US637319A - Door-spring. - Google Patents

Description

Pate'nfed Nov. 2|, I899.

M. C. 'BERSTED.

D 00 R S P R l N G (Application filed Apr. 19, 1899.)

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UNITED STATES PATENT ormn.

MARTIN C. BERSTED, OF CHICAGO, ILLINOIS.

DOOR-SPRING;

SPECIFICATION forming part of Letters Patent No. 637,319, dated November 21, 189s. Application filed April 19, 1899. Serial No. 713,547. (No model.)

To all whom it may concern:

Be it known that I, MARTIN O. BERSTED, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Door-Springs, of which the following is a full, clear, and exact specification.

My invention relates more particularly to that class of door-springs consisting of a torsion-spring-such, for example, as a coilspring-attached at one end to the door and at the other end to the door-frame or some other fixed part; and my invention has for its primary object to simplify, cheapen, and improve the construction of the devices for thus attaching the spring.

Another object of my invention is to provide an improved and efficient form and arrangement of holding-dog and coacting parts for preventing the unwinding of the spring and at the same time permitting the tension of the spring to be easily and conveniently altered at will.

WVith these ends in View my invention consists in certain features of novelty in the construction, combination, and arrangement of parts by which the said objects and certain other objects hereinafter appearing are attained, all as fully described with reference to the accompanying drawings and more particularly pointed out in the claims.

In the said drawings, Figure'l is a side elevation of a part of the door and the frame with my improved spring attached thereto. Fig. 2 is a vertical longitudinal sectional view of the spring detached, taken on the line 2 2, Fig. 1. Fig. 3 is a face View of the blank of which the fixed bracket for holding one end of the spring is composed. Fig. 4 is a face View of the blank of which the bracket at the other end of the spring for holding the revolving hub hereinafter described is composed. Fig. 5 is a similar View of the blank for composing the aforesaid revolving hub. Fig. 5 is a view showing the next stepin the formation of the hub. Fig. 6 is a transverse sectional view taken on the line 6 6, Fig. 2, on an enlarged scale. Fig. 7 is a face View of the revolving hub and its holding-bracket, showing a modified form, the part of the holding-bracket which embraces the hub being shown in section; and Fig. 8 is a sectional View thereof, taken on the line 8 8, Fig. 7.

1 represents the door, and 2 the frame; but so far as the operation of the spring is concerned' 1 might be the frame and 2 the door; and 3 is a coil-spring of the usual or any suitable form commonly employed for this class of door-springs. In the upper end of the coilspring 3 is inserted a stem 4, which is formed on a bracket attached by screws 5 to the portion 2, the stem 4 having an aperture for the admission of the end 6 of the spring 3 for preventing the spring from rotating as the door is opened. This stem 4: and bracket are oomposed of a blank. (Shown in Fig. 3.) This blank consists of a plate 7, which has a central substantially circular portion from which radiate a number of tongues 8, three being shown, and also an ear 9, having perforations 10 for the admission of screws 5. The stem 4 is formed by striking up the plate '7, preferably on the circular dotted line 11, and bringing the tongues 8 together edge to edge, a space between the inner ends of the tongues adjacent to the ear 9 being left for the admission of the inturned end 6 of the spring. The ear 9 isgiven its proper relative position .or arrangement with respect to the stem 4 by bending it off at substantially right angles to the face of the plate 7, as shown in Fig. 2, the edges of the ear 9, if desired, being serrated and turned downwardly to form teeth 12 for engaging in the woodwork and better holding the bracket in place. In the other end of the spring 3 is inserted a stem 13, having one or more holes 14, into which the inturned end 15 of the spring may be inserted for causing the spring to twist. The stem 13 is formed on a revolving hub, with which the locking mechanism and the tightening-key engage, as will be understood. This hub is shown at 16 in Figs. 1 and 2, and it is composed of the blank shown in Fig. 5. This blank consists of a plate 17, which is substantially circular and has radiating from it a number of tongues 18, four of the same being shown projecting from the plate, on the diameters thereof, and each of the tongues is'provided near its inner end on each side with a prodotted line 20, which thereby constitutes a cup-shaped form, and the perforations 14 in the side of the hub 16 are formed by squeezing the tongues 18 together until the projections or bosses 19 meet, as shown in Fig. 5. If after this course the tongues 18 are squeezed still further together until they meet throughout substantially their entire lengths, it will be seen that the stem 13 will be constituted, and the perforations 14 will also be left between the tongues at their inner ends, just above the perforations 14. In striking up the blank to form this hub and stem the body portion 16 of the hub is compressed at a point slightly above its lower end or edge to form a flange 21, over which engages an inturned flange 22 on the holding-bracket for the hub, which I will now describe. This bracket, which is secured to the door or part 1 by screws or other devices 23, is composed of the blank shown in Fig. 4. This consists of a plate having a circular portion 24 and a projecting ear 25, provided with perforations 26 for the passage of the screws 23. The car 25 is bent at an angle-substantially right angles-to the face of the plate 24, and the edges of the plate 24 are serrated, so that after its edges are turned up to form a cup for receiving the hub 16 the serrated edge may be turned or reamed over the flange 21 for preventing the hub from being withdrawn from the cup or socket 27 thus formed. The edges of the car 25 may be serrated, as shown in Fig. 4, and turned downwardly to engage in the woodwork.

