US72992A

US72992A - Improvement in imia-rdebee dooe-speihg

Info

Publication number: US72992A
Authority: US
Publication date: 1868-01-07
Anticipated expiration: 1885-01-07

Description

@uiten gieten @anni @frn B. e. FITZHUGH, or SYKESYILLE, AssIeNoR To HIMsELr AND WILLIAM e. MAXWELL, orl BALTIMORE, MARYLAND.

Lettcrs'Patent No. 72,992, dated January 7, 1368.

IMPROVEMENT Ihl INDIA-RUBBER DOOR-SPRING.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, B. G. FITZHUGH, of Sykesville, in the connty of OarrolLvand State of Maryland, have invented certain new `and useful Improvements'in India-Rubber-Springs for Closing4 Doers;A and I do hereby declare the following' to be a full, clear, and `exact description of the sam,e',reference being had to the accompanying drawings, making` a partof this specification, in which- Figure 1.represents one of the springs irl-question, as applied to a door. l

Figure 2 represents the form in which the' rubber spring is vulcanized, it being spread or opened outwhen vapplied to the door. I

Iam aware that India-rubber straps and bands have been `used asv door-springs. I lay noclainrto such, as my India rubber possesses a quality andv performsan operatimthatv the strap orband does not possess or perform. i I I i l v My invention consists in an India-rubber, so called, spring, which is made and vulcanized in a circular or curved form, and the reacting'or reoiling property of which is not in the' line of`its length, but aline transverse thereto. v A

To enable others skilled in the art to make and use my invention, I will proceecl`to describe the same with reference tothe drawings. I l

, If a short section he out oil` from a piece of India-rubber hose, and a gash cut through it, as shown in ung. 2, and this piece be pulled out'in somewhat of a straight-form, and 'one, end ofit secured to the door-frame,- and the other allowed to press against thedoor, the spring is made and applied and instead of cutting such sections from India-rubber hose, which, however, is a verv cheap way of 'making' them, they may he moulded and vulcanized separately, hut/'substantially of the form shown in iig. 2.

In g. 1, represents one of the springs applied to'a door, B. In this figure, C represents a neat metallic box, for holding one end of the spring, and confining-'it to the deer-frame D. The other end'of the spring bears against the door, and may be kept in proper-positionby a'metallic brace, a, recess, or' holder, of any kindthat will simply keep. that end in proper position. The rubber does not' act' b y elongation 4or contraction, but' by being bent against the curved position or form in which it has been-vulcanized, anfllto which it strives to return 'as its normal condition.

Having thus fully"described my invention, what I claim therein as new, and desire to secure byLetters Patent, is-f A V An India-rubber door-spring, that Vis vulcanized in a curved or circular form, and applied to a door-vin a straighter form than that in which it was vulcanized, substantially as `and for the purpose,` herein described and represented.

as.. e. FITZHUGH.

lil/itnesses:`

A. B. STOUGHTON, EDM. F. BROWN.