US2021006A - Air friction type governor - Google Patents

Description

Nov. 12, 1935. H H, HA KINS 2,021,006

AIR FRICTION TYPE GOVERNOR v 2 Sheets-Sheet 1 Filed Nov. 2'7, 1934 INVENTOR ATI'ORNEY Nov. 12, 1935, H. H. HAWKINS AIR FRICTION TYPE GOVERNOR 2 Sheets-Shet 2 FiledNov. 27, 1934 INVENTOR BY A4 W M./mW

ATTORNEY Patented Nov. 12, 1935 raisin orifice AIR FRICTION TYPE GOVERNOR Henry H. Hawkins, Onondaga, Mich. Application November 27, 1934, Serial No. 755,070

4 Claims.

This invention relates to air friction types of governors intended to be connected with and to control the speed and power of internal combustion motors, and it be applied to any stationary engine on the market to-day.

The object of the invention is the construction of a reliable governing mechanism comprising the fewest number of parts or" the simplest construction and arrangement, very cheap to manufacture, quickly and easily attached to any Zl10- tor, and which practically is free from excessive wear in use and cannot get out of order. In this invention advantage is taken of the resistance of the air to impede a vibrating pan or plate of special construction as hereinbelow described, and as set forth in the accompanying drawings constituting a part of this application.

Fig. i represents a side view of a motor having this invention applied thereto.

Fig. 2 is a top View of the parts illustrated in Fig. i.

Fig. 3 is a cross section of the engine shaft and cam hub. of the flywheel showing the flattened portion of the hub and the arrangement of this invention with respect thereto, and to the ex haust valve rod, the operating devices of the rod being also delineated.

Fig. 4 is a top view of the governor rod showing the adjustable weight thereon, and the air impeded pan attached at one side of the rod.

Throughout the description and drawings the same number is employed to refer to the same part.

Considering Figs. 1 and 2, A is a stationary motor of which B is the flywheel. This invention is not limited in practice to any particular form of engine.

As best shown in Fig. 3, the motor shaft 2 has a hub or cam l secured thereon by One side 4 of the hub is flattened to provide the cam eifect.

A gear 5 on the motor shaft drives a pinion 6 which revolves a cam l in contact with the end of the exhaust valve rod 8, which is customarily equipped with a terminal roller as set forth. The valve operated by the rod is not shown as it forms no structural portion of this invention. Upon the end of the valve rod is erected a projection or stud 8. In a suitable position adjacent to the cam hub is arranged a pivot 9 carried by the en-- gine frame and borne by the pivot is a member termed for the purposes of this explanation the governor rod iii. As best shown in Figs. 3 and 4 the governor rod has a notched end it on one side of the pivot, and a pan or plate H on the the key 3.

other side of the pivot, below which pan is a protuberance it usually rounded and arranged to co-act with the cam hub. The end of the governor rod is usually screw threaded as at it and provided with the weight l2 adjustable upon 5 the rod end.

In Fig. 3 it will be noted that the pan H has an upper concave surface and a lower convex surface. The purpose of that construction will be understood from the description of the operation 10 of this invention.

With the parts respectively located as in Fig. 3 it will be seen that the revolution of the cam hub vibrates the governor rod. The concave upper surface of the pan as the rod moves upwardly is resisted or impeded by the air to a greater degree than is the convex lower surface of the pan during its downward movement under the vibratory condition existing while the motor shaft revolves. When the motor runs at a predetermined and desired speed the governor rod vibrates in the manner intended and the end of the rod does not engage the projection upon the valve rod for a sumcient time to interfere with the normal peri ds of the exhaust of the motor in regular order. When, however, the motor races for any cause, the vibration of the governor rod becomes excessive and it tends to assume the position illustrated in Fig. 3, wherein the notched end of the governor rod engages the projection of the valve rod and holds the rod in open valve position until the speed returns to the proper velocity.

It is found in practice that the concave upper surface of the air impeded pan or plate enables an adjustment of the weight upon the governor rod to be set for any velocity that may be desired for the engine shaft.

Having now described this invention and the manner of its use, I claim:-

1. In a governor mechanism of the character described, in combination with a driven shaft, a cam on the shaft, a pivotal governor rod adjacent to the earn, an air impeded member borne by the rod, said cam and governor rod being constructed and arranged to mutually co-actwhereby the rod is vibrated by the earn, a valve rod, means actuated by the said shaft to move the valve rod, said valve rod having a pro ection, and the said governor rod having a portion constructed and arranged to engage the said projection and hold valve rod in open valve position when the driven shaft exceeds a safe predetermined speed.

2. In a governor mechanism of the character described, in combination with a driven shaft, a

cam on the shaft, a pivotal governor rod adjacent to the cam, an air impeded pan borne by the rod, the said pan having an upper concave surface and a lower convex surface, said cam and governor rod being constructed and arranged to mutually co-act whereby the rod and pan are vibrated by the cam, a valve rod, means actuated by the said shaft to move the valve rod, said valve rod having a projection, and the said governor to engage the said projection and hold the valve described, in combination with a driven shaft, a cam on the shafn'a pivotal governor rod adj acent to the cam, said rodbeing provided with an air impeded member, the said rod being also. providediwith a weight adjustable towards and from the pivot of said rod, said cam and governor' rodbeing constructed and arranged to mutually co-act whereby the rod is vibrated by the cam, a valve rod, means actuated by the said rod having a portion constructed and arranged r'od'in open valve position when the'driven shaft 7 exceeds a safe predetermined speed and means 'to release the rod from said position.

3. In a governor mechanism of the character shaft to move the valve rod, said valve rod having a projection, and the said governor rod having a portion constructed and arranged to engage the said projection and hold the valve rod in open valve position when the safe predetermined speed and to release, the rod when the driven shaft falls to safe predetermined speed. 7

4. In a governor mechanism of the character described, in combination with a driven shaft; a 10 carn on the said shaft, vibratory means having i an air impeded portion and arranged tobeiacted 7 upon by the cam, devices for'adjusting the speed and extent of the vibrations, a valve rod, means a actuated bysaidv shaft to move the valve rod, the 16 said vibratory means and valve rod being pro-.. vided with devices adapted to become engaged and disengaged whereby the'valve rod may be held in its open valve position when the driven shaft exceeds a safe predetermined speed or re- 20 leased therefrom when the driven shaft falls'to safe predetermined speed.

HENRY H. HAWKINS.

driven shaft exceeds a "5

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