US71081A

US71081A - Improved door and gate-spring

Info

Publication number: US71081A
Authority: US
Publication date: 1867-11-19
Anticipated expiration: 1884-11-19

Description

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ENOS STIMSON, OF MO-NTPELER, VERMONT.

Letters Patent No. 71,081, dated November 19, 1867. i

IMPROVED D001?. AND GATE-SPRING.

TO.ALL WHOM IT MAY CONCERN:-

Be it known that I, E Nos STI'ISON, of Montpelier, in the 4county of Washington, and State of Vermont,v have invented a new and improved Doorand Grate-Spring; and I do hereby declare that the followingisa. full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification. i

This invention relatcsto a door and gate-spring for holding a door or gate either open or closed. It consists of four spiral springs, set on two (2) rockshai`ts, to which one end of each of the spirals coiled upon it is secured, the other ends being attached to the main casting or frame. At the ends attached to the main casting the springs' rest on loose pulleys, thereby reducing the friction, as the springs do not touch the rollers or rockshafts between their extremities.l

The two shafts are connected by a clasp looped on the shafts, and fastened by a joint, and can be readily' detached. A stop on the casting prevents the clasp, when detached, from beingdrawn out of reach bythe spring. In the accompanying drawings- I Figure 1 is a front view, partly in section, of my spring applied to a door when heldclosed, and

Figure 2 is a transverse section thereof at line :v :v

Similar letters of reference indicate corresponding parts. p

A .A represent the door vand post, B the main casting or frame in which the rock-shafts C C are journalled in slots 11 b. D D are four (4) spiral springs set on the rock-shafts C C, to which, uit d d, one end of each spring is secured; the other end, after ceiling upon the loose pulley E, being secured to the main casting at e. The loose pulleys E, by keeping the springs D off the shafts C, serve to diminish the friction and Wear oi' the springs. Clasps F loop on to the rock-shaft atf, and hook into each other, so as to be readily disconnected, and will then set back intothe door or post suiliciently to be out of the way, the stops g arresting the univinding of the-springs by catching the rock-shafts at d, and so prevent the clasps from being withdrawn out of reach. 'The clasps work through the slot G, and thus the greatest purchase on the door is when it is shut, keeping it closed, the spring being then at its greatest tension, relaxing more and more as the door opens, until it is 'right back to the post,

which is the dead-point.`

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

1. The springs D and rock-shaft C, in combination with the slotted main castings B,substantially asdescribed, in combination with lthe clasps E, in manner and for the purposes substantially as herein set forth and'described.

g The lo'ose pulleys E, in combination with the springs D and rock-shaft ,0, substantially as herein shown and described.

ination with the main'castings B and rock-shafts C,'substantially as herein set forth 3. The stop g, in comb and described.

p ENOS STIMSON. Witnesses:

Guo. P. Ruim, ZEBINA M. CAMP.