US188414A - conrad h - Google Patents

Description

C. H.- ROHDE. `TBruni-INEMlsuppolw.

Patented March 13, 1877.

difesi N. PETERS. PHDTOLITHOGRAPHER. WASHINGTONy D CV Speciiication-form-m g partofLe niicat'ion led February 13, 1877.

To all whom it may concern:

Be it known that I, CONRAD H. BORDE, of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in'Table-Leaf Supports; and I do hereby declare that the following is a full, clear, and exact description thereof', which willv enable others skilled in the art to which itappertain's to make and use the same, reference being had to theaccompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

rlhe object of my invention is to produce a device for supporting the leaves of tables or of sewing-machines, or to belapplied to anything else of a character analogous to these, which device sl1all,'by means of the simplest mechanism possible, act automatically iu locking and firmly bracing the leaf upon the lat ters being raised to a horizontal position; and the said invention consists in the novel arrangement, hereinafter described, of a brace, a slotted and notched guide, and a spring, the first-named journaled or. hinged at one end to the table-rail', or'whatever may take the place thereof, in such manner that its opposite end may slide freely in the guide, which is secured to the leaf, and be shot upward into the locking-notch by the action of the spring at the proper moment-that is to say, just as the leaf attains a horizontal position.

I am aware that-various forms of mechanism embodying' a brace, a guide, and a spring, and serving, more or less effectively, the purpose above named, have alreadyv been patented 5 but my device differs essentially from them all in `its arrangement and mode of operation, as will be seen from the following description.

In the accompanying drawings, Figure l is a side elevation ot' my device attached to a table. Fig. 2 is an inverted plan AView of the same. .Figs 3 and 4 are detail views.

The brace A is pivoted or hinged at b. A stud, c, projectsv laterally from its opposite end, and slides in the slotf of the guide B as the leaf is raised or lowered, reaching, just as the leaf attains a horizontal position, the

f notch d, into which it is forced by the spring E.v The stud or pin c has a head upon its outer end, (see Fig. 4,) to prevent it'from slip- 1 ping out of the slot, which 'the neck closely fits. The circular recess e, at the outer extremity of the slot, is to permit the adjustment in position of the stud c. 'The head is passed through at that point before the guide is screwed to the leaf, and. the guide is made of such length that,. once in place, the stud will always fall short .of the recess, as indicated bythe dotted lines in Fig. 1. The guide B is provided with ang'es i t', in order that it may be firmly screwed in place.

1t will be observed that the slot f has a slight downward incline at the inner end. This is in order that the ripper bar of the guide may be made thicker at that end, so as to sn-t'- fer no loss of strength in consequence of the notch. It does not inthe least affect the action, while it does away with all necessityfor recessiug the upper end of the leaf to accommodate the thicker end of the guide. If preferred, however, the slot may be made straight throughout. The spring E is fastened at one end to the ange on the innerextremity of Athe guide, thence projecting in an inclined position downward and outward across the inner extremity of the slot, and passing close to the notch, as clearly -shown in Fig. 3. It

will be seen that, upon the leafs attaining a horizontal position, the forcing of the stud upward into the notch, and its. Subsequent retention there until forcibly removed, are necessary consequences of this mode of construction.

It is obvious, however, that the particular form of the spring is not an all-important feature of the device; but that, if preferred, a helical spring, or any other form that will promptly perform the desired function-namely, drive the stud upward into the notch`may be substituted for the one I havedescribed.

To lower the leaf the hand is passed underneath, and sufficient pressure exertedupou the upper end of the brace to overcome the resistance ofthe spring, when the leaf will descend by its own weight. It is best to press the leaf upward with the thumb while pressing the-brace downward with the lingers, as, by this means, the stud is most readily brought out of the notch.

My device answers its purpose with the utmost nicety, andthe end sought bein gi attained without the aid of any complicated mechanism whatsoever; but, on the contrary, by means of only the simplest and fewest mechanical agents possible, there is no liability of its getting out of order under ordinary conditions. Moreover,on accountof the extreme simplicity of its construction, it can be manufactured at a comparatively small cost. y

What I claim as new, and desire to secure by Letters Patent, is-

The :combination of `the 4pivoted .l ,race`.A,`

having the stndel,y the slotted gnidei, providedwith the notch d, and the spring E, op-

erating to press the stud upward into the notch, substantially as described, and for the purpose set forth.

t In testimony that Iclaim the foregoing as my own I ax my signature 'in' presence of two witnesses.` y

` v CONRAD H. ROHDE.

Witnesses: i t BRUNO KRATZENSTEIN, i

. FREDERICK B. Sm'rn. 1 i l v

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