US38023A - Improved door and shutter spring - Google Patents

Description

UNITED STATES PATENT OFFICE.

LORENZ BOMMER, OF NEW YORK, N. Y.

IMPROVED DOOR. AND SHUTTER SPRING.

Specification forming part of Letters Patent No. 38,023, dated March 31, 1863.

To all whom it may concern:

Be it known that I, LORENZ BoMMER, of the city, county, and State of New York, have invented a new and Improved Door and Shutter Spring and I do hereby declare that the following is a full,clear,v and exact description of the same, reference being had to the accom panying drawings, making a part of this speciiication, in which- Figure l is a face view of a door with my invention applied to it; Fig. 2, a detached view of the spring 3 Fig. 3, a detached view of the case of the spring; Fig. 4., a top or plan view of the device shown in the position it assumes where the door is half open; Fig. 5, an end view of one of the pintles of the spring; Fl g. 6, an end view of the spring.

Similar letters of reference indicate corresponding parts in the several figures.

This invention consists in the employment or use of a spiral spring provided with a pintle at each end, and arranged and applied to the door or shutter in such a manner that its tension may be regulated as desired so as to act more or less powerfully upon the door as may be required.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents a door, and B a door-frame, the door being hinged to the frame in the usual or any proper way.

O O, Fig. 1, represent the hinges.

D is a spiral spring, the convolutions of which are in close contact. This spring may be ot' any suitable length and diameter, and its upper and lower ends are bent inward toward the center of the spring, as shown at ax, Fig. 6.

E E are the pintles, which are of such diameter that they may be fitted into the ends of the spring. These pintles are each provided with a shoulder, a, and these shoulders bear against the ends of the springs, as shown clearly in Figs. 1 and 2. The upper pintle, E, has a head, d, formed on it, which is perforated with holes c, and into any one of these holes a pin, F, is fitted. The lower pintle, E', is provided with or has a plate, G, attached to it, in which screw-holes are made to admit of said plate and its pintle being secured to the door-frame B. The upper pintle, E, is not attached to the door-frame. It has a plate, H, fitted on its head b, and this plate is allowed to turn on the head and rest on the shoulder a. (See Fig. 2.) The plate H has a plate, I, attached to it at right angles, and the latter plate has screw-holes e made in it through which screws pass to secure said plate to the door. fr The pintles E E are each slotted at their inner ends, as shown at f in Fig. 5. These slots may extend wholly or partially across the pintles. They are shown as extending half-way across it in Fig. 5. The bent ends a* of the spring D are tted in the slots f of the pintles E E', and on the plate H, which is fitted on the head b of the upper pintle, E, there is a vertical projection, g, against which the pin F in the head b bears.

From the above description it will be seen that the spring D is made to act upon the door A through the medium of the upper pintle, E, pin F, and the projection on the plate H, and the door will consequently be kept in a closed state when not forcibly opened. When the door is opened, the spring A will be twisted in consequence of the projection g bearing against the pin F, and when the door is released the spring D instantly closes it. The strength of the spring may be regulated as desired by adjusting the pin F in different holes, c, inthe head b of the upper pintle, E. This is effected by inserting a small rod in one of the holes c and turning the head so as to twist or wind the spring to increase its i tension,'and then inserting the piu F in a hole, c, near the projection g. The spring D should be encompassed by a cylinder, I. (Shown in Figs. l and 3.) This cylinder serves as a case for the spring, and eifectually protects it from the weather.

The principal advantage of this spring consists in the readiness in which it may be applied to the door and the small cost of its manufacture, together with the facility in regulating its strength or tension. When applied to a door. or shutter, it does not present an unsightly appearance, as most other springs for the same purpose, and it is not liable to get out of repair or become deranged by use.

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

The plate H, with the projection g and plate I, in combination with the pintle E and pin F, constructed and applied substantially as and for the purpose specified.

Witnesses: LORENZ BOMMER.

M. S. PARTRIDGE, DANIEL RonEETsoN.

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