US236688A

US236688A - Door-spring

Info

Publication number: US236688A
Authority: US
Publication date: 1881-01-18
Anticipated expiration: 1898-01-18

Description

(No Model.)

M. O. MOHR.

Door Spring. No. 236,688. Patented Jan. 18, I881.

Fi' l.

lNVENTUR: ZP EZ M. 0. M 0 H R, JKwKLM lea.

ATTYE N4 PETERS, PHoT0-L|THOGRAPNEn, WASHIQGTON, D C.

FFICO MARTIN G. MOHR, OF MANCHESTER, IOWA.

DOOR-SPRING.

SPECIFICATION forming part of Letters Patent No. 236,688, dated January 18, 1881. I

Application filed March 12, 1880. (No model.)

To all whom it may concern Be it known that I, MARTIN O. MOHR, of Manchester, Delaware county, State of Iowa, have invented certain new and useful Improvements in Door-Springs, of which the followin is a specification.

Thisinvention relates to that class of doorspringsin which a spiral coilis employed in connection with a vertical shaft; and it consists, mainly, in constructing one of the bearing flaps or ears of the spring with a neck or recess adapted to hold the bent end of the spiral coil, and with a socket-sleeve adapted to support both the end of the shaft and the bearing portion of the coil without permitting the two to come in contact with each other.

In the drawings, Figure 1 represents a front elevation of a spring constructed in the special manner herein described; Fig. 2, a plan view of the bottom end of the spring; Fig. 3, a sectional elevation of the lower flap and the parts directly connected therewith, and Fig. 4 a perspective view of the flap detached.

To enable others skilled in the art to make my improved spring, I will now proceed to describe fnlly the construction of the same.

A,Figs. 1 and 3, represents the verticalshaft of the spring, and a, Fig. 1, the bearing ear or flap supporting the upper end of the same, the fiat portion ofwhich flap is itselfstrongly united to the jainb or door in any proper manner.

B, Figs. 1, 2, 3, and 4, represents the bearing or flap supporting the lower end of the shaft, the tlat portion of which is also strongly united to the door orjamb in any proper manner.

1), Figs. 1, 3, and 4, represents a socketsleeve, which is adapted to support the lower end of the shaft A, and also the lower end of the coil 0, without permitting contact between them.

b, Fig. 4, represents a neck or recess between the fiat and cylindrical portions of the flap B, which is adapted to receive and hold the bent end 0 of the spring, which extends beyond the bearing portion of the coil, as shown in Fig. 3. The upper end of the coil is secured to the shaft A in any proper manner.

The general operation of the spring is like others of its class.

Some of the advantages of this special construction are as follows: By constructing the lower bearing-flap with a socket-sleeve, the

end of the shaft is so held that it cannot be clamped or bound by winding the coil too tightly. By constructing the lower bearing.- flap with a neck the lower end of the coil is securely held without the use of a special socket for the same. By constructing the flap with the two special features of construction t. 0., the socket-sleeve and necka more simple and perfect spring is obtained at a low cost.

1 am aware that the bearing portion of a spiral coil has been separated from a vertical shaft by an interposed sleeve, and therefore do not broadly claim this feature; but,

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

The flap B, having the socket-sleeve b and the neck b, in combination with the bearing ends of the shaft A, and coil 0, and the bent end 0 of the latter, as described.

MARTIN O. MOHR.

Witnesses:

HENRY W. RULE, WILLIAM A. ROE.