US433108A

US433108A - William a

Info

Publication number: US433108A
Authority: US
Publication date: 1890-07-29
Anticipated expiration: 1907-07-29

Description

(No Model.)

W. A. TURNER..v

KNOB.

NQ. 433,108. Patented July 29, 1890.

@UV/Mm 0,0010/ USGA/m01,

AUNITED STATES PATENT OFFICE.

VILLIAM A. TURNER, OF \VORCESTER, MASSACHUSETTS, ASSIGNOR TO EDMUND CONVERSE, OF SAME PLACE.

KNOB.

SPECIFICATION forming part of Letters Patent No. 433,108, dated July 29, 1890.

Application filed May 10, 1890.

To all whom it may concern:V

Be 1t known that l, WILLIAM A. TURNER, a citizen of the United States', and a resident of Worcester, in the county of Vorcester and State of Massachusetts, have invented a new and useful Improvement in Knobs, of which the following` is a specification, reference being had to the accompanying drawings, in which- Figure l represents an elevation of a knob embodying my invention. Fig. 2 is a central sectional view of the same. Fig. 3 is a detached view of the spindle by which the knob is attached. Fig. 4 is a top View of the elastic washer. Fig. 5 is a side View of the same, and Fig. 6 is an end View of the plate by which the open end of the shell forming the body of the knob is closed.

Similar letters refer to similar parts in the different figures.

My invention relates to knobs to be used in connection with dampers or registers, and it has for its object to produce a knob which, when attached to the register or damper, will cause the same to press against the door or wall upon which the damper operates.

A denotes the body of the knob, consisting of a shell which is conveniently and preferably made from a metal sheet or blank by means of suitable dies and punches inthe usual manner of making sheet-metal knobs.

B denotes a circular plate closing the open end of the shell forming the body of the knob, the edge of the shell being turned over the edge of the plate B, as represented at B', Fig. 2. In case the shell A is not formed of sheet metal, the plate B can be otherwise attached to the shell. The plate B is provided with an angular hole B2, (shown in the drawings as rectangular,) to receive a spindle C,provided with an angular section C* to t the hole in the plate B. The spindle C extends the length of the shell A, and has a head Cl resting against the inner surface of the shell A, and a shoulder C2 to prevent the movement of the washer D lengthwise the spindle C. The angular section C* is extended outside the plate B a short distance sli ghtlyless than the thickness of door-plate E. The end of the spindle is screw-threaded, forming a shoulder F, and the rectangular section of the spindle is ex- Serial No. 351,828. (No model.)

tended beyond the plate B far enougl1,so that as the spindle is screwed into the damper or register G against the shoulder F the tension of the'spring-washer D is brought to bear on the plate B and the cndwise motion of the spindle limited, preventing too great strain being exerted upon the washer D. The washer D is formed with the elastic prongs D', which are bent or turned downward with their ends resting upon the plate B, while the washer is held by the shoulder C2. Vhen the screw-threaded end of the spindle has been screwed into the damper or register G, the end is expanded by riveting to prevent the spindle from. working loose, and the force of the blows in riveting is received bythe head ot the spindle C, resting against the inner surface of the shell A.

The spindle represented in the accompanying drawings is shown with a screw-threaded section F to be screwed into the damper or register plate G; but, if desired, this section can be left blank or without a screw-thread, and the damper or register G attached by the riveting of the end of the spindle. In such case the angular section C* can be round, if desired, as it will not be necessary to rotate the spindle by the rotation of the knob. The shoulder F should, however, be retained, as it limits the distance that the end of the spindle canbe drawn into the damper-plate. Were the shoulder omitted, there would be a danger that the spindle might be drawn so far out of .the shell A as to carry the elastic prongs outward against the shell A, and thereby destroy the elasticity of the spring, or so limit its action that itcould not yield as the knob is moved over inequalities in the surface of the plate E.

The elastic washer D is cut from a piece of steel and the prongs bent into the proper shape and tempered, and the amount of space in contact with the spindle C and plate B is so limited that a minimum amount of heat is communicated to the tempered prongs D through the spindle C.

That I claim as my invention, and desire to secure by Letters Patent, is-

l. The combination, with a shell forming the body of the knob and provided with an angular hole or opening to receive a spindle,

ICO

Shell, and a Washer held 0n said spindle and prevented from longitudinal movement thereon, and having the elastic prongs D bearing againstvthe wall of the shell, substantially as described.

3. The combination of shell A, plate B, provided With a hole to receive a spindle, a spindle C, having a head C and a shoulder C2, and awasherD,having elastic prongs D, substantially as described.

Dated the 8th day of May, 1890.

WILLIAM A. TURNER. Witnesses:

E. CoNvERsE, RUFUS `B. '"FOWLER.