US2481999A - Mechanism for vibrating diaphragms of pulp screens - Google Patents

Description

M. F. HAYES Sept. 13,1949.

MECHANISM FOR VIBRATING DIAFHRAGMS OF PULP SCREENS 3 Sheets-Sheet 1 Filed April 7, 1945 I 9 I JNVENTOR. Mdfifl M. F. HAYES Sept. 13, 1949.

MECHANISM FOR VIBRATING DIAPHRAGMS OF PULP SCREENS 3 Shets-Sheet 2 Filed April 7, 1945 INVENTOR. Md

Sept. 13, 1949.

Filed April 7, 1945 M. F. HAYES MECHANISM FOR VIBRATING DIAPHRAGMS OF PULP SCREENS 3 Sheets-Sheet 3 'INVENTOR.

BY we? Patented Sept. 13, 1949 MECHANISM FOR VIBRATING DIAPHRAGMS OF PULP SCREENS Millard F. Hayes, Hudson Falls, N. Y., assignor to The Sandy Hill Iron & Brass Works, Hudson Falls, N. Y., a corporation of New York Application April 7, 1945, Serial No. 587,133

1 Claim. 1

This invention relates to improvements in paper pulp screens and is directed more particularly to improvements in operating means therefor.

Apparatus of the type to which the invention relates is shown and described in U. S. Patents No. 1,578,590 of March 30, 1926, and No. 1,923,479 of August 22, 1933.

The principal objects of the invention are directed to the provision of operating mechanism for a paper pulp screen apparatus which is strong and rigid in construction and easily and readily assembled and disassembled and at the same time novel means is provided to facilitate lubrication.

According to special features of the invention, the construction includes half-housings which form a chamber in which a cross-head is reciprocable up and down and is characterized by means to seal said chamber that is arranged to permit sliding movements of the cross-head and diaphragm member associated therewith.

With the foregoing and various other novel features and advantages and other objects of my invention as will become more apparent as the description proceeds, the invention consists in certain novel features of construction and in the combination and arrangement of parts as will be hereinafter more particularly pointed out in the claim hereunto annexed and more fully described and referred to in connection with the accompanying drawings wherein:

Fig. 1 is a side elevational View of operating mechanism embodying the novel features of the invention;

Fig. 2 is a front elevational view of the mechanism shown in Fig. l; and

Figs. 3 and 4 are sectional plan views on the lines 3-3 and 4-4 respectively of Fig. 1.

Referring now to the drawings more in detail the invention will be fully described.

A single operating mechanism is shown for illustrative purposes but it will be understood that plural mechanisms may be used with a screen construction.

The usual bridgetree of a screen apparatus is represented by 2 in which is journalled a drive or cam shaft 4. The bridgetree may be of any length and the shaft 4 may be rotated in any well known manner. Said bridgetree is hollowed out to provide a chamber or well for lubricant, as shown.

A pair of half-housings 6 are provided which are similar in construction. These are secured together in back to back relation by bolts such as 8 and fixed to the bridgetree 2 by other bolts Ill. The half-housings are formed to provide a chamber.

Bearing caps 12 of bearings for the shaft 4 are secured to the bridgetree. Parts I 4 of the half-housings are formed to surround the ends of the caps 12 and packing means It provides a seal, see Fig. 2.

7 Guides is are secured to the sides of the halfhousings and have parts 29 extending through openings in said half-housings which are provided with guide surfaces 22 forming a vertically disposed guideway, see Fig. 4.

A cross-head 24 is reoiprocable up and down in said guideway and the lower portion of the said cross-head is hollowed out to receive a roller shoe 26. Said shoe 26 has trunnions 28 mounted in anti-friction bearings 30 associated with opposite sides of the cross-head, see Fig. 2.

A cam 32 fixed to the drive shaft 4 underlies the roller shoe and as the said shaft 4 rotates the cross-head is moved upwardly thereby.

A fork member over the cross-head extends upwardly therefrom and it has its lower end secured thereby by bolts 42. The said lower end of the fork and upper sideof the cross-head are provided with aligned sockets 44 and 46 in which a spring 48 is disposed. A spacer 50 at the upper end of said spring 48 is provided and an upper spring 52 is supported thereby. A cap 54 is pro vided on the upper end of the spring 52.