The plate 17 is provided with a central aperture 28, having a number of teeth or notches 20 formed in its edge, and passing through a slot 30 in the plate 24 is a locking dog or pin 31, which engages with one of the teeth or notches 29, and thus holds the hub 16 against rotation, the teeth or notches being beveled o'r inclined to permit the hub to turn in the opposite direction when sufficient power is applied by means of a key (not shown) inserted in one of the perforations 14 when it is desired to alter the tension of the spring. The locking-dog 31 is provided on its outer end with a thumb-piece or head 32, whereby it may be slipped back and forth in the slot 30 to engage or disengage the teeth 29, and the innerend of the dog 31 is provided with a flange 33, which prevents the dog from falling out of the slot 30. In order that the dog may be inserted through the slot 30, the plate 24 at one end of the slot is provided with a tongue 34, struck up therefrom and being of suflicient diameter to admit the flange 33. After the flange has been inserted the tongue 34 is pressed down into place to fill up the opening through which the flange entered.

In the form of my invention shown in Figs. 7 and 8 the locking-dogs 31, which is the same in construction as the dog already described with reference to the other form, is arranged in the side of the bracket and engages the teeth in the side of the hub instead of in the end. In this form 35 represents the stem corresponding to the stem 13, 36 represents the hub corresponding to the hub 16, and 37 is the plate upon which the hub-socket is formed. 38 represents the teeth, which are formed in a flange 39 on the side of the hub 36 and with which the dog 31 engages. Just above the teeth 38 the hub is formed with a peripheral flange 40, which, together with the flange 39, constitutes aperipheral channel for the end of the dog or pin 31 to run in. The pin or dog is held in place by being passed through a slot 41 in the side of the hub socket or cup 2", and it is prevented from pulling out of the slot by its head 33, which engages over the teeth and flange 39.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-

1. The combination with a coil-spring and means for securing it at one end, of a plate having radiallyprojecting tongues bent toward one another, edge to edge, to form a stem entering and being secured to theother end of said spring, and means for attaching said plate to the part to which it is to be secured, substantially as set forth.

2. The combination with a coil-spring and means for securing it at one end, of a plate having radially-projecting tongues and an ear, said ear being bent at an angle to the face of the plate and the tongues being bent together edge to edge to form a stem inserted in and being secured to the other end of said spring, and means for attaching said ear, substantially as set forth.

3. The combination with a coil-spring having means for securing it at one end, of a revolving hub having a stem entering the other end of said spring and being secured thereto and provided with a series of teeth, a holding bracket or socket for said hub having a slot and a locking pin or dog passing through said slot and engaging said teeth, substantially as set forth.

4. The combination with a coil-spring and means for attaching it at one end, of a revolving hub having a stem entering and being secured to the other end of said spring, said hub having a series of teeth, a holding bracket or socket for said hub having a slot, a flanged pin or dog passing through said slot, a tongue equal in diameter to the flange of said pin, struck out of said bracket eontiguous to said slot for admitting said flange and being bent down flush with the bracket for holding said pin from withdrawal, substantially as set forth.

5. The combination with a coil-spring and means for attaching it at one end, of a hub composed of a plate having an aperture provided with a notched edge, said plate having radial tongues bent together to form a stem entering the other end of said spring and having means of attachment to said spring, a holding-socket for said hub and a lockingdog secured to said socket and engaging the notched edge of said aperture, substantially as set forth.

6. The combination with a coil-spring and means for attaching it at one end, of a hub composed of a plate having an aperture provided with notched edges and radial tongues projecting from said plate and having bosses near the inner ends thereof, said tongues being squeezed together to bring said bosses into contact to form apertures, and a stem for insertion into said spring, a bracket having a cup-shaped socket having its edges reamed over a part of said hub and a locking dog or pin passing through said bracket and engaging the notched edge of said aperture, sub stantially as set forth.

7. The combination with a coil-spring and means for attaching it at one end, of a hub having a stem and aseries of apertures for receiving the other end of said spring and a tightening-key respectively, said hub being composed of a plate having its edge struck up to form the side of the hub and tongues radiating from the body of the plate and hav-

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