Alvord v. Smith & Watson Ironworks

216 F. 150, 1914 U.S. Dist. LEXIS 1565
CourtDistrict Court, D. Oregon
DecidedJuly 27, 1914
DocketNo. 6145
StatusPublished
Cited by1 cases

This text of 216 F. 150 (Alvord v. Smith & Watson Ironworks) is published on Counsel Stack Legal Research, covering District Court, D. Oregon primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Alvord v. Smith & Watson Ironworks, 216 F. 150, 1914 U.S. Dist. LEXIS 1565 (D. Or. 1914).

Opinion

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The drum arrangement is carried on a shaft, journaled in bearings at, the shaft being supplied with a gear C, which by other suitable gearing is connected with the engine. 'This gear carries a friction-cone c, and, one end of the drum being provided with a friction-band d, the drum is caused to revolve with the shaft by bringing the friction-band d into engagement with cone c by a thrust imposed by the device of which Corbett claimed to be the inventor, and thus the drum is utilized, through means of rope or wire cable, for drawing, hauling into place, or lifting objects of great weight. The drum is released when the [152]*152thrust is withdrawn, by means of a spring B, and ceases again to revolve with the shaft. These elements, namely, the cone c and the friction-band d, constitute the friction-clutch. Further, to illustrate how the thrust is imposed upon the drum, a key G extends through a slot b extending through the shaft, which engages collar B. This in turn engages the end of the drum opposite the end containing the clutch arrangement, and the whole is driven endwise into engagement by a thrust exerted by means of the pin H upon the key G.

So far as the drum and its mechanism are concerned, including the slot in the shaft and the key and collar, there is no present claim for invention. It is only to the device for the operation of this drum mechanism that the claim pertains.

Corbett's specific invention consists of the carrier I, threaded on the end of the shaft B, to the outer end of which is bolted a flange-plate this flange-plate forming a shoulder i on the inside of the carrier opposite the end of the shaft. This carrier is sometimes called a sleeve, either designation being appropriate, as some one or more of its elements is taken into account.

A nut /2, referring to figure 3, is journaled in the flange-plate which has a shoulder p opposed to and facing shoulder i formed by the flange upon the sleeve. Between these shoulders are interposed two disks or washer-plates, between which are roller-bearings. The rollers are held in place by a spreading-ring p, which has but the one purpose. 'Ihe plates are of very hard material. The nut P is internally threaded, and is locked against rotation by means of clamp K, which, having an arm k, is secured to some part of the frame. This nut So adjusted is called the fixed screw member. It does not revolve with the shaft, although carried on it, but the carrier or sleeve revolves about and outside of it, and always with the shaft. Within the threaded cavity of this fixed screw member is' inserted a screw B on the outer end of which is adjusted a lever with which to operate the screw. This is called the active screw member. A socket is provided in the inner,end of the screw, in which is inserted a pin V. This pin co-operates with another or floating pin Ia, and the latter with the thrust pin H which extends through the center of the shaft longitudinally free to rotate, and engages the key G, extending crosswise through the slot b, and is thus brought into engagement with the drum. In operation, the lever is thrown forward, which advances the active screw member, and through the pins V, le, and H, the drum friction-band is thrust upon the friction-cone, and locked, thus enabling it to take the coil of the cable and draw the load desired. When the screw is advanced, the shoulders of the fixed screw member are drawn back against the shoulders of the sleeve or carrier, and the latter, revolving with the shaft, causes friction at the shoulders. By reason of the great power exerted by the fixed screw member on the thrust, the friction becomes so intensified at the shoulders and at the contact of the pins as to 'generate heat to such an extent sometimes as to cause a welding, and, to provide against heating, the roller-bearings were introduced, and the thrust-pin divided into-three or more parts, which seems to have solved the problem. In unlocking the mechanism, the lever is simply thrown back to place.

[153]*153Twelve claims are made under the patent, of which Nos. 1, 2, 5, and 12 are invoked to sustain the allegations of the infringement. No. 1 is as follows:

“In a foisting or logging device the combination with the main bearings; the shaft journaled in said bearings and having an attaching end; a driving friction-wheel mounted on said shaft; a drum mounted'on said shaft; a driven friction-wheel locked against rotation relatively to said drum, said driving and driven friction-wheels being adapted to be brought into frictional engagement by an axial movement of one of them; thrusting devices in the attaching end of the shaft, extending from without the bearing to within the bearing; and a connection between said thrust devices and the one of the friction-wheels free to move axially into engagement; of an apparatus mounted on the attaching portion of the shaft for actuating said thrust devices, comprising a carrier attached to the shaft; a relatively fixed screw member mounted on the carrier, the carrier being arranged to receive the axial thrust of said screw member; means for locking said relatively fixed screw member from rotating with the carrier; an active screw member operating in connection with the relatively fixed screw member, and adapted to exert a thrust on said thrust devices.”

No. 2 is a repetition of the first, with an additional element in words, "And a roller-bearing between said relatively fixed screw member and •the carrier.”

No. 5 has the additional element, “And a loose pin interposed between said active screw and said thrust devices.” -

No. 12 varies the last part of No. 1 to read as follows:

“Of an apparatus mounted on the attaching portion of the shaft for actuating said thrust devices comprising a screw member fixed against axial movement relatively to the shaft, said screw member being mounted outside of the bearing, the shaft being free to rotate without rotating the screw member; and an active screw member arranged to operate with said relatively fixed «crew member for exerting thrust on the thrust devices.”

The alleged infringing device consists in a nut, circular in form, screwed on the end of the shaft and revolving with it, which extends beyond the circumference of the shaft, forming a shoulder outside of it. The fixed screw member extends beyond the shaft in which the active screw member is adjusted, co-operating with a thrust-pin extending through the shaft and forming an engagement with the drum device. Ihe fixed screw member also extends back, in a sleeve arrangement or carrier, over the circular nut, and, closing in on tha shaft, forms a shoulder opposing the shoulder on the nut.

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Cite This Page — Counsel Stack

Bluebook (online)
216 F. 150, 1914 U.S. Dist. LEXIS 1565, Counsel Stack Legal Research, https://law.counselstack.com/opinion/alvord-v-smith-watson-ironworks-ord-1914.