two vertical posts spaced sidewise apart on one pedestal part, a rotatable shank on the other pedestal part, two fingers pivoted on the same part with operative connections between the shank and the fingers, the ends of the fingers being curved laterally outward and being adapted to operate in opposite directions against the inner sides of the posts when the pedestal parts are approximately closed, and means for stopping the shank against rotation.

3. A look for a divided-pedestal extensiontable comprising two vertical posts spaced sidewise apart on one pedestal part, a rotatable shank on the other pedestal part, and two fingers pivoted on the same part with operative connections between the shank and the fingers, the ends of the fingers being curved laterally and being adapted to operate in opposite directions against the sides of the two posts when the pedestal parts are approxi- JOHN L. ARNOLD.

Witnesses:

Josnrrr FREASE, HARRY FREAsE.