US540961A - Daniel drawbaugh - Google Patents

Description

(No Model.)

. D. DRAWBAUGH.

TELEPHONE ELECTRODE.

N0 540,961., Patent'edJune 11,1895.

W itnesses: Inventor:

attorney.

m: humus PEYER$ 0o. PHOTQUTHQ" WASHINGTON, n c.

UNITED STATES ATENT FFICE.

DANIEL DRAVVBAUGH, OF EBERLYS MILL, ASSIGNOR TO G. MILTON BAIR, OF HANOVER, AND CALVIN W. BEAM, OF READING, PENNSYLVANIA.

TELEPHONE-ELECTRODE.

SPECIFICATION forming m of Letters Patent No. 540,961, dated June 1 1, 1895.-

- Application filed February 21, 1895. Serial No. 539,273. (No model.)

To a whom it m y OO II: provided each with a fixed carbon point, the Be it known that I, DANIEL DRAWBAUGH, two points being arranged in juxtaposition to a citizen of the United States, residing at and in alignment with each other, an annulus Eberlys Mill, in the county ofOumberland arranged between the diaphragms and sur- 55 5 and State of Pennsylvania, have invent-ed'cerrounding the said points, an interposed body tain new and useful Improvements in Teleof carbon between the points, and a binder phone-Electrodes; and I do hereby declare forholding the parts properly assembled;furthe following to be a full, clear, and exact thermore,inatelephone-electrode comprising description of the invention, such as will entwo diaphragms provided each with a fixed 6o 10 able others skilled in the art to which it apcarbon point, the two points being arranged pertains to make and use the same. in juxtaposition to and in alignmentwith each Th s. invention relates to telephone elecother, an elastic or spongiform annulus ar- .trodes. ranged between the diaphragms and sur- The object is to present an electrode comrounding the said points, an interposed body 15 bining the functions of a holder for loose or of granular carbon between the points, and a granular carbon, and a diaphragm or diaperipherally-arranged binder for holding the phragms, the electrode as presented constiparts properly assembled; furthermore, in tuting an article of manufacture that may be a telephone-electrode comprising two diamade and sold separately from the telephone phragms provided each with a fixed carbon 2o proper, and which shall be of simple and ready point, the two points being arranged in juxtaproduction, of high efficiency in use and operposition to and in alignment with each other, ation, and which will not'necessitate the eman annulus constructed of sponge, arranged ployment of a high order of skill to-place it between the diaphragms and surrounding in position within the telephone; furthermore, said points, an interposed body of granular 2 5 to produce an electrode of the character above carbonbetween the points, and a iiexible, pe-

designated, in which the contained granular ripherally-arranged binder for holding the carbon will be held at all times in proper relaparts properly assembled, and, finally, in the tion to the fixed carbon points of the diavarious novel details of construction, as will phragms, and in which the holder and'diahereinafter be fully described and claimed. o phragms are hermetically sealed together in, In the accompanying drawings, forming a such manner as to prevent entrance of moistpart of this specification, and in which like ure to the electrode, and to hold the dialetters of reference indicate corresponding phragms in fixed relation to each other at all parts, I have illustrated one form of emboditimes, and, at the same time, allowing such ment of my invention, capable of carrying the 8 3 5 free vibration ofthe diaphragms as to permit same into effect, although other embodiments of the accomplishment of their proper funcmay be employed, without departing from the tion. spirit thereof.

With these objects in view, the invention In the drawings, Figure I is a view in transconsists in a telephone-electrode constituting verse section showing the relative positions 4o aclosed casing containing fixed carbon points, occupied by the parts constituting a telea body of interposed granular carbon, and an phone electrode constructed in accordance elastic annulus surrounding the points; furwith my invention; and Fig. 2 is a view in thermore, in a telephone-electrode comprising horizontal section showing more particularly two diaphragms provided each with a fixed the lcontour of the annulus and also one of 5 5 carbon point, the two points being arranged the carbon points, the body of granular carin juxtaposition to and in alignment with each bon being omitted. other, an annulus arranged between the dia- Referring to the drawings, A and A desigphragms and surrounding the said points, nate two metallic disks or diaphragms' to and an interposed body of granular carbon which are suitably attached, on their inner rco 0 between the points; furthermore, in a telefacesthereof, carbon-points, a, anda ,respectphone electrode comprising two diaphragms ively, between which is interposed a body or mass of granular carbon. The diaphragms are to be made of any suitable metallic substance, and of sufficient thinness to permit of a proper degree of vibration to accomplish the function for which they are designed.

Interposed between the diaphragm, is an annulus B, which is constructed of sponge, or any other suitable spongiform-that is, soft, elastic, and porous or reticulated or woven substance, such as sponge-rubber, or woven fabric in layers, that combines the properties of resiliency and non-conductivity; but, for reasons of llghtness, and ease of manipulation, sponge is, in this instance, preferred. The annulus is of a sufficient thickness to hold the carbon-points at their proper distance apart, as shown in Fig. 1, so as to permit of the granular carbon operating to prevent any make and break of the circuit, with its attendant disagreeable results. The diaphragms are hermetically sealed together by means of a peripheral binding 0, which may be of any suitable material, such as paper or other fabric, but, in some instances, a rubber band may be employed. Instead of making both of the diaphragms flexible, I may, in some instances, make one of them rigid, and the other resilient.

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

1. Atelephone electrode comprising a closed casing, a disk-like annulus filling the space between sides of the casing, carbon buttons Within the casing of a size to fit the opening in the annulus, and a body of granular carbon interposed between the said buttons, substantially as described.

2. A telephone electrode comprising two diaphragms, a disk-like annulus filling the space between the said diaphragms, carbon buttons carried by the diaphragms of a size to fit the opening in the annulus, and a body of granular carbon interposed between the said buttons, substantially as described.

3. A telephone electrode comprising two diaphragms, a disk-like annulus filling the space between the said diaphragms, carbon buttons carried by the diaphragms of a size to fit the opening in the annulus, a body of granular carbon interposed between the said buttons, and a peripherally arranged binder for holding the parts assembled, substantially as described.

4. A telephone electrode comprising two diaphragms, a flat sponge annulus filling the space between the said diaphragms, carbon buttons carried by the diaphragms of a size to fit the opening in the annulus, a body of granular carbon interposed between the said buttons, and a peripherally arranged binder for holding the parts assembled, substantially as described.

5. A telephone-electrode,comprising two diaphragms provided each with a fixed carbon-point, the two points being arranged in juxtaposition to and in alignment with each other, an annulus constructed of sponge, arranged between the diaphragms and surrounding said points, an interposed body of granular carbon between the points, and a flexible, peripherally-arranged binder for holding the parts properly assembled, substantially as described.

In testimony whereof I affix my signatn re in presence of two witnesses.

DANIEL DRAWBAUGI].

Witnesses:

O. MILTON BAIR, E. II. PARRY.

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