US1837941A - Automatic gate - Google Patents

Description

A. BALTZER AUTOMATI C GATE Dec. 22, 1931.

4 Sheets-Sheet 1 Filed Jan. 1'7, 1931 I fad/120.7 fiefizez;

INVENTOR ATTOR NEY NHLF Lg/2 kw as Dec. 22,- 1931. A. BALTZER 1,837,941

AUTOMATIC GATE Filed Jan. 17, 1931 4 Sheets-Sheet 2 Q3 qw INVENTOR ATTORNEY 4 Sheets-Sheet A. BALTZER AUTOMATIC GATE Filed Jan. 17. 1951 Dec. 22, 1931.

Dec. 22, 1931. A. BALTZER 1,837,941

AUTOMATIC GATE Filed Jan. 17, 1931 4 Sheets-Sheet 4 INVENTOR ATTORNEY Patented Dec. 22, 1931 UNETED STATES PATENT OFFICE AUTOMATIC GATE Application filed January 17, 1931.

This invention relates to gates and has particular reference to automatically operated gates, whereby the weight of a vehicle will operate mechanism to open the gate and permit the vehicle an unobstructed passage.

An object of the invention is the provision of a gate of novel construction which is normally arranged in vertical position to provide an obstruction to vehicular passage, but

go when moved to a lowered or open position,

will permit of the passage of vehicles.

Another object of the invention is the provision of novel means for controlling the 7 operation of the gate, together with releas- 5 able means to hold the gate against operation until the operating mechanism is actuated.

With the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claim.

In the drawings I Figure 1 is a plan view of the invention showing the gate in closed position.

Figure 2 is a like view with the gate open.

Figure 3 is a sectional view on the line 33 of Figure 1.

Figure 4 is a like view on the line 4l4 of Figure 2.

Figure 5 is a transverse sectional view taken substantially on the line 5-5 of Figure 1.

3.3 Figure 6 is a sectional view on the line 6-6 of Figure 2.

Figure 7 is a fragmentary bottom plan View showing one corner of the platform.

Figure 8 is a fragmentary elevation on an 4. enlarged scale showing one end of the gate.

Figure 9 is a top plan View of the same. Figure 10 is a fragmentary plan view of one end of one of the depressible tread members and the adjacent portion of the platform.

Figure 11 is a section on the line 1111 of Figure 10.

Referring to the drawings in detail wherein like characters of reference denote corre- W sponding parts, the reference character 15 Serial No. 509,478.

indicates a platform which is arranged on substantially the same level as the level of the roadway 16. This platform is enclosed within a casing which includes parallel side walls 17 and end walls 18.

The platform is provided with longitudinally extending parallel slots 19. These slots are disposed longitudinally of the roadway 16 and accommodate normally flush depressible tread members 20. Hingedly secured to the'ends of the tread members 20 as shown at 21, are plates 22, and these plates extend through openings 23 provided in the ends 18 of the housing. Vhen the tread members 20 are in their normally elevated position as shown in Figure 3 of the drawings, the plates 22 will extend horizontally outward so as to provide for the passage of Vehicle wheels from the roadway on the adj acent ends of the tread members. WVhen the tread members are depressed as shown in Figure 4 of the drawings, these plates 22 will incline upwardly so that the wheels of the vehicle may pass upward from the tread members to the surface of the roadway.

Rising from the sides 17 of the housing are posts 24 and the space between these posts is bridged by a gate 25. This gate is normally elevated to obstruct passage between the posts and for this purpose its lower edge is pivotso ally mounted in bearings 26.

The gate 25 preferably includes a frame formed of upper and lower parallel bars 27 and end connecting bars 28, the lower bar 27 extending through the bearings 26 for the pivotal mounting of the gate. The gate further includes an intermediate section or panel 29 and end sections or panels 30. These end sections or panels 30 are connected to the section or panel 29 by means of offset sections formed in the bars 27 and 28 and indicated at 31. These olfset sections 31 are arranged directly above the tread members 20 and when the gate is in its raised or closed position, these offset portions 31 will extend horizontally outward. However, when the tread members are depressed and the gate 25 is likewise depressed, these offset portions or sections 31 will extend downward into the openings 19 of the platform as shown in Figures f and 6 of the drawings and provide a passage for the wheels of a vehicle.

Mounted in bearings 32 arranged transversely below the platform is a rock shaft 33. This shaft is provided with spaced offset portions 34, defining crank arms which are pivotally secured to the under sides of the tread members 20 as shown at 35. The outer ends of the rock shafts 33 have crank arms 36 extending therefrom.

Extending from opposite ends of the low-' er bar 27 of the gate are crank arms 37. These arms have pivotally connected thereto the inner ends of connecting rods 38, while the outer ends of these rods are pivotally connected to the crank arms 36 of the rock shafts 33. Downward movement of the tread members 20 will, through the rod and arm connections just described, move the gate pivotally downward from the position shown in Figure 3 to the position shown in Figure a, so that a vehicle supported by the tread members 20 may pass over the gate, the wheels passing through the offset portions 31. Springs 39 which connect certain of the rods 38 with the side members 17 of the housing, act to yieldingly hold the gate and treads in normally raised position.

Pivot-ally mounted upon one of the posts 24 in a bearing 40, is a shaft 41. This shaft has extending from one end an arm 42. A link 43 has one of its ends pivotally secured to the outer end of the arm 42 and its other end pivotally secured to the arm 37' at the point ofpivotal connection of the latter with the rods 38. Thus, movement of the tread members 20 will rock the shaft 41 pivotally. The opposite end of the shaft carries a latch 44 whose end engages the upper bar 27 of the gate when the latter is in its raised or closed position, so that pressure upon the gate will prevent its being forced downward until this latch 44: is released. However, when the tread members 20 are depressed, the shaft ll will be moved pivotally as previously described, so that the latch 44 will swing upward and release the gate and permit the same to be moved to its lowered or open position.

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scope of the appended claim.

Having described the invention what is claimed is In a gate, a platform having spaced paral lel openings therein adapted to be disposed longitudinally of a roadway, yieldingly mounted tread memberslocated within the openings and normally disposed flush with the surface of the platform, a normally vertical gate arranged transversely of the tread members, means to pivotally mount the lower edge of the gate, whereby the latter may be swung downward to a horizontal position, means included in the ate structure for passage through the plat orm openings to provide for the passage of the wheels of a vehicle, a rock shaft mounted transversely beneath the treads, spaced crank arms extending from said shafts and pivotally secured to the treads, crank arms at the ends of the rock shafts, crank arms extending from opposite ends of the gate, and rods connecting the last mentioned crank arms with the crank arms at the ends of the crank shafts to swing the gate downward when the treads are depressed.

In testimony whereof I ailix my signature.

ANDREAS BALTZER.

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