A cross-bar 56 has opposite ends connected to rods 58 which have lower ends disposed in sockets 62 provided in the half-housings as shown in Fig. 1. An adjusting screw 64 in engagement with the cross-bar bears on the cap 54 and is adapted for adjustment so that the springs 48 and 52 may offer varying degrees of resistance to upward movements of the cross-head.

The upper portion of the fork member 40 is secured to the fork member of the screen apparatus with which the mechanism is used and as the shaft 4 rotates the cross-head is moved upwardly by the cam against the action of the springs which moves the cross-head downwardly and urges the roller shoe against the cam 32.

Ordinarily the shaft 4 is rotated at high speed to bring about a vibrating action of the diaphragm.

The half-housings with the bridgetree provide a closed chamber in which the cross-head is disposed and to seal the upper side of the chamber a flexible seal member H! is provided. The inner portion of the seal 10 is clamped between the cross-head and fork member and its outer portion is secured to the upper sides of the half- 3 housings by a clamp member 12 and bolts 14, see Fig. 3.

The member 10 may be made from any yieldable or flexible material desired such as rubber, leather, composition, treated fabric, or the like.

Openings 16 and [8 are provided in the halfhousingsfas shown Fig. 1, through which lubricant may be introduced, under pressure, if ""desired, and a receptacle 80 secured to the halfhousings is provided for directing lubricant to the surfaces of the guidewayz-andgcrossehead.

The parts of the mechanism may bezxtealdily assembled and disassembled and the construction is such that the operating jparltsitare-isuitablyenclosed for efiicient lubrication. a H

The invention may be embodied in other specific forms without departingffromtheviessential characteristics thereof. Hence, the present embodiments are therefore to be considere'd"in all respects merely as being illustrative and not as "being restrictive}- the scope of'the'invention being indicated by the appended claim rather tlf 'ani'by the T-foregoing *descript-ion, and: all *frhodifications and -variatior1s as fallwithin" the'*ir1 eanihg arid purview and-range or equivalency of eapperrded claim' are therefore ifiterided to be embraced therein. H

What'it isdesiredito claim and secure by l ietters"PatentfoftheUnited?Statesiis:

"JIfhe (combination '6f..a" b"'d'getree, provided with bearings having a shaft rotatable therein carrying a cam and having'a well rbetwe'en saidfbear 'ingsin which. saidfcamjis located and which is ,Qfieriat its; upper "side with '"mecl'ia'riism" for vertically vibrating the'diaphragm Lof a; pulp screen comprising, j'half housin'gs extending upwardly from saidbridgetreehaving'-contiguous"innerside faces secured "together "in sealedtrelation, said haif housihgslormed' tojprovide"averticalochamberbveranuiiin c"o mmiiriicationfwithsaid Well and ,iha'vi'ng "-side w'ails 'fprovided "with openings ftherethroughfi; guide members s'ecu'red to' said =liousings having ypjarts "extending through {8 3 1 -"op'eni r' igs and into i-said 'chamber fand 'provided-v'vith'spacedfvertfoally-'extendinginnerfaces disposed in said chamber, a crosshead in said chamber provided with a spring socket in its upper side, opposite outer side faces of said crosshead and said inner faces of the guide mem= bers provided with coacting guide means to permit vertical reciprocation of the crosshead in the chamber and prevent relative twisting: movements thereof; airo'ller journalledun the lower portion of said crosshead in engagement with said cam, a flexible sealing member at the upper side of qfiaid.half honsingiand crosshead having an openov-er said spring socket secured thereto and closing the upper end of said chamber, means fs'ecuring s'aid sealing member to said crosshead Ei5f rfiJE GafiSacting in the upper side of said crosshead disposed outside said chamber above .thesse'alingimem ber resisting upward movements ofthe crosshead, and a member over said sealing memb'er secured to theiupper side of said crosshead adapted for connecting to a diaphragm of a screen -thereabovw each' inner face' of -'-tlie guide member and' of tl ie'vcrosshead iriluding a pair of longitudinaily -extending fiat=suffacesarrangd in the form of a V, and said vertical chamber and Well aprcviiiing i-a r-compartment for iubricant in whiclrrsaid cam; roller-arid: crosshead-are (:lis'ps'e'd andr'closedibwsaidtsealing member.

sR-EFEEENCESeGITED V :The followingrferenceswrewfrecord-in the fiieof patent:

aUNITED ,STA'IES :PA'IENTS

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