US Patent: 923,593
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| Crane
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Patentee:
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| Carl G. Sprado (exact or similar names) - Milwaukee, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 07, 1906 |
| Granted: |
Jun. 01, 1909 |
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Joel Havens
"Vintage Machinery" entry for Allis-Chalmers Manufacturing Co.
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Description: |
| Abstract:
This invention relates to a crane adapted to handle heavy objects, and while it is capable of use with any form of apparatus where similar functions of operation are desirable, it is specially designed for use in connection with gas engines.
It is frequently desirable to remove the valve casings and valves from gas engines for the purpose of inspecting and cleaning them, and with the larger size of gas engines this operation is a very tedious one, especially when the exhaust valve casings are to be removed, as it is customary to place these casings underneath the cylinder where they can be reached only with difficulty by any ordinary form of apparatus.
The object of this invention is to produce a simple, cheap crane by which these valve casings may be readily handled and by which these valve casing may be removed from their seats for inspection and clean in and may be returned to their seats in exactly the position which they formerly occupied.
It is also an object of this invention to so arrange the crane that it can be used with the valve casing at either end of the cylinder of a double acting engine, the specific problem to be met being to provide a crane which will retain parallelism between the face of the valve casing and its seat, which object is accomplished by the apparatus illustrated, described and claimed by this specification.
Claims:
1. The combination in a crane of a support, an upright pivotally movable on the support, a plurality of arms pivotally movable with respect to said support, means connecting the arms for simultaneous movement thereof, and screw means wholly supported by said upright for actuating one of said arms.
2. The combination in a crane of an upright and means for supporting the same in position, two arms pivoted to said upright in such a manner that their free ends can move in a vertical plane, one of said arms being composed of sections adjustable with respect to each other whereby the length of said arm may be adjusted, and means connecting the arms for simultaneous movement thereof, a sleeve movable upon said upright, and supporting means uniting one of said arms with said sleeve, and means to vary the position of said sleeve upon said upright.
3. The combination in a crane of an up right and means for supporting the same in position, two arms pivoted to said upright in such a manner that their free ends can move in a vertical plane, one of said arms being composed of sections adjustable with respect to each other whereby the length of said arm may be adjusted, and means connecting the arms for simultaneous movement thereof, a sleeve movable upon said upright, and supporting means uniting one of said arms with said sleeve, said upright being provided with screw threads, and a nut engaging with the screw threads of said upright to permit the sleeve to be moved up or down.
4. The combination with a body, of an upright pivotally movable with respect to said body and journaled on said body, arms secured to said upright, a second body to which said arms are secured, and screw means wholly supported by said upright for raising or lowering said second body.
5. The combination with a body, of an upright pivotally movable with respect to and journaled on said body below the same, a second body, arms secured to said upright and to said second body, and means for raising or lowering said second body, said arms being of such length and the upright being so mounted with respect to said first body that said second body may be swung from beyond a side of said first body underneath and raised toward the same or the reverse.
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