US769256A - Propeller. - Google Patents

Description

No. 769,256. PATENTEDSEPT; a, 1904.

. I H. ENGE.

PROPELLER.

APPLIOATION FILED UN 17, 1903.

' N0 MODEL.

n all UNITED STATES Patented September 6, 1904.

P TENT OFFICE.

PROPELLER. 7

SPECIFICATION forming part of Letters Patent No. 769,256, dated September 6, 1904.

Application filed June 17,1903.

To all whom itwwty concern.-

Be it known that I, HERRMAN ENGE, a citizen of the United States, residing at WestBerkeley, Alameda county, State of California, have invented certain new and useful Improvements in Propellers; and I do hereby declare the following to be a full, clear, and exact description of the same..

' The present invention relates more particularly to propellers designed for small boats, such as launches driven by gasolene or steam, and resides in the means whereby the propeller-blades may be shifted to change the boats speed or the direction of its travel without reducing the speed of its drive-shaft or changing the direction of its rotation, thus dispensing with the complicated and expenshould be had to the sive mechanism required to reverse the boats direction oftravel and vary its speed.

By the use of the hereinafter-described propeller the speed of the boat may be quickly varied and its direction of travel changed or reversed while the drive mechanism is operating under full head.

To comprehend the invention reference accompanying sheet of drawings, wherein i V Figure 1 is a rear end View of the propeller, the hub-cap being removed in order to illustrate the connection between the operating-- v rod and the crank-arms'for the propellerthe parts blades blades. Fig. '2 is a longitudinal sectional plan viewof the. hub, illustrating the positionof one. of the crank-arms when the blades are positioned as set forth in Fig. 1 of the drawings; Fig. 3 is a similar View of the hub with positioned to place the propellerin 'a vertical or non-operative position. 7 Fig. 4 is a similar view disclosing the position of one of the crank-arms when the propellerblades stand in a reverse position to that illustrated by Figs. 1 and 2 ofthe drawings, and Fig. 5 is, a detail broken perspective view of the operating-shaft-and its head for engaging with and actuating the crank-arms of the propeller-blades during longitudinal movement of the operating-rod.

The numeral 1 isused to indicate a propellershaft, to the outer end of which is attached the hub'2. Through the propeller-shaft 1 Serial No. 161.797. (No model.)

There is a crank-arm 12 for each propellerblade 13, which crank-arms are attached by set-screws 15 to the shank 15 of the propellerblades. Said shanks 15 extend through the outer wall of the hub 2, the crank-arms being attached to the ends projecting within the chamber 6 of the said hub. The position of the crank-arms 12 controls that of the propellerblades 13, the throw of the crank-arms in turn being regulated through their connection with the head 7 by the movement of the rod 3. r

Presuining the parts to stand in the position set forth in Fig. 2 of the drawings, which positions the propeller-blades 18 at an inclination for forward travel of a boat, and it is desired to place'thepropeller-blade in a vertical or neutral position, the operating-rod 3 is then moved or forced outward, causing the studsor pins 8 of the head 7 to gradually move from within seat 10 of the crank-arms 12 and studs or pins 9 of each pair to work within the seats 11, so as to gradually force or turn the crank-arm 12 during the outward movement of' rod 3 to throw the propeller-blade from the position indicated by dotted line a,

Fig. 20f the drawings, into the position indicated by dotted line Z), Fig. 3 of the drawings. To change the position of the propellerblades 13 from that set forth in Fig. 1 of the drawings to a position such as'will during rotation of the propeller impart a reverse movement to the boats travel, the operating-rod 3 This movement i of the rod causes the studs or pins 9 to graduis forced or drawn. inward.

ally-move from within the seats 11 of the c'rankarms 12 and the pins or studs-8 to gradually enter within the seats 10 of the said crank-arms. The result is to gradually turn the crank-arms 12 with the movement of the operating-rod 3 and to throw the blades 13 into a'position or at an inclination indicated by dotted line d, Fig. 4 of the drawings.

' It will be understood that the described changes as to the position of the propellerblades are made without requiring the movement or rotation of the propeller-shaft 1 to be stopped, inasmuch as the rod 3 is actuated independent of the propeller-shaft 1.

It will be observed that the means employed for shifting the propeller-blades are entirely inclosed or housed within the propeller-hub 2, being thus protected from contacting with and becoming clogged or choked by seaweed driving of small-size boats, the object being to enable the boats speed to be quickly varied or its direction of travel changed without disturbing the operation or movement of the drive mechanism for the propeller.

Having thus described the invention, what isclaimed as new, and desired to be protected by Letters Patent, is*- A propeller comprising a hub, a series of propeller-blades rotatably secured therein, a series of cranks located within the hub and connected to the shank of each blade, a pair of seats cut in each crank, a longitudinallymovable rod working through the hub, and a series of projecting studs carried by said rod, said studs engaging with the seats of the cranks so as to operate the said cranks to shift the blades during longitudinal movement of the rod.

In witness whereof I have hereunto set my hand.

HERRMAN ENGE.

Witnesses:

N. A. AOKER, D. B. RICHARDS.

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