US746373A - Air-pump-actuating device for steam-engines. - Google Patents

Description

No. 746,373; PATENTED DEC. s, 1903.

G. B. PETSGHE.

AIR PUMP AGTUATING DEVICE FOR. STEAM ENGINES.

APPLICATION FILED APR.17, 1903.

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No. 746,373. PATENTED DEC. 8, 1903. G. B. PETSGHE.

AIR PUMP ACTUATI'NG DEVICE FOR STEAM ENGINES. APPLICATION FILED APR. 17, 1903 N0 MODEL. 2 SHBBTs-SHEBT 2.

flnz'g aslre; ////ra/ UNITED STATES Patented December 8, 1903.

PATENT OFFICE.

GUSTAV BERNHARD PETSCHE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE SOUTHWARK FOUNDRY & MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

AlR-PUMP-ACTUATING DEVICE FORSTEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 746,373, dated December 8, 1903.

Application filed April 17, 1903. Serial No. 163,042. (No model.)

To aZZ whom it may concern:

Be it known that I, GUsTAv BERNHARD PETSOHE, a subject of the Emperor of Germany,residing in the city and county of Philadelphia, in the State of Pennsylvania, have invented a certain new and useful Improvement in Air-Pump-Actuating Devices for Steam- Engines, of which the following is atrue and exact description, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to devices for actuating air-pumps connected with steam-engines; and it consists of a parallel-motion construction whereby the piston of an air-pump of any diameter can be actuated and whereby the use of guide-bearings other than those incident to the ordinary construction of the steamengine is made unnecessary.

The nature of my improvements will be best understood as described in connection with the drawings, in which they are illustrated, and in which- Figure 1 is a side elevation of an engine equipped with my improvement, and Fig. 2a front elevationthereof. I

A indicates the base of the engine, having an extension, (indicated at A,) upon which the air-pump cylinder can be placed, said extension-platform being of such dimensions as to permit of its receiving and supporting cylinders of differing diameter.

B B indicate the housings and supports for the engine-cylinders and are formed'with lateral extensions (indicated at B) for purposes to be explained.

C indicates the engine-cylinder; C, the valve-box; D, the steam-conduit leading to the valve-box and embodying, as shown, a governingyalve.

Eindicates the weights of the governor; E,

a friction-disk connected with the governorspindle by mechanism, (not shown,) said governor-disk being actuated by contact with a second friction-disk (indicated at E and secured on the spindle E which is supported on the arm E of a bell-crank lever pivoted at E and having its other arm E connected for adjustment with a spindle E, E indicating a regulating-screw.

e is a beltwheel on the spindle E which is connected by a belt F with a pulley F on the shaft G of the engine.

H is the valve-spindle, pivoted at H to a swinginglink H pivoted at K, and also to a link H connected with an eccentric on the shaft G, which is indicated at H I is the piston-rod of the steam-engine, which is pivotally connected with the crosshead 7 to which is also pivotally connected the connecting-rod I, the other end of which is connected with the crank-pin I and crankarm I secured on shaft G.

J indicates the air-pump cylinder; J, the admission-conduit leading thereto; J the eX- haust-conduit.

J is a valve-spindle connected with the valve (not shown) in the conduit J and actuated through a lever-arm J 4 and connecting-rodJ by'an eccentric J G on the shaft.

J 7 is'the piston-rod of the air-pump cylinder.

K-is apivot secured on the brackets B B and supporting the fulcrum -lever, having arms K and K supporting pivot-pins itand L is a beam pivoted on the pivot-pin 7c and also pivotally connected at the end of its arm L With thecross-head 2', the arm L of the beam supporting the pivot, (indicated at Z.)

M is a connecting-link pivoted to the fulcrum-lever at 70 and equal in effective length to the length of the beam-arm L. The outer end of the link M is pivoted at m to the link N, the effective length of which is equal to the effective length of the fulcrumlever. Also pivoted at m is a head 0, which is secured to and in effect forms a part of the piston-rod J It will be at once obvious that the motion communicated from the cross-head ito the pivot m is a parallel motion and that the essential constructive feature of the device by which theparallelism is obtained lies in the feature ,that'the pivotal connection of the beam L with the cross-head, the pivot K of the fulcrum-lever, and the pivot m lie in a straight line. As long as this feature of construction is retained the proportionate length of the links and lever-arm making up 'the device can be considerably changed, it being necessary that the effective length of the link N should be equal to the efiective length of thefnlcrum-lever and that the effeetivelength and of effective length equal to that of the of the connecting-link M should be equal to the distance between the pivots 7c and 1.

Having now described my invention, What I claim as new, and desire to secure by Letters Patent, is-

In a combination With a steam-engine having a sliding cross-head, a fulcrum-lever K K pivoted on the frame of the engine, a beam L L pivoted to one arm of the fulcrum-lever and connected at one end to the cross-head, a link N pivoted to the other end of the beam fulcrum-lever, a connecting-rod M pivoted to the arm. K of the fulcrum-lever, and to the link N, the effective length of said rod being equal to the effective length of the arm L of the beam, an air-pump and a pump-piston connected to link and rod N M.

GUSTAV BERNHARD PETSOHE.

Witnesses:

CHAS. F. MEYERS, D. STEWART.

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